diff --git a/apps/api/src/daemonResponseValidation.ts b/apps/api/src/daemonResponseValidation.ts
index 59d25993..532fea23 100644
--- a/apps/api/src/daemonResponseValidation.ts
+++ b/apps/api/src/daemonResponseValidation.ts
@@ -1,3 +1,4 @@
+import { createHash } from "node:crypto";
 import { Ajv2020, type ValidateFunction } from "ajv/dist/2020.js";
 import {
   RUST_RESPONSE_SCHEMAS,
@@ -63,6 +64,9 @@ const INTERNAL_NETWORK_PORT_FINDING_RECOMMENDATION = "Review whether the host-po
 const DOCKER_DAEMON_STATE_FINDING_RULE = "docker.daemon_state_bind_mount";
 const DOCKER_DAEMON_STATE_FINDING_SUMMARY = "A container has Docker daemon state access that may provide Docker daemon API authority.";
 const DOCKER_DAEMON_STATE_FINDING_RECOMMENDATION = "Review whether this container requires Docker daemon API authority.";
+const COMPOSE_DECLARED_TARGET_NOT_ACTIVE_FINDING_RULE = "docker.compose_declared_target_not_active";
+const COMPOSE_DECLARED_TARGET_NOT_ACTIVE_FINDING_SUMMARY = "A running Docker Compose service declares a dependency whose container is not active.";
+const COMPOSE_DECLARED_TARGET_NOT_ACTIVE_FINDING_RECOMMENDATION = "Review the declared dependency and the target container state.";
 
 // Version-one evidence is intentionally a discriminated Docker observation,
 // not a generic provenance bag. JSON Schema owns each field's closed enum;
@@ -98,6 +102,30 @@ const V4_EVIDENCE_EDGE = {
   cron_schedule_declaration: { relationship: "runs_on", sourcePrefix: "scheduled_job_", targetPrefix: "host_", target: "host_local" },
 } as const;
 
+// Keep the finding identity binding byte-for-byte aligned with core's
+// `collision_resistant_id_component`: a readable slug plus SHA-256 of the
+// untouched subject/target pair.  Finding IDs are not daemon-assigned labels.
+function collisionResistantIdComponent(value: string): string {
+  let slug = "";
+  let emittedSeparator = false;
+  for (const character of value) {
+    if (/^[A-Za-z0-9_.-]$/.test(character)) {
+      slug += character;
+      emittedSeparator = false;
+    } else if (!emittedSeparator) {
+      slug += "-";
+      emittedSeparator = true;
+    }
+  }
+  slug = slug.replace(/^-+|-+$/g, "");
+  const readable = (slug || "identity").slice(0, 48);
+  return `${readable}--${createHash("sha256").update(value).digest("hex")}`;
+}
+
+function composeDeclaredTargetFindingId(subjectRef: string, targetRef: string): string {
+  return `finding_docker_compose_declared_target_not_active_${collisionResistantIdComponent(`${subjectRef}\u001f${targetRef}`)}`;
+}
+
 function hasCompleteProviderStateVector(payload: unknown): boolean {
   if (!payload || typeof payload !== "object") return false;
   const providerStates = (payload as { providerStates?: unknown }).providerStates;
@@ -282,6 +310,32 @@ function hasCoherentFindings(payload: unknown): boolean {
           && typeof evidence.providerRevision === "string"
           && evidence.providerRevision !== String(evidence.collectedAt);
       })();
+    if (finding.ruleId === COMPOSE_DECLARED_TARGET_NOT_ACTIVE_FINDING_RULE) return finding.severity === "advisory"
+      && finding.summary === COMPOSE_DECLARED_TARGET_NOT_ACTIVE_FINDING_SUMMARY
+      && finding.recommendation === COMPOSE_DECLARED_TARGET_NOT_ACTIVE_FINDING_RECOMMENDATION
+      && typeof finding.subjectRef === "string"
+      && finding.subjectRef.startsWith("docker_container_")
+      && typeof finding.targetRef === "string"
+      && finding.targetRef.startsWith("docker_container_")
+      && finding.subjectRef !== finding.targetRef
+      && finding.id === composeDeclaredTargetFindingId(finding.subjectRef, finding.targetRef)
+      && Array.isArray(finding.evidenceRefs)
+      && finding.evidenceRefs.length === 1
+      && (() => {
+        const candidateEvidence = finding.evidenceRefs[0];
+        if (!candidateEvidence || typeof candidateEvidence !== "object") return false;
+        const evidence = candidateEvidence as Record<string, unknown>;
+        return evidence.version === 1
+          && evidence.provider === "docker"
+          && evidence.kind === "docker_compose_depends_on"
+          && evidence.assertionKind === "observed"
+          && evidence.summary === "Docker recorded Compose dependency declaration"
+          && evidence.subjectRef === finding.subjectRef
+          && (evidence.providerSlot === undefined || evidence.providerSlot === null)
+          && evidence.freshness === "fresh"
+          && typeof evidence.providerRevision === "string"
