Conciseness

The body is efficient, procedural, and assumes Claude's competence (no explanations of basic concepts, exact JSON fields to parse, exact commands). Minor redundancy could be trimmed — the planning-boundary rule is restated nearly verbatim in "Planning boundary" and "Guardrails", and the store-flag instruction appears in both the "Store selection" preamble and Steps 2–3.

Actionability

Commands are copy-paste ready with placeholders ("openspec new change \"<name>\"", "openspec instructions <artifact-id> --change \"<name>\" --json") and the skill specifies exactly which JSON fields to read (applyRequires, requires edges, resolvedOutputPath). This fully matches the anchor for executable guidance covering the common cases.

Workflow Clarity

The six steps are clearly sequenced with explicit feedback loops (re-run `openspec status --change` after each artifact), explicit stop conditions ("Stop when every artifact in the required set is done, skipped, or was deliberately skipped"), and per-artifact verification ("Verify each artifact file exists after writing before proceeding to next"). This matches the anchor with validation steps and error-recovery checkpoints for a batch operation.

Progressive Disclosure

The body is well organized with headers, steps, and guidelines, and there are no nested or dead references. However, at ~137 lines with no bundle files, detailed edge-case material (store-selection mechanics, required-set closure rules, schema-resolution branches) is inlined in the main file rather than split into a one-level-deep reference, leaving minor organization gaps relative to the score-5 anchor.

Specificity

"Propose a new change with all artifacts generated in one step" and "proposal with design, specs, and tasks" name several concrete actions with specific artifact types, matching the score-4 anchor of several specific actions with minor gaps. It falls short of 5 because coverage is not comprehensive — the artifact set is only partially enumerated.

Completeness

Both parts are explicit: the what ("Propose a new change with all artifacts generated in one step... proposal with design, specs, and tasks") and the when ("Use when the user wants to quickly describe what they want to build and get a complete proposal..."). This clearly matches the score-5 anchor with concrete trigger phrasing.

Trigger Term Quality

Natural phrases users would say are present ("describe what they want to build", "proposal", "design, specs, and tasks"), giving good keyword coverage. A few natural terms are missing (e.g., "openspec", "spec change", "plan a change"), so it does not reach the comprehensive synonym coverage of 5.

Distinctiveness Conflict Risk

The artifact vocabulary (proposal, design, specs, tasks) gives it a mostly distinct niche with minor overlap risk against generic planning/proposal skills via the broad trigger "describe what they want to build". It fits score 4 better than 3 (which would imply real overlap with similar skills) or 5 (which would require fully distinct triggers).