diff --git a/docs/eve-migration-roadmap.md b/docs/eve-migration-roadmap.md
index 85f0936..77e31b0 100644
--- a/docs/eve-migration-roadmap.md
+++ b/docs/eve-migration-roadmap.md
@@ -423,6 +423,13 @@ Recently cut:
   so runtime owner repos can consume split target, move set, contract input,
   forbidden import, and external proof shape without trusting only ad hoc smoke
   script checks.
+- Plugin, provider, and conformance handoff documents are now schema-backed as
+  `gamecult.eve.plugin_handoff.v1`, `gamecult.eve.provider_handoff.v1`, and
+  `gamecult.eve.conformance_handoff.v1`. The parity runner validates the
+  documents, exports the schema catalog entries, and owner-consumer smokes now
+  demand those contracts explicitly, so Sai, Norn, EvePlugins, Aetheria, and
+  EveConformance can consume handoff shape without depending on Eve's local
+  smoke script folklore.
 - EveElectron now has a pending split target and handoff at
   `runtimes/incubating/eve-electron/eveelectron-split-handoff.json`. It does
   claim a provider-agnostic Electron shell surface-tree projection and command
diff --git a/docs/parity-testing-harness.md b/docs/parity-testing-harness.md
index 25a4c8f..99c230f 100644
--- a/docs/parity-testing-harness.md
+++ b/docs/parity-testing-harness.md
@@ -220,6 +220,10 @@ Runtime split handoff documents themselves use
 `gamecult.eve.runtime_split_handoff.v1`; the parity runner validates the
 handoff document shape and exports any `splitHandoffErrors` on the runtime
 record.
+Plugin, provider, and EveConformance handoff documents are also schema-backed:
+`gamecult.eve.plugin_handoff.v1`, `gamecult.eve.provider_handoff.v1`, and
+`gamecult.eve.conformance_handoff.v1` are exported through the schema catalog.
+Owner consumer smokes assert those schemas before trusting handoff paths.
 
 After generating the parity report, `run-parity-harness.ps1` copies
 `artifacts/conformance/latest` into
diff --git a/schemas/gamecult.eve.conformance_handoff.v1.schema.json b/schemas/gamecult.eve.conformance_handoff.v1.schema.json
new file mode 100644
index 0000000..ed6f306
--- /dev/null
+++ b/schemas/gamecult.eve.conformance_handoff.v1.schema.json
@@ -0,0 +1,98 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "gamecult.eve.conformance_handoff.v1",
+  "title": "Eve Conformance Handoff",
+  "type": "object",
+  "required": [
+    "schema",
+    "splitTarget",
+    "ownerRepo",
+    "currentHostRepo",
+    "authorityBoundary",
+    "moveSets",
+    "contractInputs",
+    "forbiddenImports",
+    "requiredExternalProofs"
+  ],
+  "properties": {
+    "schema": {
+      "const": "gamecult.eve.conformance_handoff.v1"
+    },
+    "splitTarget": {
+      "type": "string",
+      "minLength": 1
+    },
+    "ownerRepo": {
+      "type": "string",
+      "minLength": 1
+    },
+    "currentHostRepo": {
+      "type": "string",
+      "minLength": 1
+    },
+    "authorityBoundary": {
+      "type": "string",
+      "minLength": 1
+    },
+    "moveSets": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": [
+          "id",
+          "destinationOwner",
+          "currentPaths",
+          "replacementProof"
+        ],
+        "properties": {
+          "id": {
+            "type": "string",
+            "minLength": 1
+          },
+          "destinationOwner": {
+            "type": "string",
+            "minLength": 1
+          },
+          "currentPaths": {
+            "type": "array",
+            "items": {
+              "type": "string",
+              "minLength": 1
+            }
