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synthetic_intents.py: seeded IntentScriptSpec -> CycleSpec scripts (script_hash + outcomes_hash determinism, V0 discipline); per-scenario router ExecConfig constructed directly (no env mutation); cycle executor runs full ENTER->terminal->flatten lifecycles with per-scenario terminal predicates and cycle-end invariants (working registry empty, driver drained, slot flat). exec_harness.py: composition root — production bundle (MOCK, injected ScriptedVenue), ExecDeadlineDriver ports wired, pump = venue.reconcile() -> kernel + driver.on_fill forwarding (the production seam), gate report via the ExecGateReport schema, archive next to V0 reports. scripted_venue.py amendment: MARKET orders never rest (venue realism — directives are keyed by trade_id and the R1 MARKET fallback shares the position's trade_id). Matrix green through the REAL kernel at 100ms TTL: immediate fill, rest-then-fill (deadline cancelled), fill-races-cancel (no retry), rest-expire-retry (-r1 opens), retry-exhaust skip|market, exit-expire -> MARKET same trade_id, post-only reject, cancel-reject (no strand). Two runs same seed -> identical outcomes_hash. Router 77 green; shared clean. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>