Conciseness

The body is focused procedural guidance with no padding or explanation of concepts Claude already knows; minor tightening is possible since the opening line "Sync delta specs from a change to main specs." duplicates the frontmatter description and the step 3c rules partially restate the format reference.

Actionability

Concrete guidance throughout: the exact command `openspec list --json`, precise paths like `openspec/changes/<name>/specs/*/spec.md`, per-section handling rules, a worked delta-format example, and a copy-ready output template; minor gaps remain (no command to verify results, and merging depends on judgment calls like "Use your judgment to merge changes sensibly").

Workflow Clarity

Steps 1-4 are clearly sequenced with pre-checks ("If no delta specs found, inform user and stop") and guardrails ("Read both delta and main specs before making changes"), but this batch edit of spec files — including destructive REMOVED Requirements — has no post-edit validation or verification step, capping the score at 3 per the batch/destructive guideline.

Progressive Disclosure

As a single-file skill with no bundle, its well-organized sections (Steps, Delta Spec Format Reference, Output On Success, Guardrails) keep content appropriately placed; at ~128 lines it exceeds the under-50-line exception, and the format reference block could arguably live in a separate file, so it stops short of anchor 5.

Specificity

"Sync delta specs from a change to main specs" names the domain and a single concrete action with a clear boundary ("without archiving the change"), but does not enumerate the several operations (adding, modifying, removing, renaming requirements) the skill actually performs, so it matches anchor 3 rather than anchor 4.

Completeness

Both parts are explicit: the what is "Sync delta specs from a change to main specs" and the when is "Use when the user wants to update main specs with changes from a delta spec, without archiving the change"; the when clause is a single trigger that could cover more concrete user phrasings, so it is not anchor 5.

Trigger Term Quality

Terms like "sync", "update main specs", "delta spec", "change", and "archiving" give good keyword coverage for this niche, matching anchor 4; a few natural phrasings (e.g., "apply changes", "openspec") are missing, keeping it below anchor 5.

Distinctiveness Conflict Risk

The openspec-specific vocabulary ("delta spec", "main specs", "archiving the change") carves out a clear niche and explicitly distinguishes this from archiving a change, giving minimal conflict risk with other skills.