v0.4.0 — Reliability & cross-session insight

First release recorded against real Claude Code sessions (not synthetic data).

Added

• claude-replay doctor — a self-check that answers is Replay actually recording? Verifies hooks are installed, the claude-replay command resolves on PATH (the #1 silent-failure mode — a hook Claude Code can't find records nothing), the DB exists, and sessions are being recorded. Plus an install-time PATH warning.
• Cross-session analytics — claude-replay stats, a replay_stats MCP tool (ten tools now), and /api/stats: total/avg tool calls, overall error rate, the death-cause breakdown ("why your sessions end"), tool mix, per-project rollups, and a day-by-day trend.

374 tests, ruff clean. Pre-release audit clean (secrets, deps, wheel/sdist contents, twine).

Install: pip install claude-replay · then claude-replay doctor