## Status: ✅ Complete\n\n**Branch:** `feature/prompt-cache` | **Combined:** `feature/combined-bastion` | **Tests:** 6 | **Upstream PR:** pending\n\n## Summary\nWire existing `PromptCacheState` into server endpoints. Skips ~15K token system prompt re-prefill on follow-up turns (~35s → ~2-3s).
Status: ✅ Complete\n\nBranch:
feature/prompt-cache| Combined:feature/combined-bastion| Tests: 6 | Upstream PR: pending\n\n## Summary\nWire existingPromptCacheStateinto server endpoints. Skips ~15K token system prompt re-prefill on follow-up turns (~35s → ~2-3s).