Conciseness

At ~35 lines the body is lean with zero concept explanations Claude already knows; the Response Format rules and exact error strings are operational precision rather than padding. Every token earns its place, matching anchor 5.

Actionability

Fully executable guidance: exact commands ('entire version', 'entire explain --no-pager --commit COMMIT_SHA'), copy-paste-ready user-facing error messages, and concrete agent delegation (Haiku for git blame, Sonnet for the transcript). Nothing is pseudocode or vague, matching anchor 5.

Workflow Clarity

A clear 3-step sequence where every step has an explicit validation checkpoint and error-recovery branch (CLI missing, file not tracked, code uncommitted, no transcript found), with instructions to stop and report. This matches anchor 5's explicit validation and error-recovery pattern; the skill is read-only, so the destructive/batch cap does not apply.

Progressive Disclosure

The skill is under 50 lines, single-purpose, and needs no external references — per the rubric's simple-skill note, well-organized sections suffice. The body is cleanly split into intro, Response Format, and Process with no content that belongs in separate files.

Specificity

The description names its domain ('intent behind source code') and 1-2 concrete actions ('Explains the intent... by finding original session transcripts'), but stops there. It does not reach anchor 4's 'several specific actions' — the mechanism is single-purpose and what the skill actually returns (the transcript, a summary) is left unstated.

Completeness

Both questions are explicitly answered: what ('Explains the intent behind source code by finding original session transcripts') and when ('Use explain with a function, file, or line of code to understand why it exists') with concrete trigger phrases. The 'when' clause is explicit with specific triggers, matching anchor 5 rather than anchor 4's 'could be more explicit'.

Trigger Term Quality

Natural phrases users would say are present: 'function', 'file', 'line of code', 'understand why it exists', 'intent', 'source code'. A few natural synonyms ('why was this written', 'commit history', 'git blame') are missing, fitting anchor 4 rather than 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

Session-transcript tracing is a distinct niche with its own tooling (the Entire CLI), but 'explain code / why does this exist' phrasing overlaps with generic code-explanation requests, creating minor overlap risk with closely related skills. Not anchor 5 because a plain 'explain this function' request could plausibly fire it.