feat(domain): add the tutor event-envelope tracer - #16
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| const Rfc3339Schema = Schema.String.check( | ||
| Schema.isPattern(/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z$/), | ||
| ); |
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For event input such as 2026-99-99T99:99:99Z, this pattern succeeds even though the value is not a valid RFC 3339 timestamp. Consequently decodeEventEnvelopeV1 accepts malformed dates and foldEvents may order them lexicographically as legitimate events, violating the tracer's fail-closed input boundary; validate the parsed calendar date and time rather than only their digit shape.
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Design spec
design-specs/0014-tutor-event-envelope-tracer.mdJourney
A maintainer runs a deterministic tutor lifecycle tracer that decodes commands, accepts lawful transitions, rejects stale or illegal transitions, and emits replayable envelopes and receipts.
Experience it
Evidence
What is real
The in-memory command/event/receipt seam is executable and deterministic. It does not claim D1 persistence, Worker routing, scheduling semantics, provider behavior, deployment, or production acceptance.