+          },
+          "replacementProof": {
+            "type": "string",
+            "minLength": 1
+          }
+        },
+        "additionalProperties": true
+      }
+    },
+    "contractInputs": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "forbiddenImports": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "requiredExternalProofs": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    }
+  },
+  "additionalProperties": true
+}
diff --git a/schemas/gamecult.eve.plugin_handoff.v1.schema.json b/schemas/gamecult.eve.plugin_handoff.v1.schema.json
new file mode 100644
index 0000000..1da016d
--- /dev/null
+++ b/schemas/gamecult.eve.plugin_handoff.v1.schema.json
@@ -0,0 +1,118 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "gamecult.eve.plugin_handoff.v1",
+  "title": "Eve Plugin Handoff",
+  "type": "object",
+  "required": [
+    "schema",
+    "pluginId",
+    "ownerRepo",
+    "currentHostRepo",
+    "splitTarget",
+    "manifestPath",
+    "advertisementPath",
+    "abiFixturePath",
+    "authorityBoundary",
+    "moveSets",
+    "contractInputs",
+    "forbiddenImports",
+    "requiredExternalProofs"
+  ],
+  "properties": {
+    "schema": {
+      "const": "gamecult.eve.plugin_handoff.v1"
+    },
+    "pluginId": {
+      "type": "string",
+      "minLength": 1
+    },
+    "ownerRepo": {
+      "type": "string",
+      "minLength": 1
+    },
+    "currentHostRepo": {
+      "type": "string",
+      "minLength": 1
+    },
+    "splitTarget": {
+      "type": "string",
+      "minLength": 1
+    },
+    "manifestPath": {
+      "type": "string",
+      "minLength": 1
+    },
+    "advertisementPath": {
+      "type": "string",
+      "minLength": 1
+    },
+    "abiFixturePath": {
+      "type": "string",
+      "minLength": 1
+    },
+    "authorityBoundary": {
+      "type": "string",
+      "minLength": 1
+    },
+    "moveSets": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": [
+          "id",
+          "destinationOwner",
+          "currentPaths",
+          "replacementProof"
+        ],
+        "properties": {
+          "id": {
+            "type": "string",
+            "minLength": 1
+          },
+          "destinationOwner": {
+            "type": "string",
+            "minLength": 1
+          },
+          "currentPaths": {
+            "type": "array",
+            "items": {
+              "type": "string",
+              "minLength": 1
+            }
+          },
+          "replacementProof": {
+            "type": "string",
+            "minLength": 1
+          }
+        },
+        "additionalProperties": true
+      }
+    },
+    "contractInputs": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "forbiddenImports": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "requiredExternalProofs": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    }
+  },
+  "additionalProperties": true
+}
diff --git a/schemas/gamecult.eve.provider_handoff.v1.schema.json b/schemas/gamecult.eve.provider_handoff.v1.schema.json
new file mode 100644
index 0000000..a78400c
--- /dev/null
+++ b/schemas/gamecult.eve.provider_handoff.v1.schema.json
@@ -0,0 +1,117 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "gamecult.eve.provider_handoff.v1",
+  "title": "Eve Provider Handoff",
+  "type": "object",
+  "required": [
+    "schema",
+    "providerId",
+    "ownerRepo",
+    "currentHostRepo",
+    "advertisementPath",
+    "scenarioPath",
+    "fixtureIds",
+    "authorityBoundary",
+    "moveSets",
+    "contractInputs",
+    "forbiddenImports",
