Conciseness

The body is dense and directive with no concept explanations Claude already knows (e.g., "Prove the failure before fixing it", "A failing label is not a reproduction"). It falls short of anchor 5 due to redundancy across sections: side-effect classes appear in both Preconditions and Safety Boundaries, and Outputs overlaps Output Format ("Use concise sections: Reproduction, Root Cause, Patch, Validation..." restates the Outputs field list).

Actionability

For an instruction-only skill the guidance is largely concrete: named validation gates ("run strict audit, OpenClaw, OpenAI format lint, progressive disclosure lint, Plugin Eval"), exact output fields ("schema_version: 1", "pass|fail|blocked"), and a numbered procedure with specific directives like "Add or name regression protection that would fail before the fix and pass after it". It is not anchor 5 because several steps defer to contracts whose execution details are not in the bundle ("Apply the git staging contract", "Apply the visual reference contract"), leaving minor gaps in copy-paste executability.

Workflow Clarity

The Procedure is a clear 1-8 sequence with explicit validation checkpoints and a fail-fast feedback loop ("stop at the first failed gate, classify it, fix or block it, then rerun before broader validation"), which satisfies the validation requirement for mutation-class operations. It misses anchor 5 due to a sequencing defect — two steps are both numbered 6 (the git staging step and the media-storage step) — and some steps are conditional abstractions ("Apply the visual reference contract when...") rather than fully specified actions.

Progressive Disclosure

SKILL.md is a lean overview with a dedicated, purpose-labeled References section ("Contract and eval routing: references/contract.yaml, references/evals.yaml" — both files exist in the bundle), and the Stage Arc Boundary section clearly signals when to load its contract. Scored against the actual bundle structure it is not anchor 5 because four of the six reference entries (../../references/stage-arc-boundary-contract.md, ../../references/subagent-call-contract.md, ../../references/visual-reference-contract.md, and Plugins/harness-engineering/references/deferred-context-index.md) do not resolve within this package, and references/task-profile.json exists but is never linked.

Specificity

"Debug and repair validated Harness Engineering defects with bounded scope, reproduction evidence, root-cause notes, regression protection, and validation proof" lists multiple concrete actions covering the full fix workflow (debug, repair, reproduce, root-cause, regression protection, validation) with comprehensive coverage. It exceeds anchor 4 because the action list spans the entire defect-repair lifecycle, not just several actions with gaps.

Completeness

Clearly answers both questions: what ("Debug and repair validated Harness Engineering defects with bounded scope, reproduction evidence, root-cause notes, regression protection, and validation proof") and when ("Use when a bug is already evidenced and the fix should not expand into broad improvement work") with a concrete trigger phrase. This matches anchor 5 exactly; anchor 4 would require the 'when' clause to be less explicit.

Trigger Term Quality

Natural terms present: "bug", "debug", "fix", "repair", "defects", "regression", plus an explicit "Use when a bug is already evidenced" trigger clause. It falls short of anchor 5 because common user phrasings like "failing test", "stack trace", "error", "broken", or "CI failure" are absent (they appear only in the body, not the description).

Distinctiveness Conflict Risk

The "Harness Engineering" domain qualifier plus "when a bug is already evidenced and the fix should not expand into broad improvement work" carves a clear niche and actively steers away from broad improvement work. It sits at anchor 4 rather than 5 because 'debug and repair bugs' overlaps generic debugging/diagnosis skills in the same family, and the HE qualifier alone is what disambiguates them.