diff --git a/scripts/lib/external-extension-lifecycle-deployment-authority.mjs b/scripts/lib/external-extension-lifecycle-deployment-authority.mjs
new file mode 100644
index 000000000..0ce2ca226
--- /dev/null
+++ b/scripts/lib/external-extension-lifecycle-deployment-authority.mjs
@@ -0,0 +1,109 @@
+import { evaluateAcquisitionDeploymentEvidence } from "./acquisition-deployment-evidence.mjs";
+import { evaluateExternalExtensionLifecycleOperabilityEvidence } from "./external-extension-lifecycle-operability-evidence.mjs";
+
+const REPOSITORY = "ContextualWisdomLab/noema";
+const SIGNER_WORKFLOW = `${REPOSITORY}/.github/workflows/cd.yml`;
+const PREDICATE_TYPE = "https://contextualwisdomlab.org/attestations/noema-lifecycle-operability/v1";
+const OIDC_ISSUER = "https://token.actions.githubusercontent.com";
+const SHA256 = /^[0-9a-f]{64}$/u;
+
+function isRecord(value) {
+  return value !== null && typeof value === "object" && !Array.isArray(value);
+}
+
+function addCheck(checks, failures, code, pass, detail) {
+  checks.push({ code, pass });
+  if (!pass) failures.push({ code, detail });
+}
+
+function boundedFailureCodes(evaluation) {
+  if (!Array.isArray(evaluation?.failures)) return "unknown";
+  const codes = evaluation.failures
+    .map((failure) => typeof failure?.code === "string" ? failure.code : "invalid_failure")
+    .slice(0, 12);
+  return codes.length === 0 ? "unknown" : codes.join(",");
+}
+
+/**
+ * Bind remote lifecycle observations to canonical deployment authority and an independently
+ * verified lifecycle-evidence attestation receipt.
+ *
+ * `lifecycleEvidenceSha256` must be computed by the descriptor-safe caller from the exact retained
+ * evidence bytes; accepting an evidence-supplied digest here would make the binding circular.
+ * Cryptographic verification remains an external release operation: this function validates the
+ * retained verification receipt and its binding, while evaluateAcquisitionDeploymentEvidence keeps
+ * ownership of release/deployment/governance/Sigstore authority.
+ */
+export function evaluateExternalExtensionLifecycleOperabilityEvidenceWithDeploymentAuthority(
+  evidence,
+  deploymentAuthorityInput,
+  lifecycleEvidenceSha256,
+  lifecycleVerificationReceipt,
+) {
+  const lifecycle = evaluateExternalExtensionLifecycleOperabilityEvidence(evidence);
+  const deploymentAuthority = evaluateAcquisitionDeploymentEvidence(deploymentAuthorityInput);
+  const checks = [...lifecycle.checks];
+  const failures = [...lifecycle.failures];
+
+  addCheck(
+    checks,
+    failures,
+    "deployment_authority",
+    deploymentAuthority.pass === true,
+    deploymentAuthority.pass === true
+      ? "canonical acquisition deployment authority passed"
+      : `canonical acquisition deployment authority failed (${boundedFailureCodes(deploymentAuthority)})`,
+  );
+
+  const deployment = isRecord(deploymentAuthorityInput?.deploymentEvidence)
+    ? deploymentAuthorityInput.deploymentEvidence
+    : {};
+  const source = isRecord(deployment.source) ? deployment.source : {};
+  const deploymentNode = isRecord(deployment.deployment) ? deployment.deployment : {};
+  const deploymentCommitSha = source.commitSha;
+  const expectedTag = deploymentAuthorityInput?.expectedTag;
+  const lifecycleRevisionBound = deploymentAuthority.pass === true
+    && isRecord(evidence)
+    && typeof deploymentCommitSha === "string"
+    && evidence.protected_main_sha === deploymentCommitSha
+    && evidence.deployed_worker_sha === deploymentCommitSha;
+  addCheck(
+    checks,
+    failures,
+    "deployment_revision_binding",
+    lifecycleRevisionBound,
+    "lifecycle protected/deployed revision must equal the exact commit authorized by canonical acquisition deployment evidence",
+  );
+
+  const receipt = isRecord(lifecycleVerificationReceipt) ? lifecycleVerificationReceipt : {};
+  const lifecycleReceiptValid = deploymentAuthority.pass === true
+    && lifecycleRevisionBound
+    && typeof lifecycleEvidenceSha256 === "string"
+    && SHA256.test(lifecycleEvidenceSha256)
+    && receipt.schemaVersion === 1
+    && receipt.verified === true
