chore(cli-v2): un-ignore CLI source tree for binary release workflow

The CLI source (242 files, ~14k lines) was gitignored during the
earlier cli→cli-v2 reorg so only the published npm package carried it.
That blocks the GitHub Actions release workflow (release-cli.yml),
which clones the repo fresh on each runner and needs the source to
compile binaries via `bun build --compile`.

Moves the gitignore from root-level to `apps/cli-v2/.gitignore` with
only the usual build artefacts excluded (node_modules, dist, .turbo,
.cache). Source is now in git at apps/cli-v2/src/.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/cli-v2/src/commands/hook.ts

@@ -0,0 +1,123 @@
+/**
+ * `claudemesh hook <status>` — Claude Code hook handler.
+ *
+ * Registered as a Stop + UserPromptSubmit hook by `claudemesh install`.
+ * On each turn boundary, Claude Code invokes:
+ *
+ *   Stop              → `claudemesh hook idle`
+ *   UserPromptSubmit  → `claudemesh hook working`
+ *
+ * We read the Claude Code hook JSON payload from stdin (contains cwd +
+ * session_id), then POST `/hook/set-status` to EVERY joined mesh's
+ * broker with {cwd, pid, status, session_id}. Each broker looks up
+ * its local presence row by (pid, cwd) and updates status.
+ *
+ * Fire-and-forget, silent. Hooks must NEVER block Claude Code or
+ * surface errors to the user. Debug logging available via
+ * CLAUDEMESH_HOOK_DEBUG=1.
+ *
+ * Why send to every broker? A user joined to multiple meshes has
+ * one presence row per mesh, each on its own broker. A turn boundary
+ * updates the status on every broker where this session is active.
+ * Brokers that don't have a matching presence just queue the signal
+ * in pending_status (harmless, TTL-swept).
+ */
+
+import { readConfig } from "~/services/config/facade.js";
+
+const DEBUG = process.env.CLAUDEMESH_HOOK_DEBUG === "1";
+
+function debug(msg: string): void {
+  if (DEBUG) console.error(`[claudemesh-hook] ${msg}`);
+}
+
+/** WS URL → HTTP URL (same host, swap scheme). */
+function wsToHttp(wsUrl: string): string {
+  try {
+    const u = new URL(wsUrl);
+    const httpScheme = u.protocol === "wss:" ? "https:" : "http:";
+    return `${httpScheme}//${u.host}`;
+  } catch {
+    return wsUrl;
+  }
+}
+
+async function readStdinJson(): Promise<Record<string, unknown>> {
+  if (process.stdin.isTTY) return {};
+  const chunks: Uint8Array[] = [];
+  const reader = process.stdin;
+  try {
+    for await (const chunk of reader) {
+      chunks.push(chunk as Uint8Array);
+      if (chunks.reduce((n, c) => n + c.length, 0) > 256 * 1024) break;
+    }
+    const raw = Buffer.concat(chunks).toString("utf-8").trim();
+    if (!raw) return {};
+    return JSON.parse(raw) as Record<string, unknown>;
+  } catch {
+    return {};
+  }
+}
+
+async function postHook(
+  brokerWsUrl: string,
+  body: Record<string, unknown>,
+): Promise<void> {
+  const base = wsToHttp(brokerWsUrl);
+  try {
+    const controller = new AbortController();
+    const t = setTimeout(() => controller.abort(), 1000);
+    await fetch(`${base}/hook/set-status`, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify(body),
+      signal: controller.signal,
+    }).finally(() => clearTimeout(t));
+  } catch (e) {
+    debug(`post failed ${base}: ${e instanceof Error ? e.message : e}`);
+  }
+}
+
+export async function runHook(args: string[]): Promise<void> {
+  const status = args[0];
+  if (!status || !["idle", "working", "dnd"].includes(status)) {
+    // Silent no-op — we never want a hook to surface an error.
+    process.exit(0);
+  }
+
+  // Read Claude Code's stdin payload for cwd + session_id.
+  const stdinTimeout = new Promise<Record<string, unknown>>((r) =>
+    setTimeout(() => r({}), 500),
+  );
+  const payload = await Promise.race([readStdinJson(), stdinTimeout]);
+  const cwd =
+    (typeof payload.cwd === "string" && payload.cwd) ||
+    process.env.CLAUDE_PROJECT_DIR ||
+    process.cwd();
+  const sessionId =
+    (typeof payload.session_id === "string" && payload.session_id) || "";
+
+  // Fan out to EVERY joined mesh's broker in parallel.
+  let config;
+  try {
+    config = readConfig();
+  } catch (e) {
+    debug(`config load failed: ${e instanceof Error ? e.message : e}`);
+    process.exit(0);
+  }
+  if (config.meshes.length === 0) {
+    debug("no joined meshes, nothing to do");
+    process.exit(0);
+  }
+
+  const body = { cwd, pid: process.ppid, status, session_id: sessionId };
+  debug(
+    `status=${status} cwd=${cwd} meshes=${config.meshes.length} session=${sessionId.slice(0, 8)}`,
+  );
+
+  // Dedupe by brokerUrl — if multiple meshes share a broker, one POST
+  // covers them (broker resolves presence by cwd+pid regardless).
+  const brokerUrls = [...new Set(config.meshes.map((m) => m.brokerUrl))];
+  await Promise.all(brokerUrls.map((url) => postHook(url, body)));
+  process.exit(0);
+}