feat(deploy): register Engine MCP materialization transition

infra/deploy-runner/build-engine-mcp-execution-plan-materialization-artifact.mjs

@@ -0,0 +1,289 @@
+#!/usr/bin/env node
+import { createHash } from "node:crypto";
+import { spawnSync } from "node:child_process";
+import { copyFile, lstat, mkdir, mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { dirname, join, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const here = dirname(fileURLToPath(import.meta.url));
+const workspaceRoot = resolve(here, "../../..");
+const engineRoot = resolve(
+  process.env.NODEDC_ENGINE_SOURCE_ROOT || join(workspaceRoot, "NODEDC_ENGINE_INFRA"),
+);
+const artifactRoot = resolve(
+  process.env.NODEDC_DEPLOY_ARTIFACT_DIR || resolve(here, "../deploy-artifacts"),
+);
+const baselineArtifact = resolve(
+  here,
+  "../deploy-artifacts/nodedc-engine-mcp-telemetry-catalog-20260723-035.tgz",
+);
+const baselineArtifactSha256 =
+  "4ce1563612499a19d653a174a4d73632e0aaac7dacd2eca4e7c01c87586b1155";
+const nodeIntelligenceDescriptorPath =
+  "nodedc-source/services/node-intelligence/activation.json";
+const predecessorNodeIntelligenceDescriptorSha256 =
+  "25ed3efd858aaf82c242dba501f0acc0c6c3dc91e8845707a4d3325750eab59f";
+const targetNodeIntelligenceDescriptorSha256 =
+  "03b2ba120c3929e9cf99940ddc927082de376ceff762895a84103144202aef42";
+const predecessorGatewaySha256 =
+  "69bfc91e913a3fad04e13aca86efb9d62f73c0c7d1f8f7200907494b29fa9e8d";
+const targetGatewaySha256 =
+  "9020cf49a3558c0497fed4ecfd81367cbc11b5b249881804c29fe437900c71f8";
+const [patchId = "", ...extra] = process.argv.slice(2);
+if (
+  extra.length
+  || !/^engine-mcp-execution-plan-materialization-\d{8}-\d{3}$/.test(patchId)
+) {
+  throw new Error(
+    "usage: build-engine-mcp-execution-plan-materialization-artifact.mjs "
+    + "<engine-mcp-execution-plan-materialization-YYYYMMDD-NNN>",
+  );
+}
+
+const descriptorPath =
+  "nodedc-source/server/deployTransitions/executionPlanMaterializationV1.json";
+const targetSha256 = Object.freeze({
+  "nodedc-source/server/routes/n8n.js":
+    "391fc81228fdacd6efc6c0868991a3485f71869708e49ac15819db6ccce1bfce",
+  "nodedc-source/server/routes/engineAgentGateway.js":
+    targetGatewaySha256,
+  "nodedc-source/server/l2ExecutionPlan/catalog.js":
+    "c35b4c7ad9319aabbf1366a11ff52a6e99d961893bafdfcb4e84fc5f24fc04be",
+  "nodedc-source/server/l2ExecutionPlan/compiler.js":
+    "beb3f664073f9a372432643936a04d0cb0028cd695f759c68bd053e9cd892fe4",
+  "nodedc-source/server/l2ExecutionPlan/materializer.js":
+    "ee3bcfd06b3a5fa46800df974a2dedfdd55eeaf662329f837486c011a9bd713e",
+  "nodedc-source/server/assets/execution-plans/v1/catalog.json":
+    "a153e040e0a592bad4375b98d9a1d83d148923aa0f0fd47d225b92eda281c4e9",
+  [descriptorPath]:
+    "52c0152cff49c251be5581a9209d2e63ba710c16e815bdd6ece24f7c9dd7e480",
+  [nodeIntelligenceDescriptorPath]:
+    targetNodeIntelligenceDescriptorSha256,
+});
+const entries = Object.freeze(Object.keys(targetSha256));
+const artifact = join(artifactRoot, `nodedc-${patchId}.tgz`);
+
+await assertFresh(artifact);
+await assertExactSources();
+const targetNodeIntelligenceDescriptor =
+  await buildTargetNodeIntelligenceDescriptor();
+const stage = await mkdtemp(
+  join(tmpdir(), "nodedc-engine-mcp-execution-plan-materialization-"),
+);
+try {
+  const payload = join(stage, "payload");
+  for (const relativePath of entries) {
+    const destination = join(payload, relativePath);
+    await mkdir(dirname(destination), { recursive: true });
+    if (relativePath === nodeIntelligenceDescriptorPath) {
+      await writeFile(destination, targetNodeIntelligenceDescriptor, {
+        encoding: "utf8",
+        flag: "wx",
+        mode: 0o644,
+      });
+      continue;
+    }
+    await copyFile(join(engineRoot, relativePath), destination);
+  }
+  await writeFile(
+    join(stage, "manifest.env"),
+    `id=${patchId}\ncomponent=engine\ntype=app-overlay\n`,
+    { encoding: "utf8", flag: "wx", mode: 0o644 },
+  );
+  await writeFile(join(stage, "files.txt"), `${entries.join("\n")}\n`, {
+    encoding: "utf8",
+    flag: "wx",
+    mode: 0o644,
+  });
+  await mkdir(artifactRoot, { recursive: true });
+  run("python3", ["-c", canonicalTarScript(), artifact, stage]);
+  console.log(JSON.stringify({
+    ok: true,
+    patchId,
+    artifact,
+    sha256: digest(await readFile(artifact)),
+    entries,
+    targetSha256,
+    services: ["nodedc-backend"],
+    transition: "telemetry-catalog-v1-to-execution-plan-materialization-v1",
+    mcpVersion: "0.9.0",
+    mcpSurface: "external-codex",
+    mcpTools: [
+      "engine_plan_l2_execution_plan_materialization",
+      "engine_apply_l2_execution_plan_materialization",
+    ],
+    providerLogicAuthority: "trusted-provider-package",
+    unmanagedGraphPolicy: "explicit-adoption-required",
+    nodeIntelligenceRelease: "2.33.2-974a9fb3492f",
+    predecessorGatewaySha256,
+    targetGatewaySha256,
+    predecessorNodeIntelligenceDescriptorSha256,
+    targetNodeIntelligenceDescriptorSha256,
+    untouched: [
+      "live L2 graphs",
+      "n8n workflow data",
+      "L1",
+      "Engine UI",
+      "node-intelligence image",
+      "databases",
+      "credentials",
+      "MCP Nginx",
+      "embedded AI Workspace",
+    ],
+  }, null, 2));
+} finally {
+  await rm(stage, { recursive: true, force: true });
+}
+
+async function assertExactSources() {
+  for (const [relativePath, expected] of Object.entries(targetSha256)) {
+    if (relativePath === nodeIntelligenceDescriptorPath) continue;
+    const sourcePath = join(engineRoot, relativePath);
+    const info = await lstat(sourcePath);
+    if (!info.isFile() || info.isSymbolicLink()) {
+      throw new Error(
+        `engine_mcp_execution_plan_materialization_source_unsafe:${relativePath}`,
+      );
+    }
+    const actual = digest(await readFile(sourcePath));
+    if (actual !== expected) {
+      throw new Error(
+        `engine_mcp_execution_plan_materialization_target_mismatch:${relativePath}:`
+        + `expected=${expected}:actual=${actual}`,
+      );
+    }
+  }
+
+  const gatewaySource = await readFile(
+    join(engineRoot, "nodedc-source/server/routes/engineAgentGateway.js"),
+    "utf8",
+  );
+  for (const marker of [
+    "const ENGINE_AGENT_MCP_VERSION = '0.9.0'",
+    "name: 'engine_plan_l2_execution_plan_materialization'",
+    "name: 'engine_apply_l2_execution_plan_materialization'",
+    "'execution-plan.apply'",
+  ]) {
+    if (!gatewaySource.includes(marker)) {
+      throw new Error(
+        `engine_mcp_execution_plan_materialization_gateway_marker_missing:${marker}`,
+      );
+    }
+  }
+  if (/gelios|robot2b/i.test(
+    await readFile(
+      join(engineRoot, "nodedc-source/server/l2ExecutionPlan/compiler.js"),
+      "utf8",
+    ),
+  )) {
+    throw new Error("engine_mcp_execution_plan_materialization_provider_hardcode");
+  }
+
+  const descriptor = JSON.parse(
+    await readFile(join(engineRoot, descriptorPath), "utf8"),
+  );
+  if (
+    descriptor?.schemaVersion !== "nodedc.engine.deploy-transition/v1"
+    || descriptor?.id !== "engine-mcp-l2-execution-plan-materialization-v1"
