Conciseness

Dense, lean prose that assumes Claude's competence with no padding or explanation of basic concepts; every line carries an instruction (e.g. 'Treat every proposed change as a hypothesis about a real system, not as an implementation checklist').

Actionability

Instruction-only skill with no code (appropriate per scoring notes) but highly concrete directives: 'Reproduce the baseline first. Encode it as a failing behavioral test when executable', 'Label material risk claims as VERIFIED, INFERENCE, or UNKNOWN', and a defined verdict vocabulary with explicit triggering conditions.

Workflow Clarity

A clearly sequenced six-gate workflow (Ground the Problem → Name Semantic Consumers → Choose the Smallest Sufficient Change → Map Consequences → Implement Only the Justified Slice → Prove the Result) with explicit validation checkpoints (return STOP/NEEDS_EVIDENCE, require observed evidence before implementation, prove the result against observed evidence) and recursive re-application of the gates.

Progressive Disclosure

No bundle files exist and the skill is a single self-contained SKILL.md with clear section headers and no nested references, which is well-organized; it scores just below 5 because the single file is fairly long and a couple of reference tables (e.g. the consumer ledger) could conceivably live in supporting files.

Specificity

Lists multiple concrete actions across the whole lifecycle — 'assessing RFCs, issues, designs, features, refactors, migrations', 'identify the concrete problem and named semantic consumers', 'choose the smallest sufficient solution', 'reject pseudo-requirements' — with comprehensive coverage.

Completeness

Explicitly answers both 'what' ('Evaluate and carry out non-trivial software-system changes') and 'when' ('Use when assessing...') with concrete trigger phrases, and adds a negative 'Do not use for...' scope clause.

Trigger Term Quality

Strong natural vocabulary users would say ('RFCs, issues, designs, features, refactors, migrations, dependency changes') plus proposed artifacts (fields, events, APIs, modules, services); a few synonyms or casual phrasings are missing, so it sits just below the comprehensive anchor.

Distinctiveness Conflict Risk

Clear niche (non-trivial system changes whose need/consumers/rollback require scrutiny) and an explicit negative scope ('Do not use for mechanical edits, source-code explanation, or a dedicated review of an already-complete diff') sharply separates it from adjacent skills.