Host: Codex CLI — This skill was designed for Claude Code and adapted for Codex. Cross-reference commands use installed skill names in Codex rather than /octo:* slash commands. Use the active Codex shell and subagent tools. Do not claim a provider, model, or host subagent is available until the current session exposes it. For host tool equivalents, see skills/blocks/codex-host-adapter.md.

Test Coverage Audit

Artifact consistency before implementation

When invoked at a spec/plan/tasks boundary, use the feature boundary adapter rather than this skill's code-test generation mode. It automatically runs bounded deterministic checks for coverage, declared paths, stable IDs, explicit terminology/enums/counts and verified policy references. A single artifact skips analysis; a clean pass costs no seat. Reports are advisory and quote the original sources. Escalation uses at most one independent seat, and unavailable or failed semantic review leaves the deterministic results usable.

Overview

Trace every codepath in a diff, map each path against existing tests, visualize coverage gaps, and auto-generate tests for uncovered paths.

Core principle: Trace codepaths in changed files -> Map against existing tests -> Score coverage quality -> Generate tests for gaps -> Report before/after counts.