v0.13.0 — Project memory: --brief distills your whole session history, hooks inject it at session start

• Project memory — --brief: distill EVERY session of a project
  into one living document at ~/.claude/briefs/<project>.md — a
  factual session timeline + most-touched files, and with --llm a
  distilled memory (Decisions / Fixed / Conventions / Open threads),
  every bullet citing the session it came from. Per-session notes are
  cached, so refreshing after new sessions costs only the new ones.
• --install-brief-hook: two hooks — SessionStart injects the
  brief as context (Claude starts already knowing the project);
  SessionEnd auto-refreshes the factual skeleton for free. Hooks
  never trigger LLM calls or create files; a freshness stamp makes
  staleness visible in the file and as an injection warning, and the
  timeline is capped at 20 bullets so injection stays bounded.
• Internals: _resolve_provider extracted (shared key/model
  resolution), hook settings editing generalized, single-file build
  now handles multi-line module docstrings.