fix: comprehensive BlueBubbles and channel cleanup (#11093)

* feat(bluebubbles): auto-strip markdown from outbound messages (#7402)

* fix(security): add timeout to webhook body reading (#6762)

Adds 30-second timeout to readBody() in voice-call, bluebubbles, and nostr
webhook handlers. Prevents Slow-Loris DoS (CWE-400, CVSS 7.5).
Merged with existing maxBytes protection in voice-call.

* fix(security): unify Error objects and lint fixes in webhook timeouts (#6762)

* fix: prevent plugins from auto-enabling without user consent (#3961)

Changes default plugin enabled state from true to false in enablePluginEntry().
Preserves existing enabled:true values. Fixes #3932.

* fix: apply hierarchical mediaMaxMb config to all channels (#8749)

Generalizes resolveAttachmentMaxBytes() to use account → channel → global
config resolution for all channels, not just BlueBubbles. Fixes #7847.

* fix(bluebubbles): sanitize attachment filenames against header injection (#10333)

Strip ", \r, \n, and \\ from filenames after path.basename() to prevent
multipart Content-Disposition header injection (CWE-93, CVSS 5.4).
Also adds sanitization to setGroupIconBlueBubbles which had zero filename
sanitization.

* fix(lint): exclude extensions/ from Oxlint preflight check (#9313)

Extensions use PluginRuntime|null patterns that trigger
no-redundant-type-constituents because PluginRuntime resolves to any.
Excluding extensions/ from Oxlint unblocks user upgrades.
Re-applies the approach from closed PR #10087.

* fix(bluebubbles): add tempGuid to createNewChatWithMessage payload (#7745)

Non-Private-API mode (AppleScript) requires tempGuid in send payloads.
The main sendMessageBlueBubbles already had it, but createNewChatWithMessage
was missing it, causing 400 errors for new chat creation without Private API.

* fix: send stop-typing signal when run ends with NO_REPLY (#8785)

Adds onCleanup callback to the typing controller that fires when the
controller is cleaned up while typing was active (e.g., after NO_REPLY).
Channels using createTypingCallbacks automatically get stop-typing on
cleanup. This prevents the typing indicator from lingering in group chats
when the agent decides not to reply.

* fix(telegram): deduplicate skill commands in multi-agent setup (#5717)

Two fixes:
1. Skip duplicate workspace dirs when listing skill commands across agents.
   Multiple agents sharing the same workspace would produce duplicate commands
   with _2, _3 suffixes.
2. Clear stale commands via deleteMyCommands before registering new ones.
   Commands from deleted skills now get cleaned up on restart.

* fix: add size limits to unbounded in-memory caches (#4948)

Adds max-size caps with oldest-entry eviction to prevent OOM in
long-running deployments:
- BlueBubbles serverInfoCache: 64 entries (already has TTL)
- Google Chat authCache: 32 entries
- Matrix directRoomCache: 1024 entries
- Discord presenceCache: 5000 entries per account

* fix: address review concerns (#11093)

- Chain deleteMyCommands → setMyCommands to prevent race condition (#5717)
- Rename enablePluginEntry to registerPluginEntry (now sets enabled: false)
- Add Slow-Loris timeout test for readJsonBody (#6023)

extensions/googlechat/src/auth.ts

@@ -8,6 +8,8 @@ const ADDON_ISSUER_PATTERN = /^service-\d+@gcp-sa-gsuiteaddons\.iam\.gserviceacc
 const CHAT_CERTS_URL =
   "https://www.googleapis.com/service_accounts/v1/metadata/x509/chat@system.gserviceaccount.com";
 
+// Size-capped to prevent unbounded growth in long-running deployments (#4948)
+const MAX_AUTH_CACHE_SIZE = 32;
 const authCache = new Map<string, { key: string; auth: GoogleAuth }>();
 const verifyClient = new OAuth2Client();
 
@@ -30,20 +32,32 @@ function getAuthInstance(account: ResolvedGoogleChatAccount): GoogleAuth {
     return cached.auth;
   }
 
+  const evictOldest = () => {
+    if (authCache.size > MAX_AUTH_CACHE_SIZE) {
+      const oldest = authCache.keys().next().value;
+      if (oldest !== undefined) {
+        authCache.delete(oldest);
+      }
+    }
+  };
+
   if (account.credentialsFile) {
     const auth = new GoogleAuth({ keyFile: account.credentialsFile, scopes: [CHAT_SCOPE] });
     authCache.set(account.accountId, { key, auth });
+    evictOldest();
     return auth;
   }
 
   if (account.credentials) {
     const auth = new GoogleAuth({ credentials: account.credentials, scopes: [CHAT_SCOPE] });
     authCache.set(account.accountId, { key, auth });
+    evictOldest();
     return auth;
   }
 
   const auth = new GoogleAuth({ scopes: [CHAT_SCOPE] });
   authCache.set(account.accountId, { key, auth });
+  evictOldest();
   return auth;
 }