crates/signed_core/src/filters.rs

@@ -6,11 +6,11 @@ use crate::RepoAddr;
 
 /// Kinds that make up the activity of a repository.
 pub const ACTIVITY_KINDS: [Kind; 9] = [
+    Kind::Comment,
     Kind::GitPatch,
     Kind::GitPullRequest,
     Kind::GitPullRequestUpdate,
     Kind::GitIssue,
-    Kind::Comment,
     Kind::GitStatusOpen,
     Kind::GitStatusApplied,
     Kind::GitStatusClosed,

crates/signed_core/src/lib.rs

@@ -13,6 +13,6 @@ pub use annotations::{COVER_NOTE_KIND, cover_note, labels_and_subject, subject_o
 pub use clone_url::{CloneTarget, parse_clone_url};
 pub use comments::{CommentThread, comment_threads};
 pub use deletions::Deletions;
-pub use model::{Announcement, activity_subject, pull_request_patch};
+pub use model::{Announcement, activity_subject, pull_request_patch, pull_request_patches};
 pub use state::{build_state, parse_state};
 pub use status::{RepoStatus, references_root, resolve_status};

crates/signed_core/src/model.rs

@@ -3,6 +3,8 @@ use std::collections::HashSet;
 use gpui::SharedString;
 use nostr::prelude::*;
 
+use crate::RepoAddr;
+
 /// Parsed NIP-34 repository announcement (plain data, ready for the UI).
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Announcement {
@@ -28,11 +30,53 @@ pub struct Announcement {
     pub maintainers: Vec<PublicKey>,
     /// Value of a `u` tag, if any: this repository is a subordinate fork of
     /// the referenced upstream (NIP-34).
-    pub upstream: Option<String>,
+    pub upstream: Option<Upstream>,
     /// Hashtags labelling the repository (`t` tags).
     pub hashtags: Vec<String>,
 }
 
+/// The `u` tag of a fork announcement (NIP-34)
+/// the repository this one is a subordinate fork of. The first value is
+/// the upstream coordinate (`30617:<pubkey>:<id>`) or a git URL.
+/// The second is an optional relay hint for the upstream.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Upstream {
+    /// Raw first value of the `u` tag (coordinate or git URL).
+    pub raw: String,
+    /// The upstream `30617:<pubkey>:<id>` coordinate, when the `u` tag
+    /// references a NIP-34 repository; `None` for the git-URL form.
+    pub addr: Option<RepoAddr>,
+    /// Relay hint for the upstream, if the `u` tag carries one.
+    pub relay_hint: Option<RelayUrl>,
+}
+
+impl Upstream {
+    /// Parse the `u` tag values. The first is the upstream coordinate or a
+    /// git URL (the coordinate form may append `|git-url`; the coordinate is
+    /// the part before the first `|`), the second an optional relay hint.
+    fn parse(raw: &str, relay_hint: Option<&str>) -> Self {
+        let coordinate = raw.split('|').next().unwrap_or(raw);
+        let addr = coordinate
+            .parse::<Coordinate>()
+            .ok()
+            .filter(|c| c.kind == Kind::GitRepoAnnouncement);
+        Self {
+            raw: raw.to_owned(),
+            addr,
+            relay_hint: relay_hint.and_then(|hint| RelayUrl::parse(hint).ok()),
+        }
+    }
+
+    /// Text for display: the upstream coordinate when it is a NIP-34
+    /// repository, otherwise the raw `u` value (git-URL form).
+    pub fn display(&self) -> SharedString {
+        match &self.addr {
+            Some(addr) => SharedString::from(addr.to_string()),
+            None => SharedString::from(self.raw.clone()),
+        }
+    }
+}
+
 /// Subject of a NIP-34 issue or pull request event: the `subject` tag,
 /// falling back to the first non-empty line of the content.
 pub fn activity_subject(event: &Event) -> SharedString {
@@ -193,7 +237,7 @@ impl Announcement {
         let mut relays: Vec<RelayUrl> = Vec::new();
         let mut euc: Option<String> = None;
         let mut maintainers: Vec<PublicKey> = Vec::new();
-        let mut upstream: Option<String> = None;
+        let mut upstream: Option<Upstream> = None;
 
         for tag in event.tags.iter() {
             match Nip34Tag::parse(tag.as_slice()) {
@@ -208,9 +252,13 @@ impl Announcement {
             }
 
             // The `u` tag is not modelled by the SDK's `Nip34Tag`; parse it
-            // manually (first value wins).
+            // manually (first wins).
             if upstream.is_none() && tag.kind() == "u" {
-                upstream = tag.content().map(str::to_owned);
+                let values = tag.as_slice();
+                let raw = values.get(1).map(String::as_str).unwrap_or_default();
+                if !raw.is_empty() {
+                    upstream = Some(Upstream::parse(raw, values.get(2).map(String::as_str)));
+                }
             }
         }
 
@@ -391,14 +439,55 @@ mod tests {
     fn parses_upstream_tag() {
         let event = announcement_event(&[
             &["d", "my-fork"],
-            &["u", "30617:abc:upstream|https://example.com/upstream.git"],
+            &[
+                "u",
+                "30617:68d81165918100b7da43fc28f7d1fc12554466e1115886b9e7bb326f65ec4272:upstream|https://example.com/upstream.git",
+                "wss://relay.example.com",
+            ],
         ]);
 
         let announcement = Announcement::from_event(&event).expect("parses");
+        let upstream = announcement.upstream.expect("parses the u tag");
 
+        // The coordinate part resolves to a repository address; the raw
+        // value keeps the `|git-url` suffix.
         assert_eq!(
-            announcement.upstream.as_deref(),
-            Some("30617:abc:upstream|https://example.com/upstream.git")
+            upstream.addr,
+            Some(crate::repo_addr(
+                PublicKey::from_hex(MAINTAINER_HEX).expect("valid pubkey"),
+                "upstream"
+            ))
+        );
+        assert_eq!(
+            upstream.raw,
+            "30617:68d81165918100b7da43fc28f7d1fc12554466e1115886b9e7bb326f65ec4272:upstream|https://example.com/upstream.git"
+        );
+        assert_eq!(
+            upstream.relay_hint,
+            Some(RelayUrl::parse("wss://relay.example.com").expect("valid relay"))
+        );
+        assert_eq!(
+            upstream.display().to_string(),
+            "30617:68d81165918100b7da43fc28f7d1fc12554466e1115886b9e7bb326f65ec4272:upstream"
+        );
+    }
+
+    #[test]
+    fn parses_git_url_upstream() {
+        // The `u` tag may reference a non-nostr upstream by git URL only;
+        // there is no repository address to navigate to.
+        let event = announcement_event(&[
+            &["d", "my-fork"],
+            &["u", "https://example.com/upstream.git"],
+        ]);
+
+        let announcement = Announcement::from_event(&event).expect("parses");
+        let upstream = announcement.upstream.expect("parses the u tag");
+
+        assert_eq!(upstream.addr, None);
+        assert_eq!(
+            upstream.display().to_string(),
+            "https://example.com/upstream.git"
         );
     }
 

crates/signed_git/src/lib.rs

@@ -195,6 +195,185 @@ pub fn apply_patch(repo_path: &Path, patch: &str) -> Result<()> {
     Ok(())
 }
 
+/// The merge base of two revisions (branch names, remote-tracking refs or
+/// commit ids) in the repository at `repo_path`. `Ok(None)` when the
+/// revisions share no common ancestor; unresolvable revisions are errors.
+pub fn merge_base(repo_path: &Path, a: &str, b: &str) -> Result<Option<String>> {
+    let output = Command::new("git")
+        .arg("-C")
+        .arg(repo_path)
+        .args(["merge-base", a, b])
+        .env("GIT_TERMINAL_PROMPT", "0")
+        .stderr(Stdio::piped())
+        .output()
+        .context("failed to spawn `git merge-base`")?;
+
+    match output.status.code() {
+        // Exit 1: no common ancestor (a valid outcome for a proposal).
+        Some(1) => Ok(None),
+        Some(0) => Ok(Some(
+            String::from_utf8_lossy(&output.stdout).trim().to_owned(),
+        )),
+        _ => bail!(
+            "git merge-base failed: {}",
+            String::from_utf8_lossy(&output.stderr).trim()
+        ),
+    }
+}
+
+/// The `git format-patch` series of `base..tip` (mbox), like
+/// `git format-patch --stdout`. Fails when the range has no commits. The
+/// mbox is returned untrimmed; trailing newlines are part of the format.
+pub fn format_patch_between(repo_path: &Path, base: &str, tip: &str) -> Result<String> {
+    let output = Command::new("git")
+        .arg("-C")
+        .arg(repo_path)
+        .args(["format-patch", "--stdout", &format!("{base}..{tip}")])
+        .env("GIT_TERMINAL_PROMPT", "0")
+        .stderr(Stdio::piped())
+        .output()
+        .context("failed to spawn `git format-patch`")?;
+
+    if !output.status.success() {
+        bail!(
+            "git format-patch failed: {}",
+            String::from_utf8_lossy(&output.stderr).trim()
+        );
+    }
+    let patch = String::from_utf8_lossy(&output.stdout).into_owned();
+    if patch.trim().is_empty() {
+        bail!("no commits between {base} and {tip}");
+    }
+    Ok(patch)
+}
+
+/// Whether `patch` (a `git format-patch` series) applies to the working
+/// tree of `repo_path`, without modifying anything
+/// (`git apply --check --3way`). Best-effort: useful to surface conflicts
+/// before a patch is published or applied.
+pub fn patch_applies(repo_path: &Path, patch: &str) -> Result<()> {
+    let mut child = Command::new("git")
+        .arg("apply")
+        .args(["--check", "--3way", "--whitespace=nowarn", "-"])
+        .current_dir(repo_path)
+        .stdin(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .context("failed to spawn `git apply --check`")?;
+
+    child
+        .stdin
+        .as_mut()
+        .expect("stdin piped")
+        .write_all(patch.as_bytes())?;
+
+    let output = child.wait_with_output()?;
+    if !output.status.success() {
+        bail!(
+            "patch does not apply: {}",
+            String::from_utf8_lossy(&output.stderr).trim()
+        );
+    }
+    Ok(())
+}
+
+/// Push `commit` to `reference` (e.g. `refs/nostr/<event-id>`) on the git
+/// server at `url`, from the repository at `repo_path`. GRASP servers host
+/// the `refs/nostr` namespace so anyone can contribute a commit; nak pushes
+/// pull request tips there before publishing the PR event, and readers
+/// fetch the ref to get the commit behind a PR's `c` tag.
+pub fn push_commit_ref(repo_path: &Path, url: &str, commit: &str, reference: &str) -> Result<()> {
+    let output = Command::new("git")
+        .arg("-C")
+        .arg(repo_path)
+        .args(["push"])
+        .arg(url)
+        .arg(format!("{commit}:{reference}"))
+        .env("GIT_TERMINAL_PROMPT", "0")
+        .stderr(Stdio::piped())
+        .output()
+        .context("failed to spawn `git push`")?;
+
+    if !output.status.success() {
+        bail!(
+            "git push failed: {}",
+            String::from_utf8_lossy(&output.stderr).trim()
+        );
+    }
+    Ok(())
+}
+
+/// Split a `git format-patch` series into its individual patches (mbox
+/// messages). Each message begins with a `From <40-hex> ` boundary line;
+/// `>From` quoting inside bodies means no false positives. A single patch
+/// yields one element; a malformed input yields one element covering it.
+pub fn split_patch_series(patch: &str) -> Vec<&str> {
+    let mut starts = vec![0usize];
+    let mut search_from = 1;
+    while let Some(rel) = patch[search_from..].find("\nFrom ") {
+        let ix = search_from + rel + 1;
+        let hex = patch[ix + 5..]
+            .split(|c: char| !c.is_ascii_hexdigit())
+            .next()
+            .unwrap_or("");
+        if hex.len() == 40 {
+            starts.push(ix);
+        }
+        search_from = ix + 1;
+    }
+
+    starts
+        .iter()
+        .enumerate()
+        .map(|(i, &start)| {
+            let end = starts.get(i + 1).copied().unwrap_or(patch.len());
+            &patch[start..end]
+        })
+        .collect()
+}
+
+/// The commit HEAD points to in the repository at `repo_path`, or `None`
+/// when the repository has no commits yet (unborn HEAD).
+pub fn head_commit_id(repo_path: &Path) -> Result<Option<String>> {
+    let output = Command::new("git")
+        .arg("-C")
+        .arg(repo_path)
+        .args(["rev-parse", "HEAD"])
+        .env("GIT_TERMINAL_PROMPT", "0")
+        .stderr(Stdio::piped())
+        .output()
+        .context("failed to spawn `git rev-parse`")?;
+
+    if !output.status.success() {
+        return Ok(None);
+    }
+    Ok(Some(
+        String::from_utf8_lossy(&output.stdout).trim().to_owned(),
+    ))
+}
+
+/// The commits in `base..HEAD` of the repository at `repo_path`, oldest
+/// first (the order `git am` creates them); `HEAD` alone when `base` is
+/// `None`. An empty range yields an empty list.
+pub fn commits_since(repo_path: &Path, base: Option<&str>) -> Result<Vec<String>> {
+    let output = match base {
+        Some(base) => git_in(
+            repo_path,
+            &["rev-list", "--reverse", &format!("{base}..HEAD")],
+        )?,
+        // No `base` (unborn HEAD): there is nothing to walk yet.
+        None => match git_in(repo_path, &["rev-parse", "HEAD"]) {
+            Ok(head) => head,
+            Err(_) => return Ok(Vec::new()),
+        },
+    };
+    Ok(output
+        .lines()
+        .map(str::to_owned)
+        .filter(|line| !line.is_empty())
+        .collect())
+}
+
 fn clone(url: &str, path: &Path) -> Result<gix::Repository> {
     // GRASP servers announce `grasp://<host>/<owner>/<repo>` clone URLs;
     // the transport is git smart HTTP, so rewrite the scheme for gix.
@@ -1884,6 +2063,200 @@ mod tests {
         git_run(repo.workdir().expect("workdir"), &["commit", "-m", message]);
     }
 
+    #[test]
+    fn merge_base_finds_the_fork_point_and_reports_unrelated_history() {
+        let dir = tempfile::tempdir().expect("tempdir");
+        let path = dir.path().join("repo");
+        let initial = init_repository(&path, "My Repo", "desc").expect("init");
+
+        // A feature branch and a mainline commit diverge from the initial
+        // commit; it is their merge base.
+        git_run(&path, &["checkout", "-b", "feature"]);
+        std::fs::write(path.join("feature.txt"), "feature\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "feature commit");
+        git_run(&path, &["checkout", "main"]);
+        std::fs::write(path.join("main.txt"), "main\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "mainline commit");
+
+        assert_eq!(
+            merge_base(&path, "feature", "main")
+                .expect("merge base")
+                .as_deref(),
+            Some(initial.as_str())
+        );
+
+        // An orphan branch shares no history with main: `Ok(None)`.
+        git_run(&path, &["checkout", "--orphan", "orphan"]);
+        std::fs::write(path.join("orphan.txt"), "orphan\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "orphan commit");
+        assert_eq!(merge_base(&path, "orphan", "main").expect("ok"), None);
+
+        // An unresolvable revision is an error, not a missing ancestor.
+        assert!(merge_base(&path, "orphan", "no-such-ref").is_err());
+    }
+
+    #[test]
+    fn format_patch_between_produces_the_series_and_rejects_empty_ranges() {
+        let dir = tempfile::tempdir().expect("tempdir");
+        let path = dir.path().join("repo");
+        let initial = init_repository(&path, "My Repo", "desc").expect("init");
+
+        git_run(&path, &["checkout", "-b", "feature"]);
+        std::fs::write(path.join("feature.txt"), "feature\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "feature commit");
+
+        let patch = format_patch_between(&path, &initial, "feature").expect("patch");
+        assert!(patch.contains("Subject: [PATCH] feature commit"));
+        assert!(patch.contains("feature.txt"));
+
+        // An empty range has no commits to send.
+        assert!(format_patch_between(&path, "feature", "feature").is_err());
+    }
+
+    #[test]
+    fn patch_applies_checks_without_modifying_the_tree() {
+        let dir = tempfile::tempdir().expect("tempdir");
+        let path = dir.path().join("repo");
+        let initial = init_repository(&path, "My Repo", "desc").expect("init");
+
+        git_run(&path, &["checkout", "-b", "feature"]);
+        std::fs::write(path.join("feature.txt"), "feature\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "feature commit");
+        let patch = format_patch_between(&path, &initial, "feature").expect("patch");
+
+        // A clone of the initial state accepts the series...
+        let clone = dir.path().join("clone");
+        git_run(
+            dir.path(),
+            &[
+                "clone",
+                "-q",
+                path.to_str().unwrap(),
+                clone.to_str().unwrap(),
+            ],
+        );
+        git_run(&clone, &["checkout", "-q", &initial]);
+        assert!(patch_applies(&clone, &patch).is_ok());
+        // ...and the check must not have modified the working tree.
+        assert!(!clone.join("feature.txt").exists());
+
+        // A conflicting file makes the same series fail the check.
+        std::fs::write(clone.join("feature.txt"), "conflicting\n").expect("write");
+        assert!(patch_applies(&clone, &patch).is_err());
+    }
+
+    #[test]
+    fn push_commit_ref_pushes_to_the_event_namespace() {
+        // A bare "server" repository reachable via a `file://` URL, like a
+        // grasp server's `{base}/{owner}/{repo-id}.git` layout.
+        let server = tempfile::tempdir().unwrap();
+        let server_repo = server.path().join("npub1test").join("my-repo.git");
+        std::fs::create_dir_all(server_repo.parent().unwrap()).unwrap();
+        let init_status = Command::new("git")
+            .args(["init", "--bare", "-q"])
+            .arg(&server_repo)
+            .status()
+            .expect("spawn git init --bare");
+        assert!(init_status.success());
+
+        let (dir, repo) = fixture(&[("a.txt", b"one")]);
+        commit_all(&repo, "initial");
+        let dir = dir.path();
+        let tip = git_in(dir, &["rev-parse", "HEAD"]).expect("tip");
+
+        let url = format!("file://{}/npub1test/my-repo.git", server.path().display());
+        push_commit_ref(dir, &url, &tip, "refs/nostr/abcd1234").expect("push");
+
+        let refs = git_in(&server_repo, &["show-ref"]).expect("server refs");
+        assert!(refs.contains("refs/nostr/abcd1234"));
+    }
+
+    #[test]
+    fn split_patch_series_splits_real_multi_commit_mboxes() {
+        let dir = tempfile::tempdir().expect("tempdir");
+        let path = dir.path().join("repo");
+        let initial = init_repository(&path, "My Repo", "desc").expect("init");
+
+        git_run(&path, &["checkout", "-b", "feature"]);
+        std::fs::write(path.join("one.txt"), "one\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "first commit");
+        std::fs::write(path.join("two.txt"), "two\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "second commit");
+
+        let series = format_patch_between(&path, &initial, "feature").expect("series");
+        let parts = split_patch_series(&series);
+
+        assert_eq!(parts.len(), 2);
+        assert!(parts[0].contains("Subject: [PATCH 1/2] first commit"));
+        assert!(parts[1].contains("Subject: [PATCH 2/2] second commit"));
+        // Each part starts its own mbox message with its own commit id.
+        let first = parts[0].lines().next().expect("first header");
+        let second = parts[1].lines().next().expect("second header");
+        assert!(first.starts_with("From ") && first.len() >= 45);
+        assert_ne!(first, second);
+    }
+
+    #[test]
+    fn split_patch_series_keeps_single_patches_whole() {
+        let patch = "From abcdefabcdefabcdefabcdefabcdefabcdefab Mon Sep 17 00:00:00 2001\nFrom: A <a@b>\nSubject: [PATCH] fix\n\n---\n";
+        let parts = split_patch_series(patch);
+        assert_eq!(parts.len(), 1);
+        assert_eq!(parts[0], patch);
+    }
+
+    #[test]
+    fn head_commit_and_commits_since_track_applied_commits() {
+        let dir = tempfile::tempdir().expect("tempdir");
+        let path = dir.path().join("repo");
+        let initial = init_repository(&path, "My Repo", "desc").expect("init");
+
+        assert_eq!(
+            head_commit_id(&path).expect("head").as_deref(),
+            Some(initial.as_str())
+        );
+        // No commits yet: `HEAD` alone.
+        assert_eq!(
+            commits_since(&path, None).expect("commits"),
+            vec![initial.clone()]
+        );
+
+        std::fs::write(path.join("one.txt"), "one\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "first commit");
+        let first = head_commit_id(&path).expect("head").expect("on a branch");
+
+        std::fs::write(path.join("two.txt"), "two\n").expect("write");
+        commit_all(&gix::open(&path).expect("open"), "second commit");
+        let second = head_commit_id(&path).expect("head").expect("on a branch");
+
+        // Oldest first, like the order `git am` creates them.
+        assert_eq!(
+            commits_since(&path, Some(&initial)).expect("commits"),
+            vec![first.clone(), second.clone()]
+        );
+        assert_eq!(
+            commits_since(&path, Some(&first)).expect("commits"),
+            vec![second]
+        );
+    }
+
+    #[test]
+    fn head_commit_reports_unborn_repositories() {
+        let dir = tempfile::tempdir().expect("tempdir");
+        let path = dir.path().join("repo");
+        let status = Command::new("git")
+            .args(["init", "-q"])
+            .arg(&path)
+            .status()
+            .expect("spawn git init");
+        assert!(status.success());
+
+        assert_eq!(head_commit_id(&path).expect("head"), None);
+        assert_eq!(
+            commits_since(&path, None).expect("commits"),
+            Vec::<String>::new()
+        );
+    }
+
     #[test]
     fn init_repository_creates_main_branch_and_readme() {
         let dir = tempfile::tempdir().expect("tempdir");