+    || descriptor?.mcpVersion !== "0.9.0"
+    || descriptor?.plan?.tool
+      !== "engine_plan_l2_execution_plan_materialization"
+    || descriptor?.apply?.tool
+      !== "engine_apply_l2_execution_plan_materialization"
+    || descriptor?.providerLogicAuthority !== "trusted-provider-package"
+    || descriptor?.unmanagedGraphPolicy !== "explicit-adoption-required"
+    || descriptor?.embeddedCodexChanged !== false
+  ) {
+    throw new Error(
+      "engine_mcp_execution_plan_materialization_descriptor_contract_mismatch",
+    );
+  }
+}
+
+async function buildTargetNodeIntelligenceDescriptor() {
+  const baselineBytes = await readFile(baselineArtifact);
+  if (digest(baselineBytes) !== baselineArtifactSha256) {
+    throw new Error(
+      "engine_mcp_execution_plan_materialization_baseline_artifact_mismatch",
+    );
+  }
+  const baseline = run("tar", [
+    "-xOf",
+    baselineArtifact,
+    `payload/${nodeIntelligenceDescriptorPath}`,
+  ]).stdout;
+  if (
+    digest(Buffer.from(baseline, "utf8"))
+    !== predecessorNodeIntelligenceDescriptorSha256
+  ) {
+    throw new Error(
+      "engine_mcp_execution_plan_materialization_baseline_descriptor_mismatch",
+    );
+  }
+  const descriptor = JSON.parse(baseline);
+  if (
+    descriptor?.schemaVersion
+      !== "nodedc.engine-node-intelligence-transition/v1"
+    || descriptor?.action !== "activate"
+    || descriptor?.releaseId !== "2.33.2-974a9fb3492f"
+    || descriptor?.source?.gatewaySha256 !== predecessorGatewaySha256
+  ) {
+    throw new Error(
+      "engine_mcp_execution_plan_materialization_baseline_contract_mismatch",
+    );
+  }
+  descriptor.source.gatewaySha256 = targetGatewaySha256;
+  const rendered = `${JSON.stringify(descriptor, null, 2)}\n`;
+  if (
+    digest(Buffer.from(rendered, "utf8"))
+    !== targetNodeIntelligenceDescriptorSha256
+  ) {
+    throw new Error(
+      "engine_mcp_execution_plan_materialization_target_descriptor_mismatch",
+    );
+  }
+  return rendered;
+}
+
+async function assertFresh(path) {
+  try {
+    await lstat(path);
+  } catch (error) {
+    if (error?.code === "ENOENT") return;
+    throw error;
+  }
+  throw new Error("artifact_already_exists");
+}
+
+function canonicalTarScript() {
+  return [
+    "import gzip,io,pathlib,sys,tarfile",
+    "root=pathlib.Path(sys.argv[2])",
+    "with open(sys.argv[1],'xb') as out:",
+    " with gzip.GzipFile(filename='',mode='wb',fileobj=out,compresslevel=9,mtime=0) as gz:",
+    "  with tarfile.open(fileobj=gz,mode='w',format=tarfile.PAX_FORMAT) as tar:",
+    "   for top in ('manifest.env','files.txt','payload'):",
+    "    p=root/top; paths=[p]+(sorted(p.rglob('*')) if p.is_dir() else [])",
+    "    for x in paths:",
+    "     info=tar.gettarinfo(str(x),arcname=x.relative_to(root).as_posix())",
+    "     info.uid=info.gid=0; info.uname=info.gname='root'; info.mtime=0; info.mode=0o755 if info.isdir() else 0o644",
+    "     with (open(x,'rb') if info.isfile() else io.BytesIO()) as src: tar.addfile(info,src if info.isfile() else None)",
+  ].join("\n");
+}
+
+function digest(value) {
+  return createHash("sha256").update(value).digest("hex");
+}
+
+function run(command, args) {
+  const result = spawnSync(command, args, {
+    encoding: "utf8",
+    maxBuffer: 128 * 1024 * 1024,
+    stdio: ["ignore", "pipe", "pipe"],
+  });
+  if (result.status !== 0) {
+    throw new Error(`${command}_failed:${result.stderr || result.stdout}`);
+  }
+  return result;
+}

infra/deploy-runner/nodedc-deploy

@@ -573,6 +573,45 @@ ENGINE_MCP_TELEMETRY_CATALOG_TARGET_SHA256 = {
 ENGINE_MCP_TELEMETRY_CATALOG_NEW_PATHS = (
     ENGINE_MCP_TELEMETRY_CATALOG_DESCRIPTOR_REL,
 )
+ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_DESCRIPTOR_REL = (
+    "nodedc-source/server/deployTransitions/executionPlanMaterializationV1.json"
+)
+ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_ARTIFACT_ENTRIES = (
+    "nodedc-source/server/routes/n8n.js",
+    "nodedc-source/server/routes/engineAgentGateway.js",
+    "nodedc-source/server/l2ExecutionPlan/catalog.js",
+    "nodedc-source/server/l2ExecutionPlan/compiler.js",
+    "nodedc-source/server/l2ExecutionPlan/materializer.js",
+    "nodedc-source/server/assets/execution-plans/v1/catalog.json",
+    ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_DESCRIPTOR_REL,
+    ENGINE_NODE_INTELLIGENCE_DESCRIPTOR_REL,
+)
+ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_PREDECESSOR_SHA256 = {
+    "nodedc-source/server/routes/n8n.js": "903245ae363e9b9ac161498f17988a38876a0e0ac8d80f3fa1b0112ceb7fe906",
+    "nodedc-source/server/routes/engineAgentGateway.js": "69bfc91e913a3fad04e13aca86efb9d62f73c0c7d1f8f7200907494b29fa9e8d",
+    ENGINE_NODE_INTELLIGENCE_DESCRIPTOR_REL: "25ed3efd858aaf82c242dba501f0acc0c6c3dc91e8845707a4d3325750eab59f",
+}
+ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_FOUNDATION_SHA256 = {
+    ENGINE_MCP_EXECUTION_PROFILE_DECODER_DESCRIPTOR_REL: "93e431902e9bcd3b828a82ed6b42b48d939051f21bf8824dafcf2addac8a711c",
+    ENGINE_MCP_TELEMETRY_CATALOG_DESCRIPTOR_REL: "b25ab8b6e6ad8ac24614c4630cc3635abe453464466d5a72238b05e48a24d882",
+}
+ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256 = {
+    "nodedc-source/server/routes/n8n.js": "391fc81228fdacd6efc6c0868991a3485f71869708e49ac15819db6ccce1bfce",
+    "nodedc-source/server/routes/engineAgentGateway.js": "9020cf49a3558c0497fed4ecfd81367cbc11b5b249881804c29fe437900c71f8",
+    "nodedc-source/server/l2ExecutionPlan/catalog.js": "c35b4c7ad9319aabbf1366a11ff52a6e99d961893bafdfcb4e84fc5f24fc04be",
+    "nodedc-source/server/l2ExecutionPlan/compiler.js": "beb3f664073f9a372432643936a04d0cb0028cd695f759c68bd053e9cd892fe4",
+    "nodedc-source/server/l2ExecutionPlan/materializer.js": "ee3bcfd06b3a5fa46800df974a2dedfdd55eeaf662329f837486c011a9bd713e",
+    "nodedc-source/server/assets/execution-plans/v1/catalog.json": "a153e040e0a592bad4375b98d9a1d83d148923aa0f0fd47d225b92eda281c4e9",
+    ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_DESCRIPTOR_REL: "52c0152cff49c251be5581a9209d2e63ba710c16e815bdd6ece24f7c9dd7e480",
+    ENGINE_NODE_INTELLIGENCE_DESCRIPTOR_REL: "03b2ba120c3929e9cf99940ddc927082de376ceff762895a84103144202aef42",
+}
+ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_NEW_PATHS = (
+    "nodedc-source/server/l2ExecutionPlan/catalog.js",
+    "nodedc-source/server/l2ExecutionPlan/compiler.js",
+    "nodedc-source/server/l2ExecutionPlan/materializer.js",
+    "nodedc-source/server/assets/execution-plans/v1/catalog.json",
+    ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_DESCRIPTOR_REL,
+)
 ENGINE_AGENT_FULL_GRANT_MIGRATION_ARTIFACT_ENTRIES = (
     ENGINE_AGENT_FULL_GRANT_MIGRATION_STORE_REL,
 )
@@ -3271,6 +3310,7 @@ def validate_engine_node_intelligence_transition(payload_dir, entries):
                 "const ENGINE_AGENT_MCP_VERSION = '0.6.0'",
                 "const ENGINE_AGENT_MCP_VERSION = '0.7.0'",
                 "const ENGINE_AGENT_MCP_VERSION = '0.8.0'",
+                "const ENGINE_AGENT_MCP_VERSION = '0.9.0'",
             )
         ):
