check-running-loops matches package-bin grinds; agent-loop --version; unknown
run flags are errors. Plugin 0.1.5 bundles the fixed heartbeat script.

Version references bumped to 0.8.1 (package.json, CONSUMERS.md, README,
embed-api, site, both llms.txt and the landing test).

Verified: pnpm install --frozen-lockfile, pnpm typecheck, pnpm test:coverage
(1144 vitest + 3 node suites), pnpm build, plugin build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>