Conciseness

The body is dense with genuinely non-obvious operational judgment (null-vs-gitUnavailable disambiguation, which columns sum, no-dollar-figures rule), but at least three substantial passages are explained twice in full: the spend-attribution rationale appears in the JSON comments and again under 'Don't add a where the spend went', the null commitsWithOurWork interpretation appears in 'What the numbers mean' and again in Step 3, and the column-summing rules are stated in both places too. This fits the 3 anchor ('mostly efficient but includes some unnecessary explanation or could be tightened') better than 4, where over-explanation would be only minor.

Actionability

The guidance is fully executable: a copy-paste miner invocation with a fixed temp path ('node <skill-dir>/scripts/mine-transcripts.mjs --days <N> [--repo <substr>] --html /tmp/cc-receipt.html'), an exact output-filename pattern with dates sourced from the JSON, a complete annotated output schema, and explicit table columns with rounding rules ('round to whole percent; show "<1%" rather than "0%"'). The referenced script (scripts/mine-transcripts.mjs) actually exists in the bundle. This matches the 5 anchor: copy-paste ready commands covering the common cases.

Workflow Clarity

Six steps are clearly sequenced (parse period → run miner → write report → save markdown → save HTML → wrap up) with real interpretation checkpoints: check gitUnavailable before calling a null a zero, 'The HTML makes the same distinction and the two must agree', and the wrap-up verification of what left the machine. It sits at 4 rather than 5 because there is no error-recovery path (e.g., what to do if the miner script fails or node is unavailable), and 3 would require checkpoints to be missing or only implicit, which is not the case.

Progressive Disclosure

Structure is good: well-organized step sections, and the one bundle file (scripts/mine-transcripts.mjs) is correctly referenced in the body and exists on disk, one level deep with no nesting. It falls short of 5 because roughly 90 lines of annotated JSON schema documentation live inline in SKILL.md — reference material that could be split into a references/ file so the top-level file stays a leaner overview; the 4 anchor ('most content is appropriately placed; minor organization gaps') describes this precisely.

Specificity

The description lists multiple concrete actions with comprehensive coverage: 'Mines ~/.claude/projects locally', 'cross-references local git history', and 'writes a markdown report plus a self-contained HTML receipt to your home directory'. All are stated in third person, and nothing is padded or generic — this matches the 5 anchor ('lists multiple specific concrete actions; comprehensive coverage') and is clearly above the 4 anchor, which expects minor coverage gaps.

Completeness

It explicitly answers both questions: 'what' (generate a usage & impact report by mining local transcripts, cross-referencing git, writing markdown + HTML) and 'when' (an explicit 'Use when the user asks for...') clause with concrete trigger phrases. This mirrors the 5 anchor example almost exactly; the 4 anchor requires a 'when' that 'could be more explicit', which does not apply here.

Trigger Term Quality

It includes the natural phrases a user would actually say: "receipts", "impact report", "usage report", "show my Claude Code activity", "prove the value of Claude Code", plus the slash command "/receipts". This is comprehensive synonym coverage matching the 5 anchor; there are no missing common variations of the request.

Distinctiveness Conflict Risk

It occupies a clear niche — a personal Claude Code activity report built from local session transcripts — with distinct triggers ('receipts', '/receipts') that no other plausible skill would claim. Conflict risk with general usage-analytics or git-reporting skills is minimal because the scope is explicitly scoped to '~/.claude/projects' session transcripts on this machine.