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…ing, cumulative budget, hash binding indicator - Raise policyHashSchema minimum from 6 to 12 hex chars (Full Profile SHOULD use SHA-256 / 64 chars) - Add SPA nonce field (auto-generated UUID on createSignedPaymentAuthorization) - Add PolicyGrant signing: createSignedPolicyGrant / verifyPolicyGrantSignature; verifier enforces signature when MPCP_POLICY_GRANT_SIGNING_PUBLIC_KEY_PEM is set (opt-in, backward compatible) - Expose cumulativeSpentMinor in SettlementVerificationContext; thread through pipeline so verifier can enforce alreadySpent + currentPayment <= maxAmountMinor - Add hashBindingChecked to VerificationReport and pipeline output; CLI shows "Hash binding: CHECKED" / "NOT CHECKED (Lite Profile)" accordingly - Flag synthesized PaymentPolicyDecision (_synthesized: true) with console.warn + CLI warning - Update all test policyHash fixtures to 12-char minimum; add new tests for all new features - Update docs/reference/sdk.md with createSignedPolicyGrant, cumulative budget note, new env vars Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
nonce?: string);createSignedPaymentAuthorization()auto-generates a UUID nonce for one-time-use replay trackingsrc/protocol/policyGrant.tswithcreateSignedPolicyGrant()/verifyPolicyGrantSignature(); verifier enforces signature whenMPCP_POLICY_GRANT_SIGNING_PUBLIC_KEY_PEMis set (opt-in, backward compatible)cumulativeSpentMinor?: stringadded toSettlementVerificationContext; budget check becomesalreadySpent + current > maxAmountMinorwhen providedhashBindingChecked?: booleanonVerificationReport; CLI outputsHash binding: CHECKED(Full Profile) orNOT CHECKED (Lite Profile — intentHash absent)decisionFromSpa()marks result_synthesized: true;bundleToContext()warns; CLI shows⚠ Policy decision: SYNTHESIZED FROM SPAcreateSignedPolicyGrant, cumulative budget usage, 3 new env var rowsNew env vars
MPCP_POLICY_GRANT_SIGNING_PRIVATE_KEY_PEMMPCP_POLICY_GRANT_SIGNING_PUBLIC_KEY_PEMMPCP_POLICY_GRANT_SIGNING_KEY_IDmpcp-policy-grant-signing-key-1)Test plan
npm run build— cleannpm test— 180 tests, 21 files, all passtest/protocol/policyGrant.test.ts— 9 tests covering sign/verify/tamper/enforcementtest/protocol/sba.test.tshashBindingCheckedtests intest/verify/verify.test.tstest/cli/formatReport.test.tswith hash binding and synthesized decision tests🤖 Generated with Claude Code