+    "requiredExternalProofs"
+  ],
+  "properties": {
+    "schema": {
+      "const": "gamecult.eve.provider_handoff.v1"
+    },
+    "providerId": {
+      "type": "string",
+      "minLength": 1
+    },
+    "ownerRepo": {
+      "type": "string",
+      "minLength": 1
+    },
+    "currentHostRepo": {
+      "type": "string",
+      "minLength": 1
+    },
+    "advertisementPath": {
+      "type": "string",
+      "minLength": 1
+    },
+    "scenarioPath": {
+      "type": "string",
+      "minLength": 1
+    },
+    "fixtureIds": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "authorityBoundary": {
+      "type": "string",
+      "minLength": 1
+    },
+    "moveSets": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": [
+          "id",
+          "destinationOwner",
+          "currentPaths",
+          "replacementProof"
+        ],
+        "properties": {
+          "id": {
+            "type": "string",
+            "minLength": 1
+          },
+          "destinationOwner": {
+            "type": "string",
+            "minLength": 1
+          },
+          "currentPaths": {
+            "type": "array",
+            "items": {
+              "type": "string",
+              "minLength": 1
+            }
+          },
+          "replacementProof": {
+            "type": "string",
+            "minLength": 1
+          }
+        },
+        "additionalProperties": true
+      }
+    },
+    "contractInputs": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "forbiddenImports": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "requiredExternalProofs": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    }
+  },
+  "additionalProperties": true
+}
diff --git a/scripts/run-aetheria-conformance-consumer-smoke.ps1 b/scripts/run-aetheria-conformance-consumer-smoke.ps1
index e47b108..4c2c567 100644
--- a/scripts/run-aetheria-conformance-consumer-smoke.ps1
+++ b/scripts/run-aetheria-conformance-consumer-smoke.ps1
@@ -38,6 +38,7 @@ Push-Location $AetheriaRoot
 try {
   node $consumerScript $consumerExport `
     --expect-pack provider `
+    --expect-schema gamecult.eve.provider_handoff.v1 `
     --expect-fixture aetheria-world `
     --expect-provider aetheria `
     --expect-scenario aetheria-world-command-replay `
diff --git a/scripts/run-conformance-consumer-smoke.ps1 b/scripts/run-conformance-consumer-smoke.ps1
index 1436fd2..688aed0 100644
--- a/scripts/run-conformance-consumer-smoke.ps1
+++ b/scripts/run-conformance-consumer-smoke.ps1
@@ -33,6 +33,7 @@ try {
   node .\tools\conformance\consume-export.mjs $consumerExport `
     --expect-capability-matrix `
     --expect-schema gamecult.eve.conformance_export.v1 `
+    --expect-schema gamecult.eve.conformance_handoff.v1 `
     --expect-schema gamecult.eve.capability_matrix.v1 `
     --expect-schema gamecult.eve.command_receipt.v1 `
     --expect-schema gamecult.eve.plugin_receipt.v1 `
@@ -41,6 +42,8 @@ try {
     --expect-schema gamecult.eve.runtime_release_request.v1 `
     --expect-schema gamecult.eve.runtime_capture_request.v1 `
     --expect-schema gamecult.eve.runtime_split_handoff.v1 `
+    --expect-schema gamecult.eve.plugin_handoff.v1 `
+    --expect-schema gamecult.eve.provider_handoff.v1 `
     --expect-capability-gap runtime:Fensalir:direct2d:capture:missing `
     --expect-world-lowering-coverage aetheria:aetheria.daemon.game:web-reference:claimed:Eve:web `
     --expect-world-lowering-coverage aetheria:aetheria.daemon.game:unity-uitoolkit:claimed:EveUnity:unity-uitoolkit `
