feat(analytics): consent_choice on decline via PostHog cookieless mode - #4588
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#4587) - new opt-in cookielessMode config flag (same pattern as the other posthog flags, Docker build-arg included, default off) - reject() emits one anonymous consent_choice {accepted:false} through the SDK's on_reject cookieless path — capture runs before reset() because reset would overwrite the cookieless sentinel identity - no cookie or persistent identifier is written on the decline path (persistence is forced off by the SDK in this mode, asserted in tests) Requires the PostHog project-level cookieless toggle server-side; without the flag the decline path is byte-identical to before. Claude-Session: https://claude.ai/code/session_015AXhHayqcLntuU3AbX7No8
…cope Security-pass MEDIUM: the flag comment advertised only the decline consent_choice event, but with opt_out_capturing_by_default the SDK also starts anonymous sentinel-id capture (pageview per load, exception events) for every PENDING visitor. Comments now state the real blast radius at the config default, the init site, and the reject() docblock. Claude-Session: https://claude.ai/code/session_015AXhHayqcLntuU3AbX7No8
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WalkthroughAdds a disabled-by-default PostHog cookieless-mode configuration. When enabled, rejected consent emits an anonymous ChangesPostHog cookieless configuration
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The decline flow may persist an anonymous analytics identifier after consent is rejected, which could violate the intended no-persistent-identifier behavior. Merge should wait until persistence is restored to memory before cleanup and the rejection tests are updated. Sequence Diagram(s)sequenceDiagram
participant Visitor
participant useCookieConsent
participant PostHOGSDK
Visitor->>useCookieConsent: Reject consent
useCookieConsent->>PostHOGSDK: Opt out of capturing
useCookieConsent->>PostHOGSDK: Capture consent_choice accepted false
useCookieConsent->>PostHOGSDK: Reset identity
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Inline comments:
In `@src/modules/legal/composables/useCookieConsent.js`:
- Around line 158-160: Update the rejection flow in useCookieConsent so
persistence is set to memory before calling opt_out_capturing(), allowing
existing PostHog storage to be cleared; preserve the cookieless capture before
the final reset(), and update the rejection tests to verify this ordering and
behavior.
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Dockerfilesrc/config/defaults/development.config.jssrc/lib/plugins/posthog.jssrc/lib/plugins/tests/posthog.unit.tests.jssrc/modules/legal/composables/useCookieConsent.jssrc/modules/legal/tests/useCookieConsent.unit.tests.js
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…reject() A prior accept() upgrades persistence to localStorage+cookie; without dropping back to memory first, the opt-out/reset chain in a later reject() could write an anonymous id to persistent storage. The downgrade migration also clears the previously written storage. Ordering asserted in tests (set_config before opt_out). Claude-Session: https://claude.ai/code/session_015AXhHayqcLntuU3AbX7No8
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Closes #4587
cookielessModeconfig flag (same pattern as the other posthog flags; Docker build-arg, default off — absent flag = byte-identical behavior).reject()emits one anonymousconsent_choice { accepted: false }through the SDK'scookieless_mode: 'on_reject'path. Capture runs BEFOREreset()— reset would overwrite the cookieless sentinel identity (asserted by an ordering test).opt_out_capturing_by_default, the flag also enables anonymous sentinel-id pre-consent capture (one $pageview per load, $exception when errorTracking is on) for undecided visitors — stated at the config default, the init site, and the reject() docblock.Prerequisite (met): cookieless mode enabled in the PostHog project dashboard; without it, cookieless events are ignored server-side.
Pre-push reviewers: kimi gate OK (1 low noted), manual security pass (SDK-source-verified) — no HIGH, 1 MEDIUM doc-scope gap fixed in the second commit. Full unit suite 2656 green, lint clean.
https://claude.ai/code/session_015AXhHayqcLntuU3AbX7No8
Summary by CodeRabbit
New Features
Bug Fixes