Aireceipts

Minor: PR receipts gain a self-contained CI path (no external reusable workflow), the
default statusline gets richer, and the samosa tip link leaves the default PR-posted
surfaces (now opt-in). Two deliberate output changes — statusline default and the PR-posted
footer — both called out below.

Added

• Self-contained pr-check (SPEC-0064 R2–R7): an adopter's own workflow can run
  npx -y aireceipts-cli@latest pr-check in a single job — no reusable-workflow uses:,
  no org Actions-policy gate — to fetch the branch's receipt ref, render + sanitize it, and
  upsert the marked PR comment via GITHUB_TOKEN (no local gh). Hidden command; for trusted
  same-repo/internal PRs (the two-job reusable workflow stays the hardened path for untrusted
  fork PRs). Also fixes the reusable-caller template, which was missing pull-requests: write.

Changed (deliberate output changes)

• Richer default statusline (SPEC-0071): the default line now carries a burn rate ($/hr),
  context-window %, abbreviated M/B token counts, and an inline 5h reset countdown — e.g.
  [aireceipts] $423 · $80/hr · 501M · ctx 42% · 5h 26% ↺2h13m. Every segment renders from a
  real payload field or a priced ledger value; nothing is estimated.
• Samosa tip link off by default (SPEC-0070): the buy me a samosa link no longer appears
  on the surfaces aireceipts posts onto a PR (the comment's <details> and the artifact
  footer). Opt back in with --samosa; the standalone tip page and the docs-site footer are
  unchanged.

Internal / CI

• Incremental mutation testing (SPEC-0069): Stryker runs incrementally on PRs that touch
  the money paths (src/pricing/**, src/pr/**), with a nightly full sweep — the same
  anti-gaming moat at a fraction of the wall-clock. No product code change.