crates/signed_state/src/backend.rs

@@ -1302,6 +1302,55 @@ impl Backend {
         })
     }
 
+    /// Broadcast and locally store an already-signed event, like
+    /// [`Self::send`] without the signing step. Callers that signed early
+    /// (e.g. to learn the event id before pushing a commit to the grasp
+    /// servers) publish through this.
+    pub fn publish_event(
+        &mut self,
+        event: Event,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<Event, Error>> {
+        let client = self.client.clone();
+
+        cx.spawn(async move |this, cx| {
+            let work = cx.background_spawn(async move {
+                let output = client.send_event(&event).await?;
+
+                if output.success.is_empty() && !output.failed.is_empty() {
+                    let reasons = output
+                        .failed
+                        .values()
+                        .cloned()
+                        .collect::<Vec<String>>()
+                        .join(", ");
+                    return Err(anyhow!("event not accepted by any relay: {reasons}"));
+                }
+
+                Ok(event.clone())
+            });
+
+            let result = work.await;
+
+            match &result {
+                Ok(event) => {
+                    this.update(cx, |_this, cx| {
+                        cx.emit(BackendEvent::Published(Box::new(event.clone())));
+                    })
+                    .ok();
+                }
+                Err(e) => {
+                    this.update(cx, |_this, cx| {
+                        cx.emit(BackendEvent::error(e.to_string()));
+                    })
+                    .ok();
+                }
+            }
+
+            result
+        })
+    }
+
     /// Publish a NIP-34 repository announcement (kind 30617) with the
     /// current signer. The returned task yields the published event, so
     /// callers can show inline progress/errors.
@@ -1414,7 +1463,12 @@ async fn connect_repo_relays_only(
         let relays = &relays;
         let sync_opts = sync_opts.clone();
         async move {
-            if let Err(e) = client.sync(filter).with(relays.iter()).opts(sync_opts).await {
+            if let Err(e) = client
+                .sync(filter)
+                .with(relays.iter())
+                .opts(sync_opts)
+                .await
+            {
                 log::warn!("repo relay negentropy sync failed: {e}");
             }
         }
@@ -1469,7 +1523,7 @@ fn with_master_key(uri: &str, keys: &Keys) -> String {
 /// A `https://<host>` (or `http://<host>` for `ws://` grasp servers, like
 /// ngit) base URL for a grasp server. The repository then lives at
 /// `{base}/{npub}/{repo-id}.git`.
-fn grasp_base_url(relay: &RelayUrl) -> Option<String> {
+pub(crate) fn grasp_base_url(relay: &RelayUrl) -> Option<String> {
     // `domain()` drops the port; parse the full URL to keep it (local dev
     // grasp servers commonly run on a custom port).
     let parsed = Url::parse(relay.as_str()).ok()?;

crates/signed_state/src/profile.rs

@@ -163,7 +163,8 @@ impl ProfileStore {
 
     /// Load recently seen profiles from the local database.
     fn load(&mut self, cx: &mut Context<Self>) {
-        let client = Backend::global(cx).read(cx).client();
+        let backend = Backend::global(cx);
+        let client = backend.read(cx).client();
 
         let work = cx.background_spawn(async move {
             let filter = Filter::new().kind(Kind::Metadata).limit(200);
@@ -197,7 +198,8 @@ impl ProfileStore {
 
     /// Re-read the latest metadata of an author from the local database.
     fn apply_author(&mut self, public_key: PublicKey, cx: &mut Context<Self>) {
-        let client = Backend::global(cx).read(cx).client();
+        let backend = Backend::global(cx);
+        let client = backend.read(cx).client();
 
         let work = cx.background_spawn(async move {
             let filter = Filter::new().kind(Kind::Metadata).author(public_key);
@@ -238,7 +240,8 @@ impl ProfileStore {
             return;
         }
 
-        let client = Backend::global(cx).read(cx).client();
+        let backend = Backend::global(cx);
+        let client = backend.read(cx).client();
 
         let work = cx.background_spawn(async move {
             let filter = Filter::new().kind(Kind::Metadata).authors(authors);

crates/signed_state/src/repo.rs

@@ -1,23 +1,30 @@
 use std::borrow::Cow;
 use std::collections::{HashMap, HashSet};
+use std::path::PathBuf;
 use std::time::Duration;
 
 use anyhow::Error;
-use gpui::{AppContext, Context, Subscription, Task};
+use bitcoin_hashes::sha1::Hash as Sha1Hash;
+use gpui::{AppContext, AsyncApp, Context, SharedString, Subscription, Task, WeakEntity};
 use nostr::event::IntoEventBuilder;
 use nostr_sdk::prelude::*;
 use signed_core::{
     Announcement, COVER_NOTE_KIND, Deletions, RepoAddr, RepoStatus, build_state, cover_note,
-    filters, labels_and_subject, parse_state, pull_request_patch, subject_override,
+    filters, labels_and_subject, parse_state, pull_request_patch, pull_request_patches,
+    subject_override,
 };
 
-use crate::backend::{Backend, BackendEvent};
+use crate::backend::{Backend, BackendEvent, grasp_base_url};
 use crate::git_store::GitStore;
 
 /// Delay between a refresh request and the actual re-query, so bursts of
 /// events (e.g. per-event `NostrUpdate`s) collapse into one query.
 const REFRESH_DEBOUNCE: Duration = Duration::from_millis(300);
 
+/// Maximum size of one patch event, following NIP-34's guidance that
+/// patches should be used when each event is under 60kb.
+const MAX_PATCH_EVENT_BYTES: usize = 60 * 1024;
+
 /// Per-repository store: announcement, state, issues, patches, PRs,
 /// comments and their resolved statuses. Always derived from the local
 /// database.
@@ -50,6 +57,9 @@ pub struct RepoStore {
     version: u64,
     /// Error of the last action initiated from this store, if any.
     pub last_error: Option<String>,
+    /// Non-fatal warning of the last action (e.g. a PR published without
+    /// its commit reaching a grasp server), if any.
+    pub last_warning: Option<String>,
     /// Relays announced by this repository (NIP-34 `relays` tag) that we
     /// have already been asked to connect to and fetch from, to avoid
     /// re-subscribing on every refresh.
@@ -128,6 +138,7 @@ impl RepoStore {
             labels: Vec::new(),
             version: 0,
             last_error: None,
+            last_warning: None,
             repo_relays: HashSet::new(),
             root_fetches: HashSet::new(),
             refreshing: false,
@@ -146,12 +157,22 @@ impl RepoStore {
         store
     }
 
+    /// Returns the repository's address.
     pub fn addr(&self) -> &RepoAddr {
         &self.addr
     }
 
-    /// Filters that make up a repository: announcement, state, activity and
-    /// deletions targeting it.
+    /// Returns the repository's name, or "Unknown" if not known.
+    pub fn name(&self) -> SharedString {
+        self.announcement
+            .as_ref()
+            .map_or(SharedString::default(), |a| {
+                a.name.clone().unwrap_or(SharedString::from("Unknown"))
+            })
+    }
+
+    /// Filters that make up a repository: announcement, state,
+    /// activity and deletions targeting it.
     fn repo_filters(addr: &RepoAddr) -> Vec<Filter> {
         let mut filters = vec![
             // Announcement and state share author and identifier, so they
@@ -191,8 +212,7 @@ impl RepoStore {
         });
     }
 
-    /// Fetch this repository's events from the bootstrap relays (one-shot,
-    /// auto-closing subscription).
+    /// Fetch this repository's events from the bootstrap relays
     fn subscribe_remote(&mut self, cx: &mut Context<Self>) {
         let backend = Backend::global(cx);
         let addr = self.addr.clone();
@@ -204,10 +224,8 @@ impl RepoStore {
 
     /// Re-query the local database and update all fields.
     ///
-    /// Debounced: a short delay collapses bursts of requests (e.g. per-event
-    /// `NostrUpdate`s), and requests that arrive while a query is running are
-    /// folded into one follow-up query. The query and processing run on a
-    /// background thread; only the results are applied on the main thread.
+    /// The query and processing run on a background thread,
+    /// only the results are applied on the main thread.
     pub fn refresh(&mut self, cx: &mut Context<Self>) {
         if self.refreshing {
             self.refresh_dirty = true;
@@ -231,11 +249,11 @@ impl RepoStore {
         self.tasks.push(task);
     }
 
-    /// One query + apply cycle (debounced entry point).
     fn run_refresh(&mut self, cx: &mut Context<Self>) {
         self.refreshing = true;
 
-        let client = Backend::global(cx).read(cx).client();
+        let backend = Backend::global(cx);
+        let client = backend.read(cx).client();
         let addr = self.addr.clone();
 
         let work = cx.background_spawn(async move {
@@ -285,13 +303,15 @@ impl RepoStore {
             // NIP-22 comments reference their root via an `E`/`e` tag rather
             // than the repository's `a` tag, so query them by the root events
             // of this repository.
-            let db = client.database();
             let mut seen_comments: HashSet<EventId> = comments.iter().map(|e| e.id).collect();
+            let db = client.database();
+
             let roots = issues
                 .iter()
                 .chain(&patches)
                 .chain(&pull_requests)
                 .map(|e| e.id);
+
             for filter in filters::comments_for(roots) {
                 for event in db.query(filter).await? {
                     if seen_comments.insert(event.id) {
@@ -300,16 +320,17 @@ impl RepoStore {
                 }
             }
 
-            // Status events may omit their `a` tag (NIP-34 makes it
-            // optional), so also query them by the root events they
-            // reference.
-            let db = client.database();
+            // Status events may omit their `a` tag,
+            // so also query them by the root events they reference.
             let mut seen_statuses: HashSet<EventId> = statuses.iter().map(|e| e.id).collect();
+            let db = client.database();
+
             let roots = issues
                 .iter()
                 .chain(&patches)
                 .chain(&pull_requests)
                 .map(|e| e.id);
+
             for root in roots {
                 for event in db.query(filters::statuses_for([root])).await? {
                     if seen_statuses.insert(event.id) {
@@ -318,17 +339,18 @@ impl RepoStore {
                 }
             }
 
-            // Cover notes (1624) and label events (1985) reference their
-            // target via an `e` tag, so query them per root like comments
-            // and statuses.
-            let db = client.database();
+            // Cover notes (1624) and label events (1985) reference
+            // so query them per root like comments and statuses.
             let mut seen_cover_notes: HashSet<EventId> = cover_notes.iter().map(|e| e.id).collect();
             let mut seen_labels: HashSet<EventId> = labels.iter().map(|e| e.id).collect();
+            let db = client.database();
+
             let roots = issues
                 .iter()
                 .chain(&patches)
                 .chain(&pull_requests)
                 .map(|e| e.id);
+
             for root in roots {
                 for event in db.query(filters::annotations_for([root])).await? {
                     if deletions.is_deleted(&event) {
@@ -356,12 +378,15 @@ impl RepoStore {
                 .as_ref()
                 .map(Announcement::effective_maintainers)
                 .unwrap_or_default();
+
             let status_by_root =
                 resolve_statuses(&issues, &patches, &pull_requests, &statuses, &maintainers);
+
             let open_issue_count = issues
                 .iter()
                 .filter(|issue| status_of(&status_by_root, issue) == RepoStatus::Open)
                 .count();
+
             let open_pr_count = pull_requests
                 .iter()
                 .filter(|pr| {
@@ -414,8 +439,8 @@ impl RepoStore {
             let again = this.update(cx, |this, cx| {
                 this.announcement = announcement;
 
-                // The announcement may list relays for this repository's
-                // activity; connect to any we haven't fetched from yet.
+                // The announcement may list relays for this repository's activity,
+                // connect to any we haven't fetched from yet.
                 let relays = this
                     .announcement
                     .as_ref()
@@ -450,11 +475,13 @@ impl RepoStore {
                     .chain(&this.pull_requests)
                     .map(|e| e.id)
                     .collect::<HashSet<EventId>>();
+
                 let new_roots: Vec<EventId> = roots
                     .iter()
                     .filter(|id| !this.root_fetches.contains(id))
                     .copied()
                     .collect();
+
                 if !new_roots.is_empty() {
                     this.root_fetches.extend(new_roots.iter().copied());
                     // Batch the per-root filters: one statuses filter and one
@@ -464,6 +491,7 @@ impl RepoStore {
                     let mut root_filters = filters::comments_for(new_roots.clone());
                     root_filters.push(filters::statuses_for(new_roots.iter().copied()));
                     root_filters.push(filters::annotations_for(new_roots));
+
                     let announced: Vec<RelayUrl> = this.repo_relays.iter().cloned().collect();
                     let backend = Backend::global(cx);
                     backend.update(cx, |backend, cx| {
@@ -483,8 +511,7 @@ impl RepoStore {
                 }
             })?;
 
-            // Requests that arrived while the refresh was running are
-            // coalesced into one follow-up refresh.
+            // Requests that arrived while the refresh was running are coalesced into one follow-up refresh.
             if again {
                 this.update(cx, |this, cx| this.refresh(cx))?;
             }
@@ -493,21 +520,19 @@ impl RepoStore {
         }));
     }
 
-    /// Resolve the status of a root event (issue / patch / PR) per NIP-34:
-    /// a lookup into the map built on the last refresh.
+    /// Resolve the status of a root event (issue / patch / PR) per NIP-34
     pub fn status_of(&self, root: &Event) -> RepoStatus {
         status_of(&self.status_by_root, root)
     }
 
-    /// Refresh generation, incremented on every applied refresh. Views use
-    /// it to key their derived-data caches (filtered lists, counts) so
-    /// renders that change nothing stay O(1).
+    /// Refresh generation, incremented on every applied refresh.
+    /// Views use it to key their derived-data caches.
     pub fn version(&self) -> u64 {
         self.version
     }
 
-    /// The effective cover note of `root` (kind 1624), if any: the latest
-    /// note authored by the root author or a maintainer.
+    /// The effective cover note of `root` (kind 1624), if any:
+    /// the latest note authored by the root author or a maintainer.
     pub fn cover_note_of(&self, root: &Event) -> Option<&Event> {
         let maintainers = self
             .announcement
@@ -545,14 +570,13 @@ impl RepoStore {
 
     /// Number of open issues: issues whose resolved status is
     /// [`RepoStatus::Open`] (issues without status events default to open).
-    /// Cached on the last refresh.
     pub fn issue_count(&self) -> usize {
         self.open_issue_count
     }
 
     /// Number of open pull requests: root PR events (not PR updates, whose
     /// status is carried by the root) with a resolved status of
-    /// [`RepoStatus::Open`]. Cached on the last refresh.
+    /// [`RepoStatus::Open`].
     pub fn pull_request_count(&self) -> usize {
         self.open_pr_count
     }
@@ -584,15 +608,13 @@ impl RepoStore {
             .filter(move |e| signed_core::references_root(e, root))
     }
 
-    /// Comment on a root event (issue / PR) per NIP-34 (kind 1111), using
-    /// the SDK's NIP-22 `CommentBuilder` so other NIP-34 clients (ngit,
-    /// GitWorkshop) can thread the comment.
+    /// Comment on a root event (issue / PR) per NIP-34 (kind 1111)
     pub fn comment(&mut self, root: &Event, content: String, cx: &mut Context<Self>) {
         self.reply(root, None, content, cx);
     }
 
-    /// Reply to `parent` (a comment on `root`) with a NIP-22 threaded
-    /// comment; `None` publishes a top-level comment on the root itself.
+    /// Reply to `parent` (a comment on `root`) with a NIP-22 threaded comment,
+    /// `None` publishes a top-level comment on the root itself.
     pub fn reply(
         &mut self,
         root: &Event,
@@ -617,23 +639,60 @@ impl RepoStore {
     /// (kind 1617) carrying the `git format-patch` output, which the PR
     /// references via an `e` tag (NIP-34).
     ///
-    /// The patch is published first so the PR can reference its id. The
-    /// proposed commit is parsed from the patch's `From <commit>` header;
-    /// without one publishing is refused, because the PR's `c` tag must
-    /// carry a real commit id for other NIP-34 clients to verify and apply
-    /// the proposal. The `clone` tag carries the announced mirror URLs; the
-    /// linked patch is the source of truth until the commit is pushed there.
+    /// The patch series is published first (one kind-1617 event per commit,
+    /// chained with NIP-10 `e` replies, each under [`MAX_PATCH_EVENT_BYTES`])
+    /// so the PR can reference the root patch's id. The proposed commit is
+    /// parsed from the series' last `From <commit>` header (the tip); without
+    /// one publishing is refused, because the PR's `c` tag must carry a real
+    /// commit id for other NIP-34 clients to verify and apply the proposal.
+    /// The `clone` tag carries the announced mirror URLs, and when
+    /// `push_from` is set the tip is pushed to those servers under
+    /// `refs/nostr/<event-id>` (best-effort) before the PR is published, so
+    /// the commit is actually downloadable there; the linked patch stays the
+    /// source of truth either way.
+    ///
+    /// `branch_name` lands in the PR's `branch-name` tag (NIP-34); `draft`
+    /// publishes a kind-1633 status right after the PR event. `merge_base`
+    /// is the hex commit the proposed branch forked from, computed from a
+    /// local checkout when the patch was generated there.
+    #[allow(clippy::too_many_arguments)]
     pub fn open_pull_request(
         &mut self,
         subject: Option<String>,
         description: String,
+        branch_name: Option<String>,
         patch: String,
+        draft: bool,
+        merge_base: Option<String>,
+        push_from: Option<PathBuf>,
         cx: &mut Context<Self>,
     ) {
         self.last_error = None;
+        self.last_warning = None;
 
-        let Some(current_commit) =
-            patch_current_commit(&patch).and_then(|hex| hex.parse::<bitcoin_hashes::Sha1>().ok())
+        let series: Vec<String> = signed_git::split_patch_series(&patch)
+            .into_iter()
+            .map(str::to_owned)
+            .collect();
+
+        if let Some(oversized) = series
+            .iter()
+            .find(|part| part.len() > MAX_PATCH_EVENT_BYTES)
+        {
+            self.last_error = Some(format!(
+                "patch too large ({} bytes; NIP-34 suggests keeping each patch under {} bytes)",
+                oversized.len(),
+                MAX_PATCH_EVENT_BYTES
+            ));
+            cx.notify();
+            return;
+        }
+
+        // The tip of the series is its last commit; `git format-patch` orders patches oldest first.
+        let Some(current_commit) = series
+            .last()
+            .and_then(|part| patch_current_commit(part))
+            .and_then(|hex| hex.parse::<Sha1Hash>().ok())
         else {
             self.last_error = Some(
                 "Patch must be `git format-patch` output with a `From <commit-id>` header".into(),
@@ -642,35 +701,43 @@ impl RepoStore {
             return;
         };
 