+    && receipt.repository === REPOSITORY
+    && receipt.releaseTag === expectedTag
+    && receipt.commitSha === deploymentCommitSha
+    && receipt.lifecycleEvidenceSha256 === lifecycleEvidenceSha256
+    && receipt.signerWorkflow === SIGNER_WORKFLOW
+    && receipt.predicateType === PREDICATE_TYPE
+    && receipt.oidcIssuer === OIDC_ISSUER
+    && receipt.denySelfHostedRunners === true
+    && typeof deploymentNode.workflowRunUrl === "string"
+    && receipt.workflowRunUrl === deploymentNode.workflowRunUrl;
+  addCheck(
+    checks,
+    failures,
+    "lifecycle_attestation_receipt",
+    lifecycleReceiptValid,
+    "lifecycle evidence must be bound to its exact retained-byte SHA-256 by a verified trusted-workflow receipt for the same release, commit, and deployment run",
+  );
+
+  return {
+    status: failures.length === 0 ? "PASS" : "FAIL",
+    checks,
+    failures,
+    metrics: lifecycle.metrics,
+  };
+}
diff --git a/test/external-extension-lifecycle-operability-provenance.test.ts b/test/external-extension-lifecycle-operability-provenance.test.ts
new file mode 100644
index 000000000..aefbff69a
--- /dev/null
+++ b/test/external-extension-lifecycle-operability-provenance.test.ts
@@ -0,0 +1,168 @@
+import { describe, expect, it } from "vitest";
+import { evaluateExternalExtensionLifecycleOperabilityEvidence } from "../scripts/lib/external-extension-lifecycle-operability-evidence.mjs";
+import { evaluateExternalExtensionLifecycleOperabilityEvidenceWithDeploymentAuthority } from "../scripts/lib/external-extension-lifecycle-deployment-authority.mjs";
+
+const latency = (value: number, count = 100): number[] => Array.from({ length: count }, () => value);
+const lifecycleEvidenceSha256 = "e".repeat(64);
+
+function passingLifecycleEvidence(commitSha = "a".repeat(40)) {
+  return {
+    schema_version: 1,
+    source_kind: "cloudflare_durable_object_remote",
+    repository_full_name: "ContextualWisdomLab/noema",
+    protected_main_sha: commitSha,
+    deployed_worker_sha: commitSha,
+    observed_at: "2026-09-09T12:30:00.000Z",
+    binding_name: "NOEMA_EXTERNAL_EXTENSION_LIFECYCLE",
+    storage_backend: "sqlite",
+    read_current: { planned_samples: 100, latency_ms: latency(7), failure_count: 0, warmup_excluded_count: 0 },
+    contended_append: {
+      planned_samples: 100,
+      latency_ms: latency(12),
+      failure_count: 0,
+      warmup_excluded_count: 0,
+      contention_trials: 50,
+      accepted_winners: 50,
+      conflict_losers: 50,
+    },
+    recovery: {
+      retained_event_count: 137,
+      complete_audit_rebuild_verified: true,
+      restart_recovery_verified: true,
+      rollback_recovery_verified: true,
+      malformed_head_rejected: true,
+      truncated_audit_rejected: true,
+    },
+    storage: { bytes_before: 12_288, bytes_after: 98_304 },
+  };
+}
+
+function passingDeploymentAuthority(commitSha = "a".repeat(40)) {
+  const tag = "v0.1.0";
+  const workflowRunUrl = "https://github.com/ContextualWisdomLab/noema/actions/runs/34390000000";
+  const deploymentEvidenceSha256 = "d".repeat(64);
+  return {
+    expectedTag: tag,
+    deploymentEvidenceSha256,
+    deploymentEvidence: {
+      schemaVersion: 1,
+      generatedAt: "2026-09-09T12:00:00.000Z",
+      source: { repository: "ContextualWisdomLab/noema", releaseTag: tag, releaseRef: `refs/tags/${tag}`, commitSha },
+      deployment: {
+        environment: "production",
+        workerName: "noema",
+        trafficPercentage: 100,
+        workflowRunUrl,
+        deployedAt: "2026-09-09T12:05:00.000Z",
+        deploymentCreatedAt: "2026-09-09T12:04:00.000Z",
+      },
+      validation: {
+        immutableRelease: true,
+        strictKpi: true,
+        smokePassed: true,
+        kpiExecutedAt: "2026-09-09T12:06:00.000Z",
+        smokeTimestamp: "2026-09-09T12:07:00.000Z",
+      },
+    },
+    governanceEvidence: {
+      schema_version: 1,
+      repository: "ContextualWisdomLab/noema",
+      environment: "production",
+      status: "PASS",
+      reviewer_count: 1,
+      reviewers: ["release-reviewer"],
+      checks: [{ code: "deployment_reviewer", pass: true }],
