Conciseness

The body is command-first and free of explanations Claude already knows, with tight bullets and exact JSON field names. Minor duplication could be trimmed: the 'do NOT include context/rules in output' rule appears in Step 3 and again in Guardrails, and 'STOP after creating ONE artifact' repeats the one-artifact guardrail.

Actionability

Three copy-paste-ready CLI commands with exact flags ('openspec list --json', 'openspec status --change "<name>" --json', 'openspec instructions <artifact-id> --change "<name>" --json'), exact response fields to parse, and explicit per-status branching cover the common cases, matching the fully-executable anchor.

Workflow Clarity

A clear four-step sequence with explicit branches (complete / ready / all blocked) and a verification guardrail ('Verify the artifact file exists after writing before marking progress'). It lacks a validate-fix-retry feedback loop — the 'all blocked' branch only says to 'suggest checking for issues' — so it stops short of the level-5 anchor; the single-artifact, non-destructive nature means no cap applies.

Progressive Disclosure

No bundle files exist and none are referenced; the body is well-sectioned (Input, Steps, Output, Artifact Creation Guidelines, Guardrails) with no inlined reference material and no nested references. Schema-specific detail is delegated to the CLI at runtime, which is an appropriate progressive-disclosure mechanism.

Specificity

The description names the domain ('an OpenSpec change') and one concrete action ('creating the next artifact'), matching the anchor for 1-2 concrete actions without comprehensive coverage. It does not enumerate several specific actions (e.g., proposal, specs, design, tasks), which the level-4 anchor requires.

Completeness

Both 'what' ('Continue working on an OpenSpec change by creating the next artifact') and 'when' ('Use when the user wants to progress their change, create the next artifact, or continue their workflow') are explicitly present. The when-clause largely restates the what rather than adding distinct trigger contexts, so it does not clearly meet the level-5 anchor's fully concrete trigger phrases.

Trigger Term Quality

'progress their change', 'create the next artifact', and 'continue their workflow' are natural phrases a user would say, giving good keyword coverage. Common variations and synonyms ('next step', 'keep going', artifact names like proposal or tasks) are missing, so it falls short of the comprehensive level-5 anchor.

Distinctiveness Conflict Risk

'OpenSpec change' and 'artifact' establish a clear niche with mostly distinct triggers. The generic phrase 'or continue their workflow' and potential sibling openspec skills create minor overlap risk, matching the 'mostly distinct' level-4 anchor rather than the minimal-risk level-5 anchor.