feat(phase5): polish + deployment

- skill/SKILL.md: rewritten to 9 lines — 'status is automatic'
- deploy-to-agents.sh: no AGENTS.md injection; deploys hook + npm install
- install.sh: clean install flow; prints required env vars
- deploy/status-watcher.service: systemd unit file
- deploy/Dockerfile: containerized deployment (node:22-alpine)
- src/live-status.js: deprecation warning + start-watcher/stop-watcher pass-through
- README.md: full docs (architecture, install, config, upgrade guide, troubleshooting)
- make check: 0 errors, 0 format issues
- npm test: 59 unit + 36 integration = 95 tests passing

src/live-status.js

@@ -7,6 +7,14 @@ const http = require('http');
 const fs = require('fs');
 const path = require('path');
 
+// --- DEPRECATION WARNING ---
+// In v4, live-status CLI is deprecated. The status-watcher daemon handles
+// all updates automatically by tailing JSONL transcripts. You do not need
+// to call this tool manually. It remains available for backward compatibility.
+if (process.stderr.isTTY) {
+  console.error('NOTE: live-status CLI is deprecated as of v4. Status updates are now automatic.');
+}
+
 // --- PARSE ARGS ---
 const args = process.argv.slice(2);
 let command = null;
@@ -33,7 +41,12 @@ for (let i = 0; i < args.length; i++) {
     i++;
   } else if (arg === '--rich') {
     options.rich = true;
-  } else if (!command && ['create', 'update', 'complete', 'error', 'delete'].includes(arg)) {
+  } else if (
+    !command &&
+    ['create', 'update', 'complete', 'error', 'delete', 'start-watcher', 'stop-watcher'].includes(
+      arg,
+    )
+  ) {
     command = arg;
   } else {
     otherArgs.push(arg);
@@ -294,7 +307,17 @@ async function deletePost(postId) {
 }
 
 // --- CLI ROUTER ---
-if (command === 'create') {
+if (command === 'start-watcher' || command === 'stop-watcher') {
+  // Pass-through to watcher-manager.js
+  const { spawnSync } = require('child_process');
+  const watcherPath = path.join(__dirname, 'watcher-manager.js');
+  const subCmd = command === 'start-watcher' ? 'start' : 'stop';
+  const result = spawnSync(process.execPath, [watcherPath, subCmd], {
+    stdio: 'inherit',
+    env: process.env,
+  });
+  process.exit(result.status || 0);
+} else if (command === 'create') {
   createPost(otherArgs.join(' '), 'create');
 } else if (command === 'update') {
   updatePost(otherArgs[0], otherArgs.slice(1).join(' '), 'update');
@@ -311,6 +334,8 @@ if (command === 'create') {
   console.log('  live-status [options] complete <id> <text>');
   console.log('  live-status [options] error <id> <text>');
   console.log('  live-status [options] delete <id>');
+  console.log('  live-status start-watcher   (pass-through to watcher-manager start)');
+  console.log('  live-status stop-watcher    (pass-through to watcher-manager stop)');
   console.log('');
   console.log('Options:');
   console.log('  --rich             Use rich message attachments (colored cards)');