+      failures: [],
+    },
+    attestationBundle: {
+      mediaType: "application/vnd.dev.sigstore.bundle.v0.3+json",
+      verificationMaterial: {},
+      dsseEnvelope: { payload: "signed-payload", signatures: [{ sig: "signed" }] },
+    },
+    verificationReceipt: {
+      schemaVersion: 1,
+      verified: true,
+      repository: "ContextualWisdomLab/noema",
+      releaseTag: tag,
+      commitSha,
+      deploymentEvidenceSha256,
+      signerWorkflow: "ContextualWisdomLab/noema/.github/workflows/cd.yml",
+      predicateType: "https://contextualwisdomlab.org/attestations/noema-deployment/v1",
+      oidcIssuer: "https://token.actions.githubusercontent.com",
+      denySelfHostedRunners: true,
+      workflowRunUrl,
+    },
+  };
+}
+
+function passingLifecycleReceipt(commitSha = "a".repeat(40)) {
+  return {
+    schemaVersion: 1,
+    verified: true,
+    repository: "ContextualWisdomLab/noema",
+    releaseTag: "v0.1.0",
+    commitSha,
+    lifecycleEvidenceSha256,
+    signerWorkflow: "ContextualWisdomLab/noema/.github/workflows/cd.yml",
+    predicateType: "https://contextualwisdomlab.org/attestations/noema-lifecycle-operability/v1",
+    oidcIssuer: "https://token.actions.githubusercontent.com",
+    denySelfHostedRunners: true,
+    workflowRunUrl: "https://github.com/ContextualWisdomLab/noema/actions/runs/34390000000",
+  };
+}
+
+function evaluateBound(evidence = passingLifecycleEvidence(), authority = passingDeploymentAuthority(), receipt = passingLifecycleReceipt(), digest = lifecycleEvidenceSha256) {
+  return evaluateExternalExtensionLifecycleOperabilityEvidenceWithDeploymentAuthority(evidence, authority, digest, receipt);
+}
+
+function failureCodes(result: { failures: Array<{ code: string }> }) {
+  return result.failures.map((failure) => failure.code);
+}
+
+describe("external-extension lifecycle deployment provenance binding", () => {
+  it("accepts lifecycle evidence only when deployment authority and its exact evidence attestation receipt agree", () => {
+    const result = evaluateBound();
+    expect(result.status).toBe("PASS");
+    expect(result.failures).toEqual([]);
+    expect(result.checks).toEqual(expect.arrayContaining([
+      { code: "deployment_authority", pass: true },
+      { code: "deployment_revision_binding", pass: true },
+      { code: "lifecycle_attestation_receipt", pass: true },
+    ]));
+  });
+
+  it("rejects a shape-valid lifecycle observation whose revision is not the canonical deployed release commit", () => {
+    const forged = passingLifecycleEvidence("b".repeat(40));
+    expect(evaluateExternalExtensionLifecycleOperabilityEvidence(forged).status).toBe("PASS");
+    const result = evaluateBound(forged);
+    expect(result.status).toBe("FAIL");
+    expect(failureCodes(result)).toEqual(expect.arrayContaining([
+      "deployment_revision_binding",
+      "lifecycle_attestation_receipt",
+    ]));
+  });
+
+  it("rejects lifecycle content that is not bound to the independently verified retained-byte digest", () => {
+    const receipt = passingLifecycleReceipt();
+    receipt.lifecycleEvidenceSha256 = "f".repeat(64);
+    const result = evaluateBound(passingLifecycleEvidence(), passingDeploymentAuthority(), receipt);
+    expect(result.status).toBe("FAIL");
+    expect(failureCodes(result)).toContain("lifecycle_attestation_receipt");
+  });
+
+  it("fails closed when canonical release provenance or trusted receipt identity is invalid", () => {
+    const authority = passingDeploymentAuthority();
+    authority.verificationReceipt.releaseTag = "v9.9.9";
+    expect(failureCodes(evaluateBound(passingLifecycleEvidence(), authority))).toEqual(expect.arrayContaining([
+      "deployment_authority",
+      "deployment_revision_binding",
+      "lifecycle_attestation_receipt",
+    ]));
+
+    const receipt = passingLifecycleReceipt();
+    receipt.signerWorkflow = "ContextualWisdomLab/noema/.github/workflows/untrusted.yml";
+    expect(failureCodes(evaluateBound(passingLifecycleEvidence(), passingDeploymentAuthority(), receipt))).toContain(
+      "lifecycle_attestation_receipt",
+    );
+  });
+});