Test Gap Analysis

Answer one question: which caller-visible production behaviors could change without an existing test failing? Mutation reasoning is a probe, not the goal. Inventory public outcomes first, then verify only credible gaps.

Composition dispatch

Before entering the decision flow, check the caller's mode. An explicit per-test-read-only request (including composition from grade-tests) uses only references/per-test-read-only.md. This mode is assessment context conveyed through the host's supported caller instructions, not a new skill-loader parameter or a mode-specific skill name. Read that reference and return its per-test assessment inline; do not enter the standalone workflow below. Loading this mode does not authorize a baseline run, mutation execution, file edits, suite discovery, or delegation. If the bundled reference is unavailable, allow at most one listing of the known references/ directory, then return N/A / unverified with the reason.