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feat(analytics): add consent-gated activation-funnel analytics via PostHog

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Installs are up 615% but 7-day retention is ~0% and we had no analytics SDK
to see where users drop off. Adds a thin PostHog wrapper (src/lib/analytics.ts)
that tracks app_opened, connection_form_submitted, connection_attempted,
connection_succeeded/failed (with a coarse error_class, e.g. the known 401
auth bug), message_sent, and response_received.

PostHog was chosen over Aptabase for its GMS-free JS-only RN SDK (fine for
the F-Droid/no-Firebase build), EU-hosted/self-host option, and generous
free tier. Analytics shares the exact same consent flag as Sentry
(telemetry.ts now gates both) so zero network calls happen without explicit
opt-in.

Requires a new EXPO_PUBLIC_POSTHOG_KEY CI secret (wired into build.yml,
publish-fdroid.yml, publish-play-store.yml, and documented in
publish-app-store.yml alongside the existing Sentry secrets).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NJKAQ6HAikWGQK7PGZ5Y4E
This commit is contained in:
engineer
2026-07-16 15:48:16 -07:00
parent a5723bf087
commit ace8c19816
14 changed files with 309 additions and 24 deletions
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1
.github/workflows/build.yml vendored
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@@ -33,6 +33,7 @@ jobs:
runs-on: ubuntu-latest
env:
EXPO_PUBLIC_SENTRY_DSN: ${{ secrets.EXPO_PUBLIC_SENTRY_DSN }}
EXPO_PUBLIC_POSTHOG_KEY: ${{ secrets.EXPO_PUBLIC_POSTHOG_KEY }}
SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
SENTRY_ORG: ${{ secrets.SENTRY_ORG }}
SENTRY_PROJECT: ${{ secrets.SENTRY_PROJECT }}

7
.github/workflows/publish-app-store.yml vendored
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@@ -23,9 +23,10 @@
# provisioning profile so CI never needs to prompt):
# eas login && eas build --platform ios --profile production
#
# Optional crash reporting belongs in the EAS `production` environment because the
# iOS bundle is built on a remote EAS worker. Configure EXPO_PUBLIC_SENTRY_DSN,
# SENTRY_AUTH_TOKEN, SENTRY_ORG, and SENTRY_PROJECT in Expo before releasing.
# Optional crash reporting + analytics belong in the EAS `production` environment
# because the iOS bundle is built on a remote EAS worker. Configure
# EXPO_PUBLIC_SENTRY_DSN, SENTRY_AUTH_TOKEN, SENTRY_ORG, SENTRY_PROJECT, and
# EXPO_PUBLIC_POSTHOG_KEY (PostHog project API key) in Expo before releasing.
#
# Build number is managed remotely by EAS (eas.json: cli.appVersionSource=remote,
# build.production.ios.autoIncrement=buildNumber). The workflow only injects the

1
.github/workflows/publish-fdroid.yml vendored
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@@ -12,6 +12,7 @@ jobs:
contents: write
env:
EXPO_PUBLIC_SENTRY_DSN: ${{ secrets.EXPO_PUBLIC_SENTRY_DSN }}
EXPO_PUBLIC_POSTHOG_KEY: ${{ secrets.EXPO_PUBLIC_POSTHOG_KEY }}
SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
SENTRY_ORG: ${{ secrets.SENTRY_ORG }}
SENTRY_PROJECT: ${{ secrets.SENTRY_PROJECT }}

1
.github/workflows/publish-play-store.yml vendored
View File

@@ -31,6 +31,7 @@ jobs:
runs-on: ubuntu-latest
env:
EXPO_PUBLIC_SENTRY_DSN: ${{ secrets.EXPO_PUBLIC_SENTRY_DSN }}
EXPO_PUBLIC_POSTHOG_KEY: ${{ secrets.EXPO_PUBLIC_POSTHOG_KEY }}
SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
SENTRY_ORG: ${{ secrets.SENTRY_ORG }}
SENTRY_PROJECT: ${{ secrets.SENTRY_PROJECT }}