/receipts — personal Claude Code impact report

Generates a markdown report of one developer's own Claude Code activity, built entirely from local data:

• Source data: this machine's session transcripts at ~/.claude/projects/**/*.jsonl (every session, every project, already on disk — nothing to set up).
• Cost: the mining step is a local Node script — file I/O + regex, zero API calls. The only model call is one final write-up over a small (~10-20KB) JSON summary, regardless of how much history was scanned.
• Cross-reference: local git log per repo (no network) to sanity-check commit activity against CC session activity.

Step 1 — figure out the period

Parse $ARGUMENTS:

• "week" → 7, "month" → 30 (default if nothing given), "quarter" → 90, "year" → 365
• a bare number → that many days
• a project name/substring (e.g. "for anthropic") → pass through as --repo <substr>. It matches against the resolved project name, case-insensitively, and scopes the entire report — totals included — to matching projects.

Step 2 — run the miner

The script mine-transcripts.mjs ships alongside this SKILL.md, under scripts/. Use its absolute path:

n…