L90 · Precedent re-read before re-implementation — NEO
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parity reference

L90 Precedent re-read before re-implementation

codified 2026-04-26 · V129-S4 · 3 references

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

Authority

This lesson is recorded as reference doctrine on the parity surface, sealed at stage V129-S4. Mutations of the rules it governs require operator-directive trace plus verifier sign-off (Rule 13.1.c).

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L91 · Backtest parity is a function, not code