             die("Engine node-intelligence gateway MCP version is not registered")
@@ -4422,6 +4462,50 @@ process.stdout.write('engine-mcp-telemetry-catalog:0.8.0:normalized-metadata-onl
     }
 
 
+def accept_engine_mcp_execution_plan_materialization_runtime():
+    root = component_root("engine")
+    validate_engine_mcp_execution_plan_materialization_slice(
+        root,
+        ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_ARTIFACT_ENTRIES,
+    )
+    live = run_engine_backend_probe(
+        (
+            "node",
+            "--input-type=module",
+            "-e",
+            """
+const fs=await import('node:fs/promises');
+const gateway=await import('file:///app/server/routes/engineAgentGateway.js');
+const catalogModule=await import('file:///app/server/l2ExecutionPlan/catalog.js');
+const materializer=await import('file:///app/server/l2ExecutionPlan/materializer.js');
+const catalog=await catalogModule.loadExecutionPlanCatalog();
+const plan=gateway.engineAgentTools.find((item)=>item.name==='engine_plan_l2_execution_plan_materialization');
+const apply=gateway.engineAgentTools.find((item)=>item.name==='engine_apply_l2_execution_plan_materialization');
+const planRequired=plan?.inputSchema?.required||[];
+const applyRequired=apply?.inputSchema?.required||[];
+const genericSource=(await Promise.all(['/app/server/l2ExecutionPlan/compiler.js','/app/server/l2ExecutionPlan/materializer.js'].map((path)=>fs.readFile(path,'utf8')))).join('\\n');
+const unmanaged=materializer.materializationState({source:{},nodes:[{id:'existing'}],edges:[]});
+if(gateway.ENGINE_AGENT_MCP_VERSION!=='0.9.0'||!plan||!apply||plan?.inputSchema?.additionalProperties!==false||apply?.inputSchema?.additionalProperties!==false||!planRequired.includes('executionPlan')||!applyRequired.includes('planRef')||!applyRequired.includes('providerAuthRef')||catalog.schemaVersion!=='nodedc.engine.execution-plan-catalog/v1'||catalog.runtime?.graphBlueprintSchemaVersion!=='nodedc.l2-graph-blueprint/v1'||catalog.runtime?.compilerVersions?.join(',')!=='1.1.0'||unmanaged!=='unmanaged_existing'||/gelios|robot2b/i.test(genericSource))process.exit(2);
+process.stdout.write('engine-mcp-execution-plan-materialization:0.9.0:provider-package-authority:two-phase:v1');
+""".strip(),
+        ),
+        "Engine MCP execution plan materialization",
+        container_id=engine_backend_container_id(),
+    )
+    expected = (
+        "engine-mcp-execution-plan-materialization:"
+        "0.9.0:provider-package-authority:two-phase:v1"
+    )
+    if live != expected:
+        die("Engine MCP execution plan materialization live acceptance mismatch")
+    return {
+        "target_sha256": dict(
+            ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256
+        ),
+        "live": live,
+    }
+
+
 def validate_no_lifecycle_scripts(payload_dir, label):
     forbidden = ("preinstall", "install", "postinstall", "prepare", "prepack", "postpack")
     for package_path in payload_dir.rglob("package.json"):
@@ -5178,6 +5262,135 @@ def validate_engine_mcp_telemetry_catalog_slice(payload_dir, entries):
         )
 
 
+def validate_engine_mcp_execution_plan_materialization_slice(payload_dir, entries):
+    if tuple(entries) != ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_ARTIFACT_ENTRIES:
+        die(
+            "Engine MCP execution plan materialization files.txt exact "
+            "set/order mismatch"
+        )
+    for rel, expected_sha256 in (
+        ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256.items()
+    ):
+        path = payload_dir / rel
+        try:
+            path_stat = path.lstat()
+        except FileNotFoundError:
+            die(f"Engine MCP execution plan materialization target is missing: {rel}")
+        if (
+            stat.S_ISLNK(path_stat.st_mode)
+            or not stat.S_ISREG(path_stat.st_mode)
+            or sha256_file(path) != expected_sha256
+        ):
+            die(
+                "Engine MCP execution plan materialization target sha256 "
+                f"mismatch: {rel}"
+            )
+    descriptor = read_strict_json(
+        payload_dir / ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_DESCRIPTOR_REL,
+        "Engine MCP execution plan materialization descriptor",
+        max_bytes=32 * 1024,
+    )
+    expected_descriptor = {
+        "schemaVersion": "nodedc.engine.deploy-transition/v1",
+        "id": "engine-mcp-l2-execution-plan-materialization-v1",
+        "component": "engine",
+        "scope": "external-mcp-l2-authoring",
+        "mcpVersion": "0.9.0",
+        "sourcePaths": [
+            "nodedc-source/server/routes/n8n.js",
+            "nodedc-source/server/routes/engineAgentGateway.js",
+            "nodedc-source/server/l2ExecutionPlan/catalog.js",
+            "nodedc-source/server/l2ExecutionPlan/compiler.js",
+            "nodedc-source/server/l2ExecutionPlan/materializer.js",
+            "nodedc-source/server/assets/execution-plans/v1/catalog.json",
+        ],
+        "plan": {
+            "tool": "engine_plan_l2_execution_plan_materialization",
+            "readOnly": True,
+            "returnsPlanRef": True,
+        },
+        "apply": {
+            "tool": "engine_apply_l2_execution_plan_materialization",
+            "accepts": [
+                "planRef",
+                "providerAuthRef",
+                "confirmation",
+                "changeRef",
+            ],
+            "rejectsCallerGraphOperations": True,
+            "revalidatesTargetRevisionAndScope": True,
+        },
+        "providerLogicAuthority": "trusted-provider-package",
+        "unmanagedGraphPolicy": "explicit-adoption-required",
+        "embeddedCodexChanged": False,
+    }
+    if descriptor != expected_descriptor:
+        die("Engine MCP execution plan materialization descriptor contract mismatch")
+    gateway_source = (
+        payload_dir / "nodedc-source/server/routes/engineAgentGateway.js"
+    ).read_text(encoding="utf-8")
+    if any(
+        marker not in gateway_source
+        for marker in (
+            "const ENGINE_AGENT_MCP_VERSION = '0.9.0'",
+            "name: 'engine_plan_l2_execution_plan_materialization'",
+            "name: 'engine_apply_l2_execution_plan_materialization'",
+            "'execution-plan.apply'",
+            "assertExactToolArguments(args, [",
+        )
+    ):
+        die("Engine MCP execution plan materialization gateway contract mismatch")
+    materializer_source = (
+        payload_dir / "nodedc-source/server/l2ExecutionPlan/materializer.js"
+    ).read_text(encoding="utf-8")
+    compiler_source = (
+        payload_dir / "nodedc-source/server/l2ExecutionPlan/compiler.js"
+    ).read_text(encoding="utf-8")
+    if any(
+        marker not in materializer_source
+        for marker in (
+            "status: 'adoption_required'",
+            "type: 'replaceGraph'",
+            "assignCredentialBindingInternal",
+            "execution_plan_materialization_equality_failed",
+        )
+    ):
+        die("Engine MCP execution plan materializer contract mismatch")
+    if any(
+        marker not in compiler_source