diff --git a/scripts/run-eveconformance-handoff-smoke.ps1 b/scripts/run-eveconformance-handoff-smoke.ps1
index ca5694c..04a6263 100644
--- a/scripts/run-eveconformance-handoff-smoke.ps1
+++ b/scripts/run-eveconformance-handoff-smoke.ps1
@@ -75,18 +75,21 @@ foreach ($contract in @(
   "gamecult.eve.command.v1",
   "gamecult.eve.command_receipt.v1",
   "gamecult.eve.conformance_export.v1",
+  "gamecult.eve.conformance_handoff.v1",
   "gamecult.eve.capability_matrix.v1",
   "gamecult.eve.conformance_fixture.v1",
   "gamecult.eve.provider_scenario.v1",
   "gamecult.eve.plugin.v1",
   "gamecult.eve.plugin_receipt.v1",
   "gamecult.eve.plugin_advertisement.v1",
+  "gamecult.eve.plugin_handoff.v1",
   "gamecult.eve.plugin_abi_fixture.v1",
   "gamecult.eve.plugin_abi.request.v1",
   "gamecult.eve.plugin_abi.response.v1",
   "gamecult.eve.runtime_release_request.v1",
   "gamecult.eve.runtime_capture_request.v1",
   "gamecult.eve.provider_advertisement.v1",
+  "gamecult.eve.provider_handoff.v1",
   "gamecult.eve.runtime_capability.v1",
   "gamecult.eve.runtime_split_handoff.v1"
 )) {
@@ -114,16 +117,19 @@ if (Test-Path -LiteralPath (Join-Path $absoluteExportDirectory "index.json")) {
   }
   foreach ($schemaId in @(
     "gamecult.eve.conformance_export.v1",
+    "gamecult.eve.conformance_handoff.v1",
     "gamecult.eve.capability_matrix.v1",
     "gamecult.eve.conformance_fixture.v1",
     "gamecult.eve.provider_scenario.v1",
     "gamecult.eve.provider_advertisement.v1",
+    "gamecult.eve.provider_handoff.v1",
     "gamecult.eve.runtime_capability.v1",
     "gamecult.eve.runtime_split_handoff.v1",
     "gamecult.eve.command_receipt.v1",
     "gamecult.eve.plugin.v1",
     "gamecult.eve.plugin_receipt.v1",
     "gamecult.eve.plugin_advertisement.v1",
+    "gamecult.eve.plugin_handoff.v1",
     "gamecult.eve.plugin_abi_fixture.v1",
     "gamecult.eve.plugin_abi.request.v1",
     "gamecult.eve.plugin_abi.response.v1",
diff --git a/scripts/run-plugin-owner-conformance-consumer-smoke.ps1 b/scripts/run-plugin-owner-conformance-consumer-smoke.ps1
index 9356b91..22ce168 100644
--- a/scripts/run-plugin-owner-conformance-consumer-smoke.ps1
+++ b/scripts/run-plugin-owner-conformance-consumer-smoke.ps1
@@ -34,6 +34,7 @@ node $consumerScript $consumerExport `
   --expect-pack plugin `
   --expect-schema gamecult.eve.plugin.v1 `
   --expect-schema gamecult.eve.plugin_advertisement.v1 `
+  --expect-schema gamecult.eve.plugin_handoff.v1 `
   --expect-schema gamecult.eve.plugin_abi_fixture.v1 `
   --expect-schema gamecult.eve.plugin_abi.request.v1 `
   --expect-schema gamecult.eve.plugin_abi.response.v1 `
diff --git a/tools/conformance/eveconformance-handoff.json b/tools/conformance/eveconformance-handoff.json
index 52815e0..4785ef1 100644
--- a/tools/conformance/eveconformance-handoff.json
+++ b/tools/conformance/eveconformance-handoff.json
@@ -20,16 +20,19 @@
       "destinationOwner": "EveConformance",
       "currentPaths": [
         "schemas/gamecult.eve.conformance_export.v1.schema.json",
+        "schemas/gamecult.eve.conformance_handoff.v1.schema.json",
         "schemas/gamecult.eve.capability_matrix.v1.schema.json",
         "schemas/gamecult.eve.conformance_fixture.v1.schema.json",
         "schemas/gamecult.eve.provider_scenario.v1.schema.json",
         "schemas/gamecult.eve.provider_advertisement.v1.schema.json",
+        "schemas/gamecult.eve.provider_handoff.v1.schema.json",
         "schemas/gamecult.eve.runtime_capability.v1.schema.json",
         "schemas/gamecult.eve.runtime_split_handoff.v1.schema.json",
