docs(notes): document bead bf-4co completion - README fixes already done in a106abd

notes/bf-4co.md

@@ -0,0 +1,30 @@
+# Bead bf-4co: README.md Fixes Already Completed
+
+This bead's requirements were already satisfied by commit `a106abd` on 2026-07-02:
+
+```
+commit a106abd09d21db8f2bf728f2f5d6d6762faed512
+Author: jedarden <me@jedcabanero.com>
+Date:   Thu Jul 2 07:47:43 2026 -0400
+
+    docs(readme): fix metric names, dashboard port, and env var defaults
+    
+    - Fix metric names to use zai_proxy_ prefix (matching proxy/metrics.go)
+    - Fix dashboard port from :3000 to :8080 (matching DefaultConfig)
+    - Fix env var defaults: RATE_LIMIT_INITIAL=10.0, RATE_LIMIT_MIN=1.0, RATE_LIMIT_MAX=50.0, MAX_RETRIES=3
+    - Add missing RATE_LIMIT_* tunables: CEILING_ALPHA=0.3, HOLD_MARGIN=0.02, PROBE_INTERVAL=10
+    - Fix ZAI_TARGET_URL default to https://api.z.ai/api/anthropic
+    - Update description to reflect Z.AI-specific implementation (not OpenAI-compatible)
+```
+
+## Verification
+
+All acceptance criteria met:
+
+- ✓ Every metric name in README.md matches a Name: field in proxy/metrics.go
+- ✓ Ports and env defaults in README.md match proxy/main.go and dashboard/api/router.go  
+- ✓ The three RATE_LIMIT_* tunables (CEILING_ALPHA, HOLD_MARGIN, PROBE_INTERVAL) appear in the env table with correct defaults
+- ✓ No claim that the proxy is generic/OpenAI-compatible
+- ✓ Doc-only change; no code changes
+
+No additional work required.