diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5de0dd1f1..965d5ea07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ Docs: https://docs.clawd.bot
 - Channels: allow per-group tool allow/deny policies across built-in + plugin channels. (#1546) Thanks @adam91holt.
 
 ### Fixes
+- Skills: gate bird Homebrew install to macOS. (#1569) Thanks @bradleypriest.
 - Agents: ignore IDENTITY.md template placeholders when parsing identity to avoid placeholder replies. (#1556)
 - Docker: update gateway command in docker-compose and Hetzner guide. (#1514)
 - Sessions: reject array-backed session stores to prevent silent wipes. (#1469)
diff --git a/skills/bird/SKILL.md b/skills/bird/SKILL.md
index 307828472..8887b86fc 100644
--- a/skills/bird/SKILL.md
+++ b/skills/bird/SKILL.md
@@ -2,7 +2,7 @@
 name: bird
 description: X/Twitter CLI for reading, searching, posting, and engagement via cookies.
 homepage: https://bird.fast
-metadata: {"clawdbot":{"emoji":"🐦","requires":{"bins":["bird"]},"install":[{"id":"brew","kind":"brew","formula":"steipete/tap/bird","bins":["bird"],"label":"Install bird (brew)"},{"id":"npm","kind":"node","package":"@steipete/bird","bins":["bird"],"label":"Install bird (npm)"}]}}
+metadata: {"clawdbot":{"emoji":"🐦","requires":{"bins":["bird"]},"install":[{"id":"brew","kind":"brew","formula":"steipete/tap/bird","bins":["bird"],"label":"Install bird (brew)","os":["darwin"]},{"id":"npm","kind":"node","package":"@steipete/bird","bins":["bird"],"label":"Install bird (npm)"}]}}
 ---
 
 # bird 🐦