Fix: Context pressure gates prevent thinking block API errors
When extended thinking is active and Token Optimizer hooks inject system content, cumulative injection can trigger API 400 errors. This release adds context-pressure awareness to all hook injection points.
What changed:
- Context pressure gating: hooks self-throttle based on context fill level (75% high, 90% critical)
- Checkpoint caps: OpenClaw and OpenCode capped at 4000 chars with surrogate-pair safe truncation
- Fail-open design: pressure check failures default to normal operation
Platforms: Claude Code, OpenClaw, OpenCode, Codex
Reported by: Yuval Shchory