-        let Ok(root_marker) = Tag::parse(["t", "root"]) else {
-            return;
-        };
-        let commit_hex = current_commit.to_string();
-        let mut patch_tags = vec![
-            Tag::coordinate(self.addr.clone(), None),
-            Tag::public_key(self.addr.public_key),
-            root_marker,
-        ];
-        // NIP-34: the `r` EUC tag lets clients subscribe to all patches of
-        // this repository; `commit`/`r` tags reference the proposed commit.
-        if let Some(euc) = self.announcement.as_ref().and_then(|a| a.euc.clone())
-            && let Ok(tag) = Tag::parse(["r", &euc])
-        {
-            patch_tags.push(tag);
-        }
-        if let Ok(tag) = Tag::parse(["commit", &commit_hex]) {
-            patch_tags.push(tag);
-        }
-        if let Ok(tag) = Tag::parse(["r", &commit_hex]) {
-            patch_tags.push(tag);
-        }
-        let patch_builder = EventBuilder::new(Kind::GitPatch, patch).tags(patch_tags);
+        let backend = Backend::global(cx);
+        let signer = backend.read(cx).signer();
 
-        let patch_task =
-            Backend::global(cx).update(cx, |backend, cx| backend.send(patch_builder, cx));
+        if backend.read(cx).current_user().is_none() {
+            self.last_error = Some("Sign in to open a pull request".into());
+            cx.notify();
+            return;
+        }
+
+        let addr = self.addr.clone();
+        let owner = self.addr.public_key;
+        let euc = self.announcement.as_ref().and_then(|a| a.euc.clone());
+
+        let (push_owner, push_repo_id, push_relays) = self
+            .announcement
+            .as_ref()
+            .map(|a| {
+                let owner = a.owner.to_bech32().unwrap_or_else(|_| a.owner.to_hex());
+                (owner, a.id.clone(), a.relays.clone())
+            })
+            .unwrap_or_default();
 
         self.tasks.push(cx.spawn(async move |this, cx| {
-            let patch_event = match patch_task.await {
+            // The PR references the root patch event so viewers can find
+            // the patch without carrying it inline.
+            let root_patch = match publish_patch_series(
+                &this,
+                cx,
+                &addr,
+                owner,
+                euc.as_deref(),
+                &series,
+                "root",
+                None,
+            )
+            .await
+            {
                 Ok(event) => event,
                 Err(e) => {
                     return this.update(cx, |this, cx| {
@@ -680,33 +747,225 @@ impl RepoStore {
                 }
             };
 
-            // The PR references the patch event so viewers can find the
-            // patch without carrying it inline.
-            let pr_task = this.update(cx, |this, cx| {
+            let builder = this.update(cx, |this, _cx| {
                 let builder = GitPullRequest {
                     repository: this.addr.clone(),
                     content: description,
                     subject,
                     labels: Vec::new(),
-                    branch_name: None,
-                    // NIP-34: PRs carry at least one clone URL where the
-                    // tip commit can be downloaded; use the repository's
-                    // announced mirrors until a push backend exists.
+                    branch_name,
+                    // NIP-34: PRs carry at least one clone URL where the tip commit can be downloaded,
+                    // the announced mirrors are also the servers the tip is pushed to below.
                     clone: this
                         .announcement
                         .as_ref()
                         .map(|a| a.clone.clone())
                         .unwrap_or_default(),
                     current_commit,
-                    root_patch_event: Some(patch_event.id),
+                    root_patch_event: Some(root_patch.id),
+                    merge_base: merge_base
+                        .and_then(|hex| hex.parse::<bitcoin_hashes::Sha1>().ok()),
+                }
+                .into_event_builder();
+
+                // NIP-34: the `r` EUC tag lets clients subscribe to all PRs of this repository
+                match this.announcement.as_ref().and_then(|a| a.euc.clone()) {
+                    Some(euc) => builder.tag(Tag::parse(["r", &euc]).expect("valid r tag")),
+                    None => builder,
+                }
+            })?;
+
+            // Sign before publishing so the tip can be pushed to the grasp
+            // servers under `refs/nostr/<event-id>` (nak's convention):
+            // readers fetch that ref to get the commit behind the `c` tag.
+            let event = cx
+                .background_spawn({
+                    let signer = signer.clone();
+                    async move { builder.finalize_async(&signer).await }
+                })
+                .await?;
+
+            if let Some(path) = push_from.as_ref() {
+                let tip = current_commit.to_string();
+                let reference = format!("refs/nostr/{}", event.id.to_hex());
+                let (pushed, failures) = cx
+                    .background_spawn({
+                        let path = path.clone();
+                        let tip = tip.clone();
+                        let reference = reference.clone();
+                        let owner = push_owner.clone();
+                        let repo_id = push_repo_id.clone();
+                        let relays = push_relays.clone();
+                        async move {
+                            let mut failures = Vec::new();
+                            let mut pushed = 0;
+                            for relay in &relays {
+                                let Some(base) = grasp_base_url(relay) else {
+                                    continue;
+                                };
+                                let url = format!("{base}/{owner}/{repo_id}.git");
+                                match signed_git::push_commit_ref(&path, &url, &tip, &reference) {
+                                    Ok(()) => pushed += 1,
+                                    Err(e) => failures.push(format!("{relay}: {e}")),
+                                }
+                            }
+                            (pushed, failures)
+                        }
+                    })
+                    .await;
+
+                if pushed == 0 {
+                    this.update(cx, |this, cx| {
+                        this.last_warning = Some(format!(
+                            "Pull request published, but the commit could not be pushed to any grasp server ({}); the patch is still the source of truth",
+                            failures.join("; ")
+                        ));
+                        cx.notify();
+                    })?;
+                }
+            }
+
+            let publish_task = this.update(cx, |_this, cx| {
+                let backend = Backend::global(cx);
+                backend.update(cx, |backend, cx| backend.publish_event(event, cx))
+            })?;
+
+            let pr_event = match publish_task.await {
+                Ok(event) => event,
+                Err(e) => {
+                    return this.update(cx, |this, cx| {
+                        this.last_error = Some(e.to_string());
+                        cx.notify();
+                    });
+                }
+            };
+
+            // NIP-34: a draft PR carries a kind-1633 status event,
+            // publish it right after the PR event so viewers never show it open.
+            if draft {
+                this.update(cx, |this, cx| {
+                    this.set_status(&pr_event, RepoStatus::Draft, cx);
+                })?;
+            }
+
+            Ok(())
+        }));
+    }
+
+    /// Update a pull request: publish revision patch events chained to the
+    /// original root patch (`t root-revision` and a NIP-10 `e` reply on the
+    /// first, per NIP-34), then a kind-1619 PR update event carrying the new tip.
+    ///
+    /// Only the PR author may update it; other authors must open a new PR.
+    pub fn update_pull_request(&mut self, root: &Event, patch: String, cx: &mut Context<Self>) {
+        self.last_error = None;
+        self.last_warning = None;
+
+        let backend = Backend::global(cx);
+
+        let Some(user) = backend.read(cx).current_user() else {
+            self.last_error = Some("Sign in to update the pull request".into());
+            cx.notify();
+            return;
+        };
+
+        if user != root.pubkey {
+            self.last_error = Some("Only the pull request author can update it".into());
+            cx.notify();
+            return;
+        }
+
+        let series: Vec<String> = signed_git::split_patch_series(&patch)
+            .into_iter()
+            .map(str::to_owned)
+            .collect();
+        if let Some(oversized) = series
+            .iter()
+            .find(|part| part.len() > MAX_PATCH_EVENT_BYTES)
+        {
+            self.last_error = Some(format!(
+                "patch too large ({} bytes; NIP-34 suggests keeping each patch under {} bytes)",
+                oversized.len(),
+                MAX_PATCH_EVENT_BYTES
+            ));
+            cx.notify();
+            return;
+        }
+
+        // The new tip of the PR is the last commit of the series.
+        let Some(current_commit) = series
+            .last()
+            .and_then(|part| patch_current_commit(part))
+            .and_then(|hex| hex.parse::<Sha1Hash>().ok())
+        else {
+            self.last_error = Some(
+                "Patch must be `git format-patch` output with a `From <commit-id>` header".into(),
+            );
+            cx.notify();
+            return;
+        };
+
+        // NIP-34: the first patch of a revision replies to the original
+        // root patch (the PR's `e` tag; fall back to the oldest patch of
+        // the linked set for PRs without one).
+        let root_patch_id = root.tags.event_ids().next().or_else(|| {
+            pull_request_patches(root, self.patches.iter())
+                .first()
+                .map(|p| p.id)
+        });
+
+        let addr = self.addr.clone();
+        let owner = self.addr.public_key;
+        let euc = self.announcement.as_ref().and_then(|a| a.euc.clone());
+        let root = root.clone();
+        let clone: Vec<Url> = self
+            .announcement
+            .as_ref()
+            .map(|a| a.clone.clone())
+            .unwrap_or_default();
+
+        self.tasks.push(cx.spawn(async move |this, cx| {
+            if let Err(e) = publish_patch_series(
+                &this,
+                cx,
+                &addr,
+                owner,
+                euc.as_deref(),
+                &series,
+                "root-revision",
+                root_patch_id,
+            )
+            .await
+            {
+                return this.update(cx, |this, cx| {
+                    this.last_error = Some(e.to_string());
+                    cx.notify();
+                });
+            }
+
+            let update_task = this.update(cx, |this, cx| {
+                let builder = GitPullRequestUpdate {
+                    repository: this.addr.clone(),
+                    pull_request_event: root.id,
+                    pull_request_author: root.pubkey,
+                    current_commit,
+                    clone: clone.clone(),
                     merge_base: None,
                 }
                 .into_event_builder();
 
-                Backend::global(cx).update(cx, |backend, cx| backend.send(builder, cx))
+                // NIP-34: the `r` EUC tag lets clients subscribe to all PR
+                // updates of this repository; the SDK builder omits it.
+                let builder = match euc.as_deref() {
+                    Some(euc) => builder.tag(Tag::parse(["r", euc]).expect("valid r tag")),
+                    None => builder,
+                };
+
+                let backend = Backend::global(cx);
+                backend.update(cx, |backend, cx| backend.send(builder, cx))
             })?;
 
-            if let Err(e) = pr_task.await {
+            if let Err(e) = update_task.await {
                 return this.update(cx, |this, cx| {
                     this.last_error = Some(e.to_string());
                     cx.notify();
@@ -729,7 +988,8 @@ impl RepoStore {
             .map(Announcement::effective_maintainers)
             .unwrap_or_default();
 
-        let Some(user) = Backend::global(cx).read(cx).current_user() else {
+        let backend = Backend::global(cx);
+        let Some(user) = backend.read(cx).current_user() else {
             self.last_error = Some("Sign in to change the status".into());
             cx.notify();
             return;
@@ -761,7 +1021,8 @@ impl RepoStore {
     pub fn publish_state(&mut self, cx: &mut Context<Self>) {
         self.last_error = None;
 
-        let Some(user) = Backend::global(cx).read(cx).current_user() else {
+        let backend = Backend::global(cx);
+        let Some(user) = backend.read(cx).current_user() else {
             self.last_error = Some("Sign in to publish repository state".into());
             cx.notify();
             return;
@@ -808,7 +1069,10 @@ impl RepoStore {
 
     /// Merge a pull request: apply its patch (the content of the linked
     /// root patch event) to the local clone of this repository, then publish
-    /// the merged status.
+    /// a kind-1631 (Applied) status event with merge provenance: the commits
+    /// `git am` created (`applied-as-commits` + `r` tags) and the applied
+    /// patch events (`q` tags, plus `e` reply tags for every patch beyond
+    /// the root, per NIP-34).
     ///
     /// Only the repository author may merge. The clone is created on demand
     /// from the announcement's clone URLs when needed. Patch application
@@ -816,6 +1080,7 @@ impl RepoStore {
     /// no longer applies) surface in [`Self::last_error`].
     pub fn merge_pull_request(&mut self, root: &Event, cx: &mut Context<Self>) {
         self.last_error = None;
+        self.last_warning = None;
 
         let is_author = Backend::global(cx)
             .read(cx)
@@ -834,21 +1099,46 @@ impl RepoStore {
             .map(|a| a.clone.iter().map(ToString::to_string).collect())
             .unwrap_or_default();
         let patch = pull_request_patch(root, self.patches.iter());
+        // The applied patch events, for the status tags below.
+        let patches: Vec<Event> = pull_request_patches(root, self.patches.iter())
+            .into_iter()
+            .cloned()
+            .collect();
+        let relay_hint = self
+            .announcement
+            .as_ref()
+            .and_then(|a| a.relays.first())
+            .map(ToString::to_string)
+            .unwrap_or_default();
+        let euc = self.announcement.as_ref().and_then(|a| a.euc.clone());
         let root = root.clone();
 
         let apply = cx.background_spawn(async move {
             let repo = cache.ensure_clone(&addr, &clone_urls)?;
             let workdir = repo
                 .workdir()
-                .ok_or_else(|| anyhow::anyhow!("repository has no worktree"))?;
-            signed_git::apply_patch(workdir, &patch)
+                .ok_or_else(|| anyhow::anyhow!("repository has no worktree"))?
+                .to_path_buf();
+            // The commits created by the apply: everything between the
+            // previous HEAD and the new one, oldest first.
+            let previous = signed_git::head_commit_id(&workdir)?;
+            signed_git::apply_patch(&workdir, &patch)?;
+            let applied = signed_git::commits_since(&workdir, previous.as_deref())?;
+            Ok::<_, Error>(applied)
         });
 
         self.tasks.push(cx.spawn(async move |this, cx| {
             match apply.await {
-                Ok(()) => {
+                Ok(applied) => {
                     this.update(cx, |this, cx| {
-                        this.set_status(&root, RepoStatus::Applied, cx);
+                        this.publish_applied_status(
+                            &root,
+                            &patches,
+                            &applied,
+                            &relay_hint,
+                            euc.as_deref(),
+                            cx,
+                        );
                     })?;
                 }
                 Err(e) => {
@@ -862,6 +1152,62 @@ impl RepoStore {
         }));
     }
 
+    /// Publish a kind-1631 (Applied) status event for `root` after a merge:
+    /// `applied-as-commits` + `r` tags for the commits `git am` created,
+    /// `q` tags for the applied patch events, and `e` reply tags for every
+    /// patch of the series beyond the root (NIP-34).
+    fn publish_applied_status(
+        &mut self,
+        root: &Event,
+        patches: &[Event],
+        applied: &[String],
+        relay_hint: &str,
+        euc: Option<&str>,
+        cx: &mut Context<Self>,
+    ) {
+        let mut tags = vec![
+            Tag::parse(["e", &root.id.to_hex(), "", "root"]).expect("valid root tag"),
+            Tag::public_key(self.addr.public_key),
+            Tag::public_key(root.pubkey),
+            Tag::coordinate(self.addr.clone(), None),
+        ];
+        if let Some(euc) = euc
+            && let Ok(tag) = Tag::parse(["r", euc])
+        {
+            tags.push(tag);
+        }
+        // The applied patch events: a `q` tag per event, plus an `e` reply
+        // for every event beyond the root (chain parts and revisions), so
+        // their statuses resolve to Applied too.
+        for (ix, patch) in patches.iter().enumerate() {
+            if let Ok(tag) =
+                Tag::parse(["q", &patch.id.to_hex(), relay_hint, &patch.pubkey.to_hex()])
+            {
+                tags.push(tag);
+            }
+            if ix > 0
+                && let Ok(tag) = Tag::parse(["e", &patch.id.to_hex(), "", "reply"])
+            {
+                tags.push(tag);
+            }
+        }
+        // The commits `git am` created on top of the previous HEAD.
+        if !applied.is_empty() {
+            let mut applied_tag = vec!["applied-as-commits".to_string()];
+            applied_tag.extend(applied.iter().cloned());
+            if let Ok(tag) = Tag::parse(applied_tag) {
+                tags.push(tag);
+            }
+            for commit in applied {
+                if let Ok(tag) = Tag::parse(["r", commit]) {
+                    tags.push(tag);
+                }
+            }
+        }
+
+        self.send(EventBuilder::new(Kind::GitStatusApplied, "").tags(tags), cx);
+    }
+
     fn send(&mut self, builder: EventBuilder, cx: &mut Context<Self>) {
         self.last_error = None;
 
@@ -924,7 +1270,8 @@ fn resolve_statuses(
         .chain(pull_requests)
         .map(|root| {
             let events = by_root.get(&root.id).map(Vec::as_slice).unwrap_or(&[]);
-            let status = signed_core::resolve_status(events.iter().copied(), &root.pubkey, maintainers);
+            let status =
+                signed_core::resolve_status(events.iter().copied(), &root.pubkey, maintainers);
             (root.id, status)
         })
         .collect()
@@ -946,6 +1293,78 @@ fn patch_current_commit(patch: &str) -> Option<&str> {
     hex.split_whitespace().next().filter(|hex| hex.len() == 40)
 }
 
+/// Publish a `git format-patch` series as chained kind-1617 events and
+/// return the root event (the one a PR references). The first part carries
+/// `first_marker` (`t root`, or `t root-revision` with an `e` reply to
+/// `reply_to` for revisions); every later part replies to the previous one
+/// (NIP-34). Every part gets the repository coordinate, the owner, its own
+/// `commit`/`r` tags, and the repository EUC when known.
+#[allow(clippy::too_many_arguments)]
+async fn publish_patch_series(
+    this: &WeakEntity<RepoStore>,
+    cx: &mut AsyncApp,
+    addr: &RepoAddr,
+    owner: PublicKey,
+    euc: Option<&str>,
+    series: &[String],
+    first_marker: &str,
+    reply_to: Option<EventId>,
+) -> Result<Event, Error> {
+    let mut root: Option<Event> = None;
+    let mut previous = reply_to;
+
+    for (ix, part) in series.iter().enumerate() {
+        let Some(commit) = patch_current_commit(part).filter(|hex| hex.len() == 40) else {
+            return Err(anyhow::anyhow!(
+                "patch {} of the series has no `From <commit-id>` header",
+                ix + 1
+            ));
+        };
+
+        let mut tags = vec![Tag::coordinate(addr.clone(), None), Tag::public_key(owner)];
+        if ix == 0 {
+            if let Ok(tag) = Tag::parse(["t", first_marker]) {
+                tags.push(tag);
+            }
+            if let Some(root_id) = reply_to
+                && let Ok(tag) = Tag::parse(["e", &root_id.to_hex(), "", "reply"])
+            {
+                tags.push(tag);
+            }
+        } else if let Some(previous) = previous
+            && let Ok(tag) = Tag::parse(["e", &previous.to_hex(), "", "reply"])
+        {
+            tags.push(tag);
+        }
+        if let Some(euc) = euc
+            && let Ok(tag) = Tag::parse(["r", euc])
+        {
+            tags.push(tag);
+        }
+        if let Ok(tag) = Tag::parse(["commit", commit]) {
+            tags.push(tag);
+        }
+        if let Ok(tag) = Tag::parse(["r", commit]) {
+            tags.push(tag);
+        }
+
+        let builder = EventBuilder::new(Kind::GitPatch, part.clone()).tags(tags);
+
+        let task = this.update(cx, |_this, cx| {
+            let backend = Backend::global(cx);
+            backend.update(cx, |backend, cx| backend.send(builder, cx))
+        })?;
+        let event = task.await?;
+
+        if root.is_none() {
+            root = Some(event.clone());
+        }
+        previous = Some(event.id);
+    }
+
+    root.ok_or_else(|| anyhow::anyhow!("patch series is empty"))
+}
+
 /// Build a NIP-22 kind-1111 comment: uppercase `E`/`K`/`P` tags scope the
 /// thread root, lowercase `e`/`k`/`p` the direct parent (or the root for a
 /// top-level comment). An `a` tag with the repository coordinate (not part

crates/signed_state/src/repo_list.rs

@@ -202,7 +202,8 @@ impl RepoListStore {
     fn run_refresh(&mut self, cx: &mut Context<Self>) {
         self.refreshing = true;
 
