11da8b1fbf
Replace per-call gemini CLI spawning (~10s cold start each time) with persistent ACP (Agent Client Protocol) subprocess. First call absorbs the cold start, subsequent calls are near-instant over JSON-RPC stdio. - Add AcpClient: manages persistent gemini --experimental-acp subprocess with lazy init, auto-restart on crash/timeout, NDJSON framing - Add GeminiAcpProvider: LlmProvider wrapper with serial queue for concurrent calls, same interface as GeminiCliProvider - Add dispose() to LlmProvider interface + disposeAll() to registry - Wire provider disposal into mcplocal shutdown handler - Add status command spinner with progressive output and color-coded LLM health check results (green checkmark/red cross) - 25 new tests (17 ACP client + 8 provider) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>