Track 3 pilot · self-attribution capture (MVP · 4 stimuli)

Was that outcome caused by you or by the environment?

A minimum-viable browser tool for the TRB Track 3 pilot (docs/track3_pilot/README.md). Four stimuli — notification dismiss, scroll position, word count, emoji picker — each in an A-arm (agent-caused, you act) or B-arm (environment-caused, app injects). After every stimulus you get one question: did that happen because of what you did, or because of the environment? The app's arm log is the ground truth; your answer is what Track 3 measures against.

Consent + safety. This is a pilot MVP. Nothing you type is sent anywhere — everything lives in your browser. At the end, hit Download results to save the labeled JSON. If you'd like to contribute your run to the Track 3 seed dataset, email the file to hello@use-trace.ai — that is your second consent event per collection protocol §7. Otherwise, delete the file and no data leaves your machine.

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