-        let client = Backend::global(cx).read(cx).client();
+        let backend = Backend::global(cx);
+        let client = backend.read(cx).client();
         let author = self.author;
 
         let work = cx.background_spawn(async move {

crates/signed_ui/src/status_badge.rs

@@ -10,11 +10,11 @@ use signed_core::RepoStatus;
 pub fn status_badge(status: RepoStatus, cx: &App) -> AnyElement {
     let (icon, label, tooltip, bg, fg) = match status {
         RepoStatus::Open => (
-            CustomIconName::GitIssueDone,
+            CustomIconName::GitIssueOpen,
             "open",
             "Issue is open",
-            cx.theme().primary,
-            cx.theme().primary_foreground,
+            cx.theme().secondary,
+            cx.theme().secondary_foreground,
         ),
         RepoStatus::Closed => (
             CustomIconName::GitIssueClosed,
@@ -31,11 +31,11 @@ pub fn status_badge(status: RepoStatus, cx: &App) -> AnyElement {
             cx.theme().accent_foreground,
         ),
         RepoStatus::Applied => (
-            CustomIconName::GitIssueOpen,
+            CustomIconName::GitIssueDone,
             "applied",
             "Issue is completed",
-            cx.theme().secondary,
-            cx.theme().secondary_foreground,
+            cx.theme().primary,
+            cx.theme().primary_foreground,
         ),
     };
 

crates/workspace/src/views/mod.rs

@@ -3,5 +3,6 @@ mod repo_list;
 pub(crate) mod sidebar;
 
 pub use repo_detail::RepoDetailView;
+pub(crate) use repo_detail::open_repo_panel;
 pub use repo_list::RepoListView;
 pub use sidebar::SidebarPanel;

crates/workspace/src/views/repo_detail/about.rs

@@ -60,6 +60,7 @@ fn announcement_rows(announcement: &Announcement, cx: &App) -> AnyElement {
             cx,
         ));
     }
+
     if let Some(euc) = &announcement.euc {
         rows.push(row(
             "Earliest Commit",
@@ -67,13 +68,11 @@ fn announcement_rows(announcement: &Announcement, cx: &App) -> AnyElement {
             cx,
         ));
     }
+
     if let Some(upstream) = &announcement.upstream {
-        rows.push(row(
-            "Upstream",
-            text(SharedString::from(upstream.clone())),
-            cx,
-        ));
+        rows.push(row("Upstream", text(upstream.display()), cx));
     }
+
     if !announcement.hashtags.is_empty() {
         rows.push(row(
             "Hashtags",
@@ -81,6 +80,7 @@ fn announcement_rows(announcement: &Announcement, cx: &App) -> AnyElement {
             cx,
         ));
     }
+
     if !announcement.clone.is_empty() {
         rows.push(row(
             "Clone URLs",
@@ -92,6 +92,7 @@ fn announcement_rows(announcement: &Announcement, cx: &App) -> AnyElement {
             cx,
         ));
     }
+
     if !announcement.relays.is_empty() {
         rows.push(row(
             "Grasp Relays",
@@ -103,6 +104,7 @@ fn announcement_rows(announcement: &Announcement, cx: &App) -> AnyElement {
             cx,
         ));
     }
+
     if !announcement.maintainers.is_empty() {
         rows.push(row(
             "Maintainers",

crates/workspace/src/views/repo_detail/commits.rs

@@ -1,5 +1,5 @@
 use gpui::prelude::*;
-use gpui::{AnyElement, App, Context, WeakEntity, div, px};
+use gpui::{AnyElement, App, Context, Window, div, px};
 use gpui_component::scroll::Scrollbar;
 use gpui_component::spinner::Spinner;
 use gpui_component::{ActiveTheme, Sizable, h_flex, v_flex, v_virtual_list};
@@ -12,17 +12,12 @@ use super::RepoDetailView;
 /// Height of one commit row in the virtual list.
 pub(super) const COMMIT_ROW_HEIGHT: f32 = 56.;
 
-/// One row of the commit list: id, summary, author and relative time.
-/// Clicking a row opens the diff of that commit in a new panel.
-fn commit_row(
+pub(super) fn commit_row(
     ix: usize,
     commit: &FileCommit,
-    view: &WeakEntity<RepoDetailView>,
+    on_click: impl Fn(&mut Window, &mut App) + 'static,
     cx: &App,
 ) -> AnyElement {
-    let view = view.clone();
-    let id = commit.id.clone();
-
     h_flex()
         .id(ix)
         .px_4()
@@ -70,11 +65,7 @@ fn commit_row(
                         .child(relative_time_secs(commit.time)),
                 ),
         )
-        .on_click(move |_event, window, cx| {
-            if let Some(view) = view.upgrade() {
-                view.update(cx, |this, cx| this.open_commit_diff(&id, window, cx));
-            }
-        })
+        .on_click(move |_event, window, cx| on_click(window, cx))
         .into_any_element()
 }
 
@@ -114,22 +105,34 @@ impl RepoDetailView {
             .w_full()
             .min_h_0()
             .child(
-                v_virtual_list(
-                    view,
-                    "repo-commits",
-                    sizes,
-                    move |this, range, _window, cx| {
-                        let commits = this
-                            .all_commits
-                            .as_ref()
-                            .map(|list| list.commits.as_slice())
-                            .unwrap_or(&[]);
-                        let view = cx.entity().downgrade();
-                        range
-                            .map(|ix| commit_row(ix, &commits[ix], &view, cx))
-                            .collect()
-                    },
-                )
+                v_virtual_list(view, "commits", sizes, move |this, range, _window, cx| {
+                    let view = cx.entity().downgrade();
+                    let commits = this
+                        .all_commits
+                        .as_ref()
+                        .map(|list| list.commits.as_slice())
+                        .unwrap_or(&[]);
+
+                    range
+                        .map(|ix| {
+                            let id = commits[ix].id.clone();
+                            let view = view.clone();
+
+                            commit_row(
+                                ix,
+                                &commits[ix],
+                                move |window, cx| {
+                                    if let Some(view) = view.upgrade() {
+                                        view.update(cx, |this, cx| {
+                                            this.open_commit_diff(&id, window, cx)
+                                        });
+                                    }
+                                },
+                                cx,
+                            )
+                        })
+                        .collect()
+                })
                 .track_scroll(&scroll_handle)
                 .size_full(),
             )

crates/workspace/src/views/repo_detail/diff.rs

@@ -28,22 +28,13 @@ use super::helpers::{
 /// Width of the changed-files column.
 const TREE_WIDTH: f32 = 260.;
 
-/// Detail panel showing the diff of one commit.
-pub struct CommitDiffView {
-    focus_handle: FocusHandle,
-    /// Local clone the commit lives in.
-    worktree: PathBuf,
-    /// Display name of the repository the commit belongs to.
-    repo_name: SharedString,
-    /// The commit being shown (header and tab title). Starts as an id-only
-    /// stub; [`Self::load`] replaces it with the full metadata, which the
-    /// history list intentionally omits.
-    commit: FileCommit,
-    /// Loaded diff; `None` while loading or after a failure.
+/// The tree + per-file diff body shared by the commit diff panel and the
+/// compare view of the new-pull-request panel. Owns the changed-files
+/// explorer and the virtual list of the selected file's hunks; the host
+/// feeds it a [`CommitDiff`] via [`DiffPane::set_diff`].
+pub struct DiffPane {
+    /// Loaded diff; `None` until [`Self::set_diff`] is called.
     diff: Option<CommitDiff>,
-    /// The diff is being computed on a background task.
-    loading: bool,
-    error: Option<SharedString>,
     /// Changed-files explorer state.
     tree_state: Entity<TreeState>,
     /// Path of the file whose diff is shown in the detail column.
@@ -55,114 +46,60 @@ pub struct CommitDiffView {
     item_sizes: Rc<Vec<Size<Pixels>>>,
     /// Virtual list state of the diff rows.
     scroll_handle: VirtualListScrollHandle,
-    /// In-flight tasks; pruned on every push (see [`helpers::track`]).
-    tasks: Vec<gpui::Task<Result<(), anyhow::Error>>>,
 }
 
-impl CommitDiffView {
-    pub fn new(
-        worktree: PathBuf,
-        repo_name: SharedString,
-        commit_id: String,
-        window: &mut Window,
-        cx: &mut Context<Self>,
-    ) -> Self {
-        let tree_state = cx.new(|cx| TreeState::new(cx));
-
-        // Defer until the window is ready, like the repository detail view.
-        cx.defer_in(window, |this, window, cx| {
-            this.load(window, cx);
-        });
-
+impl DiffPane {
+    pub fn new(cx: &mut Context<Self>) -> Self {
         Self {
-            focus_handle: cx.focus_handle(),
-            worktree,
-            repo_name,
-            commit: FileCommit {
-                id: commit_id,
-                summary: String::new(),
-                description: None,
-                author: String::new(),
-                time: 0,
-            },
             diff: None,
-            loading: true,
-            error: None,
-            tree_state,
+            tree_state: cx.new(|cx| TreeState::new(cx)),
             selected_file: None,
             rows: Vec::new(),
             item_sizes: Rc::new(Vec::new()),
             scroll_handle: VirtualListScrollHandle::new(),
-            tasks: Vec::new(),
         }
     }
 
-    /// Load the commit diff (and the full commit metadata) on a background
-    /// task and populate the tree.
-    fn load(&mut self, window: &mut Window, cx: &mut Context<Self>) {
-        self.loading = true;
-        self.error = None;
-        cx.notify();
+    /// The loaded diff, for stats and badges in the host's header.
+    pub fn diff(&self) -> Option<&CommitDiff> {
+        self.diff.as_ref()
+    }
 
-        let worktree = self.worktree.clone();
-        let id = self.commit.id.clone();
-
-        let task = cx.spawn_in(window, async move |this, cx| {
-            let commit = cx
-                .background_spawn({
-                    let worktree = worktree.clone();
-                    let id = id.clone();
-                    async move { signed_git::worktree_commit(&worktree, &id) }
-                })
-                .await;
-            let diff = cx
-                .background_spawn({
-                    let worktree = worktree.clone();
-                    let id = id.clone();
-                    async move { signed_git::worktree_commit_diff(&worktree, &id) }
-                })
-                .await;
-
-            this.update_in(cx, |this, _window, cx| {
-                this.loading = false;
-                if let Ok(Some(commit)) = commit {
-                    this.commit = commit;
-                }
-                match diff {
-                    Ok(diff) => {
-                        let mut paths: Vec<PathBuf> = diff
-                            .files
-                            .iter()
-                            .map(|file| PathBuf::from(&file.path))
-                            .collect();
-                        paths.sort();
-                        let items = tree_items(build_tree_items(&paths), true);
-                        let first = diff
-                            .files
-                            .first()
-                            .map(|file| SharedString::from(file.path.as_str()));
-                        this.tree_state.update(cx, |state, cx| {
-                            state.set_items(items.clone(), cx);
-                            let item = find_item(&items, first.as_deref());
-                            state.set_selected_item(item, cx);
-                        });
-                        this.selected_file = first.clone();
-                        this.diff = Some(diff);
-                        if let Some(path) = first {
-                            this.set_diff_rows(path.as_ref());
-                        }
-                    }
-                    Err(error) => {
-                        this.error = Some(error.to_string().into());
-                    }
-                }
-                cx.notify();
-            })?;
-
-            Ok(())
+    /// Replace the diff and rebuild the tree and the selected file's rows.
+    pub fn set_diff(&mut self, diff: CommitDiff, cx: &mut Context<Self>) {
+        let mut paths: Vec<PathBuf> = diff
+            .files
+            .iter()
+            .map(|file| PathBuf::from(&file.path))
+            .collect();
+        paths.sort();
+        let items = tree_items(build_tree_items(&paths), true);
+        let first = diff
+            .files
+            .first()
+            .map(|file| SharedString::from(file.path.as_str()));
+        self.tree_state.update(cx, |state, cx| {
+            state.set_items(items.clone(), cx);
+            let item = find_item(&items, first.as_deref());
+            state.set_selected_item(item, cx);
         });
+        self.selected_file = first.clone();
+        self.diff = Some(diff);
+        if let Some(path) = first {
+            self.set_diff_rows(path.as_ref());
+        }
+    }
 
-        self.tasks.push(task);
+    /// Forget the diff (e.g. when the compared branches changed): clear the
+    /// tree, the selection and the diff rows.
+    pub fn clear(&mut self, cx: &mut Context<Self>) {
+        self.diff = None;
+        self.selected_file = None;
+        self.rows = Vec::new();
+        self.item_sizes = Rc::new(Vec::new());
+        self.tree_state.update(cx, |state, cx| {
+            state.set_items(Vec::new(), cx);
+        });
     }
 
     /// Show the diff of the file at `path` (selected in the tree).
@@ -226,8 +163,8 @@ impl CommitDiffView {
                             .p_2(),
                         )
                     })
-                    .when(self.diff.is_none() && !self.loading, |this| {
-                        this.child(placeholder("Failed to load diff", cx))
+                    .when(self.diff.is_none(), |this| {
+                        this.child(placeholder("No changes", cx))
                     }),
             )
             .into_any_element()
@@ -235,23 +172,12 @@ impl CommitDiffView {
 
     /// Right column: header of the selected file plus its diff.
     fn render_detail_column(&self, cx: &mut Context<Self>) -> AnyElement {
-        if self.loading {
-            return v_flex()
-                .size_full()
-                .items_center()
-                .justify_center()
-                .child(Spinner::new().small())
-                .into_any_element();
-        }
-        if let Some(error) = self.error.clone() {
-            return placeholder(&error, cx);
-        }
         let Some(diff) = self.diff.as_ref() else {
-            return placeholder("Failed to load diff", cx);
+            return placeholder("No changes", cx);
         };
         let Some(path) = self.selected_file.clone() else {
             return if diff.files.is_empty() {
-                placeholder("No files changed in this commit", cx)
+                placeholder("No files changed", cx)
             } else {
                 placeholder("Select a file", cx)
             };
@@ -377,11 +303,126 @@ impl CommitDiffView {
             .child(div().id("commit-diff-body").flex_1().min_h_0().child(body))
             .into_any_element()
     }
+}
+
+impl Render for DiffPane {
+    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        h_flex()
+            .size_full()
+            .min_h_0()
+            .bg(cx.theme().background)
+            .child(self.render_tree_column(cx))
+            .child(self.render_detail_column(cx))
+    }
+}
+
+/// Detail panel showing the diff of one commit: a metadata header plus the
+/// shared [`DiffPane`] body.
+pub struct CommitDiffView {
+    focus_handle: FocusHandle,
+    /// Local clone the commit lives in.
+    worktree: PathBuf,
+    /// Display name of the repository the commit belongs to.
+    repo_name: SharedString,
+    /// The commit being shown (header and tab title). Starts as an id-only
+    /// stub; [`Self::load`] replaces it with the full metadata, which the
+    /// history list intentionally omits.
+    commit: FileCommit,
+    /// The diff is being computed on a background task.
+    loading: bool,
+    error: Option<SharedString>,
+    /// Changed-files explorer and per-file diff, shared with the compare
+    /// view of the new-pull-request panel.
+    pane: Entity<DiffPane>,
+    /// In-flight tasks; pruned on every push (see [`helpers::track`]).
+    tasks: Vec<gpui::Task<Result<(), anyhow::Error>>>,
+}
+
+impl CommitDiffView {
+    pub fn new(
+        worktree: PathBuf,
+        repo_name: SharedString,
+        commit_id: String,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Self {
+        let pane = cx.new(DiffPane::new);
+
+        // Defer until the window is ready, like the repository detail view.
+        cx.defer_in(window, |this, window, cx| {
+            this.load(window, cx);
+        });
+
+        Self {
+            focus_handle: cx.focus_handle(),
+            worktree,
+            repo_name,
+            commit: FileCommit {
+                id: commit_id,
+                summary: String::new(),
+                description: None,
+                author: String::new(),
+                time: 0,
+            },
+            loading: true,
+            error: None,
+            pane,
+            tasks: Vec::new(),
+        }
+    }
+
+    /// Load the commit diff (and the full commit metadata) on a background
+    /// task and populate the tree.
+    fn load(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        self.loading = true;
+        self.error = None;
+        cx.notify();
+
+        let worktree = self.worktree.clone();
+        let id = self.commit.id.clone();
+
+        let task = cx.spawn_in(window, async move |this, cx| {
+            let commit = cx
+                .background_spawn({
+                    let worktree = worktree.clone();
+                    let id = id.clone();
+                    async move { signed_git::worktree_commit(&worktree, &id) }
+                })
+                .await;
+            let diff = cx
+                .background_spawn({
+                    let worktree = worktree.clone();
+                    let id = id.clone();
+                    async move { signed_git::worktree_commit_diff(&worktree, &id) }
+                })
+                .await;
+
+            this.update_in(cx, |this, _window, cx| {
+                this.loading = false;
+                if let Ok(Some(commit)) = commit {
+                    this.commit = commit;
+                }
+                match diff {
+                    Ok(diff) => {
+                        this.pane.update(cx, |pane, cx| pane.set_diff(diff, cx));
+                    }
+                    Err(error) => {
+                        this.error = Some(error.to_string().into());
+                    }
+                }
+                cx.notify();
+            })?;
+
+            Ok(())
+        });
+
+        self.tasks.push(task);
+    }
 
     /// Header: commit id, summary, author/time and overall change stats.
     fn render_header(&self, cx: &mut Context<Self>) -> AnyElement {
         let commit = &self.commit;
-        let (files, insertions, deletions) = self.diff.as_ref().map_or((0, 0, 0), |diff| {
+        let (files, insertions, deletions) = self.pane.read(cx).diff().map_or((0, 0, 0), |diff| {
             (
                 diff.files.len(),
                 diff.files.iter().map(|file| file.insertions).sum(),
@@ -481,6 +522,19 @@ impl Focusable for CommitDiffView {
 
 impl Render for CommitDiffView {
     fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        let body: AnyElement = if self.loading {
+            v_flex()
+                .size_full()
+                .items_center()
+                .justify_center()
+                .child(Spinner::new().small())
+                .into_any_element()
+        } else if let Some(error) = self.error.clone() {
+            placeholder(&error, cx)
+        } else {
+            self.pane.clone().into_any_element()
+        };
+
         v_resizable("commit-diff")
             .child(
                 resizable_panel()
@@ -490,15 +544,6 @@ impl Render for CommitDiffView {
                     .bg(cx.theme().background)
                     .child(self.render_header(cx)),
             )
-            .child(
-                resizable_panel().child(
-                    h_flex()
-                        .size_full()
-                        .min_h_0()
-                        .bg(cx.theme().background)
-                        .child(self.render_tree_column(cx))
-                        .child(self.render_detail_column(cx)),
-                ),
-            )
+            .child(resizable_panel().child(body))
     }
 }

crates/workspace/src/views/repo_detail/issue_detail.rs

@@ -21,16 +21,13 @@ use utils::relative_time;
 
