cross-check
Installation
SKILL.md
Cross-model check
Check a non-code artifact with the other model family, then verify its claims. Assume most findings are needlessly defensive slop. Keep what changes correctness, meaning, or the conclusion.
Families share training data and blind spots, so agreement is not evidence of truth. Cross-checking exposes reasoning gaps, contradictions, and arithmetic errors; facts need sources.
Options
| Option | Default | Override |
|---|---|---|
| Mode | report: originals unchanged |
fix when the user authorizes edits |
| Reviewer | Claude author → Codex gpt-6-astra; Codex/GPT author → Claude opus |
Explicit model from the other family |
| Effort | Reviewer's configured default | effort=LEVEL; see CLI reference |
| Rounds | max-rounds=1 |
Positive integer in fix mode, e.g. 3 |
Ask for a finite maximum if the user requests a loop without one. Establish the author family if unknown; never silently switch families or requested models. A loop does not itself authorize edits.