Conciseness

The ~390-line body spends heavily on things Claude already knows — a blame-vs-blameless culture table, 'What Went Well / What Went Wrong / Where We Got Lucky' scaffolding, and obvious do's and don'ts like "Don't name and shame" — and it duplicates the 5 Whys analysis both inside Template 1 and again as Template 2. This matches the level-2 anchor of noticeably verbose with several padded sections, rather than level 3, because the padding is substantial and structural, not occasional.

Actionability

For an instruction-only skill the guidance is fully concrete: three copy-paste-ready templates (standard, 5 Whys with evidence fields, quick postmortem), a minute-by-minute 60-minute meeting agenda, a prioritized action-item table format with owners/due dates/tickets, and an anti-patterns table with better approaches. This matches the level-5 anchor's fully executable, common-cases-covered guidance; level 4's 'minor gaps' do not apply.

Workflow Clarity

The postmortem timeline (Day 0 through Quarterly review) and the sequenced meeting structure with time-boxes give a clear sequence, and the Draft | In Review | Final status plus 'Identify gaps in timeline' act as implicit checkpoints. It falls short of the level-5 anchor because validation steps (e.g., verify the timeline with responders before finalizing, confirm action-item tickets exist) are implied rather than explicit feedback loops.

Progressive Disclosure

The body has clear section headers and is navigable, but the three full templates (Template 1 alone runs ~160 lines) and the facilitation guide are inlined content that clearly belongs in separate reference files — matching the level-3 anchor of 'content that should be separate is inline'. It is above level 2 because the structure is real and nothing is buried, but below level 4 because there is no file split at all despite the bulk.

Specificity

The description names several concrete capabilities — "root cause analysis, timelines, and action items" — paralleling the level-4 anchor's several specific actions. It stops short of the level-5 anchor's comprehensive coverage because "improving incident response processes" broadens scope without naming the concrete actions involved.

Completeness

It explicitly answers both questions: what ("Write effective blameless postmortems with root cause analysis, timelines, and action items") and when ("Use when conducting incident reviews, writing postmortem documents, or improving incident response processes"), with concrete trigger phrases. This matches the level-5 anchor example's structure; the level-4 anchor requires a 'when' that is only partly explicit, which does not apply here.

Trigger Term Quality

"incident reviews", "postmortem documents", and "incident response" are natural phrases users would say, matching the level-4 anchor's good keyword coverage. Common synonyms like "retrospective", "post-mortem", or "incident report" are missing, so it does not reach the level-5 comprehensive-synonym anchor.

Distinctiveness Conflict Risk

"Blameless postmortems" and "incident reviews" carve out a clear niche with distinct triggers and minimal overlap with adjacent skills (e.g., generic writing or code-review skills), matching the level-5 anchor. The level-4 anchor's "minor overlap risk with closely related skills" is not triggered, since postmortem/incident terminology is unambiguous.