 /// Detail panel of a single issue.
 pub struct IssueDetailView {
-    focus_handle: FocusHandle,
     /// Repo store holding the issues and their statuses.
     store: Entity<RepoStore>,
     issue_id: EventId,
+    contents: HashMap<EventId, SharedString>,
     /// Input state of the "leave a comment" textarea.
     comment_input: Entity<TextareaState>,
-    /// Issue/comment bodies as shared strings, keyed by event ID, so
-    /// re-renders don't clone full contents again (events are immutable,
-    /// so the cache never needs invalidation).
-    contents: HashMap<EventId, SharedString>,
+    focus_handle: FocusHandle,
 }
 
 impl IssueDetailView {
@@ -283,7 +280,13 @@ impl Render for IssueDetailView {
             let content = self
                 .contents
                 .entry(issue.id)
-                .or_insert_with(|| SharedString::from(issue.content.clone()))
+                .or_insert_with(|| {
+                    if issue.content.is_empty() {
+                        SharedString::from("No description provided.")
+                    } else {
+                        SharedString::from(&issue.content)
+                    }
+                })
                 .clone();
 
             (
@@ -338,8 +341,7 @@ impl Render for IssueDetailView {
                                                 h_flex()
                                                     .gap_1()
                                                     .child(
-                                                        UserAvatar::new(author.clone())
-                                                            .picture(picture),
+                                                        UserAvatar::new(&author).picture(picture),
                                                     )
                                                     .child(author),
                                             )

crates/workspace/src/views/repo_detail/mod.rs

@@ -1,6 +1,7 @@
 use std::collections::{HashMap, HashSet, VecDeque};
 use std::path::{Component, Path, PathBuf};
 use std::rc::Rc;
+use std::time::Duration;
 
 use anyhow::Error;
 use assets::CustomIconName;
@@ -26,9 +27,9 @@ use gpui_component::{
     VirtualListScrollHandle, h_flex, v_flex,
 };
 use nostr::prelude::{EventId, RelayUrl, ToBech32};
-use signed_core::Announcement;
+use signed_core::{Announcement, RepoAddr, filters};
 use signed_git::{CommitList, FileCommit};
-use signed_state::{Backend, GitStore, LocalReposStore, ProfileStore, RepoStore};
+use signed_state::{Backend, GitStore, LocalReposStore, ProfileStore, RepoListStore, RepoStore};
 use signed_ui::image_cache::{MAX_IMAGES, image_cache};
 use signed_ui::{DropdownButton, PixelAvatar, UserAvatar, copy_row};
 
@@ -40,8 +41,10 @@ mod helpers;
 mod init_dialog;
 mod issue_detail;
 mod issues;
+mod new_pull_request;
 mod pull_request_detail;
 mod pull_requests;
+mod send_patch;
 
 use about::open_about_dialog;
 use browser::{
@@ -52,7 +55,10 @@ use commits::COMMIT_ROW_HEIGHT;
 use diff::CommitDiffView;
 use helpers::{ShareTargets, TreeItemSeed, build_tree_items, is_markdown_path, tree_items};
 use issues::{IssuesView, open_new_issue_dialog};
-use pull_requests::{PullRequestsView, open_new_pull_request_dialog};
+use pull_requests::PullRequestsView;
+use send_patch::open_send_patch_panel;
+
+use crate::views::repo_detail::new_pull_request::open_new_pull_panel;
 
 /// What kind of ref the header selectors switch to.
 #[derive(Clone, Copy, PartialEq, Eq)]
@@ -64,13 +70,17 @@ enum RefKind {
 }
 
 /// Header actions dispatched by the dropdown menus of the header buttons.
+/// `pub(super)`: the pull-request list panel offers the same New-PR / Send-
+/// patch actions in its own dropdown.
 #[derive(Clone, Action, PartialEq, Eq)]
 #[action(namespace = repo_detail, no_json)]
-enum RepoAction {
+pub(super) enum RepoAction {
     /// Open the "new issue" dialog.
     NewIssue,
     /// Open the "new pull request" dialog.
     NewPR,
+    /// Open the "send patch" panel.
+    SendPatch,
     /// Open the about dialog.
     About,
     /// Re-push the repository to its grasp servers.
@@ -188,6 +198,9 @@ pub struct RepoDetailView {
     tasks: Vec<Task<Result<(), Error>>>,
     /// Subscriptions keeping the selectors' confirm events alive.
     _subscriptions: Vec<Subscription>,
+    /// Upstream repository (from this fork's `u` tag) the user asked to
+    /// open, while its announcement is still being fetched.
+    pending_upstream: Option<RepoAddr>,
 }
 
 impl RepoDetailView {
@@ -315,6 +328,7 @@ impl RepoDetailView {
             focus_handle: cx.focus_handle(),
             tasks: Vec::new(),
             _subscriptions: subscriptions,
+            pending_upstream: None,
         }
     }
 
@@ -959,6 +973,77 @@ impl RepoDetailView {
         });
     }
 
+    /// Open the upstream repository (the `u` tag of this fork's announcement).
+    /// When the upstream announcement is not in the local database yet,
+    /// subscribe for it and open the panel as soon as it lands.
+    fn open_upstream(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        if self.pending_upstream.is_some() {
+            return;
+        }
+
+        let Some(announcement) = self.announcement(cx).cloned() else {
+            return;
+        };
+
+        let Some(addr) = announcement.upstream.and_then(|upstream| upstream.addr) else {
+            return;
+        };
+
+        if let Some(found) = RepoListStore::global(cx)
+            .read(cx)
+            .announcements
+            .iter()
+            .find(|a| a.addr() == addr)
+            .cloned()
+        {
+            open_repo_panel(&self.dock_area, &found, window, &mut *cx);
+            return;
+        }
+
+        let backend = Backend::global(cx);
+        backend.update(cx, |backend, cx| {
+            backend.subscribe_bootstrap(vec![filters::announcement(&addr)], cx);
+        });
+        self.pending_upstream = Some(addr);
+
+        let task = cx.spawn_in(window, async move |this, cx| {
+            for _ in 0..60 {
+                cx.background_executor()
+                    .timer(Duration::from_millis(250))
+                    .await;
+
+                let opened = this.update_in(cx, |this, window, cx| {
+                    let Some(addr) = this.pending_upstream.clone() else {
+                        return true;
+                    };
+                    let found = RepoListStore::global(cx)
+                        .read(cx)
+                        .announcements
+                        .iter()
+                        .find(|a| a.addr() == addr)
+                        .cloned();
+                    match found {
+                        Some(found) => {
+                            this.pending_upstream = None;
+                            open_repo_panel(&this.dock_area, &found, window, &mut *cx);
+                            true
+                        }
+                        None => false,
+                    }
+                })?;
+
+                if opened {
+                    return Ok(());
+                }
+            }
+
+            this.update(cx, |this, _cx| this.pending_upstream = None)?;
+            Ok(())
+        });
+
+        self.tasks.push(task);
+    }
+
     /// Check out `name` (a branch or tag picked in the header) and refresh
     /// the explorer once the switch completes.
     fn switch_ref(
@@ -1285,7 +1370,12 @@ impl RepoDetailView {
                     }
                     RepoAction::NewPR => {
                         if let Some(store) = this.store.clone() {
-                            open_new_pull_request_dialog(store, window, cx);
+                            open_new_pull_panel(this.dock_area.clone(), store, window, cx);
+                        }
+                    }
+                    RepoAction::SendPatch => {
+                        if let Some(store) = this.store.clone() {
+                            open_send_patch_panel(this.dock_area.clone(), store, window, cx);
                         }
                     }
                     RepoAction::About => {
@@ -1332,6 +1422,7 @@ impl RepoDetailView {
                                     .text_ellipsis()
                                     .child(description),
                             )
+                            .when_some(fork_row(&announcement, cx), |this, row| this.child(row))
                             .child(
                                 h_flex()
                                     .mt_2()
@@ -1432,8 +1523,18 @@ impl RepoDetailView {
                                                 .gap_2()
                                                 .text_sm()
                                                 .child(Icon::new(IconName::Plus))
-                                                .child("New PR")
+                                                .child("New Pull Request")
                                         })
+                                        .menu_element(
+                                            Box::new(RepoAction::SendPatch),
+                                            |_, _| {
+                                                h_flex()
+                                                    .gap_2()
+                                                    .text_sm()
+                                                    .child(Icon::new(IconName::File))
+                                                    .child("Send Patch")
+                                            },
+                                        )
                                     }),
                             )
                             .child(
@@ -2015,3 +2116,76 @@ fn nostr_clone_url(announcement: &Announcement, nip05: Option<&str>) -> SharedSt
 
     SharedString::from(url)
 }
+
+/// The "Forked from …" row of the detail header: a clickable link to the
+/// upstream repository when the `u` tag references a NIP-34 repo,
+/// plain text when it only carries a git URL.
+fn fork_row(announcement: &Announcement, cx: &mut Context<RepoDetailView>) -> Option<AnyElement> {
+    let upstream = announcement.upstream.as_ref()?;
+
+    let (label, clickable) = match &upstream.addr {
+        Some(addr) => {
+            // Prefer the upstream's display name when its announcement
+            // is already known locally fall back to its repository id.
+            let name = RepoListStore::global(cx)
+                .read(cx)
+                .announcements
+                .iter()
+                .find(|a| a.addr() == *addr)
+                .map(|a| {
+                    a.name
+                        .clone()
+                        .unwrap_or_else(|| SharedString::from(a.id.clone()))
+                })
+                .unwrap_or_else(|| SharedString::from(addr.identifier.clone()));
+            (SharedString::from(format!("Forked from {name}")), true)
+        }
+        None => (upstream.display(), false),
+    };
+
+    let row = h_flex()
+        .gap_1()
+        .items_center()
+        .min_w_0()
+        .text_sm()
+        .text_color(cx.theme().muted_foreground)
+        .child(Icon::new(CustomIconName::GitBranch).small())
+        .child(div().whitespace_nowrap().text_ellipsis().child(label));
+
+    Some(if clickable {
+        row.id("fork-upstream")
+            .cursor_pointer()
+            .hover(|this| this.text_color(cx.theme().foreground))
+            .on_click(cx.listener(|this, _ev, window, cx| this.open_upstream(window, cx)))
+            .into_any_element()
+    } else {
+        row.into_any_element()
+    })
+}
+
+/// Open `announcement` as a repository panel in the dock's center, returning
+/// the new detail view. Shared by the explore list, the sidebar and fork
+/// links so every entry point opens repositories identically.
+pub(crate) fn open_repo_panel(
+    dock_area: &WeakEntity<DockArea>,
+    announcement: &Announcement,
+    window: &mut Window,
+    cx: &mut App,
+) -> Entity<RepoDetailView> {
+    let detail =
+        cx.new(|cx| RepoDetailView::new(dock_area.clone(), announcement.clone(), window, cx));
+
+    if let Some(dock_area) = dock_area.upgrade() {
+        dock_area.update(cx, |dock_area, cx| {
+            dock_area.add_panel_view(
+                panel_handle(detail.clone()),
+                DockPlacement::Center,
+                None,
+                window,
+                cx,
+            );
+        });
+    }
+
+    detail
+}

