fix(runner): project ACPX session identity

packages/paperclip-runner/src/cli/acpx-runtime-sidecar.ts

@@ -23,6 +23,7 @@ import {
   type NormalizedAcpForm,
 } from "../drivers/acpx/acp-question-adapter.js";
 import { openCodexAcpxRuntime } from "../drivers/acpx/codex-runtime-adapter.js";
+import { acpxProviderSessionIdentity } from "../drivers/acpx/recovery-identity.js";
 import {
   resolveQualifiedAcpxProfile,
   type QualifiedAcpxAgent,
@@ -282,7 +283,7 @@ async function dispatch(
       startedAt: new Date().toISOString(),
     });
     return {
-      identity: opened.identity,
+      identity: acpxProviderSessionIdentity(openedHost.identity()),
       sidecarPid: process.pid,
       status: opened.status,
     };
@@ -397,7 +398,7 @@ async function dispatch(
   if (request.command === "session.read") {
     const activeHost = requireHost();
     return {
-      identity: activeHost.identity(),
+      identity: acpxProviderSessionIdentity(activeHost.identity()),
       status: sanitizeRuntimeStatus(
         await readSidecarHostStatusWithin(activeHost),
       ),
@@ -406,7 +407,7 @@ async function dispatch(
   if (request.command === "session.snapshot") {
     const activeHost = requireHost();
     return {
-      identity: activeHost.identity(),
+      identity: acpxProviderSessionIdentity(activeHost.identity()),
       status: sanitizeRuntimeStatus(
         await readSidecarHostStatusWithin(activeHost),
       ),
@@ -425,7 +426,7 @@ async function dispatch(
     // still serialized, and retainActiveHostCleanup keeps admission closed
     // until one sequential close proves ownership was released.
     const activeHost = requireHost({ allowCleanupRetry: true });
-    const identity = activeHost.identity();
+    const identity = acpxProviderSessionIdentity(activeHost.identity());
     await closeSidecarHostForCommand(
       activeHost,
       boundedOptionalText(request.params.reason, "Paperclip suspension", 4_000),

packages/paperclip-runner/src/drivers/acpx/recovery-identity.test.ts

@@ -8,6 +8,7 @@ import { afterEach, describe, expect, it } from "vitest";
 import { resolveQualifiedAcpxProfile } from "./qualified-profiles.js";
 import {
   ACPX_IDENTITY_RECORD_SCHEMA,
+  acpxProviderSessionIdentity,
   createAcpxIdentityRecord,
   createAcpxRecoveryBinding,
   verifyExpectedAcpxIdentity,
@@ -41,6 +42,18 @@ describe("ACPX recovery identity", () => {
       normalizedSessionId: "session-1",
       permissionMode: "approve-reads",
     });
+    expect(acpxProviderSessionIdentity(record)).toEqual({
+      kind: "acpx",
+      normalizedSessionId: "session-1",
+      acpxRecordId: fixture.expected.acpxRecordId,
+      backendSessionId: fixture.expected.backendSessionId,
+      agentSessionId: fixture.expected.agentSessionId,
+      profileDigest: fixture.binding.profileDigest,
+      workspaceDigest: fixture.binding.workspaceDigest,
+      requestedModel: fixture.binding.requestedModel,
+      effectiveModel: fixture.binding.effectiveModel,
+      permissionMode: "approve-reads",
+    });
     expect(() =>
       verifyExpectedAcpxIdentity(fixture.expected, fixture.binding, record),
     ).not.toThrow();

packages/paperclip-runner/src/drivers/acpx/recovery-identity.ts

@@ -114,6 +114,24 @@ export function createAcpxIdentityRecord(
   };
 }
 
+/** Project the private persisted record into the PRP sidecar wire identity. */
+export function acpxProviderSessionIdentity(
+  record: AcpxIdentityRecord,
+): AcpxExpectedSessionIdentity {
+  return {
+    kind: "acpx",
+    normalizedSessionId: record.normalizedSessionId,
+    acpxRecordId: record.acpxRecordId,
+    backendSessionId: record.backendSessionId,
+    agentSessionId: record.agentSessionId,
+    profileDigest: record.profileDigest,
+    workspaceDigest: record.workspaceDigest,
+    requestedModel: record.requestedModel,
+    effectiveModel: record.effectiveModel,
+    permissionMode: record.permissionMode,
+  };
+}
+
 /**
  * Verify both the controller-provided identity and a persisted runtime record.
  * Only the complete v1 record is recoverable. Draft schema-less and