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docs(semantics): clarify remaining proof-boundary work in AGENTS.md

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Body:
- ko_preserves_hyperbola_approx: document the new explicit premise
  (onHyperbolaApprox (forwardStep s Δu) Q16_16.epsilon at line 69)
- aciPreservedByMlgruStep: document the new explicit premise (hBlendACI
  at lines 545-548)
- both retain their TODO(lean-port) tags for the arithmetic lemmas
  (sqrt error bound / triangle inequality + mul monotonicity)

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Brandon Schneider 2026-05-27 15:22:10 -05:00
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commit fba3e2193a
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0-Core-Formalism/lean/Semantics/AGENTS.md
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@ -197,13 +197,13 @@ after narrowly compiling the file under a scratch target.
- `goldenContractionEnergyDecrease` is discharged. Remaining follow-up is a
separate premise-discharge lemma showing when the Burgers golden-contraction
step satisfies `h_pt` and `h_u'_nonneg`.
- `HyperbolicStateSurface.ko_preserves_hyperbola_approx` now makes the
forward-step approximation bound explicit. Remaining follow-up:
`TODO(lean-port)` discharge that premise from a formal `Q16_16.sqrt` error
bound.
- `SSMS.aciPreservedByMlgruStep` now makes the blended hidden-state ACI bound
explicit. Remaining follow-up: discharge that premise from Q16_16 triangle,
multiplication monotonicity, and saturation associativity lemmas.
- `HyperbolicStateSurface.ko_preserves_hyperbola_approx`: former sorry replaced
by explicit premise `onHyperbolaApprox (forwardStep s Δu) Q16_16.epsilon` (line 69).
Remaining: `TODO(lean-port)` discharge that premise from a formal `Q16_16.sqrt`
error-bound lemma.
- `SSMS.aciPreservedByMlgruStep`: former sorry replaced by explicit premise
`hBlendACI` (lines 545–548). Remaining: `TODO(lean-port)` discharge from Q16_16
triangle inequality, multiplication monotonicity, and saturation associativity.
## Key API Notes (Lean 4.30 / this workspace)