• Fix: LLM empty choices / None message guard — Gemini and other providers return choices=[] on content-filtered HTTP 200 responses; now raises a clean error instead of crashing with IndexError (#924)
• Fix: OpenCode skill removed invalid general-purpose agent reference and headless-incompatible interactive halt (#911, closes #825)
• Fix: Codex skill now uses graphify query/explain/path even when graph artifacts are dirty in worktree (#913, closes #860)
• Perf: precompute degrees once in surprise scoring — ~11x speedup per lookup on large graphs (#914)