Adds a new Codex plugin component `telemetry` that emits a single
omo_codex_daily_active event (reason: session_start) from every Codex
SessionStart hook, with the same UTC-day deduplication, hashed
installation identifier, and four-flag opt-out as the install-time
event. Previously omo-codex telemetry only fired on install_completed,
so DAU/WAU/MAU under-reported real Codex usage.
- New plugin component packages/omo-codex/plugin/components/telemetry/
mirrors the rules/comment-checker/lsp pattern: own src/, tsc build,
vitest tests, package.json (posthog-node dep), hooks/hooks.json.
- src/codex-hook.ts wraps createPluginPostHog().trackActive(..., "session_start")
with safeShutdown so Codex session startup never blocks on telemetry.
- Plugin root hooks.json + workspaces register the new component
alongside rules and ultrawork on SessionStart.
- Aggregate test expectations updated to include the telemetry directory.
- cross-package-equivalence.test.ts pins product-identity constants and
shouldDisablePostHog behavior to stay byte-equivalent between the CLI
installer (src/telemetry/) and the plugin runtime
(plugin/components/telemetry/src/), so the two PostHog sources never
drift on event name, distinct_id base, dedup file path, or opt-out
flags.
- PostHogActivityReason union in the CLI-side posthog.ts gains
"session_start" so future CLI paths can emit the same reason without
a type break.
YeonGyu-Kim