[Bug] Skill(claude-api) returns excessive context in single tool result

Question

**Bug Description**
claude-api skill consumed full context in one tool result

Claude auto-invoked `Skill(claude-api)` which returned **537KB** of raw documentation text as a single tool result — the entire Claude API reference dumped inline.

**Environment Info**
- Platform: darwin
- Terminal: tmux
- Version: 2.1.167
- Feedback ID: 3bf1fea5-6759-4f2e-9c4a-2a471ef24a1e

**Errors**
```json
[]
```