fix: stale sessions permanently ignored + CLI missing custom post type

Two bugs fixed:

1. Session monitor stale session bug: Sessions that were stale on first
   poll got added to _knownSessions but never re-checked, even after
   their transcript became active. Now stale sessions are tracked
   separately in _staleSessions and re-checked on every poll cycle.

2. CLI live-status tool: create/update commands were creating plain text
   posts without the custom_livestatus post type or plugin props. The
   Mattermost webapp plugin only renders posts with type=custom_livestatus.
   Now all CLI commands set the correct post type and livestatus props.

src/live-status.js

@@ -242,15 +242,37 @@ async function createPost(text, cmd) {
     process.exit(1);
   }
   try {
+    const agentName = options.agent || 'unknown';
+    const statusMap = { create: 'running', update: 'running', complete: 'complete', error: 'error' };
+    const cmdKey = cmd || 'create';
     let payload;
     if (options.rich) {
       payload = {
         channel_id: CONFIG.channel_id,
-        message: '',
-        props: { attachments: [buildAttachment(cmd || 'create', text)] },
+        message: text,
+        type: 'custom_livestatus',
+        props: {
+          attachments: [buildAttachment(cmdKey, text)],
+          livestatus: {
+            agent_id: agentName,
+            status: statusMap[cmdKey] || 'running', // eslint-disable-line security/detect-object-injection
+            lines: text.split('\n'),
+          },
+        },
       };
     } else {
-      payload = { channel_id: CONFIG.channel_id, message: text };
+      payload = {
+        channel_id: CONFIG.channel_id,
+        message: text,
+        type: 'custom_livestatus',
+        props: {
+          livestatus: {
+            agent_id: agentName,
+            status: statusMap[cmdKey] || 'running', // eslint-disable-line security/detect-object-injection
+            lines: text.split('\n'),
+          },
+        },
+      };
     }
     if (options.replyTo) payload.root_id = options.replyTo;
     const result = await request('POST', '/posts', payload);
@@ -271,18 +293,26 @@ async function updatePost(postId, text, cmd) {
     process.exit(1);
   }
   try {
+    const agentName = options.agent || 'unknown';
+    const statusMap = { create: 'running', update: 'running', complete: 'complete', error: 'error' };
+    const cmdKey = cmd || 'update';
+    const livestatusProps = {
+      agent_id: agentName,
+      status: statusMap[cmdKey] || 'running', // eslint-disable-line security/detect-object-injection
+      lines: text.split('\n'),
+    };
+
     if (options.rich) {
       await request('PUT', `/posts/${postId}`, {
         id: postId,
-        message: '',
-        props: { attachments: [buildAttachment(cmd || 'update', text)] },
+        message: text,
+        props: { attachments: [buildAttachment(cmdKey, text)], livestatus: livestatusProps },
       });
     } else {
-      const current = await request('GET', `/posts/${postId}`);
       await request('PUT', `/posts/${postId}`, {
         id: postId,
         message: text,
-        props: current.props,
+        props: { livestatus: livestatusProps },
       });
     }
     console.log('updated');

src/session-monitor.js

@@ -46,6 +46,8 @@ class SessionMonitor extends EventEmitter {
 
     // Map<sessionKey, sessionEntry>
     this._knownSessions = new Map();
+    // Set<sessionKey> — sessions that were skipped as stale; re-check on next poll
+    this._staleSessions = new Set();
     // Cache: "user:XXXX" -> channelId (resolved DM channels)
     this._dmChannelCache = new Map();
     this._pollTimer = null;
@@ -175,6 +177,8 @@ class SessionMonitor extends EventEmitter {
     if (dmIdx >= 0 && parts[dmIdx + 1]) {
       return parts[dmIdx + 1]; // eslint-disable-line security/detect-object-injection
     }
+    // agent:main:mattermost:direct:USER_ID — DM sessions use "direct" prefix
+    // Channel ID must be resolved via API (returns null here; resolveChannelFromEntry handles it)
     return null;
   }
 
@@ -343,9 +347,9 @@ class SessionMonitor extends EventEmitter {
       }
     }
 
-    // Detect added sessions
+    // Detect new or previously-stale sessions
     for (const [sessionKey, entry] of currentSessions) {
-      if (!this._knownSessions.has(sessionKey)) {
+      if (!this._knownSessions.has(sessionKey) || this._staleSessions.has(sessionKey)) {
         this._onSessionAdded(entry);
       }
     }
@@ -354,6 +358,14 @@ class SessionMonitor extends EventEmitter {
     for (const [sessionKey] of this._knownSessions) {
       if (!currentSessions.has(sessionKey)) {
         this._onSessionRemoved(sessionKey);
+        this._staleSessions.delete(sessionKey);
+      }
+    }
+
+    // Clean up stale entries for sessions no longer in sessions.json
+    for (const sessionKey of this._staleSessions) {
+      if (!currentSessions.has(sessionKey)) {
+        this._staleSessions.delete(sessionKey);
       }
     }
 
@@ -374,13 +386,16 @@ class SessionMonitor extends EventEmitter {
     }
 
     // Skip stale sessions — only track if transcript was modified in last 5 minutes
-    // This prevents creating status boxes for every old session in sessions.json
+    // This prevents creating status boxes for every old session in sessions.json.
+    // Stale sessions are tracked in _staleSessions and re-checked on every poll
+    // so they get picked up as soon as the transcript becomes active again.
     try {
       // eslint-disable-next-line security/detect-non-literal-fs-filename
       const stat = fs.statSync(transcriptFile);
       const ageMs = Date.now() - stat.mtimeMs;
       const STALE_THRESHOLD_MS = 5 * 60 * 1000; // 5 minutes
       if (ageMs > STALE_THRESHOLD_MS) {
+        this._staleSessions.add(sessionKey);
         if (this.logger) {
           this.logger.debug(
             { sessionKey, ageS: Math.floor(ageMs / 1000) },
@@ -390,7 +405,8 @@ class SessionMonitor extends EventEmitter {
         return;
       }
     } catch (_e) {
-      // File doesn't exist — skip silently
+      // File doesn't exist — skip silently but track as stale for re-check
+      this._staleSessions.add(sessionKey);
       if (this.logger) {
         this.logger.debug(
           { sessionKey, transcriptFile },
@@ -400,6 +416,9 @@ class SessionMonitor extends EventEmitter {
       return;
     }
 
+    // Session is fresh — remove from stale tracking
+    this._staleSessions.delete(sessionKey);
+
     // Sub-agents always pass through — they inherit parent channel via watcher-manager
     const isSubAgent = !!spawnedBy;