         "schemas/gamecult.eve.command_receipt.v1.schema.json",
         "schemas/gamecult.eve.plugin.v1.schema.json",
         "schemas/gamecult.eve.plugin_receipt.v1.schema.json",
         "schemas/gamecult.eve.plugin_advertisement.v1.schema.json",
+        "schemas/gamecult.eve.plugin_handoff.v1.schema.json",
         "schemas/gamecult.eve.plugin_abi_fixture.v1.schema.json",
         "schemas/gamecult.eve.plugin_abi.request.v1.schema.json",
         "schemas/gamecult.eve.plugin_abi.response.v1.schema.json",
@@ -69,18 +72,21 @@
     "gamecult.eve.command.v1",
     "gamecult.eve.command_receipt.v1",
     "gamecult.eve.conformance_export.v1",
+    "gamecult.eve.conformance_handoff.v1",
     "gamecult.eve.capability_matrix.v1",
     "gamecult.eve.conformance_fixture.v1",
     "gamecult.eve.provider_scenario.v1",
     "gamecult.eve.plugin.v1",
     "gamecult.eve.plugin_receipt.v1",
     "gamecult.eve.plugin_advertisement.v1",
+    "gamecult.eve.plugin_handoff.v1",
     "gamecult.eve.plugin_abi_fixture.v1",
     "gamecult.eve.plugin_abi.request.v1",
     "gamecult.eve.plugin_abi.response.v1",
     "gamecult.eve.runtime_release_request.v1",
     "gamecult.eve.runtime_capture_request.v1",
     "gamecult.eve.provider_advertisement.v1",
+    "gamecult.eve.provider_handoff.v1",
     "gamecult.eve.runtime_capability.v1",
     "gamecult.eve.runtime_split_handoff.v1"
   ],
diff --git a/tools/parity/parity-manifest.json b/tools/parity/parity-manifest.json
index da709bf..d17ce2c 100644
--- a/tools/parity/parity-manifest.json
+++ b/tools/parity/parity-manifest.json
@@ -18,12 +18,15 @@
     "gamecult.eve.plugin_abi.response.v1": "schemas/gamecult.eve.plugin_abi.response.v1.schema.json",
     "gamecult.eve.plugin_abi_fixture.v1": "schemas/gamecult.eve.plugin_abi_fixture.v1.schema.json",
     "gamecult.eve.plugin_advertisement.v1": "schemas/gamecult.eve.plugin_advertisement.v1.schema.json",
+    "gamecult.eve.plugin_handoff.v1": "schemas/gamecult.eve.plugin_handoff.v1.schema.json",
     "gamecult.eve.runtime_capability.v1": "schemas/gamecult.eve.runtime_capability.v1.schema.json",
     "gamecult.eve.runtime_split_handoff.v1": "schemas/gamecult.eve.runtime_split_handoff.v1.schema.json",
     "gamecult.eve.runtime_release_request.v1": "schemas/gamecult.eve.runtime_release_request.v1.schema.json",
     "gamecult.eve.runtime_capture_request.v1": "schemas/gamecult.eve.runtime_capture_request.v1.schema.json",
     "gamecult.eve.provider_scenario.v1": "schemas/gamecult.eve.provider_scenario.v1.schema.json",
-    "gamecult.eve.provider_advertisement.v1": "schemas/gamecult.eve.provider_advertisement.v1.schema.json"
+    "gamecult.eve.provider_advertisement.v1": "schemas/gamecult.eve.provider_advertisement.v1.schema.json",
+    "gamecult.eve.provider_handoff.v1": "schemas/gamecult.eve.provider_handoff.v1.schema.json",
+    "gamecult.eve.conformance_handoff.v1": "schemas/gamecult.eve.conformance_handoff.v1.schema.json"
   },
   "conformancePacks": [
     {
diff --git a/tools/parity/run-parity.mjs b/tools/parity/run-parity.mjs
index 2e5ac8b..8f1fe18 100644
--- a/tools/parity/run-parity.mjs
+++ b/tools/parity/run-parity.mjs
@@ -28,11 +28,15 @@ const pluginResults = await Promise.all((manifest.pluginManifests || []).map(plu
 const providerResults = await Promise.all((manifest.providerAdvertisements || []).map(provider => evaluateProvider(provider, fixtureResults, pluginResults)));
 const runtimeResults = await Promise.all(manifest.runtimes.map(runtime => evaluateRuntime(runtime, fixtureResults)));