+        for marker in (
+            "compileExecutionPlanGraph",
+            "materializedGraphEqualityDigest",
+            "ndc.semantic-mapping",
+            "providerPackage.publisher.nodeType",
+        )
+    ):
+        die("Engine MCP execution plan compiler contract mismatch")
+    if re.search(r"gelios|robot2b", materializer_source, re.IGNORECASE) or re.search(
+        r"gelios|robot2b",
+        compiler_source,
+        re.IGNORECASE,
+    ):
+        die("Engine MCP execution plan runtime contains provider hardcode")
+    node_intelligence_descriptor = read_engine_node_intelligence_descriptor(
+        payload_dir / ENGINE_NODE_INTELLIGENCE_DESCRIPTOR_REL,
+        "Engine MCP execution plan materialization node-intelligence descriptor",
+    )
+    if (
+        node_intelligence_descriptor.get("action") != "activate"
+        or node_intelligence_descriptor.get("releaseId")
+        != ENGINE_NODE_INTELLIGENCE_RELEASE_ID
+        or node_intelligence_descriptor.get("source", {}).get("gatewaySha256")
+        != ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256[
+            ENGINE_NODE_INTELLIGENCE_GATEWAY_REL
+        ]
+    ):
+        die(
+            "Engine MCP execution plan materialization node-intelligence "
+            "attestation contract mismatch"
+        )
+
+
 def validate_engine_agent_full_grant_migration_slice(payload_dir, entries):
     if tuple(entries) != ENGINE_AGENT_FULL_GRANT_MIGRATION_ARTIFACT_ENTRIES:
         die("Engine agent full grant migration files.txt exact set/order mismatch")
@@ -5601,6 +5814,10 @@ def load_artifact(artifact, work_dir):
                 manifest["component"],
                 entries,
             )
+            and not is_engine_mcp_execution_plan_materialization_slice(
+                manifest["component"],
+                entries,
+            )
             and not is_engine_provider_authority_diagnostics_slice(
                 manifest["component"],
                 entries,
@@ -5634,6 +5851,14 @@ def load_artifact(artifact, work_dir):
             validate_engine_mcp_execution_profile_decoder_slice(payload_dir, entries)
         if is_engine_mcp_telemetry_catalog_slice(manifest["component"], entries):
             validate_engine_mcp_telemetry_catalog_slice(payload_dir, entries)
+        if is_engine_mcp_execution_plan_materialization_slice(
+            manifest["component"],
+            entries,
+        ):
+            validate_engine_mcp_execution_plan_materialization_slice(
+                payload_dir,
+                entries,
+            )
         if is_engine_provider_security_catalog_slice(manifest["component"], entries):
             validate_engine_provider_security_catalog_payload(payload_dir, entries)
         if touches_engine_credential_sink(manifest["component"], entries):
@@ -5655,6 +5880,10 @@ def load_artifact(artifact, work_dir):
                 manifest["component"],
                 entries,
             )
+            and not is_engine_mcp_execution_plan_materialization_slice(
+                manifest["component"],
+                entries,
+            )
             and (
                 touches_engine_data_product_publish_grant(entries)
                 or ENGINE_DATA_PRODUCT_PUBLISH_GRANT_OVERRIDE_REL in entries
@@ -5849,6 +6078,15 @@ def is_engine_mcp_telemetry_catalog_slice(component, entries):
     )
 
 
+def is_engine_mcp_execution_plan_materialization_slice(component, entries):
+    return (
+        component == "engine"
+        and entries is not None
+        and tuple(entries)
+        == ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_ARTIFACT_ENTRIES
+    )
+
+
 def is_engine_agent_full_grant_migration_slice(component, entries):
     return (
         component == "engine"
@@ -6377,6 +6615,80 @@ def preflight_engine_mcp_telemetry_catalog_predecessor():
     }
 
 
+def preflight_engine_mcp_execution_plan_materialization_predecessor():
+    root = component_root("engine")
+    actual = {}
+    for rel, expected_sha256 in (
+        ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_PREDECESSOR_SHA256.items()
+    ):
+        path = root / rel
+        try:
+            path_stat = path.lstat()
+        except FileNotFoundError:
+            die(
+                "Engine MCP execution plan materialization predecessor is "
+                f"missing: {rel}"
+            )
+        if stat.S_ISLNK(path_stat.st_mode) or not stat.S_ISREG(path_stat.st_mode):
+            die(
+                "Engine MCP execution plan materialization predecessor is "
+                f"unsafe: {rel}"
+            )
+        actual_sha256 = sha256_file(path)
+        if actual_sha256 != expected_sha256:
+            die(
+                "Engine MCP execution plan materialization predecessor drift "
+                f"detected: path={rel} expected={expected_sha256} "
+                f"actual={actual_sha256}"
+            )
+        actual[rel] = actual_sha256
+    foundation = {}
+    for rel, expected_sha256 in (
+        ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_FOUNDATION_SHA256.items()
+    ):
+        path = root / rel
+        try:
+            path_stat = path.lstat()
+        except FileNotFoundError:
+            die(
+                "Engine MCP execution plan materialization foundation is "
+                f"missing: {rel}"
+            )
+        if (
+            stat.S_ISLNK(path_stat.st_mode)
+            or not stat.S_ISREG(path_stat.st_mode)
+            or sha256_file(path) != expected_sha256
+        ):
+            die(
+                "Engine MCP execution plan materialization foundation drift "
+                f"detected: {rel}"
+            )
+        foundation[rel] = expected_sha256
+    for rel in ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_NEW_PATHS:
+        path = root / rel
+        if path.exists() or path.is_symlink():
+            die(
+                "Engine MCP execution plan materialization new path already "
+                f"exists: {rel}"
+            )
+    backend = preflight_engine_credential_backend_runtime()
+    if backend["mode"] != "verified-derived-retry":
+        die(
+            "Engine MCP execution plan materialization requires the active "
+            "immutable backend"
+        )
+    return {
+        "mode": "telemetry-catalog-v1-to-execution-plan-materialization-v1",
+        "predecessor_sha256": actual,
+        "foundation_sha256": foundation,
+        "target_sha256": dict(
+            ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256
+        ),
+        "new_paths": tuple(ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_NEW_PATHS),
+        "backend_mode": backend["mode"],
+    }
+
+
 def preflight_engine_agent_full_grant_migration_predecessor():
     root = component_root("engine")
     store_path = root / ENGINE_AGENT_FULL_GRANT_MIGRATION_STORE_REL
@@ -6432,6 +6744,7 @@ def component_services(component, entries=None):
         or is_engine_provider_target_host_policy_slice(component, entries)
         or is_engine_mcp_execution_profile_decoder_slice(component, entries)
