feat: add diff stats and archive actions to workspace sidebar

packages/server/src/server/agent/providers/claude-agent.ts

@@ -1415,6 +1415,16 @@ export class ClaudeAgentClient implements AgentClient {
     } catch {
       this.claudePath = null;
     }
+    if (this.claudePath) {
+      try {
+        const version = execSync(`${this.claudePath} --version`, { encoding: "utf8" }).trim();
+        this.logger.info({ claudePath: this.claudePath, version }, "Resolved Claude binary");
+      } catch {
+        this.logger.info({ claudePath: this.claudePath }, "Resolved Claude binary (version unknown)");
+      }
+    } else {
+      this.logger.warn("Claude binary not found via 'which claude'; SDK will use bundled binary");
+    }
   }
 
   async createSession(config: AgentSessionConfig): Promise<AgentSession> {

packages/server/src/server/session.ts

@@ -137,6 +137,7 @@ import {
 import { createAgentWorktree, runAsyncWorktreeBootstrap } from './worktree-bootstrap.js'
 import {
   getCheckoutDiff,
+  getCheckoutShortstat,
   getCheckoutStatus,
   listBranchSuggestions,
   NotGitRepoError,
@@ -5253,6 +5254,13 @@ export class Session {
       // Fall back to the persisted label if checkout metadata is unavailable.
     }
 
+    let diffStat: { additions: number; deletions: number } | null = null
+    try {
+      diffStat = await getCheckoutShortstat(workspace.cwd)
+    } catch {
+      // Non-critical — leave null on failure.
+    }
+
     return {
       id: workspace.workspaceId,
       projectId: workspace.projectId,
@@ -5263,6 +5271,7 @@ export class Session {
       name: displayName,
       status: 'done',
       activityAt: null,
+      diffStat,
     }
   }
 

packages/server/src/shared/messages.ts

@@ -1490,6 +1490,10 @@ export const WorkspaceDescriptorPayloadSchema = z.object({
   name: z.string(),
   status: WorkspaceStateBucketSchema,
   activityAt: z.string().nullable(),
+  diffStat: z.object({
+    additions: z.number(),
+    deletions: z.number(),
+  }).nullable().optional(),
 })
 
 export const AgentUpdateMessageSchema = z.object({

packages/server/src/utils/checkout-git.ts

@@ -1087,6 +1087,77 @@ export async function getCheckoutStatusLite(
   };
 }
 
+export interface CheckoutShortstat {
+  additions: number;
+  deletions: number;
+}
+
+export async function getCheckoutShortstat(
+  cwd: string,
+  context?: CheckoutContext
+): Promise<CheckoutShortstat | null> {
+  try {
+    await requireGitRepo(cwd);
+  } catch {
+    return null;
+  }
+
+  const configured = await getConfiguredBaseRefForCwd(cwd, context);
+  const baseRef = configured.baseRef ?? (await resolveBaseRef(cwd));
+  if (!baseRef) {
+    return null;
+  }
+
+  const currentBranch = await getCurrentBranch(cwd);
+  if (currentBranch === baseRef) {
+    return null;
+  }
+
+  let mergeBase: string;
+  try {
+    const { stdout } = await execAsync(`git merge-base HEAD ${baseRef}`, {
+      cwd,
+      env: READ_ONLY_GIT_ENV,
+    });
+    mergeBase = stdout.trim();
+    if (!mergeBase) {
+      return null;
+    }
+  } catch {
+    return null;
+  }
+
+  try {
+    const { stdout } = await execAsync(`git diff --shortstat ${mergeBase}`, {
+      cwd,
+      env: READ_ONLY_GIT_ENV,
+    });
+    const text = stdout.trim();
+    if (!text) {
+      return null;
+    }
+
+    let additions = 0;
+    let deletions = 0;
+    const addMatch = text.match(/(\d+)\s+insertion/);
+    if (addMatch) {
+      additions = Number.parseInt(addMatch[1]!, 10);
+    }
+    const delMatch = text.match(/(\d+)\s+deletion/);
+    if (delMatch) {
+      deletions = Number.parseInt(delMatch[1]!, 10);
+    }
+
+    if (additions === 0 && deletions === 0) {
+      return null;
+    }
+
+    return { additions, deletions };
+  } catch {
+    return null;
+  }
+}
+
 export async function getCheckoutDiff(
   cwd: string,
   compare: CheckoutDiffCompare,