 const splitTargetResults = evaluateSplitTargets(manifest.splitTargets || [], runtimeResults);
+const conformanceHandoffErrors = await validateConformanceHandoff(manifest.repoStrategy?.conformanceHandoffPath || "");
 const report = {
   schema: "gamecult.eve.parity_report.v1",
   generatedAt: new Date().toISOString(),
   manifest: path.relative(repoRoot, manifestPath).replaceAll("\\", "/"),
-  repoStrategy: manifest.repoStrategy || {},
+  repoStrategy: {
+    ...(manifest.repoStrategy || {}),
+    conformanceHandoffErrors,
+  },
   conformancePacks: manifest.conformancePacks || [],
   responsiveCases: manifest.responsiveCases || [],
   summary: summarize(fixtureResults, runtimeResults, pluginResults, providerResults, splitTargetResults),
@@ -60,7 +64,9 @@ console.log(`Parity report: ${path.relative(repoRoot, path.join(runDirectory, "p
 console.log(`Conformance export: ${path.relative(repoRoot, path.join(conformanceOutputRoot, "latest", "index.md"))}`);
 for (const error of conformanceExportErrors) console.error(`Conformance export error: ${error}`);
 if (report.summary.failedFixtures > 0) process.exitCode = 1;
+if (report.summary.failedPlugins > 0) process.exitCode = 1;
 if (report.summary.failedProviders > 0) process.exitCode = 1;
+if (conformanceHandoffErrors.length > 0) process.exitCode = 1;
 if (conformanceExportErrors.length > 0) process.exitCode = 1;
 
 async function evaluateFixture(fixture) {
@@ -452,6 +458,19 @@ async function validateRuntimeSplitHandoff(runtime, splitHandoffPath) {
   );
 }
 
+async function validateConformanceHandoff(handoffPath) {
+  if (!handoffPath) return ["handoffPath:missing"];
+  return validateJsonDocument(
+    manifest.schemas?.["gamecult.eve.conformance_handoff.v1"],
+    handoffPath,
+    {
+      schema: "gamecult.eve.conformance_handoff.v1",
+      splitTarget: "EveConformance",
+      ownerRepo: "EveConformance",
+    },
+  );
+}
+
 function normalizePath(candidate) {
   return candidate.replaceAll("\\", "/").replace(/^\.\//, "");
 }
@@ -482,6 +501,7 @@ async function evaluatePlugin(plugin, fixtureResults) {
   const abiOperations = await readPluginAbiOperations(plugin.abiFixturePath);
   const abiOperationContracts = await readPluginAbiOperationContracts(plugin.abiFixturePath);
   const abiErrors = await validatePluginAbiFixture(plugin);
+  const handoffErrors = await validatePluginHandoff(plugin);
   const status = missingPaths.length
     ? "missing-body"
     : missingRequiredFixtures.length
@@ -496,9 +516,11 @@ async function evaluatePlugin(plugin, fixtureResults) {
               ? "invalid-plugin-runtime-boundary"
               : abiErrors.length
               ? "invalid-plugin-abi-fixture"
-              : plugin.kind === "incubating"
-                ? "incubating"
-                : "external-owner-planned";
+              : handoffErrors.length
+                ? "invalid-plugin-handoff"
+                : plugin.kind === "incubating"
+                  ? "incubating"
+                  : "external-owner-planned";
 
   return {
     pluginId: plugin.pluginId,
@@ -518,6 +540,7 @@ async function evaluatePlugin(plugin, fixtureResults) {
     manifestPath: plugin.manifestPath || "",
     abiFixturePath: plugin.abiFixturePath || "",
     handoffPath: plugin.handoffPath || "",
+    handoffErrors,
     abiOperations,
     abiOperationContracts,
     advertisementSchemaPath: plugin.advertisementSchemaPath || "",
@@ -532,6 +555,19 @@ async function evaluatePlugin(plugin, fixtureResults) {
   };
 }
 
+async function validatePluginHandoff(plugin) {
