R4.5: precommit one causal Control Pulse

[yava-code]

Outcome

Adds one deterministic Explain-to-Break pulse: the developer commits a causal prediction before PureFlow runs an immutable, test-backed fixture boundary. Production agents remain non-blocking.

Evidence

• npm run check
• 63/63 extension tests
• production build and VSIX packaging
• golden claim/probe/attempt hashes
• replay, late, cross-project, projection, timeout, cancellation, and runner-error paths fail closed

Boundary

No arbitrary code, model-generated test, readiness score, or skill-retention claim. Side Coach output is non-executable and the deterministic path requires no model.

[gemini-code-assist]

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[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.