Conciseness

The body is lean and directive with zero concept-teaching — every line is an instruction or a boundary. Minor trimmable redundancy keeps it off 5: "Read the reference before taking any action for step 1, not after" duplicates the Rules bullet "Read each phase's reference before running that phase", and sentences like "That property is load-bearing, so reach it through the reference rather than acting from this summary" are meta-commentary. Not 3 because there is no unnecessary explanation of things Claude already knows and the writing is tight throughout.

Actionability

As an instruction-only skill, its guidance is fully executable: exact reference paths ("Read `references/validation.md`, then run the Validation phase"), an explicit branch on the report's `Status:` with defined outcomes for `blocked`, `failed`, and `validated`, exact stop points, preserved retry command ("Preserve the retry `/validate {plan-path}` instruction"), and explicit empty-`$ARGUMENTS` handling ("report that a plan name or path is required, state the expected argument, and stop"). The common cases are all covered; per the scoring notes, absence of code in an instruction-only skill is not penalized when guidance is this concrete.

Workflow Clarity

The sequence is explicit and checkpointed: Input handling (required argument, resolve exactly one plan) → step 1 validate with branch-on-status → step 2 render the Completion layout → stop. Validation is the workflow's core and is surfaced as an explicit gate, and there is a feedback loop on `failed` (the handoff ends with `/validate {plan-path}` for repair-then-retry). The skill is explicitly non-destructive ("never repairs it", "Do not create a Git commit"), so the destructive-operation cap does not apply.

Progressive Disclosure

Scored against the actual bundle: SKILL.md is a concise control-flow overview, and all three referenced files exist and are one level deep — `references/validation.md` (the phase), `references/validation-report.md` (the plan-file report format, directly surfaced from SKILL.md), and `references/output.md` (the terminal layout). References are well-signaled via the step→reference table and point-of-need callouts, and no phase detail is inlined ("Do not duplicate the internal instructions of embedded phases"). This matches 'Clear overview with well-signaled one-level-deep references; content appropriately split; easy navigation'.

Specificity

"Validate one completed SCE plan and record final validation evidence" names the domain (SCE plans) and exactly two concrete actions (validate, record evidence), matching the anchor 'Names domain and 1-2 concrete actions, but not comprehensive'. Not 4 because it does not list several specific actions covering the skill's actual scope (running acceptance checks, writing the Validation Report, returning validated/failed/blocked outcomes); not 2 because the actions are more concrete than 'Processes PDF files'.

Completeness

The 'what' is clear (validate a completed SCE plan and record final validation evidence) but there is no 'Use when...' clause or any implied trigger for when Claude should invoke it, so completeness is capped at 3 per the judging guideline ('Has a clear what but when is missing or only weakly implied'). Not 2 because the 'what' is concrete, not vague; not 4 because 'when' is entirely absent rather than under-specified.

Trigger Term Quality

Natural terms present: "validate", "validation", "plan", "evidence" — a user would plausibly say "validate the plan". But "SCE" is internal jargon users would not say, and common synonyms like "verify", "check", or "confirm" are absent, matching 'Some relevant keywords but missing common variations or synonyms'. Not 4 because keyword coverage is thin; not 2 because the terms go beyond generic phrases like 'Works with files'.

Distinctiveness Conflict Risk

"one completed SCE plan" carves a distinct niche with low overlap risk against unrelated skills, and 'completed' plus 'final validation evidence' distinguish it from implementation skills in the same family — 'Mostly distinct; minor overlap risk with closely related skills'. Not 5 because without any trigger phrasing, a generic request to 'validate' something could still pull in this or sibling SCE skills.