crates/workspace/src/views/repo_detail/new_pull_request.rs

@@ -0,0 +1,867 @@
+//! The "new pull request" panel: pick a local checkout, a base and a
+//! compare branch (GitHub-style), review the diff and the commit list, then
+//! publish the PR with only a title and an optional description. The patch
+//! series is generated from the checkout at submit time; there is no patch
+//! input.
+
+use std::path::{Path, PathBuf};
+use std::rc::Rc;
+
+use assets::CustomIconName;
+use dock::{BasePanel, DockArea, DockPlacement, Panel, PanelEvent, panel_handle};
+use gpui::prelude::*;
+use gpui::{
+    AnyElement, App, Context, Entity, EventEmitter, FocusHandle, Focusable, PathPromptOptions,
+    Pixels, Render, SharedString, Size, Subscription, Task, WeakEntity, Window, div, px, relative,
+    size,
+};
+use gpui_base::{Button as BaseButton, StyledExt};
+use gpui_component::button::{Button, ButtonVariants};
+use gpui_component::combobox::{
+    Caret, Combobox, ComboboxEvent, ComboboxState, ComboboxTriggerContext,
+};
+use gpui_component::input::{Input, InputEvent, InputState, Textarea, TextareaState};
+use gpui_component::scroll::Scrollbar;
+use gpui_component::searchable_list::SearchableVec;
+use gpui_component::spinner::Spinner;
+use gpui_component::{
+    ActiveTheme, Disableable, Icon, IconName, Sizable, VirtualListScrollHandle, h_flex, v_flex,
+    v_virtual_list,
+};
+use signed_git::{
+    format_patch_between, merge_base, worktree_commit_range_commits, worktree_commit_range_diff,
+};
+use signed_state::RepoStore;
+use signed_ui::placeholder;
+
+use super::commits::{COMMIT_ROW_HEIGHT, commit_row};
+use super::diff::{CommitDiffView, DiffPane};
+
+/// The "new pull request" panel of a repository.
+///
+/// Both branch selectors list the branches of a user-chosen local checkout;
+/// the compare view (Files/Commits tabs) is built from `merge-base..compare`
+/// in that checkout, and the patch series published with the PR is generated
+/// from the same range at submit time.
+pub struct NewPullRequestView {
+    focus_handle: FocusHandle,
+    /// Dock area the panel lives in; commit diffs are opened there.
+    dock_area: WeakEntity<DockArea>,
+    /// Store of the target repository (for the announced HEAD default).
+    store: Entity<RepoStore>,
+    /// Display name of the repository, for the panel title.
+    repo_name: SharedString,
+    /// The user's checkout: where both branches live and where the tip is
+    /// pushed from.
+    repo_path: Option<PathBuf>,
+    /// Branches of the checkout, backing both selectors.
+    branches: Vec<SharedString>,
+    /// Selected base branch (the target of the PR).
+    base: SharedString,
+    /// Selected compare branch (the source of the PR).
+    compare: SharedString,
+    base_select: Entity<ComboboxState<SearchableVec<SharedString>>>,
+    compare_select: Entity<ComboboxState<SearchableVec<SharedString>>>,
+    /// Title input (required).
+    subject: Entity<InputState>,
+    /// Description input (optional).
+    description: Entity<TextareaState>,
+    /// Merge base of the selected branches; `None` until the compare loads.
+    merge_base: Option<String>,
+    /// Commits in `merge_base..compare`, newest first.
+    commits: Option<Vec<signed_git::FileCommit>>,
+    /// The compare is being computed.
+    loading: bool,
+    /// Error of the last compare or submit attempt.
+    error: Option<SharedString>,
+    /// A submit (patch generation + publish) is in flight.
+    submitting: bool,
+    /// Bumped on every branch switch; stale compare results are discarded.
+    compare_generation: u64,
+    /// Active tab: 0 = Files, 1 = Commits.
+    active_tab: usize,
+    /// The compare diff (Files tab).
+    pane: Entity<DiffPane>,
+    /// Virtual list state of the Commits tab.
+    scroll_handle: VirtualListScrollHandle,
+    item_sizes: Rc<Vec<Size<Pixels>>>,
+    _subscriptions: Vec<Subscription>,
+    tasks: Vec<Task<Result<(), anyhow::Error>>>,
+}
+
+impl NewPullRequestView {
+    pub fn new(
+        dock_area: WeakEntity<DockArea>,
+        store: Entity<RepoStore>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Self {
+        let repo_name = store.read(cx).name();
+        let pane = cx.new(DiffPane::new);
+        let subject = cx.new(|cx| InputState::new(window, cx).placeholder("Title"));
+        let description = cx.new(|cx| TextareaState::new(window, cx).placeholder("Describe..."));
+
+        let base_select: Entity<ComboboxState<SearchableVec<SharedString>>> = cx.new(|cx| {
+            ComboboxState::new(
+                SearchableVec::new(Vec::<SharedString>::new()),
+                Vec::new(),
+                window,
+                cx,
+            )
+            .searchable(true)
+        });
+
+        let compare_select: Entity<ComboboxState<SearchableVec<SharedString>>> = cx.new(|cx| {
+            ComboboxState::new(
+                SearchableVec::new(Vec::<SharedString>::new()),
+                Vec::new(),
+                window,
+                cx,
+            )
+            .searchable(true)
+        });
+
+        let subscriptions = vec![
+            // Re-evaluate the Create button's enabled state as the title
+            // changes.
+            cx.subscribe(&subject, |_this, _state, _event: &InputEvent, cx| {
+                cx.notify();
+            }),
+            cx.subscribe_in(&base_select, window, |this, _state, event, window, cx| {
+                if let ComboboxEvent::Change(values) = event
+                    && let Some(name) = values.first()
+                {
+                    this.base = name.clone();
+                    this.reload_compare(window, cx);
+                }
+            }),
+            cx.subscribe_in(
+                &compare_select,
+                window,
+                |this, _state, event, window, cx| {
+                    if let ComboboxEvent::Change(values) = event
+                        && let Some(name) = values.first()
+                    {
+                        this.compare = name.clone();
+                        this.reload_compare(window, cx);
+                    }
+                },
+            ),
+        ];
+
+        Self {
+            focus_handle: cx.focus_handle(),
+            dock_area,
+            store,
+            repo_name,
+            repo_path: None,
+            branches: Vec::new(),
+            base: SharedString::default(),
+            compare: SharedString::default(),
+            base_select,
+            compare_select,
+            subject,
+            description,
+            merge_base: None,
+            commits: None,
+            loading: false,
+            error: None,
+            submitting: false,
+            compare_generation: 0,
+            active_tab: 0,
+            pane,
+            scroll_handle: VirtualListScrollHandle::new(),
+            item_sizes: Rc::new(Vec::new()),
+            _subscriptions: subscriptions,
+            tasks: Vec::new(),
+        }
+    }
+
+    /// Prompt for a local checkout; on success populate the branch selectors
+    /// (defaults: the announced HEAD branch for the base, the checkout's
+    /// current branch for the compare) and load the compare.
+    fn choose_checkout(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        let prompt = cx.prompt_for_paths(PathPromptOptions {
+            files: false,
+            directories: true,
+            multiple: false,
+            prompt: Some("Choose local checkout".into()),
+        });
+
+        let task = cx.spawn_in(window, async move |this, cx| {
+            // `Ok(Ok(Some(paths)))` means the user picked a folder; a
+            // cancel (or a picker failure) resolves to anything else.
+            let picked = match prompt.await {
+                Ok(Ok(Some(mut paths))) => paths.pop(),
+                _ => None,
+            };
+            let Some(path) = picked else {
+                return Ok(());
+            };
+            let path = path.to_string_lossy().to_string();
+
+            // Branches and the current branch are read off the UI thread.
+            let info = cx
+                .background_spawn({
+                    let path = path.clone();
+                    async move {
+                        let repo = gix::open(Path::new(&path)).ok()?;
+                        let branches =
+                            signed_git::worktree_branches(Path::new(&path)).unwrap_or_default();
+                        let current = signed_git::current_branch(&repo).ok().flatten();
+                        Some((branches, current))
+                    }
+                })
+                .await;
+
+            this.update_in(cx, |this, window, cx| {
+                this.apply_checkout(path, info, window, cx);
+            })?;
+
+            Ok(())
+        });
+        self.tasks.push(task);
+    }
+
+    /// Apply a picked checkout: fill the selectors and load the compare.
+    fn apply_checkout(
+        &mut self,
+        path: String,
+        info: Option<(Vec<String>, Option<String>)>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let Some((branches, current)) = info else {
+            self.error = Some("The chosen folder is not a git repository".into());
+            self.repo_path = None;
+            self.branches.clear();
+            self.merge_base = None;
+            self.commits = None;
+            self.pane.update(cx, |pane, cx| pane.clear(cx));
+            cx.notify();
+            return;
+        };
+        if branches.is_empty() {
+            self.error = Some("The repository has no branches yet".into());
+            self.repo_path = None;
+            self.branches.clear();
+            cx.notify();
+            return;
+        }
+
+        // Defaults: the announced HEAD branch when the checkout has it
+        // (falling back to `main`, then the first branch); the checkout's
+        // current branch for the compare side.
+        let announced = self.store.read(cx).head.clone();
+        let base = announced
+            .as_ref()
+            .filter(|branch| branches.contains(branch))
+            .cloned()
+            .or_else(|| branches.iter().find(|branch| *branch == "main").cloned())
+            .unwrap_or_else(|| branches[0].clone());
+        let compare = current
+            .filter(|branch| branches.contains(branch))
+            .unwrap_or_else(|| base.clone());
+
+        self.repo_path = Some(PathBuf::from(&path));
+        self.error = None;
+        self.branches = branches.into_iter().map(SharedString::from).collect();
+
+        let branches = self.branches.clone();
+        let base = SharedString::from(base.clone());
+        let compare = SharedString::from(compare.clone());
+        self.base = base.clone();
+        self.compare = compare.clone();
+        self.base_select.update(cx, |state, cx| {
+            state.set_items(SearchableVec::from(branches.clone()), window, cx);
+            state.set_selected_values(&[base], window, cx);
+        });
+        self.compare_select.update(cx, |state, cx| {
+            state.set_items(SearchableVec::from(branches), window, cx);
+            state.set_selected_values(&[compare], window, cx);
+        });
+
+        self.reload_compare(window, cx);
+    }
+
+    /// (Re)compute `merge_base..compare` of the selected branches on a
+    /// background task: the merge base, the commit list and the diff.
+    fn reload_compare(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        let Some(repo_path) = self.repo_path.clone() else {
+            return;
+        };
+        let base = self.base.to_string();
+        let compare = self.compare.to_string();
+
+        self.loading = true;
+        self.error = None;
+        self.compare_generation += 1;
+        let generation = self.compare_generation;
+        cx.notify();
+
+        if base == compare {
+            self.loading = false;
+            self.merge_base = None;
+            self.commits = None;
+            self.pane.update(cx, |pane, cx| pane.clear(cx));
+            self.error = Some("Choose different base and compare branches".into());
+            cx.notify();
+            return;
+        }
+
+        let task = cx.spawn_in(window, async move |this, cx| {
+            let result = cx
+                .background_spawn({
+                    let repo_path = repo_path.clone();
+                    let base = base.clone();
+                    let compare = compare.clone();
+                    async move {
+                        let merge_base = merge_base(Path::new(&repo_path), &base, &compare)?
+                            .ok_or_else(|| {
+                                anyhow::anyhow!("{base} and {compare} share no common ancestor")
+                            })?;
+                        let commits = worktree_commit_range_commits(
+                            Path::new(&repo_path),
+                            &merge_base,
+                            &compare,
+                        )?;
+                        let diff = worktree_commit_range_diff(
+                            Path::new(&repo_path),
+                            &merge_base,
+                            &compare,
+                        )?;
+                        Ok::<_, anyhow::Error>((merge_base, commits, diff))
+                    }
+                })
+                .await;
+
+            this.update_in(cx, |this, _window, cx| {
+                // A stale result (the branches changed mid-flight) must not
+                // clobber a newer compare; the newer task clears the flag.
+                if generation != this.compare_generation {
+                    return;
+                }
+                this.loading = false;
+                match result {
+                    Ok((merge_base, commits, diff)) => {
+                        this.merge_base = Some(merge_base);
+                        let count = commits.len();
+                        this.item_sizes = Rc::new(vec![size(px(0.), px(COMMIT_ROW_HEIGHT)); count]);
+                        this.commits = Some(commits);
+                        this.pane.update(cx, |pane, cx| pane.set_diff(diff, cx));
+                    }
+                    Err(error) => {
+                        this.merge_base = None;
+                        this.commits = None;
+                        this.pane.update(cx, |pane, cx| pane.clear(cx));
+                        this.error = Some(error.to_string().into());
+                    }
+                }
+                cx.notify();
+            })?;
+
+            Ok(())
+        });
+        self.tasks.push(task);
+    }
+
+    /// Publish the pull request: generate the patch series from the checkout
+    /// on a background task, hand it to the store, and close the panel once
+    /// the publish is underway (errors surface in the pull request list).
+    fn submit(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        if self.submitting || self.loading {
+            return;
+        }
+        let Some(repo_path) = self.repo_path.clone() else {
+            return;
+        };
+        let Some(merge_base) = self.merge_base.clone() else {
+            return;
+        };
+        let subject = self.subject.read(cx).value().to_string();
+        let description = self.description.read(cx).value().to_string();
+        let branch_name = self.compare.to_string();
+        let store = self.store.clone();
+        let dock_area = self.dock_area.clone();
+        let entity = cx.entity().clone();
+
+        self.submitting = true;
+        self.error = None;
+        cx.notify();
+
+        let task = cx.spawn_in(window, async move |this, cx| {
+            // Regenerate the series at submit time so the published patch
+            // covers the current tip of the compare branch.
+            let patch = cx
+                .background_spawn({
+                    let repo_path = repo_path.clone();
+                    let merge_base = merge_base.clone();
+                    let branch_name = branch_name.clone();
+                    async move {
+                        format_patch_between(Path::new(&repo_path), &merge_base, &branch_name)
+                    }
+                })
+                .await;
+
+            let patch = match patch {
+                Ok(patch) if !patch.is_empty() => patch,
+                Ok(_) => {
+                    this.update_in(cx, |this, _window, cx| {
+                        this.submitting = false;
+                        this.error = Some("No commits between the branches to propose".into());
+                        cx.notify();
+                    })?;
+                    return Ok(());
+                }
+                Err(error) => {
+                    this.update_in(cx, |this, _window, cx| {
+                        this.submitting = false;
+                        this.error = Some(format!("Failed to generate the patch: {error}").into());
+                        cx.notify();
+                    })?;
+                    return Ok(());
+                }
+            };
+
+            this.update_in(cx, |this, window, cx| {
+                this.submitting = false;
+                store.update(cx, |store, cx| {
+                    store.open_pull_request(
+                        (!subject.is_empty()).then_some(subject),
+                        description,
+                        Some(branch_name),
+                        patch,
+                        false,
+                        Some(merge_base),
+                        Some(repo_path),
+                        cx,
+                    );
+                });
+                // Close the panel once the publish is underway.
+                cx.defer_in(window, {
+                    let dock_area = dock_area.clone();
+                    let entity = entity.clone();
+                    move |_, window, cx| {
+                        if let Some(dock_area) = dock_area.upgrade() {
+                            dock_area.update(cx, |dock, cx| {
+                                dock.remove_panel(entity, window, cx);
+                            });
+                        }
+                    }
+                });
+                cx.notify();
+            })?;
+
+            Ok(())
+        });
+        self.tasks.push(task);
+    }
+
+    /// Open the diff of `commit_id` (from the Commits tab) in a new panel.
+    fn open_commit_diff(&mut self, commit_id: &str, window: &mut Window, cx: &mut Context<Self>) {
+        let Some(repo_path) = self.repo_path.clone() else {
+            return;
+        };
+        let Some(dock_area) = self.dock_area.upgrade() else {
+            return;
+        };
+
+        let panel = cx.new(|cx| {
+            CommitDiffView::new(
+                repo_path,
+                self.repo_name.clone(),
+                commit_id.into(),
+                window,
+                cx,
+            )
+        });
+
+        dock_area.update(cx, |dock_area, cx| {
+            dock_area.add_panel_view(panel_handle(panel), DockPlacement::Center, None, window, cx);
+        });
+    }
+
+    /// The compare bar: base/compare selectors, the checkout chooser and the
+    /// Create button.
+    fn render_compare_bar(&self, cx: &mut Context<Self>) -> AnyElement {
+        let has_checkout = self.repo_path.is_some();
+        let checkout = self.repo_path.clone();
+        let can_submit = has_checkout
+            && !self.loading
+            && !self.submitting
+            && self.merge_base.is_some()
+            && self
+                .commits
+                .as_ref()
+                .is_some_and(|commits| !commits.is_empty())
+            && !self.subject.read(cx).value().is_empty();
+
+        h_flex()
+            .px_4()
+            .h_16()
+            .w_full()
+            .gap_2()
+            .items_end()
+            .child(
+                v_flex()
+                    .gap_1()
+                    .child(
+                        div()
+                            .text_xs()
+                            .font_semibold()
+                            .text_color(cx.theme().muted_foreground)
+                            .child("Merge Into"),
+                    )
+                    .child(
+                        div().w(px(140.)).child(
+                            Combobox::new(&self.base_select)
+                                .placeholder("branch")
+                                .appearance(false)
+                                .menu_width(px(220.))
+                                .disabled(!has_checkout)
+                                .bg(cx.theme().muted)
+                                .rounded(cx.theme().radius)
+                                .render_trigger(|ctx, _window, cx| {
+                                    render_ref_trigger(ctx, CustomIconName::GitBranch, cx)
+                                }),
+                        ),
+                    ),
+            )
+            .child(
+                v_flex()
+                    .gap_1()
+                    .child(
+                        div()
+                            .text_xs()
+                            .font_semibold()
+                            .text_color(cx.theme().muted_foreground)
+                            .child("Pull From"),
+                    )
+                    .child(
+                        div().w(px(140.)).child(
+                            Combobox::new(&self.compare_select)
+                                .placeholder("branch")
+                                .appearance(false)
+                                .menu_width(px(220.))
+                                .disabled(!has_checkout)
+                                .bg(cx.theme().muted)
+                                .rounded(cx.theme().radius)
+                                .render_trigger(|ctx, _window, cx| {
+                                    render_ref_trigger(ctx, CustomIconName::GitBranch, cx)
+                                }),
+                        ),
+                    ),
+            )
+            .child(
+                Button::new("choose-checkout")
+                    .icon(IconName::Folder)
+                    .ghost()
+                    .tooltip(checkout.as_ref().map_or_else(
+                        || "Choose a local checkout".into(),
+                        |path| path.display().to_string(),
+                    ))
+                    .on_click(cx.listener(|this, _event, window, cx| {
+                        this.choose_checkout(window, cx);
+                    })),
+            )
+            .child(div().flex_1())
+            .child(
+                Button::new("create-pr")
+                    .primary()
+                    .icon(IconName::Plus)
+                    .loading(self.submitting)
+                    .disabled(!can_submit)
+                    .on_click(cx.listener(|this, _event, window, cx| {
+                        this.submit(window, cx);
+                    })),
+            )
+            .into_any_element()
+    }
+
+    /// The title and description inputs.
+    fn render_inputs(&self, _cx: &mut Context<Self>) -> AnyElement {
+        v_flex()
+            .px_4()
+            .w_full()
+            .gap_2()
+            .child(Input::new(&self.subject))
+            .child(Textarea::new(&self.description).h_24())
+            .into_any_element()
+    }
+
+    /// The Files/Commits tab bar, mirroring the repository panel's.
+    fn render_tabs(&self, cx: &mut Context<Self>) -> AnyElement {
+        let files = self.pane.read(cx).diff().map_or(0, |diff| diff.files.len());
+        let commits = self.commits.as_ref().map_or(0, |commits| commits.len());
+
+        h_flex()
+            .px_4()
+            .pb_4()
+            .w_full()
+            .gap_2()
+            .items_center()
+            .border_b_1()
+            .border_color(cx.theme().border)
+            .child(
+                BaseButton::new("files-tab")
+                    .flex()
+                    .items_center()
+                    .h_8()
+                    .px_2()
+                    .gap_2()
+                    .child(
+                        h_flex()
+                            .gap_1()
+                            .text_sm()
+                            .child(Icon::new(CustomIconName::GitFile).small())
+                            .child("Files"),
+                    )
+                    .child(count_badge(files, cx))
+                    .text_color(cx.theme().button_foreground)
+                    .rounded(cx.theme().radius)
+                    .hover(|this| this.bg(cx.theme().button_hover))
+                    .active(|this| this.bg(cx.theme().button_active))
+                    .selected(self.active_tab == 0)
+                    .when(self.active_tab == 0, |this| {
+                        this.bg(cx.theme().button_active)
+                    })
+                    .on_click(cx.listener(|this, _event, _window, cx| {
+                        this.active_tab = 0;
+                        cx.notify();
+                    })),
+            )
+            .child(
+                BaseButton::new("commits-tab")
+                    .flex()
+                    .items_center()
+                    .h_8()
+                    .px_2()
+                    .gap_2()
+                    .child(
+                        h_flex()
+                            .gap_1()
+                            .text_sm()
+                            .child(Icon::new(CustomIconName::GitCommit).small())
+                            .child("Commits"),
+                    )
+                    .child(count_badge(commits, cx))
+                    .text_color(cx.theme().button_foreground)
+                    .rounded(cx.theme().radius)
+                    .hover(|this| this.bg(cx.theme().button_hover))
+                    .active(|this| this.bg(cx.theme().button_active))
+                    .selected(self.active_tab == 1)
+                    .when(self.active_tab == 1, |this| {
+                        this.bg(cx.theme().button_active)
+                    })
+                    .on_click(cx.listener(|this, _event, _window, cx| {
+                        this.active_tab = 1;
+                        cx.notify();
+                    })),
+            )
+            .into_any_element()
+    }
+
+    /// The active tab's body.
+    fn render_content(&self, cx: &mut Context<Self>) -> AnyElement {
+        if self.loading {
+            return v_flex()
+                .size_full()
+                .items_center()
+                .justify_center()
+                .child(Spinner::new().small())
+                .into_any_element();
+        }
+        if self.repo_path.is_none() {
+            return placeholder("Choose a local checkout to compare branches", cx);
+        }
+        if self.commits.is_none() && self.error.is_some() {
+            return placeholder("Nothing to compare", cx);
+        }
+        match self.active_tab {
+            0 => self.pane.clone().into_any_element(),
+            _ => self.render_commits_tab(cx),
+        }
+    }
+
+    /// The Commits tab: `merge_base..compare` in a virtual list; clicking a
+    /// row opens the commit's diff in a new panel.
+    fn render_commits_tab(&self, cx: &mut Context<Self>) -> AnyElement {
+        let Some(commits) = self.commits.as_ref() else {
+            return placeholder("No commits", cx);
+        };
+        if commits.is_empty() {
+            return placeholder("No commits between the branches", cx);
+        }
+
+        let view = cx.entity().clone();
+        let sizes = self.item_sizes.clone();
+        let scroll_handle = self.scroll_handle.clone();
+
+        v_flex()
+            .relative()
+            .flex_1()
+            .w_full()
+            .min_h_0()
+            .child(
+                v_virtual_list(
+                    view,
+                    "pr-commits",
+                    sizes,
+                    move |this, range, _window, cx| {
+                        let commits = this.commits.as_deref().unwrap_or(&[]);
+                        let view = cx.entity().downgrade();
+                        range
+                            .map(|ix| {
+                                let id = commits[ix].id.clone();
+                                let view = view.clone();
+                                commit_row(
+                                    ix,
+                                    &commits[ix],
+                                    move |window, cx| {
+                                        if let Some(view) = view.upgrade() {
+                                            view.update(cx, |this, cx| {
+                                                this.open_commit_diff(&id, window, cx)
+                                            });
+                                        }
+                                    },
+                                    cx,
+                                )
+                            })
+                            .collect()
+                    },
+                )
+                .track_scroll(&scroll_handle)
+                .size_full(),
+            )
+            .child(
+                div()
+                    .absolute()
+                    .top_0()
+                    .left_0()
+                    .right_0()
+                    .bottom_0()
+                    .child(Scrollbar::vertical(&scroll_handle)),
+            )
+            .into_any_element()
+    }
+}
+
+/// The count badge of a tab, styled like the repository panel's.
+fn count_badge(count: usize, cx: &App) -> impl IntoElement {
+    h_flex()
+        .justify_center()
+        .px_1()
+        .py_0p5()
+        .min_w_4()
+        .text_size(px(8.))
+        .bg(cx.theme().muted)
+        .text_color(cx.theme().muted_foreground)
+        .rounded(cx.theme().radius)
+        .line_height(relative(1.))
+        .child(SharedString::from(count.to_string()))
+}
+
+/// The trigger of a branch selector: icon + current selection (or
+/// placeholder) + caret. `Combobox` replaces its default trigger entirely.
+fn render_ref_trigger(
+    ctx: &ComboboxTriggerContext<SearchableVec<SharedString>>,
+    icon: CustomIconName,
+    cx: &App,
+) -> AnyElement {
+    let muted = cx.theme().muted_foreground;
+
+    h_flex()
+        .w_full()
+        .min_w_0()
+        .gap_1()
+        .items_center()
+        .child(Icon::new(icon).small().flex_shrink_0())
+        .child(
+            div()
+                .flex_1()
+                .min_w_0()
+                .overflow_hidden()
+                .text_ellipsis()
+                .whitespace_nowrap()
+                .when(ctx.selection().is_empty(), |this| this.text_color(muted))
+                .child(
+                    ctx.selection()
+                        .first()
+                        .map(|(_, item)| item.clone())
+                        .or_else(|| ctx.placeholder().cloned())
+                        .unwrap_or_default(),
+                ),
+        )
+        .child(Caret::new(ctx.size()).text_color(muted))
+        .into_any_element()
+}
+
+/// Open the "new pull request" panel in the center dock.
+pub(super) fn open_new_pull_panel(
+    dock_area: WeakEntity<DockArea>,
+    store: Entity<RepoStore>,
+    window: &mut Window,
+    cx: &mut App,
+) {
+    let panel = cx.new(|cx| NewPullRequestView::new(dock_area.clone(), store, window, cx));
+
+    let _ = dock_area.update(cx, |dock_area, cx| {
+        dock_area.add_panel_view(panel_handle(panel), DockPlacement::Center, None, window, cx);
+    });
+}
+
+impl BasePanel for NewPullRequestView {
+    fn panel_name(&self) -> &'static str {
+        "new-pull-request"
+    }
+}
+
+impl Panel for NewPullRequestView {
+    fn title(&mut self, _window: &mut Window, _cx: &mut Context<Self>) -> impl IntoElement {
+        div().child(SharedString::from(format!(
+            "{}/new-pull-request",
+            self.repo_name
+        )))
+    }
+}
+
+impl EventEmitter<PanelEvent> for NewPullRequestView {}
+
+impl Focusable for NewPullRequestView {
+    fn focus_handle(&self, _cx: &App) -> FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
+impl Render for NewPullRequestView {
+    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        v_flex()
+            .id("new-pr")
+            .size_full()
+            .child(
+                v_flex()
+                    .gap_4()
+                    .child(self.render_compare_bar(cx))
+                    .child(self.render_inputs(cx))
+                    .when_some(self.error.clone(), |this, error| {
+                        this.child(
+                            h_flex()
+                                .px_4()
+                                .py_1()
+                                .w_full()
+                                .text_xs()
+                                .text_color(cx.theme().danger)
+                                .child(error),
+                        )
+                    })
+                    .child(self.render_tabs(cx)),
+            )
+            .child(
+                v_flex()
+                    .flex_1()
+                    .min_h_0()
+                    .w_full()
+                    .child(self.render_content(cx)),
+            )
+    }
+}

crates/workspace/src/views/repo_detail/pull_request_detail.rs

@@ -12,6 +12,8 @@ use gpui::{
 };
 use gpui_component::button::{Button, ButtonVariants};
 use gpui_component::clipboard::Clipboard;
+use gpui_component::dialog::{DialogDescription, DialogFooter, DialogHeader, DialogTitle};
+use gpui_component::form::{field, v_form};
 use gpui_component::input::{Textarea, TextareaState};
 use gpui_component::list::ListItem;
 use gpui_component::scroll::{ScrollableElement, Scrollbar};
@@ -20,12 +22,13 @@ use gpui_component::tab::{Tab, TabBar};
 use gpui_component::tag::Tag;
 use gpui_component::tree::{TreeEntry, TreeState, tree};
 use gpui_component::{
-    ActiveTheme, Icon, Sizable, StyledExt, VirtualListScrollHandle, h_flex, v_flex, v_virtual_list,
+    ActiveTheme, Icon, Sizable, StyledExt, VirtualListScrollHandle, WindowExt, h_flex, v_flex,
+    v_virtual_list,
 };
 use nostr::prelude::{Event, EventId, Kind, Nip34Tag, PublicKey};
 use signed_core::{activity_subject, pull_request_patch};
 use signed_git::{CommitDiff, FileCommit, FileDiff, patch_commits, patch_diffs};
-use signed_state::{GitStore, ProfileStore, RepoStore};
+use signed_state::{Backend, GitStore, ProfileStore, RepoStore};
 use signed_ui::image_cache::{MAX_IMAGES, image_cache};
 use signed_ui::{UserAvatar, placeholder, status_badge, tree_row};
 use utils::{relative_time, relative_time_secs};
@@ -183,7 +186,7 @@ impl PullRequestDetailView {
                 cx.notify();
                 return;
             };
-            let update = latest_update(store.pull_requests.iter(), &root.id);
+            let update = latest_update(store.pull_requests.iter(), root);
             let tip = update
                 .and_then(current_commit_of)
                 .or_else(|| current_commit_of(root));
@@ -1002,7 +1005,7 @@ impl PullRequestDetailView {
     /// Always-visible header: status badge and title, like the issue panel.
     fn render_header(&self, cx: &mut Context<Self>) -> AnyElement {
         let current_commit = self.current_commit.clone();
-        let (title, status, branch) = {
+        let (title, status, branch, author) = {
             let store = self.store.read(cx);
             let Some(root) = store
                 .pull_requests
@@ -1015,9 +1018,14 @@ impl PullRequestDetailView {
                 activity_subject(root),
                 store.status_of(root),
                 branch_name_of(root),
+                root.pubkey,
             )
         };
 