         or is_engine_mcp_telemetry_catalog_slice(component, entries)
+        or is_engine_mcp_execution_plan_materialization_slice(component, entries)
         or is_engine_provider_security_catalog_slice(component, entries)
     ):
         # This slice updates only the existing Engine backend control plane.
@@ -8642,6 +8955,7 @@ def plan_artifact(artifact):
     provider_target_host_policy_preflight = None
     mcp_execution_profile_decoder_preflight = None
     mcp_telemetry_catalog_preflight = None
+    mcp_execution_plan_materialization_preflight = None
     provider_catalog_preflight = None
     with tempfile.TemporaryDirectory(prefix="plan-", dir=TMP_DIR) as tmp:
         manifest, entries, payload_dir = load_artifact(artifact, Path(tmp))
@@ -8707,6 +9021,13 @@ def plan_artifact(artifact):
             mcp_telemetry_catalog_preflight = (
                 preflight_engine_mcp_telemetry_catalog_predecessor()
             )
+        if is_engine_mcp_execution_plan_materialization_slice(
+            manifest["component"],
+            entries,
+        ):
+            mcp_execution_plan_materialization_preflight = (
+                preflight_engine_mcp_execution_plan_materialization_predecessor()
+            )
         if is_engine_provider_security_catalog_slice(manifest["component"], entries):
             provider_catalog_preflight = preflight_engine_provider_security_catalog_predecessor()
 
@@ -8749,6 +9070,12 @@ def plan_artifact(artifact):
         component,
         entries,
     )
+    touches_mcp_execution_plan_materialization = (
+        is_engine_mcp_execution_plan_materialization_slice(
+            component,
+            entries,
+        )
+    )
     touches_agent_grant_migration = is_engine_agent_full_grant_migration_slice(
         component,
         entries,
@@ -8766,6 +9093,7 @@ def plan_artifact(artifact):
         or touches_provider_target_host_policy
         or touches_mcp_execution_profile_decoder
         or touches_mcp_telemetry_catalog
+        or touches_mcp_execution_plan_materialization
         or touches_agent_grant_migration
     ):
         credential_backend_preflight = preflight_engine_credential_backend_runtime()
@@ -8816,6 +9144,14 @@ def plan_artifact(artifact):
                 "Engine MCP telemetry catalog requires the active immutable "
                 "credential backend"
             )
+    if touches_mcp_execution_plan_materialization:
+        if mcp_execution_plan_materialization_preflight is None:
+            die("Engine MCP execution plan materialization preflight is missing")
+        if credential_backend_preflight["mode"] != "verified-derived-retry":
+            die(
+                "Engine MCP execution plan materialization requires the active "
+                "immutable credential backend"
+            )
     if touches_agent_grant_migration:
         agent_grant_migration_predecessor_sha256 = (
             preflight_engine_agent_full_grant_migration_predecessor()
@@ -9182,6 +9518,82 @@ def plan_artifact(artifact):
         print("engine_databases=untouched")
         print("mcp_nginx=untouched")
         print("embedded_ai_workspace=untouched")
+    if mcp_execution_plan_materialization_preflight:
+        print(
+            "engine_mcp_authoring_transition="
+            f"{mcp_execution_plan_materialization_preflight['mode']}"
+        )
+        print("engine_mcp_version=0.9.0")
+        print("engine_mcp_surface=external-codex")
+        print(
+            "engine_mcp_tool="
+            "engine_plan_l2_execution_plan_materialization"
+        )
+        print(
+            "engine_mcp_tool="
+            "engine_apply_l2_execution_plan_materialization"
+        )
+        print("engine_mcp_provider_logic_authority=trusted-provider-package")
+        print("engine_mcp_unmanaged_graph_policy=explicit-adoption-required")
+        print("engine_mcp_plan_phase=read-only")
+        print("engine_mcp_apply_phase=opaque-plan-ref-only")
+        print("node_intelligence_descriptor=attested-gateway-successor")
+        print("node_intelligence_release=2.33.2-974a9fb3492f")
+        print("node_intelligence_image=preserved")
+        for foundation_path, foundation_sha256 in (
+            mcp_execution_plan_materialization_preflight[
+                "foundation_sha256"
+            ].items()
+        ):
+            print(
+                "engine_mcp_execution_plan_materialization_foundation_sha256"
+                f"[{foundation_path}]={foundation_sha256}"
+            )
+        for changed_path in (
+            ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_ARTIFACT_ENTRIES
+        ):
+            print(
+                "engine_mcp_execution_plan_materialization_changed_path="
+                f"{changed_path}"
+            )
+            if changed_path in mcp_execution_plan_materialization_preflight[
+                "predecessor_sha256"
+            ]:
+                print(
+                    "engine_mcp_execution_plan_materialization_predecessor_sha256"
+                    f"[{changed_path}]="
+                    f"{mcp_execution_plan_materialization_preflight['predecessor_sha256'][changed_path]}"
+                )
+            elif changed_path in mcp_execution_plan_materialization_preflight[
+                "new_paths"
+            ]:
+                print(
+                    "engine_mcp_execution_plan_materialization_predecessor_state"
+                    f"[{changed_path}]=absent"
+                )
+            else:
+                die(
+                    "Engine MCP execution plan materialization plan has no "
+                    f"predecessor state: {changed_path}"
+                )
+            print(
+                "engine_mcp_execution_plan_materialization_target_sha256"
+                f"[{changed_path}]="
+                f"{mcp_execution_plan_materialization_preflight['target_sha256'][changed_path]}"
+            )
+        print(
+            "backend_current_barrier="
+            f"{mcp_execution_plan_materialization_preflight['backend_mode']}"
+        )
+        print("backend_force_recreate=yes")
+        print("backend_pull=never")
+        print("l2_graph=untouched")
+        print("n8n_l1=untouched")
+        print("engine_ui=untouched")
+        print("engine_databases=untouched")
+        print("credentials=preserved")
+        print("mcp_nginx=untouched")
+        print("embedded_ai_workspace=untouched")
     if transition_descriptor:
         print(f"n8n_transition={transition_descriptor['action']}")
         print(f"n8n_version={transition_descriptor['n8nVersion']}")
@@ -10300,6 +10712,10 @@ def component_healthchecks(component, entries=None, services=None):
             or is_engine_provider_target_host_policy_slice(component, entries)
             or is_engine_mcp_execution_profile_decoder_slice(component, entries)
             or is_engine_mcp_telemetry_catalog_slice(component, entries)
+            or is_engine_mcp_execution_plan_materialization_slice(
+                component,
+                entries,
+            )
             or is_engine_agent_full_grant_migration_slice(component, entries)
