Adds Common Mistake #10: reviewing from a summary instead of the raw file. Format / structure / spec-compliance problems (frontmatter, schema, config, exact YAML) live in the precise text — a summary-fed reviewer is blind to them. Give the reviewer the actual file for those checks.
This captures the v0.1.8 lesson: the skill's own frontmatter stayed off-spec through many summary-fed Codex reviews until one file-reading review caught it. (v0.1.9 tag was previously used by a withdrawn timeout experiment, since reverted; reused here.)