[assassin808]

New projects still installed the legacy Knobe sample and protocol-only projects skipped the Study view. This makes the desktop and online IDE protocol-first, with a real source-linked example that opens without an agent build.

• Replace the shipped example with the independently reviewed CC BY Mazzarella 2018 protocol, both studies, exact paper, evidence and a byte-bound participant preview. Preserve existing user projects.
• Show the protocol in Study, support condition/source comparison, reject stale previews, preserve complete source passages and retain a details view for metadata, omissions and analysis.
• Route new build/refine/view/query prompts to protocol; guard checkpoint saves against stale writes. Keep legacy maintenance and standalone compatibility explicit rather than silently converting scientific content.
• Fix a result-page crash on valid lists/maps of citations; preserve every referenced page/file. Include protocol/study local history and route protocol versions through existing privacy/consent-gated artifact capture.
• Replace forest-green dark surfaces with neutral charcoal in the app, new previews and artifact kit. Add local build-output retention guidance.

Validation: schema/card hash and full engine/source checks pass on the sample; real browser sample creation, condition comparison and source split at PDF page 5; both studies finish and write a non-official report with a local test responder. TypeScript and desktop/web bundles pass. Six real web IPC/import tests, 19 Python script tests, and affected Node suites pass; full offline rerun and Windows CI are pending. No paid model, database migration, merge, release or production promotion.

Stacked on #97. Review the delta against its branch first. See docs/protocol-first-walkthrough.md for the stable-release gates, including real hosted extraction acceptance, packaged upgrade/physical Windows acceptance, online promotion and the remaining legacy Studio/standalone integrations. These are not claimed completed by offline tests.