+        // Only the PR author may publish revisions (kind 1619, NIP-34).
+        let backend = Backend::global(cx);
+        let can_update = backend.read(cx).current_user() == Some(author);
+
         v_flex()
             .px_4()
             .mb_4()
@@ -1048,6 +1056,38 @@ impl PullRequestDetailView {
                                 .label(branch),
                         )
                     })
+                    .when(can_update, |this| {
+                        this.child(
+                            Button::new("update-pr")
+                                .ghost()
+                                .small()
+                                .icon(CustomIconName::GitPullRequest)
+                                .label("Update")
+                                .tooltip("Publish a new revision of this pull request")
+                                .on_click(cx.listener({
+                                    let store = self.store.clone();
+                                    let pr_id = self.pr_id;
+                                    move |_this, _event, window, cx| {
+                                        let root = store
+                                            .read(cx)
+                                            .pull_requests
+                                            .iter()
+                                            .find(|pr| {
+                                                pr.id == pr_id && pr.kind == Kind::GitPullRequest
+                                            })
+                                            .cloned();
+                                        if let Some(root) = root {
+                                            open_update_pull_request_dialog(
+                                                store.clone(),
+                                                root,
+                                                window,
+                                                cx,
+                                            );
+                                        }
+                                    }
+                                })),
+                        )
+                    })
                     .when_some(current_commit, |this, id| {
                         this.child(
                             h_flex()
@@ -1064,6 +1104,68 @@ impl PullRequestDetailView {
     }
 }
 
+/// Open the "update pull request" dialog: a patch input that submits a new
+/// revision through [`RepoStore::update_pull_request`] when confirmed.
+fn open_update_pull_request_dialog(
+    store: Entity<RepoStore>,
+    root: Event,
+    window: &mut Window,
+    cx: &mut App,
+) {
+    let patch = cx.new(|cx| {
+        TextareaState::new(window, cx).placeholder("Paste the updated `git format-patch` output...")
+    });
+    // Both the dialog body and the submit button capture the root event;
+    // share it instead of cloning into each closure.
+    let root = Rc::new(root);
+
+    window.open_dialog(cx, move |dialog, _window, _cx| {
+        let store = store.clone();
+        let patch = patch.clone();
+        let root = root.clone();
+
+        dialog
+            .width(px(520.))
+            .margin_top(px(50.))
+            .content(move |body, _window, _cx| {
+                body.child(
+                    DialogHeader::new()
+                        .child(DialogTitle::new().child("Update pull request"))
+                        .child(DialogDescription::new().child(
+                            "Publish a new revision with the output of `git format-patch`.",
+                        )),
+                )
+                .child(
+                    v_form().child(
+                        field()
+                            .label("Patch")
+                            .child(Textarea::new(&patch).h(px(160.))),
+                    ),
+                )
+                .child(
+                    DialogFooter::new().justify_end().child(
+                        Button::new("submit")
+                            .primary()
+                            .label("Update pull request")
+                            .tooltip("Update pull request")
+                            .on_click({
+                                let store = store.clone();
+                                let patch = patch.clone();
+                                let root = root.clone();
+                                move |_event, window, cx| {
+                                    let patch = patch.read(cx).value().to_string();
+                                    store.update(cx, |store, cx| {
+                                        store.update_pull_request(&root, patch, cx);
+                                    });
+                                    window.close_dialog(cx);
+                                }
+                            }),
+                    ),
+                )
+            })
+    });
+}
+
 /// One sidebar section title.
 fn sidebar_title(text: &str, cx: &App) -> AnyElement {
     div()
@@ -1121,11 +1223,13 @@ fn branch_name_of(event: &Event) -> Option<String> {
 }
 
 /// The latest PR update (kind 1619) revising `root`, found via its NIP-22
-/// `E` tag pointing at the root PR event.
-fn latest_update<'a>(events: impl Iterator<Item = &'a Event>, root: &EventId) -> Option<&'a Event> {
-    let root_hex = root.to_hex();
+/// `E` tag pointing at the root PR event. Only updates by the PR author
+/// count: the tip of a PR is only mutable by its author (NIP-34).
+fn latest_update<'a>(events: impl Iterator<Item = &'a Event>, root: &Event) -> Option<&'a Event> {
+    let root_hex = root.id.to_hex();
     events
         .filter(|e| e.kind == Kind::GitPullRequestUpdate)
+        .filter(|e| e.pubkey == root.pubkey)
         .filter(|e| {
             e.tags
                 .iter()
@@ -1262,16 +1366,35 @@ mod tests {
         );
 
         let events = [unrelated, revision(200), root.clone(), revision(300)];
-        let latest = latest_update(events.iter(), &root.id).expect("an update");
+        let latest = latest_update(events.iter(), &root).expect("an update");
 
         assert_eq!(latest.created_at.as_secs(), 300);
         assert_eq!(latest.kind, Kind::GitPullRequestUpdate);
     }
 
+    #[test]
+    fn latest_update_ignores_other_authors() {
+        let root = pr_root();
+        let root_hex = root.id.to_hex();
+        let other = Keys::new(
+            SecretKey::from_hex("0000000000000000000000000000000000000000000000000000000000000002")
+                .expect("valid secret key"),
+        );
+        let stranger = EventBuilder::new(Kind::GitPullRequestUpdate, "")
+            .tags([Tag::parse(["E", &root_hex]).expect("valid tag")])
+            .custom_created_at(Timestamp::from(999))
+            .finalize(&other)
+            .expect("signed event");
+
+        // The tip of a PR is only mutable by its author: a newer update
+        // from anyone else must not win.
+        assert!(latest_update([&stranger, &root].into_iter(), &root).is_none());
+    }
+
     #[test]
     fn latest_update_ignores_roots_without_revisions() {
         let root = pr_root();
-        assert!(latest_update([&root].into_iter(), &root.id).is_none());
+        assert!(latest_update([&root].into_iter(), &root).is_none());
     }
 
     #[test]

crates/workspace/src/views/repo_detail/pull_requests.rs

@@ -7,22 +7,23 @@ use gpui::{
     AnyElement, App, Context, Entity, EventEmitter, FocusHandle, Focusable, Pixels, Render,
     SharedString, Size, WeakEntity, Window, div, px, size,
 };
-use gpui_component::button::{Button, ButtonVariants};
-use gpui_component::dialog::{DialogDescription, DialogFooter, DialogHeader, DialogTitle};
-use gpui_component::form::{field, v_form};
-use gpui_component::input::{Input, InputState, Textarea, TextareaState};
+use gpui_base::Button as BaseButton;
+use gpui_component::alert::Alert;
 use gpui_component::scroll::Scrollbar;
 use gpui_component::{
-    ActiveTheme, Icon, VirtualListScrollHandle, WindowExt, h_flex, v_flex, v_virtual_list,
+    ActiveTheme, Icon, IconName, VirtualListScrollHandle, h_flex, v_flex, v_virtual_list,
 };
 use nostr::prelude::{EventId, Kind};
 use signed_core::{RepoStatus, activity_subject};
 use signed_state::{ProfileStore, RepoStore};
 use signed_ui::image_cache::{MAX_IMAGES, image_cache};
-use signed_ui::{SegmentButton, UserAvatar, placeholder, status_badge};
+use signed_ui::{DropdownButton, SegmentButton, UserAvatar, placeholder, status_badge};
 use utils::relative_time;
 
+use super::RepoAction;
+use super::new_pull_request::open_new_pull_panel;
 use super::pull_request_detail::PullRequestDetailView;
+use super::send_patch::open_send_patch_panel;
 
 /// Height of one pull request row in the virtual list; same layout as an
 /// issue row.
@@ -40,8 +41,7 @@ enum PullRequestFilter {
     Closed,
     /// Pull requests whose resolved status is [`RepoStatus::Draft`].
     Draft,
-    /// Pull requests whose resolved status is [`RepoStatus::Applied`]
-    /// (i.e. merged).
+    /// Pull requests whose resolved status is [`RepoStatus::Applied`].
     Merged,
 }
 
@@ -217,7 +217,7 @@ impl PullRequestsView {
             .child(
                 h_flex()
                     .h_12()
-                    .gap_2()
+                    .gap_1()
                     .child(
                         SegmentButton::new("all", "All")
                             .icon(Icon::new(CustomIconName::GitPullRequest))
@@ -271,99 +271,47 @@ impl PullRequestsView {
             )
             .child(div().flex_1())
             .child(
-                SegmentButton::new("new-pr", "New pull request")
-                    .icon(Icon::new(CustomIconName::CirclePlus))
-                    .primary()
-                    .on_click(cx.listener(|this, _event, window, cx| {
-                        open_new_pull_request_dialog(this.store.clone(), window, cx);
-                    })),
+                h_flex().items_center().child(
+                    DropdownButton::new("new-pr-actions")
+                        .action(
+                            BaseButton::new("new-pr")
+                                .child(
+                                    h_flex()
+                                        .h_8()
+                                        .px_2()
+                                        .gap_1()
+                                        .rounded(cx.theme().radius)
+                                        .bg(cx.theme().primary)
+                                        .hover(|this| this.bg(cx.theme().primary_hover))
+                                        .text_sm()
+                                        .text_color(cx.theme().primary_foreground)
+                                        .child(Icon::new(IconName::Plus))
+                                        .child("New"),
+                                )
+                                .on_click(cx.listener(|this, _event, window, cx| {
+                                    open_new_pull_panel(
+                                        this.dock_area.clone(),
+                                        this.store.clone(),
+                                        window,
+                                        cx,
+                                    );
+                                })),
+                        )
+                        .dropdown_menu(|menu, _, _| {
+                            menu.menu_element(Box::new(RepoAction::SendPatch), |_, _| {
+                                h_flex()
+                                    .gap_2()
+                                    .text_sm()
+                                    .child(Icon::new(IconName::File))
+                                    .child("Send Patch")
+                            })
+                        }),
+                ),
             )
             .into_any_element()
     }
 }
 
-/// Open the "new pull request" dialog: a title, an optional description and
-/// a patch input that submit through [`RepoStore::open_pull_request`] when
-/// confirmed.
-pub(super) fn open_new_pull_request_dialog(
-    store: Entity<RepoStore>,
-    window: &mut Window,
-    cx: &mut App,
-) {
-    let subject = cx.new(|cx| InputState::new(window, cx).placeholder("Pull request title"));
-    let description =
-        cx.new(|cx| TextareaState::new(window, cx).placeholder("Describe the change..."));
-    let patch = cx
-        .new(|cx| TextareaState::new(window, cx).placeholder("Paste `git format-patch` output..."));
-
-    window.open_dialog(cx, move |dialog, _window, _cx| {
-        let subject = subject.clone();
-        let description = description.clone();
-        let patch = patch.clone();
-        let store = store.clone();
-
-        dialog
-            .width(px(520.))
-            .margin_top(px(50.))
-            .content(move |body, _window, _cx| {
-                body.child(
-                    DialogHeader::new()
-                        .child(DialogTitle::new().child("New pull request"))
-                        .child(
-                            DialogDescription::new()
-                                .child("Propose a change with the output of `git format-patch`."),
-                        ),
-                )
-                .child(
-                    v_form()
-                        .child(
-                            field()
-                                .label("Title")
-                                .required(true)
-                                .child(Input::new(&subject)),
-                        )
-                        .child(
-                            field()
-                                .label("Description")
-                                .child(Textarea::new(&description).h(px(96.))),
-                        )
-                        .child(
-                            field()
-                                .label("Patch")
-                                .child(Textarea::new(&patch).h(px(160.))),
-                        ),
-                )
-                .child(
-                    DialogFooter::new().justify_end().child(
-                        Button::new("submit")
-                            .primary()
-                            .label("Create pull request")
-                            .tooltip("Create pull request")
-                            .on_click({
-                                let subject = subject.clone();
-                                let description = description.clone();
-                                let patch = patch.clone();
-                                let store = store.clone();
-
-                                move |_event, window, cx| {
-                                    let subject = subject.read(cx).value().to_string();
-                                    let description = description.read(cx).value().to_string();
-                                    let patch = patch.read(cx).value().to_string();
-                                    let subject = (!subject.is_empty()).then_some(subject);
-
-                                    store.update(cx, |store, cx| {
-                                        store.open_pull_request(subject, description, patch, cx);
-                                    });
-
-                                    window.close_dialog(cx);
-                                }
-                            }),
-                    ),
-                )
-            })
-    });
-}
-
 impl BasePanel for PullRequestsView {
     fn panel_name(&self) -> &'static str {
         "pull-requests"
@@ -437,10 +385,38 @@ impl Render for PullRequestsView {
         let scroll_handle = self.scroll_handle.clone();
         let view = cx.entity().clone();
 
+        // Non-fatal warnings and errors of the last action (e.g. creating
+        // or updating a PR), shown as dismissible banners above the list.
+        let (last_error, last_warning) = {
+            let store = self.store.read(cx);
+            (store.last_error.clone(), store.last_warning.clone())
+        };
+
         v_flex()
             .size_full()
             .image_cache(image_cache("pull-requests", MAX_IMAGES))
+            .on_action(cx.listener(|this, action: &RepoAction, window, cx| {
+                if action == &RepoAction::SendPatch {
+                    open_send_patch_panel(this.dock_area.clone(), this.store.clone(), window, cx);
+                }
+            }))
             .child(self.render_header(cx))
+            .when_some(last_warning, |this, warning| {
+                this.child(Alert::warning("pr-warning", warning).banner().on_close({
+                    let store = self.store.clone();
+                    move |_event, _window, cx| {
+                        store.update(cx, |store, _| store.last_warning = None);
+                    }
+                }))
+            })
+            .when_some(last_error, |this, error| {
+                this.child(Alert::error("pr-error", error).banner().on_close({
+                    let store = self.store.clone();
+                    move |_event, _window, cx| {
+                        store.update(cx, |store, _| store.last_error = None);
+                    }
+                }))
+            })
             .child(
                 v_flex()
                     .relative()

crates/workspace/src/views/repo_detail/send_patch.rs

@@ -0,0 +1,265 @@
+use dock::{BasePanel, DockArea, DockPlacement, Panel, PanelEvent, panel_handle};
+use gpui::prelude::*;
+use gpui::{
+    AnyElement, App, Context, Entity, EventEmitter, FocusHandle, Focusable, Render, SharedString,
+    Subscription, WeakEntity, Window, div, px,
+};
+use gpui_base::{Button as BaseButton, StyledExt};
+use gpui_component::input::{Input, InputEvent, InputState, Textarea, TextareaState};
+use gpui_component::scroll::ScrollableElement;
+use gpui_component::spinner::Spinner;
+use gpui_component::{ActiveTheme, Icon, IconName, Sizable, h_flex, v_flex};
+use signed_state::RepoStore;
+
+pub struct SendPatchView {
+    focus_handle: FocusHandle,
+    /// Dock area the panel lives in.
+    dock_area: WeakEntity<DockArea>,
+    /// Store of the target repository.
+    store: Entity<RepoStore>,
+    /// Display name of the repository, for the panel title.
+    repo_name: SharedString,
+    /// Title input (required).
+    subject: Entity<InputState>,
+    /// Description input (optional).
+    description: Entity<TextareaState>,
+    /// The pasted `git format-patch` output (required).
+    patch: Entity<TextareaState>,
+    /// A submit is in flight.
+    submitting: bool,
+    /// Error of the last submit attempt (keeps the panel open).
+    error: Option<SharedString>,
+    _subscriptions: Vec<Subscription>,
+}
+
+impl SendPatchView {
+    pub fn new(
+        dock_area: WeakEntity<DockArea>,
+        store: Entity<RepoStore>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Self {
+        let repo_name = store.read(cx).name();
+        let subject = cx.new(|cx| InputState::new(window, cx).placeholder("Title"));
+        let description = cx
+            .new(|cx| TextareaState::new(window, cx).placeholder("Describe the change (optional)"));
+        let patch = cx.new(|cx| {
+            TextareaState::new(window, cx).placeholder("diff --git a/file.txt b/file.txt\nindex 1234567..abcdefg 100644\n--- a/file.txt\n+++ b/file.txt")
+        });
+
+        // Re-evaluate the Send button's enabled state as the inputs change.
+        let subscriptions = vec![
+            cx.subscribe(&subject, |_this, _state, _event: &InputEvent, cx| {
+                cx.notify();
+            }),
+            cx.subscribe(&patch, |_this, _state, _event: &InputEvent, cx| {
+                cx.notify();
+            }),
+        ];
+
+        Self {
+            focus_handle: cx.focus_handle(),
+            dock_area,
+            store,
+            repo_name,
+            subject,
+            description,
+            patch,
+            submitting: false,
+            error: None,
+            _subscriptions: subscriptions,
+        }
+    }
+
+    /// Publish the pull request from the pasted patch. The store validates
+    /// synchronously (patch shape, per-part size, sign-in); on failure the
+    /// panel stays open with the error inline, on success it closes — async
+    /// publish failures surface in the pull request list's banner.
+    fn submit(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        if self.submitting {
+            return;
+        }
+        let subject = self.subject.read(cx).value().to_string();
+        let description = self.description.read(cx).value().to_string();
+        let patch = self.patch.read(cx).value().to_string();
+        if patch.is_empty() {
+            return;
+        }
+        let store = self.store.clone();
+        let dock_area = self.dock_area.clone();
+        let entity = cx.entity().clone();
+
+        self.submitting = true;
+        self.error = None;
+        cx.notify();
+
+        // Errors the store detects before publishing are returned
+        // synchronously through `last_error`.
+        let sync_error = store.update(cx, |store, cx| {
+            store.open_pull_request(
+                (!subject.is_empty()).then_some(subject),
+                description,
+                None,
+                patch,
+                false,
+                None,
+                None,
+                cx,
+            );
+            store.last_error.clone()
+        });
+
+        if let Some(error) = sync_error {
+            self.submitting = false;
+            self.error = Some(error.into());
+            cx.notify();
+            return;
+        }
+
+        // Close the panel once the publish is underway.
+        cx.defer_in(window, {
+            let dock_area = dock_area.clone();
+            let entity = entity.clone();
+            move |_, window, cx| {
+                if let Some(dock_area) = dock_area.upgrade() {
+                    dock_area.update(cx, |dock, cx| {
+                        dock.remove_panel(entity, window, cx);
+                    });
+                }
+            }
+        });
+        cx.notify();
+    }
+
+    fn render_footer(&self, cx: &mut Context<Self>) -> AnyElement {
+        let can_submit = !self.submitting
+            && !self.subject.read(cx).value().is_empty()
+            && !self.patch.read(cx).value().is_empty();
+
+        h_flex()
+            .px_4()
+            .h_16()
+            .w_full()
+            .gap_2()
+            .items_center()
+            .border_t_1()
+            .border_color(cx.theme().border)
+            .child(div().flex_1())
+            .child(
+                BaseButton::new("send-patch")
+                    .h_flex()
+                    .h_8()
+                    .px_2()
+                    .gap_1()
+                    .text_sm()
+                    .items_center()
+                    .justify_center()
+                    .bg(cx.theme().primary)
+                    .text_color(cx.theme().primary_foreground)
+                    .hover(|this| this.bg(cx.theme().primary_hover))
+                    .active(|this| this.bg(cx.theme().primary_active))
+                    .map(|this| {
+                        if self.submitting {
+                            this.child(Spinner::new().small())
+                        } else {
+                            this.child(Icon::new(IconName::ArrowUp)).child("Send patch")
+                        }
+                    })
+                    .disabled(!can_submit)
+                    .on_click(cx.listener(|this, _event, window, cx| {
+                        this.submit(window, cx);
+                    })),
+            )
+            .into_any_element()
+    }
+
+    fn render_inputs(&self, _cx: &mut Context<Self>) -> AnyElement {
+        v_flex()
+            .px_4()
+            .py_2()
+            .w_full()
+            .gap_2()
+            .child(Input::new(&self.subject))
+            .child(Textarea::new(&self.description).h(px(64.)))
+            .into_any_element()
+    }
+
+    fn render_patch(&self, cx: &mut Context<Self>) -> AnyElement {
+        const MSG: &str = "You can paste a git diff or a git format-patch patch series here.";
+
+        v_flex()
+            .px_4()
+            .py_2()
+            .w_full()
+            .gap_2()
+            .child(
+                div()
+                    .text_xs()
+                    .text_color(cx.theme().muted_foreground)
+                    .child(MSG),
+            )
+            .child(Textarea::new(&self.patch).h_56())
+            .into_any_element()
+    }
+}
+
+pub(super) fn open_send_patch_panel(
+    dock_area: WeakEntity<DockArea>,
+    store: Entity<RepoStore>,
+    window: &mut Window,
+    cx: &mut App,
+) {
+    let panel = cx.new(|cx| SendPatchView::new(dock_area.clone(), store, window, cx));
+
+    let _ = dock_area.update(cx, |dock_area, cx| {
+        dock_area.add_panel_view(panel_handle(panel), DockPlacement::Center, None, window, cx);
+    });
+}
+
+impl BasePanel for SendPatchView {
+    fn panel_name(&self) -> &'static str {
+        "send-patch"
+    }
+}
+
+impl Panel for SendPatchView {
+    fn title(&mut self, _window: &mut Window, _cx: &mut Context<Self>) -> impl IntoElement {
+        div().child(SharedString::from(format!("{}/send-patch", self.repo_name)))
+    }
+}
+
+impl EventEmitter<PanelEvent> for SendPatchView {}
+
+impl Focusable for SendPatchView {
+    fn focus_handle(&self, _cx: &App) -> FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
+impl Render for SendPatchView {
+    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        v_flex()
+            .id("send-patch")
+            .size_full()
+            .child(
+                v_flex()
+                    .overflow_y_scrollbar()
+                    .flex_1()
+                    .w_full()
+                    .child(self.render_inputs(cx))
+                    .when_some(self.error.clone(), |this, error| {
+                        this.child(
+                            h_flex()
+                                .px_4()
+                                .py_1()
+                                .w_full()
+                                .text_xs()
+                                .text_color(cx.theme().danger)
+                                .child(error),
+                        )
+                    })
+                    .child(self.render_patch(cx)),
+            )
+            .child(self.render_footer(cx))
+    }
+}