+          && evidence.providerRevision !== String(evidence.collectedAt);
+      })();
     if (finding.ruleId !== INTERNAL_NETWORK_PORT_FINDING_RULE) return false;
     return finding.severity === "advisory"
       && finding.summary === INTERNAL_NETWORK_PORT_FINDING_SUMMARY
diff --git a/apps/api/test/security.test.ts b/apps/api/test/security.test.ts
index ee625409..0e3bacba 100644
--- a/apps/api/test/security.test.ts
+++ b/apps/api/test/security.test.ts
@@ -934,6 +934,14 @@ test("authenticated browser API pass-through responses preserve Rust schemas acr
       assert.ok(validator, `missing ${schemaName} validator`);
       const body = await response.json();
       assert.equal(validator(body), true, `${path}: ${JSON.stringify(validator.errors)}`);
+      if (canonicalPath === "/api/findings") {
+        const findingList = (body as { findings?: unknown }).findings;
+        assert.ok(Array.isArray(findingList));
+        assert.ok(findingList.some((finding) => (
+          finding && typeof finding === "object"
+          && (finding as { ruleId?: unknown }).ruleId === "docker.compose_declared_target_not_active"
+        )), `${path} must preserve the canonical Compose target finding`);
+      }
     }
   }
   assert.ok(
@@ -1040,7 +1048,13 @@ test("daemon model responses require non-empty revision and complete provider st
     ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[0].evidenceRefs[0].freshness = "stale"; return value; })()],
     ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[2].targetRef = "host_risk_untrusted"; return value; })()],
     ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[1].evidenceRefs[1].kind = "docker_volume_mount"; return value; })()],
-    ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[1].evidenceRefs[0].providerRevision = String(value.findings[1].evidenceRefs[0].collectedAt); return value; })()]
+    ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[1].evidenceRefs[0].providerRevision = String(value.findings[1].evidenceRefs[0].collectedAt); return value; })()],
+    ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[3].summary = "DOCKERMAP_TEST_FORGED_COMPOSE_FINDING"; return value; })()],
+    ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[3].id = "finding_docker_compose_declared_target_not_active_forged"; return value; })()],
+    ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[3].evidenceRefs[0].freshness = "stale"; return value; })()],
+    ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[3].evidenceRefs[0].kind = "docker_network_membership"; return value; })()],
+    ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[3].evidenceRefs[0].providerSlot = "project_npm"; return value; })()],
+    ["/daemon/findings", (() => { const value = structuredClone(findings); value.findings[3].unsafe = "DOCKERMAP_TEST_EXTRA"; return value; })()]
   ] as const;
   for (const [daemonPath, body] of invalidResponses) {
     const daemon = await startStubDaemon((req, res) => {
diff --git a/tests/fixtures/contracts/findings-response.json b/tests/fixtures/contracts/findings-response.json
index e76b82d5..db3f7007 100644
--- a/tests/fixtures/contracts/findings-response.json
+++ b/tests/fixtures/contracts/findings-response.json
@@ -85,6 +85,29 @@
           "freshness": "fresh"
         }
       ]
+    },
+    {
+      "id": "finding_docker_compose_declared_target_not_active_docker_container_compose_source-docker_container--bf87ab2e9b1b8b7f49304dbc1fa040e0bf4c561c8585b686be888110fb646715",
+      "ruleId": "docker.compose_declared_target_not_active",
+      "severity": "advisory",
+      "summary": "A running Docker Compose service declares a dependency whose container is not active.",
+      "recommendation": "Review the declared dependency and the target container state.",
+      "subjectRef": "docker_container_compose_source",
+      "targetRef": "docker_container_compose_target",
+      "evidenceRefs": [
+        {
+          "version": 1,
+          "id": "docker_compose_depends_on:docker_container_compose_source:docker_container_compose_target",
+          "provider": "docker",
+          "kind": "docker_compose_depends_on",
+          "assertionKind": "observed",
+          "summary": "Docker recorded Compose dependency declaration",
+          "subjectRef": "docker_container_compose_source",
+          "collectedAt": 1710000000000,
+          "providerRevision": "fixture-docker-observation",
+          "freshness": "fresh"
+        }
+      ]
     }
   ]
 }