fix: hook version tracking, stale hook detection, stdin timeout, and session-report command (#1153, #1157, #1161, #1162) (#1163)

* fix: hook version tracking, stale hook detection, and stdin timeout increase

- Add gsd-hook-version header to all hook files for version tracking (#1153)
- Install.js now stamps current version into hooks during installation
- gsd-check-update.js detects stale hooks by comparing version headers
- gsd-statusline.js shows warning when stale hooks are detected
- Increase context monitor stdin timeout from 3s to 10s (#1162)
- Set +x permission on hook files during installation (#1162)

Fixes #1153, #1162, #1161

* feat: add /gsd:session-report command for post-session summary generation

Adds a new command that generates SESSION_REPORT.md with:
- Work performed summary (phases touched, commits, files changed)
- Key outcomes and decisions made
- Active blockers and open items
- Estimated resource usage metrics

Reports are written to .planning/reports/ with date-stamped filenames.

Closes #1157

* test: update expected skill count from 39 to 40 for new session-report command

hooks/gsd-check-update.js

@@ -1,4 +1,5 @@
 #!/usr/bin/env node
+// gsd-hook-version: {{GSD_VERSION}}
 // Check for GSD updates in background, write result to cache
 // Called by SessionStart hook - runs once per session
 
@@ -43,6 +44,7 @@ if (!fs.existsSync(cacheDir)) {
 // Run check in background (spawn background process, windowsHide prevents console flash)
 const child = spawn(process.execPath, ['-e', `
   const fs = require('fs');
+  const path = require('path');
   const { execSync } = require('child_process');
 
   const cacheFile = ${JSON.stringify(cacheFile)};
@@ -51,14 +53,43 @@ const child = spawn(process.execPath, ['-e', `
 
   // Check project directory first (local install), then global
   let installed = '0.0.0';
+  let configDir = '';
   try {
     if (fs.existsSync(projectVersionFile)) {
       installed = fs.readFileSync(projectVersionFile, 'utf8').trim();
+      configDir = path.dirname(path.dirname(projectVersionFile));
     } else if (fs.existsSync(globalVersionFile)) {
       installed = fs.readFileSync(globalVersionFile, 'utf8').trim();
+      configDir = path.dirname(path.dirname(globalVersionFile));
     }
   } catch (e) {}
 
+  // Check for stale hooks — compare hook version headers against installed VERSION
+  let staleHooks = [];
+  if (configDir) {
+    const hooksDir = path.join(configDir, 'hooks');
+    try {
+      if (fs.existsSync(hooksDir)) {
+        const hookFiles = fs.readdirSync(hooksDir).filter(f => f.endsWith('.js'));
+        for (const hookFile of hookFiles) {
+          try {
+            const content = fs.readFileSync(path.join(hooksDir, hookFile), 'utf8');
+            const versionMatch = content.match(/\\/\\/ gsd-hook-version:\\s*(.+)/);
+            if (versionMatch) {
+              const hookVersion = versionMatch[1].trim();
+              if (hookVersion !== installed && !hookVersion.includes('{{')) {
+                staleHooks.push({ file: hookFile, hookVersion, installedVersion: installed });
+              }
+            } else {
+              // No version header at all — definitely stale (pre-version-tracking)
+              staleHooks.push({ file: hookFile, hookVersion: 'unknown', installedVersion: installed });
+            }
+          } catch (e) {}
+        }
+      }
+    } catch (e) {}
+  }
+
   let latest = null;
   try {
     latest = execSync('npm view get-shit-done-cc version', { encoding: 'utf8', timeout: 10000, windowsHide: true }).trim();
@@ -68,7 +99,8 @@ const child = spawn(process.execPath, ['-e', `
     update_available: latest && installed !== latest,
     installed,
     latest: latest || 'unknown',
-    checked: Math.floor(Date.now() / 1000)
+    checked: Math.floor(Date.now() / 1000),
+    stale_hooks: staleHooks.length > 0 ? staleHooks : undefined
   };
 
   fs.writeFileSync(cacheFile, JSON.stringify(result));