diff --git a/src/server/promptCompletion.ts b/src/server/promptCompletion.ts
index 81306aeb23..59fa48e6ce 100644
--- a/src/server/promptCompletion.ts
+++ b/src/server/promptCompletion.ts
@@ -4,13 +4,13 @@ import { z } from "zod";
 import { uniqueSorted } from "../domain/canonicalOrdering.js";
 import type { JsonValue } from "../domain/jsonValue.js";
 import type { AnalysisOperationPort } from "../application/AnalysisProvider.js";
+import { parseProcessCaptureEvidence } from "../application/process/ProcessEvidence.js";
 import type { BinarySessionPort } from "../application/binary/BinarySessionPort.js";
 import type { PromptCompletionKind } from "../contracts/promptContracts.js";
 import { addressedValueSchema } from "../domain/native/nativeInventory.js";
 import { currentMcpRequestSignal } from "./EvidenceMcpServer.js";
 import { parseArtifactInventoryEvidence } from "../domain/artifactInventoryEvidence.js";
 import { EvidenceIntegrityError } from "../domain/evidenceErrors.js";
-import { parseProcessCapture } from "../domain/process/processCaptureParsing.js";
 
 const documentListSchema = z.array(z.string().min(1));
 const procedureInventorySchema = z.array(
@@ -216,13 +216,20 @@ const artifactInventoryValues = (
 };
 
 const isProcessCaptureEvidence = (evidence: LedgerEvidence): boolean => {
-  if (evidence.operation !== "capture_process_scenario") return false;
-  try {
-    parseProcessCapture(evidence.normalized_result);
-    return true;
-  } catch (cause: unknown) {
-    if (cause instanceof TypeError || cause instanceof z.ZodError) return false;
-    throw cause;
+  const parsed = parseProcessCaptureEvidence(evidence);
+  if (parsed.ok) return true;
+  switch (parsed.error.kind) {
+    case "wrong-workflow":
+    case "unsupported-provider":
+      return false;
+    case "invalid-evidence":
+    case "invalid-capture":
+      if (
+        parsed.error.cause instanceof TypeError ||
+        parsed.error.cause instanceof z.ZodError
+      )
+        return false;
+      throw parsed.error.cause;
   }
 };
 
diff --git a/tests/boundary/mcp/promptCompletion.test.ts b/tests/boundary/mcp/promptCompletion.test.ts
index 8d919c3c7a..77ea4b7574 100644
--- a/tests/boundary/mcp/promptCompletion.test.ts
+++ b/tests/boundary/mcp/promptCompletion.test.ts
@@ -21,6 +21,7 @@ import {
 } from "../../../src/domain/artifactInspection.js";
 import { artifactInventoryResultSchema } from "../../../src/domain/artifactGraph.js";
 import { jsonValueSchema } from "../../../src/domain/jsonValue.js";
+import { PROCESS_PROVIDER } from "../../../src/domain/process/processEvidenceProvider.js";
 import { digestCanonicalValue } from "../../../src/domain/canonicalDigest.js";
 import { createPromptCompletionSource } from "../../../src/server/promptCompletion.js";
 import { observed } from "../../fixtures/analysisExecution.js";
@@ -89,6 +90,42 @@ describe("guided prompt completion from live analysis", () => {
 });
 
 describe("guided prompt completion from investigation records", () => {
+  it("offers only captures admitted by the process comparison identity", async () => {
+    const session = createTestBinarySession(() => client([]));
+    const captureResult = jsonValueSchema.parse(EMPTY_PROCESS_CAPTURE_EXAMPLE);
+    const unsupportedProvider = createEvidence(undefined, fixtureProvider, {
+      predicateType: "rea.process-capture",
+      operation: "capture_process_scenario",
+      parameters: {},
+      result: captureResult,
+      confidence: "observed",
+      authority: "controlled-replay",
+      environment: fixtureEnvironment,
+    });
+    const wrongPredicate = createEvidence(undefined, PROCESS_PROVIDER, {
+      predicateType: "rea.other-process-data",
+      operation: "capture_process_scenario",
+      parameters: {},
+      result: captureResult,
+      confidence: "observed",
+      authority: "controlled-replay",
+      environment: fixtureEnvironment,
+    });
+    for (const evidence of [
+      PROCESS_CAPTURE_REFERENCE,
+      unsupportedProvider,
+      wrongPredicate,
+    ])
+      expect(session.recordEvidence(evidence).ok).toBe(true);
+    const completion = createPromptCompletionSource(session, session);
+
+    expect(await completion.complete("capture", "ev_")).toEqual([
+      PROCESS_CAPTURE_REFERENCE.evidence_id,
+    ]);
+
+    await session.close();
+  });
+
   it("excludes process captures missing canonical executable identity", async () => {
     const session = createTestBinarySession(() => client([]));
     const {
@@ -101,7 +138,8 @@ describe("guided prompt completion from investigation records", () => {
       ...EMPTY_PROCESS_CAPTURE_EXAMPLE,
       manifest: { ...legacyManifest, executable_sha256 },
     };
-    const evidence = createEvidence(undefined, fixtureProvider, {
+    const evidence = createEvidence(undefined, PROCESS_PROVIDER, {
+      predicateType: "rea.process-capture",
       operation: "capture_process_scenario",
       parameters: {},
       result: legacyCapture,
@@ -121,7 +159,8 @@ describe("guided prompt completion from investigation records", () => {
 
   it("projects only validated typed identifiers from the evidence ledger", async () => {
     const session = createTestBinarySession(() => client([]));
-    const invalidCapture = createEvidence(undefined, fixtureProvider, {
+    const invalidCapture = createEvidence(undefined, PROCESS_PROVIDER, {
+      predicateType: "rea.process-capture",
       operation: "capture_process_scenario",
       parameters: {},
       result: {},