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3,821 commits this week Apr 14, 2026 - Apr 21, 2026
[Dijkstra] CIP-159-07: Version gating for CIP-159 fields (#1119)
Extend `UsesV4Features` to detect CIP-159 transaction fields and update
`allowedLanguagesLegacyMode` to forbid them in legacy mode.

+  Add hasDirectDeposits and hasBalanceIntervals constructors to
   `UsesV4Features`, detecting non-empty
   `txDirectDeposits`/`txBalanceIntervals`.
+  Prepend `UsesV4Features` check to `allowedLanguagesLegacyMode`,
   returning ∅ when V4 features are present (making legacy rule unsatisfiable).
+  Update `Dec-UsesV4Features` instance for the two new constructors.
+  Document the CIP-159/CIP-118 interaction for version gating.

No changes to `Utxow/Properties/Computational.lagda.md`; premise shapes are
unchanged since no new fields are added to `UTXOW-legacy` or `UTXOW-normal`.
[Dijkstra] CIP-159-07: Use explicit legacy premises instead of allowedLanguagesLegacyMode
Address Carlos's review: `allowedLanguagesLegacyMode` is intended for use
*within* legacy mode to select among V1–V3 versions, not to gate entry
into legacy mode.

`Utxow.lagda.md`:
+  Revert allowedLanguagesLegacyMode to its original form (remove
   UsesV4Features check)
+  Add explicit `Is-∅ (dom txDirectDeposits)` and
   `Is-∅ (dom txBalanceIntervals)` premises to UTXOW-legacy
+  Update `UTXOW-legacy-⋯` pattern synonym for 13 premises
+  Revise documentation to describe the premise-based approach

`Utxow/Properties/Computational.lagda.md`:
+  Update computeProof and completeness for the new legacy tuple arity.
[Dijkstra] CIP-159-07: Use explicit legacy premises instead of allowedLanguagesLegacyMode
Address Carlos's review: `allowedLanguagesLegacyMode` is intended for use
*within* legacy mode to select among V1–V3 versions, not to gate entry
into legacy mode.

`Utxow.lagda.md`:
+  Revert allowedLanguagesLegacyMode to its original form (remove
   UsesV4Features check)
+  Add explicit `Is-∅ (dom txDirectDeposits)` and
   `Is-∅ (dom txBalanceIntervals)` premises to UTXOW-legacy
+  Update `UTXOW-legacy-⋯` pattern synonym for 13 premises
+  Revise documentation to describe the premise-based approach

`Utxow/Properties/Computational.lagda.md`:
+  Update computeProof and completeness for the new legacy tuple arity.
[Dijkstra] CIP-159-07: Version gating for CIP-159 fields (#1119)
Extend `UsesV4Features` to detect CIP-159 transaction fields and update
`allowedLanguagesLegacyMode` to forbid them in legacy mode.

+  Add hasDirectDeposits and hasBalanceIntervals constructors to
   `UsesV4Features`, detecting non-empty
   `txDirectDeposits`/`txBalanceIntervals`.
+  Prepend `UsesV4Features` check to `allowedLanguagesLegacyMode`,
   returning ∅ when V4 features are present (making legacy rule unsatisfiable).
+  Update `Dec-UsesV4Features` instance for the two new constructors.
+  Document the CIP-159/CIP-118 interaction for version gating.

No changes to `Utxow/Properties/Computational.lagda.md`; premise shapes are
unchanged since no new fields are added to `UTXOW-legacy` or `UTXOW-normal`.
[Dijkstra] CIP-159-04: Update certificate rules for partial withdrawals (#1116)
CIP-159 changes withdrawal semantics from "all-or-nothing" (withdrawal
amount must equal the full account balance) to "partial" (any amount up
to the current balance may be withdrawn).

`Certs.lagda.md`:
+  Define _≤ᵐ_ relation and Dec-≤ᵐ decision procedure for comparing a
   Coin value against a Maybe Coin (just bal → amt ≤ bal; nothing → ⊥).
+  Define applyWithdrawals helper (fold-based pointwise subtraction of
   withdrawal amounts from account balances).
+  Relax PRE-CERT precondition to three premises: credential is a
   registered key hash, credential is in dom rewards, and withdrawal
   amount ≤ balance (via ≤ᵐ with lookupᵐ?).
+  Update PRE-CERT effect from zeroing withdrawn credentials to pointwise
   subtraction via applyWithdrawals.
+  Document partial withdrawal semantics and version restriction deferral.

`Certs/Properties/Computational.lagda.md`:
+  Add scoped ⁇-≤ᵐ instance (positioned after DELEG/POOL/GOVCERT/CERT
   proofs to avoid instance pollution).
+  Update Computational-PRE-CERT for the new three-premise precondition.