crates/workspace/src/views/repo_list.rs

@@ -1,7 +1,7 @@
 use std::rc::Rc;
 
 use assets::CustomIconName;
-use dock::{BasePanel, DockArea, DockPlacement, Panel, PanelEvent, panel_handle};
+use dock::{BasePanel, DockArea, Panel, PanelEvent};
 use gpui::prelude::*;
 use gpui::{
     AnyElement, App, Context, Entity, EventEmitter, FocusHandle, Focusable, Pixels, Render,
@@ -19,7 +19,7 @@ use signed_ui::image_cache::{MAX_IMAGES, image_cache};
 use signed_ui::{SegmentButton, UserAvatar};
 use utils::relative_time;
 
-use super::RepoDetailView;
+use super::open_repo_panel;
 
 const COLUMNS: usize = 2;
 const CARD_HEIGHT: f32 = 40. + 64. + 48. + 2. + 6.;
@@ -173,21 +173,7 @@ impl RepoListView {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        let dock_area = self.dock_area.clone();
-        let detail =
-            cx.new(|cx| RepoDetailView::new(dock_area.clone(), announcement.clone(), window, cx));
-
-        if let Some(dock_area) = dock_area.upgrade() {
-            dock_area.update(cx, |dock_area, cx| {
-                dock_area.add_panel_view(
-                    panel_handle(detail),
-                    DockPlacement::Center,
-                    None,
-                    window,
-                    cx,
-                );
-            });
-        }
+        open_repo_panel(&self.dock_area, announcement, window, &mut *cx);
     }
 
     fn render_card(
@@ -215,6 +201,26 @@ impl RepoListView {
             .map(|label| SharedString::from(format!("Updated {label}")))
             .unwrap_or_default();
 
+        // Fork badge: the upstream's display name when its announcement is
+        // known locally, otherwise its repository id from the `u` tag.
+        let fork_label: Option<SharedString> =
+            announcement.upstream.as_ref().and_then(|upstream| {
+                let addr = upstream.addr.as_ref()?;
+                let name = self
+                    .store
+                    .read(cx)
+                    .announcements
+                    .iter()
+                    .find(|a| a.addr() == *addr)
+                    .map(|a| {
+                        a.name
+                            .clone()
+                            .unwrap_or_else(|| SharedString::from(a.id.clone()))
+                    })
+                    .unwrap_or_else(|| SharedString::from(addr.identifier.clone()));
+                Some(SharedString::from(format!("forked from {name}")))
+            });
+
         v_flex()
             .id(ix)
             .flex_1()
@@ -228,11 +234,29 @@ impl RepoListView {
             .child(
                 h_flex()
                     .h_10()
-                    .text_sm()
-                    .font_semibold()
-                    .whitespace_nowrap()
-                    .text_ellipsis()
-                    .child(name),
+                    .gap_1p5()
+                    .items_center()
+                    .child(
+                        div()
+                            .min_w_0()
+                            .text_sm()
+                            .font_semibold()
+                            .whitespace_nowrap()
+                            .text_ellipsis()
+                            .child(name),
+                    )
+                    .when_some(fork_label, |this, label| {
+                        this.child(
+                            h_flex()
+                                .gap_1()
+                                .items_center()
+                                .text_xs()
+                                .text_color(cx.theme().muted_foreground)
+                                .whitespace_nowrap()
+                                .child(Icon::new(CustomIconName::GitBranch).small())
+                                .child(label),
+                        )
+                    }),
             )
             .child(
                 div()

crates/workspace/src/views/sidebar/create_repo_dialog.rs

@@ -1,4 +1,4 @@
-use dock::{DockArea, DockPlacement, panel_handle};
+use dock::DockArea;
 use gpui::prelude::*;
 use gpui::{App, Entity, PathPromptOptions, SharedString, WeakEntity, Window, div, px};
 use gpui_base::input::TextareaState;
@@ -11,7 +11,7 @@ use settings::SettingsStore;
 use signed_core::Announcement;
 use signed_state::Backend;
 
-use super::super::RepoDetailView;
+use super::super::open_repo_panel;
 use super::grasp_servers::{GraspServersState, grasp_servers_field, load_user_grasp_servers};
 
 /// Shared state for the Create Repository dialog, so async results can be rendered.
@@ -262,13 +262,5 @@ fn open_repo(
     window: &mut Window,
     cx: &mut App,
 ) {
-    let Some(dock_area) = dock_area.upgrade() else {
-        return;
-    };
-
-    let panel = cx.new(|cx| RepoDetailView::new(dock_area.downgrade(), announcement, window, cx));
-
-    dock_area.update(cx, |dock_area, cx| {
-        dock_area.add_panel_view(panel_handle(panel), DockPlacement::Center, None, window, cx);
-    });
+    open_repo_panel(&dock_area, &announcement, window, cx);
 }

crates/workspace/src/views/sidebar/mod.rs

@@ -19,7 +19,7 @@ use signed_state::{Backend, BackendEvent, LocalReposStore, Profile, ProfileStore
 use signed_ui::image_cache::{MAX_IMAGES, image_cache};
 use signed_ui::{NavItem, PixelAvatar, UserAvatar, title_bar_drag_handlers};
 
-use super::{RepoDetailView, RepoListView};
+use super::{RepoDetailView, RepoListView, open_repo_panel};
 
 mod create_repo_dialog;
 pub(crate) mod grasp_servers;
@@ -100,7 +100,8 @@ impl SidebarPanel {
     fn refresh_my_repos(&mut self, cx: &mut Context<Self>) {
         self.my_repos_subscription = None;
 
-        let author = Backend::global(cx).read(cx).current_user();
+        let backend = Backend::global(cx);
+        let author = backend.read(cx).current_user();
         self.my_repos = author.map(|author| cx.new(|cx| RepoListStore::new(Some(author), cx)));
 
         if let Some(store) = self.my_repos.as_ref() {
@@ -158,19 +159,7 @@ impl SidebarPanel {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        let detail = cx.new(|cx| {
-            RepoDetailView::new(self.dock_area.clone(), announcement.clone(), window, cx)
-        });
-
-        let _ = self.dock_area.update(cx, |dock_area, cx| {
-            dock_area.add_panel_view(
-                panel_handle(detail),
-                DockPlacement::Center,
-                None,
-                window,
-                cx,
-            );
-        });
+        open_repo_panel(&self.dock_area, announcement, window, &mut *cx);
     }
 
     /// Open a local repository's detail view in the dock's center; the

docs/PR_FLOW.md

@@ -0,0 +1,139 @@
+# Pull request flow
+
+How a pull request moves through Signed from creation to merge. A PR is a
+kind-1618 root event whose content is the markdown description; its changes
+live in a NIP-10-chained series of kind-1617 patch events (one per commit),
+whose root the PR references via an `e` tag. Revisions publish new patch
+events plus kind-1619 updates; statuses (kind 1630-1633) resolve the PR's
+state.
+
+## Whole lifecycle
+
+```mermaid
+graph TD
+    A["New pull request dialog"] --> B{"Patch source"}
+    B -->|"Paste"| C["Paste git format-patch output"]
+    B -->|"Local checkout"| D["Browse for checkout"]
+    D --> E["Defaults: source = current branch, target = announced HEAD"]
+    E --> F["Generate: merge-base plus format-patch base..tip"]
+    F --> G["Apply check vs mirror clone - non-blocking warning"]
+    C --> H["Submit"]
+    F --> H
+    G --> H
+    H --> I["split_patch_series: one part per commit"]
+    I --> J{"Any part over 60 KB?"}
+    J -->|"Yes"| K["Refuse with message"]
+    J -->|"No"| L["tip = last part's From commit"]
+    L --> M["Publish kind-1617 patch series: first has t root, later parts e-reply chained"]
+    M --> N["Build kind-1618 PR event: c = tip, e = root patch, branch-name, merge-base"]
+    N --> O["Sign early - learn the event id"]
+    O --> P["Push tip to refs/nostr/event-id on every announced grasp server"]
+    P -->|"All rejected"| Q["last_warning banner in PR list"]
+    P --> R["Publish kind-1618 PR event"]
+    Q --> R
+    R --> S{"Draft?"}
+    S -->|"Yes"| T["Publish kind-1633 draft status"]
+    S -->|"No"| U["PR open"]
+    T --> U
+    U --> V{"Author updates?"}
+    V -->|"Yes"| W["Publish revision patch series: first has t root-revision and e-replies to the original root"]
+    W --> X["Publish kind-1619 update: E/P NIP-22 tags, c = new tip"]
+    X --> U
+    V -->|"No"| Y{"Repository author merges?"}
+    Y -->|"Yes"| Z["Apply the series with git am on the mirror clone"]
+    Z --> AA["applied = rev-list previous-head..HEAD"]
+    AA --> AB["Publish kind-1631 applied status: applied-as-commits plus r per commit, q plus e-reply per patch event"]
+    AB --> AC["PR merged"]
+    Y -->|"Close instead"| AD["Publish kind-1632 closed status"]
+    AD --> AE["PR closed"]
+```
+
+Key points of the write side:
+
+- **Merge base**: only computable in the local-checkout path
+  (`signed_git::merge_base`); the paste path publishes none. The dialog
+  reuses it at submit only while the patch textarea is unchanged.
+- **Patch series**: each commit becomes its own kind-1617 event so no event
+  grows past NIP-34's 60 KB guidance; the PR's `c` tag carries the *last*
+  commit of the series (the tip), and each part carries its own
+  `commit`/`r` tags.
+- **Push before publish**: the tip is pushed to every announced grasp
+  server under `refs/nostr/<event-id>` (nak's convention) so the announced
+  `clone` URLs really can serve the commit. Failure is non-fatal — the
+  patch events remain the source of truth — and surfaces as a
+  `last_warning` banner.
+
+## Creating a pull request - event ordering
+
+```mermaid
+sequenceDiagram
+    participant User
+    participant App
+    participant Checkout as Local checkout
+    participant Grasp as Grasp servers
+    participant Relays as Nostr relays
+
+    User->>App: pick checkout and branches, Generate
+    App->>Checkout: merge-base(source, target)
+    Checkout-->>App: base commit
+    App->>Checkout: format-patch base..tip
+    Checkout-->>App: patch series
+    App->>App: split series, check per-part size
+    loop each patch of the series
+        App->>Relays: publish kind-1617 (first: t root, later: e reply)
+    end
+    App->>App: build and sign kind-1618 PR event
+    App->>Grasp: push tip to refs/nostr/event-id
+    Grasp-->>App: accepted or rejected (best-effort)
+    App->>Relays: publish kind-1618 PR event
+    opt draft
+        App->>Relays: publish kind-1633 draft status
+    end
+```
+
+## Updating and merging
+
+```mermaid
+sequenceDiagram
+    participant Author
+    participant Relays as Nostr relays
+    participant Maintainer
+    participant Clone as Mirror clone
+
+    Note over Author,Relays: Update - PR author only
+    Author->>Relays: publish revision patch series (t root-revision, e reply to original root)
+    Author->>Relays: publish kind-1619 update (E/P tags, c = new tip)
+
+    Note over Maintainer,Clone: Merge - repository author only (store-only today)
+    Maintainer->>Clone: git am the patch series
+    Clone-->>Maintainer: applied commits (rev-list previous-head..HEAD)
+    Maintainer->>Relays: publish kind-1631 applied status
+    Note over Relays: applied-as-commits and r per commit, q and e-reply per applied patch event
+```
+
+## Reading side
+
+```mermaid
+graph TD
+    A["PR root kind-1618"] --> B{"Newest status event by author or maintainer?"}
+    B -->|"1633"| C["Draft"]
+    B -->|"1631"| D["Applied / merged"]
+    B -->|"1632"| E["Closed"]
+    B -->|"1630 or none"| F["Open"]
+    A --> G{"Newest kind-1619 update by PR author?"}
+    G -->|"Yes"| H["tip = update's c tag"]
+    G -->|"No"| I["tip = root's c tag"]
+    A --> J{"Patch set present?"}
+    J -->|"Yes"| K["Root patch via e tag, follow reply chain (newest wins per revision)"]
+    J -->|"No"| L["Diff merge-base..tip from the git clone"]
+```
+
+Reader rules that keep the flow consistent:
+
+- **Status**: only status events by the root author or a repository
+  maintainer count; the newest wins, `Open` is the default.
+- **Tip**: only kind-1619 updates by the PR author move the tip — a
+  stranger's update is ignored.
+- **Diff**: the patch set is preferred (NIP-34 `e`-linked chain); PRs from
+  other clients without patch events fall back to diffing
+  `merge-base..tip` in the local clone.

docs/TODO.md

@@ -1,12 +1,40 @@
 # TODO
 
-## Local repository scan
+## Fork support
 
-- [ ] Make the scanned directories configurable (currently fixed to Desktop and Documents).
+- [x] Fork badge on repo list cards (`repo_list.rs::render_card`).
+- [x] "Forked from …" text button in the repo detail header (`repo_detail/mod.rs::render_header`) and About dialog.
+- [x] Clicking the upstream opens it as a center panel (shared `open_repo_panel` helper).
 
-## Create repository dialog
+## Pull request improvement
 
-- [ ] Remember the folder picked in the create-repository dialog and default to it next time (currently defaults to Desktop).
+### New pull request panel (replaces the dialog)
+
+- [x] "New pull request" (PR list header + repo header `New PR`) opens a center panel instead of the paste dialog:
+  - [x] Base/compare branch selectors fed from a user-chosen local checkout (GitHub-style; defaults: announced HEAD for base, checkout's current branch for compare).
+  - [x] Files/Commits tabs like the repo panel: diff of `merge-base..compare` (shared `DiffPane` widget, also extracted for the commit diff panel) + virtual commit list with count badge; clicking a commit opens its diff panel.
+  - [x] Only two inputs: title (required, gates the Create button) and description (optional).
+  - [x] Patch is generated from the checkout at submit time (`format_patch_between` on the stored merge base); panel closes after publishing, errors surface in the PR list banner.
+- [x] Removed with the dialog: paste textarea, draft checkbox, branch-name input and the mirror-clone apply-check hint (store behavior unchanged: `open_pull_request` still publishes the series + `branch-name`/`merge-base`/`r` tags and pushes the tip).
+
+### Send patch panel (classic paste flow)
+
+- [x] "Send patch" entry in the repo header PRs dropdown (`RepoAction::SendPatch`) and a "New pull request ▾ Send patch" dropdown replacing the PR list's plain new-PR button.
+- [x] `send_patch.rs` center panel: title + optional description + `git format-patch` paste area; submits through `RepoStore::open_pull_request` (no checkout, no `branch-name`/`merge-base`). Synchronous store errors (malformed/oversized patch, sign-in) keep the panel open with an inline error; the panel closes once the publish is underway.
+
+- [x] P1: `branch-name` tag + `r` EUC tag on PR creation; draft checkbox in the new-PR dialog (dialog since replaced by the panel above).
+- [x] P1: `RepoStore::update_pull_request` (kind 1619 + root-revision patch) with an author-only "Update" button on the PR detail header.
+- [x] P1: `latest_update` filters by PR author.
+- [x] P2: local checkout picker in the new-PR dialog (folder picker + source/target branches + Generate): `signed_git::{merge_base, format_patch_between, patch_applies}`; `merge-base` tag now published; best-effort apply check shown under the patch field (superseded by the panel's live compare view).
+- [x] P3: push tip to grasp servers under `refs/nostr/<event-id>` before publishing (from the local checkout); multi-commit series published as NIP-10-chained 1617 events with a 60 KB per-patch cap; PR list shows dismissible error/warning banners (incl. push failures).
+- [x] P4: merge status tags — `merge_pull_request` publishes 1631 with `applied-as-commits` + `r` per applied commit and `q`/`e`-reply tags per applied patch event.
+
+### Pull request follow-ups
+
+- [ ] GRASP-06 `/prs/<npub>/<id>.git` contributor endpoints + kind-10317 user grasp-list fallback.
+- [ ] Merge button in the PR detail view (`merge_pull_request` is store-only today), then fetch-and-merge (`merge-commit`) when the push backend is guaranteed.
+- [ ] Local-checkout generation for the update-PR dialog (currently paste-only).
+- [ ] Fork-aware compare in the New PR panel: today both branch selectors come from the user-picked local checkout, so a cross-fork PR (GitHub's "compare across forks") requires the fork's branch to exist locally. Add picking the fork repository from announced repos (its 30617 may point at this repo via the `u` tag, or share the EUC) + a branch, fetch it into the `GitCache` mirror, and run the `merge-base`/diff/`format-patch` flow against the base repo's mirror — like `choose_checkout` today but repo-driven.
 
 ## Performance: render path