Conciseness

The body is lean, imperative, and assumes Claude's competence throughout, with no explanations of known concepts. However, the '## Rules' section restates branching already specified in the Workflow (e.g., 'On failed, print the handoff Markdown as returned and stop' duplicates the failed branch), and justificational asides like 'That property is load-bearing...' could be trimmed. This matches 'efficient; minor instances of over-explanation that could be trimmed' rather than the fully lean level 5.

Actionability

Guidance is concrete and executable: exact reference files per step, exhaustive branching on the three Status values with explicit stops, {plan-path}/{candidate-path} defined so every emitted command is directly runnable, and a named Completion layout in references/output.md. It stops short of level 5 only because the body itself contains no examples of the reports or layouts it mandates — all sample content lives in the references, leaving minor gaps if a reference were unavailable.

Workflow Clarity

A strict two-step sequence with read-before-run gates, explicit validation checkpoints (branch on blocked/failed/validated), feedback loops for error recovery (failed handoff ending in '/validate {plan-path}' retry), and explicit stop conditions for every outcome. This matches the anchor for a clear sequence with explicit validation steps and feedback loops.

Progressive Disclosure

The ~100-line body holds only control flow, with a table mapping each step to its reference file; all three referenced files (references/validation.md, references/validation-report.md, references/output.md) exist, are one level deep, and are clearly signaled with when to read them (including the point-in-time note for validation-report.md on validated/failed only). This matches the anchor for a clear overview with well-signaled one-level-deep references and easy navigation.

Specificity

The description names the domain ('SCE plan') and two concrete actions ('Validate one completed SCE plan', 'record final validation evidence'), but does not enumerate what validation covers (running full validation commands, checking acceptance criteria, writing the Validation Report). This matches the anchor for naming a domain with 1-2 concrete actions without comprehensive coverage, and falls short of the level 4 anchor requiring several specific actions.

Completeness

The 'what' is clear (validate a completed SCE plan, record final validation evidence), but there is no 'Use when...' clause or any equivalent explicit trigger guidance, which per the judging guidelines caps completeness at 3. It cannot score 4 without at least an implicit 'when'.

Trigger Term Quality

Relevant keywords are present ('validate', 'validation', 'SCE plan', 'evidence'), but common natural variations a user would say ('run validation on', 'check the plan', 'is the plan done', 'final check') are missing. It has more than the one or two generic keywords of level 2, so level 3 fits best.

Distinctiveness Conflict Risk

'One completed SCE plan' and 'final validation evidence' carve a specific niche with distinct terminology, giving minor overlap risk only with closely related SCE workflow commands (e.g., a next-task or plan-execution skill). It lacks the explicit distinguishing trigger phrases of the level 5 anchor.