             or is_engine_mcp_control_plane_slice(component, entries)
             or is_engine_mcp_ontology_sdk_slice(component, entries)
@@ -10717,6 +11133,12 @@ def run_healthchecks(component, entries=None, services=None):
         component,
         entries,
     )
+    touches_mcp_execution_plan_materialization = (
+        is_engine_mcp_execution_plan_materialization_slice(
+            component,
+            entries,
+        )
+    )
     touches_agent_grant_migration = is_engine_agent_full_grant_migration_slice(
         component,
         entries,
@@ -10735,6 +11157,7 @@ def run_healthchecks(component, entries=None, services=None):
         or touches_provider_target_host_policy
         or touches_mcp_execution_profile_decoder
         or touches_mcp_telemetry_catalog
+        or touches_mcp_execution_plan_materialization
         or touches_agent_grant_migration
         or touches_mcp_control_plane
         or touches_mcp_ontology_sdk
@@ -10757,6 +11180,7 @@ def run_healthchecks(component, entries=None, services=None):
         or touches_provider_target_host_policy
         or touches_mcp_execution_profile_decoder
         or touches_mcp_telemetry_catalog
+        or touches_mcp_execution_plan_materialization
         or touches_agent_grant_migration
         or touches_mcp_control_plane
         or touches_mcp_ontology_sdk
@@ -10902,6 +11326,48 @@ def run_healthchecks(component, entries=None, services=None):
                 "Engine MCP telemetry catalog installed state is neither target "
                 "nor rollback predecessor"
             )
+    if touches_mcp_execution_plan_materialization:
+        root = component_root("engine")
+        target_state = all(
+            (root / rel).is_file()
+            and not (root / rel).is_symlink()
+            and sha256_file(root / rel) == expected
+            for rel, expected in (
+                ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256.items()
+            )
+        ) and all(
+            (root / rel).is_file()
+            and not (root / rel).is_symlink()
+            and sha256_file(root / rel) == expected
+            for rel, expected in (
+                ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_FOUNDATION_SHA256.items()
+            )
+        )
+        predecessor_state = all(
+            (root / rel).is_file()
+            and not (root / rel).is_symlink()
+            and sha256_file(root / rel) == expected
+            for rel, expected in (
+                ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_PREDECESSOR_SHA256.items()
+            )
+        ) and all(
+            (root / rel).is_file()
+            and not (root / rel).is_symlink()
+            and sha256_file(root / rel) == expected
+            for rel, expected in (
+                ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_FOUNDATION_SHA256.items()
+            )
+        ) and all(
+            not (root / rel).exists() and not (root / rel).is_symlink()
+            for rel in ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_NEW_PATHS
+        )
+        if target_state:
+            accept_engine_mcp_execution_plan_materialization_runtime()
+        elif not predecessor_state:
+            die(
+                "Engine MCP execution plan materialization installed state is "
+                "neither target nor rollback predecessor"
+            )
     container_name = COMPONENTS[component].get("health_container")
     if container_name:
         healthcheck_container(container_name)
@@ -11019,6 +11485,22 @@ def apply_artifact(artifact):
                             "Engine MCP telemetry catalog requires the active "
                             "immutable credential backend"
                         )
+                if is_engine_mcp_execution_plan_materialization_slice(
+                    component,
+                    entries,
+                ):
+                    preflight_engine_mcp_execution_plan_materialization_predecessor()
+                    execution_plan_materialization_backend_preflight = (
+                        preflight_engine_credential_backend_runtime()
+                    )
+                    if (
+                        execution_plan_materialization_backend_preflight["mode"]
+                        != "verified-derived-retry"
+                    ):
+                        die(
+                            "Engine MCP execution plan materialization requires "
+                            "the active immutable credential backend"
+                        )
                 if is_engine_agent_full_grant_migration_slice(component, entries):
                     preflight_engine_agent_full_grant_migration_predecessor()
                     migration_backend_preflight = preflight_engine_credential_backend_runtime()
@@ -11276,6 +11758,10 @@ def apply_artifact(artifact):
                             entries,
                         )
                         or is_engine_mcp_telemetry_catalog_slice(component, entries)
+                        or is_engine_mcp_execution_plan_materialization_slice(
+                            component,
+                            entries,
+                        )
                         or is_engine_agent_full_grant_migration_slice(component, entries)
                         or is_engine_mcp_control_plane_slice(component, entries)
                         or is_engine_mcp_ontology_sdk_slice(component, entries)

infra/deploy-runner/test_engine_mcp_execution_plan_materialization.py

@@ -0,0 +1,356 @@
+import hashlib
+import importlib.machinery
+import importlib.util
+import io
+import json
+import os
+from pathlib import Path
+import subprocess
+import tarfile
+import tempfile
+import unittest
+from contextlib import redirect_stdout
+from unittest import mock
+
+
+SCRIPT_DIR = Path(__file__).resolve().parent
+RUNNER_PATH = SCRIPT_DIR / "nodedc-deploy"
+BUILDER_PATH = (
+    SCRIPT_DIR / "build-engine-mcp-execution-plan-materialization-artifact.mjs"
+)
+ENGINE_ROOT = SCRIPT_DIR.parent.parent.parent / "NODEDC_ENGINE_INFRA"
+PATCH_ID = "engine-mcp-execution-plan-materialization-20991231-999"
+
+
+def load_runner():
+    loader = importlib.machinery.SourceFileLoader(
+        "nodedc_engine_mcp_execution_plan_materialization",
+        str(RUNNER_PATH),
+    )
+    spec = importlib.util.spec_from_loader(loader.name, loader)
+    module = importlib.util.module_from_spec(spec)
+    loader.exec_module(module)
+    return module
+
+
+RUNNER = load_runner()
+
+
+class EngineMcpExecutionPlanMaterializationTest(unittest.TestCase):
+    def require_current_target_source(self):
+        for relative_path, expected in (
+            RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256.items()
+        ):
+            if relative_path == RUNNER.ENGINE_NODE_INTELLIGENCE_DESCRIPTOR_REL:
+                continue
+            path = ENGINE_ROOT / relative_path
+            if (
+                not path.is_file()
+                or hashlib.sha256(path.read_bytes()).hexdigest() != expected
+            ):
+                self.skipTest(
