Conciseness

The telegraphic style assumes competence and never explains known concepts, but it carries substantial time-sensitive data outside any deprecated section (fix dates '2026-10-24 and 2026-11-02', timings like '209 s of processor time... 26 s at a load average of 42', '703 s at a load average near 130') and a 13-cause findings catalog with per-cause counts that could be tightened or trimmed. This fits 'mostly efficient but could be tightened' rather than anchor 4, where the trimmable material would be minor.

Actionability

Guidance is fully executable: 'pnpm check:delete-paste-ranges', '--blocks=3 --lines=3', '--lower', "--case='<identity or part of one>'", '--jobs=<n>', exit codes 0/1/2, and copy-paste git commands ('git log --oneline -1 --grep "range check over a code block and bold"'). Concrete failure identities to reuse are given, matching the copy-paste-ready anchor.

Workflow Clarity

The batch-verification workflow is fully sequenced with explicit validation and feedback loops: gate exit codes and baseline case-count pins ('fails when either baseline's documents give a case count other than its pin'), a three-way failure classification (real bug / modeling error / intended change), '--case' for error recovery, and the loop where 'the gate fails until you run --lower'. The batch-operation cap does not apply because validation checkpoints are thorough.

Progressive Disclosure

No bundle files exist, so all content sits inline in one ~23KB SKILL.md with clear headers but no references. Reference-grade material — the 13-cause findings catalog with counts, deep-run statistics, mutant results, and the coverage-record table — is inlined rather than split out, matching the anchor 'content that should be separate is inline'. Not anchor 4 because the split-worthy material is substantial, not a minor gap.

Specificity

It enumerates concrete commands ('Backspace, Delete, Return, typing, paste, cut and bold') and the exact properties checked ('keep the text outside their range in order', 'the result stays canonical', 'one undo gives back the document') over 'every caret and range of every small document', with named document features (link, read-only inline, required title, one-text code block). Coverage is comprehensive with no gaps, matching the top anchor rather than anchor 4.

Completeness

The first sentence explicitly states what the skill does (the full property check) and the second gives an explicit 'Use before and after changing...' clause with three concrete triggers: editing the named source files, 'when the delete-paste-ranges step of pnpm check fails', and 'when fixing a delete, join or paste bug a tester found'. Both what and when are explicit with concrete trigger phrases, matching the top anchor exactly.

Trigger Term Quality

Natural terms a developer would actually say are all present: 'Backspace', 'Delete', 'paste', 'cut', 'bold', 'undo', 'delete, join or paste bug', alongside synonyms ('join', 'slice landing') and concrete file paths with extensions ('delete-text.ts', 'merge-nodes.ts'). This matches comprehensive coverage including synonyms and file references.

Distinctiveness Conflict Risk

The niche is precisely scoped to delete/paste range verification in the plitejs editor, with triggers naming exact files and a named check step, so it is clearly distinguishable from any other skill and unlikely to fire for the wrong one.