v3.10.12: sticky endpoint, parallel discovery, anti-stall, smart errors, missing headers

CHANGELOG.md

@@ -1,5 +1,27 @@
 # Changelog
 
+## v3.10.12 (2026-05-26)
+
+**Sticky Endpoint, Parallel Discovery, Smart Errors, Anti-Stall**
+
+### New Features
+- **Sticky endpoint caching**: remembers which endpoint last succeeded, reuses it on every subsequent request (zero probe overhead)
+- **Parallel endpoint discovery**: probes ALL endpoints simultaneously, first 200 wins and is cached
+- **Automatic re-probe**: if the sticky endpoint fails (429/502/503), cache is cleared and all endpoints are probed in parallel again
+- **Endpoint order swapped**: `daily-cloudcode-pa` tried first (matches agy-core behavior), `cloudcode-pa` as fallback
+- **Anti-stall engine**: kills stale proxy processes and clears `__pycache__` on every new session start
+- **Smart error classification**: distinguishes `quota_exhausted` vs `capacity_exhausted` vs `account_banned` vs `validation_required` vs `service_disabled` vs `auth_permanent`
+- **Rate limit reset time parsing**: extracts cooldown from error body (`quotaResetDelay`, `Resets in ~1h27m`, etc.) for accurate cooldown
+- **Missing Antigravity headers**: `X-Client-Name`, `X-Client-Version`, `x-goog-api-client`, platform-aware `User-Agent`
+- **Session ID**: added `sessionId` to request wrapper for proper session tracking
+
+### How It Works
+1. First request: parallel probe → daily-cloudcode-pa and cloudcode-pa hit simultaneously → first 200 wins, cached
+2. All subsequent requests: goes straight to cached endpoint (no probing)
+3. If cached endpoint returns 429: cache cleared, parallel re-probe
+4. If cached endpoint returns 400/403: error returned to client immediately
+5. On startup: anti-stall kills all stale translate-proxy processes, clears pycache
+
 ## v3.10.11 (2026-05-26)
 
 **Hybrid Endpoint Fallback — Redundant Antigravity Endpoints**