telemetry-core

Generated: 2026-08-24

OVERVIEW

Harness-neutral PostHog telemetry: env-gated opt-out, SHA256-hashed machine id, once-per-UTC-day capture dedup, and JSONL diagnostics. No product-specific strings live here — each consumer passes a TelemetryProductConfig (event name, cache dir, machine-id prefix, env prefix). Package: @oh-my-opencode/telemetry-core.

PUBLIC API (src/index.ts barrel)

Module	Key exports
record-daily-active.ts	recordDailyActive(input) — orchestrator: enabled? → client → dedup → trackActive → flush → shutdown
posthog-client.ts	createTelemetryClient, isTelemetryClientEnabled, createDefaultPostHogTransport
activity-state.ts	getDailyActiveCaptureState, resolveTelemetryStateDir, getTelemetryActivityStateFilePath
env.ts	shouldDisableTelemetry, getTelemetryApiKey/Host, hasTelemetryApiKey
machine-id.ts	getTelemetryDistinctId, getDefaultTelemetryOsProvider
events.ts	createEventTelemetryClient — typed event capture wrapper (see NOTES) + EventTelemetryClient, EventPropertyAllowlist, CreateEventTelemetryClientInput, …
diagnostics.ts	writeTelemetryDiagnostic, cleanupTelemetryDiagnostics
constants.ts	DEFAULT_POSTHOG_HOST, DEFAULT_POSTHOG_API_KEY
types.ts	TelemetryProductConfig, TelemetryClient, TelemetryTransport(Factory), TelemetryOsProvider, …

DEPENDENCIES & CONSUMERS

• Depends on: @oh-my-opencode/utils (writeFileAtomically, resolveXdgDataDir) + posthog-node (^5).
• Consumed by BOTH editions: omo-opencode/src/shared/posthog*.ts; omo-codex/src/telemetry/* and omo-codex/plugin/components/telemetry/*.

NOTES

• At most once per UTC day per machine. getDailyActiveCaptureState compares last-active UTC day in the state file; same day → captureDaily: false, nothing sent.
• $process_person_profile: false hardcoded on every capture — no PostHog person profiles.
• Distinct id = sha256(prefix + hostname) — never the raw hostname.
• Opt-out env matrix: ${PREFIX}_DISABLE_POSTHOG (truthy 1/true/yes) OR ${PREFIX}_SEND_ANONYMOUS_TELEMETRY (opt-out 0/false/no/yes); global OMO_ prefix also checked; plus the standard unprefixed DO_NOT_TRACK.
• NO_OP_CLIENT returned when disabled or transport init fails (enabled: false, all methods no-op). Transport + OS provider are injectable for tests.
• Diagnostics JSONL: 7-day retention, 256 KB cap, cleanup on every write.
• createEventTelemetryClient (events.ts) — event telemetry with a per-product propertyAllowlist: unknown properties are DROPPED with diagnostics, never sent. Hard-rejected keys: $ip, non-allowlisted $ keys (only $os, $os_version, $process_person_profile, $session_id pass), *_text|*_path|*_prompt suffixes (allowlisted non-string flags excepted), and non-finite numbers. Batching overrides (flushAt: 20, flushInterval: 10s) are applied LAST so a product config cannot weaken them. disableGeoip: false lets PostHog derive $geoip_country_code server-side from the transport IP — the client still never authors/stores an IP. No-op client when disabled, same as the daily-active path.
• Parent: packages/AGENTS.md.