feat(agent-manager): sync worktree branch from git worktree list (#8534)

Piggyback on the existing `git worktree list --porcelain` call in
probeWorktreePresence to detect branch changes (e.g. after checking
out a PR branch). Zero additional git calls — the branch info was
already returned but discarded.

packages/kilo-vscode/src/agent-manager/AgentManagerProvider.ts

@@ -695,11 +695,11 @@ export class AgentManagerProvider implements Disposable {
     this.pushState()
     // Disk removal after state is clean — pollers no longer reference this worktree.
     try {
-      await manager.removeWorktree(worktree.path, worktree.branch)
+      await manager.removeWorktree(worktree.path, worktree.originalBranch ?? worktree.branch)
     } catch (error) {
       this.log(`Failed to remove worktree from disk: ${error}`)
     }
-    this.log(`Deleted worktree ${worktreeId} (${worktree.branch})`)
+    this.log(`Deleted worktree ${worktreeId} (${worktree.originalBranch ?? worktree.branch})`)
     return null
   }
 
@@ -1444,12 +1444,20 @@ export class AgentManagerProvider implements Disposable {
     const entries = result.worktrees.filter((item) => ids.has(item.worktreeId))
     if (entries.length === 0) return
 
+    // Sync branches from git worktree list (no extra git calls)
+    let branchChanged = false
+    for (const entry of entries) {
+      if (entry.branch && state.updateWorktreeBranch(entry.worktreeId, entry.branch)) {
+        branchChanged = true
+      }
+    }
+
     const next = new Set(entries.filter((entry) => entry.missing).map((entry) => entry.worktreeId))
-    const changed =
+    const staleChanged =
       next.size !== this.staleWorktreeIds.size || [...next].some((worktreeId) => !this.staleWorktreeIds.has(worktreeId))
     this.staleWorktreeIds = next
 
-    if (changed) {
+    if (staleChanged || branchChanged) {
       this.pushState()
     }
   }

packages/kilo-vscode/src/agent-manager/GitOps.ts

@@ -130,14 +130,14 @@ export class GitOps {
   }
 
   /** Return the set of worktree paths for the repo, excluding bare entries. */
-  async listWorktreePaths(cwd: string): Promise<Set<string>> {
+  async listWorktreePaths(cwd: string): Promise<Map<string, string>> {
     const raw = await this.raw(["worktree", "list", "--porcelain"], cwd)
-    const paths = new Set<string>()
+    const result = new Map<string, string>()
     for (const entry of parseWorktreeList(raw)) {
       if (entry.bare) continue
-      paths.add(normalizePath(entry.path))
+      result.set(normalizePath(entry.path), entry.branch)
     }
-    return paths
+    return result
   }
 
   /**

packages/kilo-vscode/src/agent-manager/GitStatsPoller.ts

@@ -26,6 +26,8 @@ export interface LocalStats {
 export interface WorktreePresence {
   worktreeId: string
   missing: boolean
+  /** Current branch from `git worktree list`, if available. */
+  branch?: string
 }
 
 export interface WorktreePresenceResult {
@@ -231,7 +233,8 @@ export class GitStatsPoller {
           () => false,
         )
         const missing = !exists || !tracked.has(normalized)
-        return { worktreeId: wt.id, missing }
+        const branch = tracked.get(normalized)
+        return { worktreeId: wt.id, missing, branch }
       }),
     )
 

packages/kilo-vscode/src/agent-manager/WorktreeStateManager.ts

@@ -32,6 +32,9 @@ export interface Worktree {
   prUrl?: string
   /** Cached PR state for correct badge color on reload (open/merged/closed/draft). */
   prState?: string
+  /** Original branch created with the worktree, used for cleanup on deletion.
+   *  Set automatically when `branch` is updated via live sync. */
+  originalBranch?: string
 }
 
 /**
@@ -169,6 +172,16 @@ export class WorktreeStateManager {
     return wt
   }
 
+  updateWorktreeBranch(id: string, branch: string): boolean {
+    const wt = this.worktrees.get(id)
+    if (!wt || wt.branch === branch) return false
+    if (!wt.originalBranch) wt.originalBranch = wt.branch
+    this.log(`Updated worktree ${id} branch: ${wt.branch} → ${branch}`)
+    wt.branch = branch
+    void this.save()
+    return true
+  }
+
   updateWorktreeLabel(id: string, label: string): void {
     const wt = this.worktrees.get(id)
     if (!wt) return

packages/kilo-vscode/tests/unit/git-stats-poller.test.ts

@@ -3,7 +3,7 @@ import * as fs from "fs"
 import * as os from "os"
 import * as path from "path"
 import type { KiloClient } from "@kilocode/sdk/v2/client"
-import { GitStatsPoller } from "../../src/agent-manager/GitStatsPoller"
+import { GitStatsPoller, type WorktreePresenceResult } from "../../src/agent-manager/GitStatsPoller"
 import { GitOps } from "../../src/agent-manager/GitOps"
 import type { Worktree } from "../../src/agent-manager/WorktreeStateManager"
 
@@ -128,7 +128,7 @@ describe("GitStatsPoller", () => {
     const wtPath = path.join(root, "wt-a")
     fs.mkdirSync(wtPath, { recursive: true })
 
-    const presence: Array<{ worktrees: Array<{ worktreeId: string; missing: boolean }>; degraded: boolean }> = []
+    const presence: WorktreePresenceResult[] = []
 
     const poller = new GitStatsPoller({
       getWorktrees: () => [{ ...worktree("a"), path: wtPath }],
@@ -154,7 +154,10 @@ describe("GitStatsPoller", () => {
     poller.stop()
     fs.rmSync(root, { recursive: true, force: true })
 
-    expect(presence[0]).toEqual({ worktrees: [{ worktreeId: "a", missing: false }], degraded: false })
+    expect(presence[0]).toEqual({
+      worktrees: [{ worktreeId: "a", missing: false, branch: "branch-a" }],
+      degraded: false,
+    })
   })
 
   it("emits degraded probe when git worktree listing fails", async () => {
@@ -162,7 +165,7 @@ describe("GitStatsPoller", () => {
     const wtPath = path.join(root, "wt-a")
     fs.mkdirSync(wtPath, { recursive: true })
 
-    const presence: Array<{ worktrees: Array<{ worktreeId: string; missing: boolean }>; degraded: boolean }> = []
+    const presence: WorktreePresenceResult[] = []
 
     const poller = new GitStatsPoller({
       getWorktrees: () => [{ ...worktree("a"), path: wtPath }],
@@ -199,7 +202,7 @@ describe("GitStatsPoller", () => {
 
     const calls: string[] = []
     const emitted: Array<Array<{ worktreeId: string; additions: number; deletions: number; commits: number }>> = []
-    const presence: Array<{ worktrees: Array<{ worktreeId: string; missing: boolean }>; degraded: boolean }> = []
+    const presence: WorktreePresenceResult[] = []
 
     const client = {
       worktree: {
@@ -240,8 +243,8 @@ describe("GitStatsPoller", () => {
     expect(calls.some((cwd) => cwd === wtBPath)).toBe(false)
     expect(presence[0]).toEqual({
       worktrees: [
-        { worktreeId: "a", missing: false },
-        { worktreeId: "b", missing: true },
+        { worktreeId: "a", missing: false, branch: "branch-a" },
+        { worktreeId: "b", missing: true, branch: undefined },
       ],
       degraded: false,
     })