v0.2.0

Added

• Foundation: error types, agent trait, database schema, config loading, logging utilities
• Agent support: Claude Code, Codex, OpenCode (session-level), Pi (experimental)
• Hook handlers: suivi hook pre and suivi hook stop with buffer correction
• CLI: suivi init, suivi status, suivi doctor --prune --check
• Analytics: suivi stats with today/week/all-time summary, --projects, --history, --graph, --daily
• Output formats: --format text|json|csv for suivi stats
• CONTRIBUTING.md at the repo root (the README already linked it) (#21)
• suivi uninstall (+ --purge): removes suivi's hook entries from every
  agent config, the inverse of suivi init (#23)

Changed

• The second headline metric is now agent time — the sum of each turn's
  real duration — replacing "accumulated" effective time, which blended human
  buffers into agent effort and double-counted attention across parallel
  sessions (#10). Summary JSON/CSV rename accumulated_secs to agent_secs;
  history exports gain an agent_duration_secs column. Per-turn
  effective_duration_secs is still stored and exported.

Fixed

• Agent thinking time was always recorded as 0: hook stop read a duration_ms
  field that no agent sends; durations now fall back to ended_at − started_at (#16)
• Turns interrupted before Stop fired were lost as stale rows; hook pre now
  closes any open turn in the session at the next prompt (#16)
• Agent attribution no longer depends on env/parent-process sniffing: hook
  commands pass --agent <id>, the payload agent field is honored, and
  sniffing remains only as a fallback for old installs (#17)
• suivi init only installs hooks for agents actually present on the machine,
  and re-runs upgrade outdated hook commands in place (#17, #18)
• cargo test no longer writes hook files into the developer's real home
  directory (#18)
• SQLite uses WAL and a 5s busy timeout so concurrent hooks from parallel
  sessions don't silently drop turns on lock contention (#19)
• "Today", daily buckets, and --history timestamps use the local timezone
  instead of UTC; --since dates are local midnight (#20)
• Invalid --since dates now error instead of being silently ignored (#20)
• suivi status reports "not installed" for absent agents instead of a
  misleading hook-health state (#18)
• Every command panicked with "Broken pipe" when piped to an early-exiting
  consumer; SIGPIPE now uses the default disposition (#23)
• OpenCode tracking recorded one truncated turn per session; the plugin now
  tracks per user message with verified event payloads (#24)
• Both JS plugins shelled out synchronously through temp files on every
  event; payloads now go to suivi's stdin via non-blocking spawn (#24, #25)
• The per-project and per-agent mini-graphs bucketed days in UTC, missing
  the local-timezone fix that covered the other views (#26)