tooling: adopt procoder governance (commit gate, skill integration, context) + remove committed AGENT_API_KEY from docs

.procoder/context.md

@@ -0,0 +1,13 @@
+# Context — anwarpy.ai
+
+## effective access
+
+The single server-side decision (launch.ts policy + doc.access + doc.status) consumed identically by the article page, public JSON route, download gate, and llms-full.
+
+## ghost-read
+
+Fetching an intended-VIP post logged out to assert what a stranger sees; the acceptance check for any access-logic change.
+
+## honest 503
+
+A dependency-down response with a fixed Arabic sentence (e.g. billing disabled, mail transport down) instead of a fake success; reference implementation: /api/notify.