Lessons Codified

audit doctrine

L79 · Carry-forward ledger is append-only

Carry-forward entries never back-edit. Status flips OPEN → CLOSED with destination-stage citation.

V129-D

9 references

scorer sealed

L80 · 4-gate orthogonal scorer empirical basis

Discrete-output collapse of the 7-indicator continuous scorer retired. Replaced by orthogonal gates measuring distinct horizons and concepts.

V129-E

governance reference

L81 · Rule mutation traces to operator directive

No rule is mutated without explicit operator directive cited inline. Rule history reads as directive trail, not implementation diary.

V129-E

2 references

audit reference

L82 · Numeric-anchor dual-source audit discipline

Every numeric anchor requires dual-source verification. Single-source assertions reject by audit lane until secondary surface confirms.

V129-S8

scorer doctrine

L83 · Production designation requires whole-axis dominance

Production-status promotion requires beating predecessor on quality axes net of trade-off acknowledgement. Not single-metric victory.

V129-S2

scorer doctrine

L84 · Wider session captures structural alpha

RTH_FULL window captures both open-momentum and closing-drift effects. Trade-off: +1.59pp MaxDD as structural consequence, not regression.

V129-S2

halt reference

L85 · Day-flat enforcement is non-negotiable

EOD forced flatten at 15:55 ET regardless of P&L state. No overnight exposure. No overnight-gap risk.

V129-S2

5 references

governance sealed

L86 · Single-source-of-truth governance

Scorer surface, IPC contract, and JS renderer consolidated into one authoritative path. Parallel paths retired across the chain.

8 references

governance doctrine

L87 · Operator-lane regression-only

Codified as Rule 13.1.c. No progress without prior parity. Mutation requires baseline-bit-identical regression evidence.

5 references

audit doctrine

L88 · Whole-system retirement audit

Dead-in-local-scope detection before any edge wire. Retired surfaces must be confirmed absent across every consumer.

audit doctrine

L89 · Cross-reference enumeration

Every removal requires explicit cross-reference enumeration before commit.

parity reference

L90 · Precedent re-read before re-implementation

Before re-implementing any retired surface, re-read precedent execution and the lesson that retired it.

parity sealed

L91 · Backtest parity is a function, not code

Parity means bit-identical output on shared input. Shared module is not a guarantee. Test the function, not the implementation.

7 references

parity doctrine

L92 · Process-boundary classification

Every cross-process call carries a classification — query, command, event. Classification governs retry, idempotency, and dead-letter posture.

2 references

parity sealed

L93 · Dual-authority READ path

Reads tolerate either authority; writes go through one. Read-after-write consistency is established by the writer, not the reader.