chore(skills): remove bird skill

docs/tools/browser-login.md

@@ -34,8 +34,7 @@ If you have multiple profiles, pass `--browser-profile <name>` (the default is `
 
 ## X/Twitter: recommended flow
 
-- **Read/search/threads:** use the **bird** CLI skill (no browser, stable).
-  - Repo: [https://github.com/steipete/bird](https://github.com/steipete/bird)
+- **Read/search/threads:** use the **host** browser (manual login).
 - **Post updates:** use the **host** browser (manual login).
 
 ## Sandboxing + host browser access

docs/tools/exec-approvals.md

@@ -102,7 +102,7 @@ Legacy `agents.default` entries are migrated to `agents.main` on load.
 
 Examples:
 
-- `~/Projects/**/bin/bird`
+- `~/Projects/**/bin/peekaboo`
 - `~/.local/bin/*`
 - `/opt/homebrew/bin/rg`