+                    "execution plan materialization source has advanced"
+                )
+
+    def build(self, artifact_dir):
+        environment = os.environ.copy()
+        environment["NODEDC_ENGINE_SOURCE_ROOT"] = str(ENGINE_ROOT)
+        environment["NODEDC_DEPLOY_ARTIFACT_DIR"] = str(artifact_dir)
+        completed = subprocess.run(
+            ["node", str(BUILDER_PATH), PATCH_ID],
+            check=True,
+            capture_output=True,
+            text=True,
+            env=environment,
+        )
+        return json.loads(completed.stdout)
+
+    def test_builder_emits_exact_deterministic_backend_only_slice(self):
+        self.require_current_target_source()
+        with tempfile.TemporaryDirectory(
+            prefix="nodedc-engine-mcp-execution-plan-materialization-"
+        ) as directory:
+            root = Path(directory)
+            first = self.build(root / "first")
+            second = self.build(root / "second")
+            first_artifact = Path(first["artifact"])
+            second_artifact = Path(second["artifact"])
+            self.assertEqual(first_artifact.read_bytes(), second_artifact.read_bytes())
+            self.assertEqual(first["services"], ["nodedc-backend"])
+            self.assertEqual(first["mcpVersion"], "0.9.0")
+            self.assertEqual(
+                first["providerLogicAuthority"],
+                "trusted-provider-package",
+            )
+            self.assertEqual(
+                first["unmanagedGraphPolicy"],
+                "explicit-adoption-required",
+            )
+            self.assertEqual(
+                tuple(first["entries"]),
+                RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_ARTIFACT_ENTRIES,
+            )
+
+            extract = root / "extract"
+            with tarfile.open(first_artifact, "r:gz") as archive:
+                archive.extractall(extract, filter="data")
+            entries = tuple(
+                (extract / "files.txt").read_text(encoding="utf-8").splitlines()
+            )
+            payload = extract / "payload"
+            self.assertTrue(
+                RUNNER.is_engine_mcp_execution_plan_materialization_slice(
+                    "engine",
+                    entries,
+                )
+            )
+            self.assertFalse(
+                RUNNER.is_engine_mcp_telemetry_catalog_slice("engine", entries)
+            )
+            self.assertEqual(
+                RUNNER.component_services("engine", entries),
+                ("nodedc-backend",),
+            )
+            RUNNER.validate_engine_mcp_execution_plan_materialization_slice(
+                payload,
+                entries,
+            )
+            node_intelligence_descriptor = json.loads(
+                (
+                    payload / RUNNER.ENGINE_NODE_INTELLIGENCE_DESCRIPTOR_REL
+                ).read_text(encoding="utf-8")
+            )
+            self.assertEqual(
+                node_intelligence_descriptor["source"]["gatewaySha256"],
+                RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256[
+                    RUNNER.ENGINE_NODE_INTELLIGENCE_GATEWAY_REL
+                ],
+            )
+            with tempfile.TemporaryDirectory(
+                prefix="nodedc-engine-mcp-execution-plan-load-"
+            ) as load_directory:
+                loaded = RUNNER.load_artifact(
+                    first_artifact,
+                    Path(load_directory),
+                )
+            self.assertEqual(tuple(loaded[1]), entries)
+
+    def test_preflight_requires_035_foundation_and_absent_new_paths(self):
+        with tempfile.TemporaryDirectory(
+            prefix="nodedc-engine-mcp-execution-plan-preflight-"
+        ) as directory:
+            root = Path(directory)
+            hashes = {}
+            for mapping in (
+                RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_PREDECESSOR_SHA256,
+                RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_FOUNDATION_SHA256,
+            ):
+                for relative_path, expected in mapping.items():
+                    path = root / relative_path
+                    path.parent.mkdir(parents=True, exist_ok=True)
+                    path.write_text("installed\n", encoding="utf-8")
+                    hashes[path] = expected
+            with (
+                mock.patch.object(RUNNER, "component_root", return_value=root),
+                mock.patch.object(
+                    RUNNER,
+                    "sha256_file",
+                    side_effect=lambda path: hashes[Path(path)],
+                ),
+                mock.patch.object(
+                    RUNNER,
+                    "preflight_engine_credential_backend_runtime",
+                    return_value={"mode": "verified-derived-retry"},
+                ),
+            ):
+                result = (
+                    RUNNER
+                    .preflight_engine_mcp_execution_plan_materialization_predecessor()
+                )
+            self.assertEqual(
+                result["mode"],
+                "telemetry-catalog-v1-to-execution-plan-materialization-v1",
+            )
+            self.assertEqual(
+                result["foundation_sha256"],
+                RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_FOUNDATION_SHA256,
+            )
+
+            new_path = (
+                root
+                / RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_NEW_PATHS[0]
+            )
+            new_path.parent.mkdir(parents=True, exist_ok=True)
+            new_path.write_text("{}\n", encoding="utf-8")
+            with (
+                mock.patch.object(RUNNER, "component_root", return_value=root),
+                mock.patch.object(
+                    RUNNER,
+                    "sha256_file",
+                    side_effect=lambda path: hashes[Path(path)],
+                ),
+            ):
+                with self.assertRaises(RUNNER.DeployError):
+                    (
+                        RUNNER
+                        .preflight_engine_mcp_execution_plan_materialization_predecessor()
+                    )
+
+    def test_plan_renders_external_two_phase_boundary(self):
+        self.require_current_target_source()
+        with tempfile.TemporaryDirectory(
+            prefix="nodedc-engine-mcp-execution-plan-plan-"
+        ) as directory:
+            root = Path(directory)
+            artifact = Path(self.build(root / "artifacts")["artifact"])
+            live_root = root / "live"
+            live_root.mkdir()
+            preflight = {
+                "mode": "telemetry-catalog-v1-to-execution-plan-materialization-v1",
+                "predecessor_sha256": dict(
+                    RUNNER
+                    .ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_PREDECESSOR_SHA256
+                ),
+                "foundation_sha256": dict(
+                    RUNNER
+                    .ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_FOUNDATION_SHA256
+                ),
+                "target_sha256": dict(
