fix(extensions): update provides.hooks in 7 extension manifests to match actual registrations (#3157)

Audit found that 7 bundled extensions had incomplete provides.hooks
arrays in their manifests. Updated each to match actual pi.on() calls:

- async-jobs: +session_before_switch, session_shutdown
- bg-shell: +8 hooks (session_compact, session_tree, etc.)
- browser-tools: +session_start
- context7: +session_shutdown
- google-search: +session_shutdown
- gsd: +12 hooks (bash_transform, tool_call, tool_result, etc.)
- search-the-web: +session_start

Closes #3156

src/resources/extensions/async-jobs/extension-manifest.json

@@ -8,6 +8,6 @@
   "provides": {
     "tools": ["async_bash", "await_job", "cancel_job"],
     "commands": ["jobs"],
-    "hooks": ["session_start"]
+    "hooks": ["session_start", "session_before_switch", "session_shutdown"]
   }
 }

src/resources/extensions/bg-shell/extension-manifest.json

@@ -8,7 +8,7 @@
   "provides": {
     "tools": ["bg_shell"],
     "commands": ["bg"],
-    "hooks": ["session_shutdown"],
+    "hooks": ["session_shutdown", "session_compact", "session_tree", "session_switch", "before_agent_start", "session_start", "turn_end", "agent_end", "tool_execution_end"],
     "shortcuts": ["Ctrl+Alt+B"]
   }
 }

src/resources/extensions/browser-tools/extension-manifest.json

@@ -29,7 +29,7 @@
       "browser_visual_diff", "browser_zoom_region",
       "browser_generate_test", "browser_action_cache", "browser_check_injection"
     ],
-    "hooks": ["session_shutdown"]
+    "hooks": ["session_start", "session_shutdown"]
   },
   "dependencies": {
     "runtime": ["playwright"]

src/resources/extensions/context7/extension-manifest.json

@@ -7,6 +7,6 @@
   "requires": { "platform": ">=2.29.0" },
   "provides": {
     "tools": ["resolve_library", "get_library_docs"],
-    "hooks": ["session_start"]
+    "hooks": ["session_start", "session_shutdown"]
   }
 }

src/resources/extensions/google-search/extension-manifest.json

@@ -7,6 +7,6 @@
   "requires": { "platform": ">=2.29.0" },
   "provides": {
     "tools": ["google_search"],
-    "hooks": ["session_start"]
+    "hooks": ["session_start", "session_shutdown"]
   }
 }

src/resources/extensions/gsd/extension-manifest.json

@@ -12,7 +12,22 @@
       "gsd_requirement_update", "gsd_milestone_generate_id"
     ],
     "commands": ["gsd", "kill", "worktree", "exit"],
-    "hooks": ["session_start", "session_switch"],
+    "hooks": [
+      "session_start",
+      "session_switch",
+      "bash_transform",
+      "session_fork",
+      "before_agent_start",
+      "agent_end",
+      "session_before_compact",
+      "session_shutdown",
+      "tool_call",
+      "tool_result",
+      "tool_execution_start",
+      "tool_execution_end",
+      "model_select",
+      "before_provider_request"
+    ],
     "shortcuts": ["Ctrl+Alt+G"]
   }
 }

src/resources/extensions/search-the-web/extension-manifest.json

@@ -8,6 +8,6 @@
   "provides": {
     "tools": ["search-the-web", "fetch_page", "search_and_read", "web_search"],
     "commands": ["search-provider"],
-    "hooks": ["model_select", "before_provider_request"]
+    "hooks": ["session_start", "model_select", "before_provider_request"]
   }
 }