Conciseness

The body is mostly concrete instruction, but there is real duplication beyond minor: step 9's summary template, "Output On Success", and "Output On Partial Success" repeat nearly identical output formats, and the Guardrails section restates inline rules ("Always prompt for selection, never auto-select" repeats step 2's "Do NOT auto-select"). This fits 'mostly efficient but could be tightened'; it is not 2 because nothing explains concepts Claude already knows.

Actionability

Guidance is largely executable: exact commands (`openspec list --json`, `openspec status --change "<name>" --json`), exact paths and parsing patterns (`openspec/changes/<name>/tasks.md`, `### Requirement: <name>`), and concrete mv commands with a date format. It stops short of 5 because step 8a defers to "the openspec-sync-specs approach (agent-driven intelligent merge)" with no inline detail, and step 5b's "Search the codebase for implementation evidence" is open-ended.

Workflow Clarity

Nine well-sequenced steps with explicit checkpoints for a batch/destructive operation: pre-flight batch validation (step 3), conflict detection before any mutation (steps 4-5), user confirmation before destructive moves (steps 2 and 7), per-change outcome tracking (step 8c), and failure containment ("If archive target exists, fail that change but continue with others"). Validation is present, so the batch-operation cap of 3 does not apply; it is not 5 because there is no post-move verification and the sync step leans on an external approach.

Progressive Disclosure

The skill is a single ~250-line file with no bundle (no references/, scripts/, or assets/ exist) and no external references at all. Section headers make it navigable, but content that would fit a reference file — the two full conflict-resolution examples (Example 1/Example 2) and the repeated output templates — is inlined, matching 'some structure but content that should be separate is inline'. It is not 2 because the file is well-sectioned and self-contained rather than a monolithic wall.

Specificity

"Archive multiple completed changes at once" names the domain (completed changes) and one concrete action (batch archive), matching the '1-2 concrete actions, not comprehensive' anchor. It omits key capabilities the skill actually has (spec-conflict detection, spec syncing), which keeps it below 4.

Completeness

Both parts are explicitly present: what ("Archive multiple completed changes at once") and when ("Use when archiving several parallel changes"), so it clears the missing-'when' cap of 3. It falls short of 5 because the trigger clause is a single narrow phrase echoing the 'what' rather than a list of concrete trigger situations.

Trigger Term Quality

Terms like "archive", "completed changes", and "archiving several parallel changes" are natural, but coverage stops at the archive-family; common variations such as "batch", "bulk", or "clean up finished changes" are missing. Fits 'some relevant keywords but missing common variations' rather than the good-coverage anchor.

Distinctiveness Conflict Risk

The framing around "completed changes" and "parallel changes" is workflow-specific and unlikely to fire for unrelated skills, fitting 'mostly distinct; minor overlap risk'. It is not a 5 because the word "archive" without naming openspec/spec changes leaves minor overlap risk with generic file-archiving requests.