+                    RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256
+                ),
+                "new_paths": tuple(
+                    RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_NEW_PATHS
+                ),
+                "backend_mode": "verified-derived-retry",
+            }
+            output = io.StringIO()
+            with (
+                mock.patch.object(RUNNER, "validate_artifact_location"),
+                mock.patch.object(RUNNER, "ensure_layout"),
+                mock.patch.object(RUNNER, "TMP_DIR", root),
+                mock.patch.object(RUNNER, "component_root", return_value=live_root),
+                mock.patch.object(
+                    RUNNER,
+                    "component_compose_root",
+                    return_value=live_root,
+                ),
+                mock.patch.object(
+                    RUNNER,
+                    "preflight_engine_mcp_execution_plan_materialization_predecessor",
+                    return_value=preflight,
+                ),
+                mock.patch.object(
+                    RUNNER,
+                    "preflight_engine_credential_backend_runtime",
+                    return_value={"mode": "verified-derived-retry"},
+                ),
+                mock.patch.object(RUNNER, "state_has_sha", return_value=False),
+                mock.patch.object(RUNNER, "state_has_patch_id", return_value=False),
+                redirect_stdout(output),
+            ):
+                RUNNER.plan_artifact(artifact)
+            plan = output.getvalue()
+            self.assertIn("services=nodedc-backend", plan)
+            self.assertIn("engine_mcp_version=0.9.0", plan)
+            self.assertIn("engine_mcp_surface=external-codex", plan)
+            self.assertIn(
+                "engine_mcp_provider_logic_authority=trusted-provider-package",
+                plan,
+            )
+            self.assertIn(
+                "engine_mcp_unmanaged_graph_policy=explicit-adoption-required",
+                plan,
+            )
+            self.assertIn("engine_mcp_plan_phase=read-only", plan)
+            self.assertIn("engine_mcp_apply_phase=opaque-plan-ref-only", plan)
+            self.assertIn("l2_graph=untouched", plan)
+            self.assertIn("embedded_ai_workspace=untouched", plan)
+            self.assertIn("state=new", plan)
+
+    def test_healthchecks_dispatch_materialization_acceptance(self):
+        entries = (
+            RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_ARTIFACT_ENTRIES
+        )
+        with tempfile.TemporaryDirectory(
+            prefix="nodedc-engine-mcp-execution-plan-health-"
+        ) as directory:
+            root = Path(directory)
+            all_hashes = {
+                **RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_TARGET_SHA256,
+                **RUNNER.ENGINE_MCP_EXECUTION_PLAN_MATERIALIZATION_FOUNDATION_SHA256,
+            }
+            for relative_path in all_hashes:
+                path = root / relative_path
+                path.parent.mkdir(parents=True, exist_ok=True)
+                path.write_text("target\n", encoding="utf-8")
+
+            def target_hash(path):
+                relative_path = Path(path).relative_to(root).as_posix()
+                return all_hashes[relative_path]
+
+            with (
+                mock.patch.object(RUNNER, "component_root", return_value=root),
+                mock.patch.object(RUNNER, "sha256_file", side_effect=target_hash),
+                mock.patch.object(RUNNER, "healthcheck_compose_service"),
+                mock.patch.object(RUNNER, "component_healthchecks", return_value=()),
+                mock.patch.object(
+                    RUNNER,
+                    "preflight_engine_credential_backend_runtime",
+                    return_value={"mode": "verified-derived-retry"},
+                ),
+                mock.patch.object(
+                    RUNNER,
+                    "accept_engine_mcp_execution_plan_materialization_runtime",
+                    return_value={"live": "accepted"},
+                ) as acceptance,
+                mock.patch.object(RUNNER, "healthcheck_container"),
+            ):
+                RUNNER.run_healthchecks(
+                    "engine",
+                    entries,
+                    ("nodedc-backend",),
+                )
+            acceptance.assert_called_once_with()
+
+    def test_live_acceptance_probes_provider_neutral_two_phase_contract(self):
+        expected_live = (
+            "engine-mcp-execution-plan-materialization:"
+            "0.9.0:provider-package-authority:two-phase:v1"
+        )
+        with (
+            mock.patch.object(RUNNER, "component_root", return_value=ENGINE_ROOT),
+            mock.patch.object(
+                RUNNER,
+                "validate_engine_mcp_execution_plan_materialization_slice",
+            ),
+            mock.patch.object(
+                RUNNER,
+                "engine_backend_container_id",
+                return_value="backend",
+            ),
+            mock.patch.object(
+                RUNNER,
+                "run_engine_backend_probe",
+                return_value=expected_live,
+            ) as backend_probe,
+        ):
+            result = (
+                RUNNER
+                .accept_engine_mcp_execution_plan_materialization_runtime()
+            )
+        self.assertEqual(result["live"], expected_live)
+        self.assertEqual(
+            backend_probe.call_args.args[1],
+            "Engine MCP execution plan materialization",
+        )
+        probe_source = backend_probe.call_args.args[0][-1]
+        self.assertIn(
+            "engine_plan_l2_execution_plan_materialization",
+            probe_source,
+        )
+        self.assertIn("unmanaged_existing", probe_source)
+        self.assertIn("additionalProperties!==false", probe_source)
+
+
+if __name__ == "__main__":
+    unittest.main(verbosity=2)

infra/deploy-runner/test_engine_node_intelligence.py

@@ -147,15 +147,15 @@ class EngineNodeIntelligenceTest(unittest.TestCase):
             )
             self.assertEqual(actual, descriptor)
 
-    def test_gateway_accepts_registered_0_8_and_rejects_unknown_successors(self):
+    def test_gateway_accepts_registered_0_9_and_rejects_unknown_successors(self):
         with tempfile.TemporaryDirectory() as directory:
             payload, descriptor = self.make_activation_payload(Path(directory))
             gateway = payload / RUNNER.ENGINE_NODE_INTELLIGENCE_GATEWAY_REL
             gateway_text = gateway.read_text(encoding="utf-8")
-            self.assertIn("const ENGINE_AGENT_MCP_VERSION = '0.8.0'", gateway_text)
+            self.assertIn("const ENGINE_AGENT_MCP_VERSION = '0.9.0'", gateway_text)
             gateway.write_text(
                 gateway_text.replace(
-                    "const ENGINE_AGENT_MCP_VERSION = '0.8.0'",
+                    "const ENGINE_AGENT_MCP_VERSION = '0.9.0'",
                     "const ENGINE_AGENT_MCP_VERSION = '9.9.9'",
                 ),
                 encoding="utf-8",