+  if (!plugin.handoffPath) return [];
+  return validateJsonDocument(
+    manifest.schemas?.["gamecult.eve.plugin_handoff.v1"],
+    plugin.handoffPath,
+    {
+      schema: "gamecult.eve.plugin_handoff.v1",
+      pluginId: plugin.pluginId,
+      ownerRepo: plugin.ownerRepo,
+    },
+  );
+}
+
 async function readPluginAbiOperations(abiFixturePath) {
   if (!abiFixturePath) return [];
   try {
@@ -703,6 +739,7 @@ async function evaluateProvider(provider, fixtureResults, pluginResults) {
   const missingCommands = (provider.expectedCommands || []).filter(command => !commandIds.includes(command));
   const scenarioErrors = await validateProviderScenario(provider, advertisement, fixtureResults, advertisedSchemaIds, surfaceIds, commandIds);
   const scenario = scenarioErrors.length || !provider.scenarioPath ? null : await readJsonDocument(provider.scenarioPath);
+  const handoffErrors = await validateProviderHandoff(provider);
   const status = missingPaths.length
     ? "missing-body"
     : missingRequiredFixtures.length
@@ -715,7 +752,9 @@ async function evaluateProvider(provider, fixtureResults, pluginResults) {
             ? "capability-gap"
             : scenarioErrors.length
               ? "invalid-provider-scenario"
-              : "advertised";
+              : handoffErrors.length
+                ? "invalid-provider-handoff"
+                : "advertised";
 
   return {
     providerId: provider.providerId,
@@ -730,6 +769,7 @@ async function evaluateProvider(provider, fixtureResults, pluginResults) {
     advertisementPath: provider.advertisementPath || "",
     scenarioPath: provider.scenarioPath || "",
     handoffPath: provider.handoffPath || "",
+    handoffErrors,
     advertisementErrors,
     scenarioErrors,
     expectedPaths,
@@ -758,6 +798,19 @@ async function evaluateProvider(provider, fixtureResults, pluginResults) {
   };
 }
 
+async function validateProviderHandoff(provider) {
+  if (!provider.handoffPath) return [];
+  return validateJsonDocument(
+    manifest.schemas?.["gamecult.eve.provider_handoff.v1"],
+    provider.handoffPath,
+    {
+      schema: "gamecult.eve.provider_handoff.v1",
+      providerId: provider.providerId,
+      ownerRepo: provider.ownerRepo,
+    },
+  );
+}
+
 function collectProviderPluginRequirements(advertisement) {
   const requirements = [];
   for (const surface of advertisement.surfaces || []) {
@@ -1687,6 +1740,7 @@ function summarize(fixtures, runtimes, plugins, providers, splitTargets) {
     failedFixtures: fixtures.filter(fixture => fixture.status !== "pass").length,
     totalPlugins: plugins.length,
     healthyPlugins: plugins.filter(plugin => plugin.status === "incubating" || plugin.status === "external-owner-planned").length,
+    failedPlugins: plugins.filter(plugin => plugin.status !== "incubating" && plugin.status !== "external-owner-planned").length,
     totalProviders: providers.length,
     advertisedProviders: providers.filter(provider => provider.status === "advertised").length,
     failedProviders: providers.filter(provider => provider.status !== "advertised").length,
@@ -1784,6 +1838,7 @@ function buildConformanceExport(report) {
       manifestPath: plugin.manifestPath,
       advertisementPath: plugin.advertisementPath,
       handoffPath: plugin.handoffPath,
+      handoffErrors: plugin.handoffErrors || [],
       handoffExportPath: makeHandoffExportPath("plugin", plugin.pluginId, plugin.handoffPath),
       abiFixturePath: plugin.abiFixturePath,
       abiOperations: plugin.abiOperations || [],
@@ -1799,6 +1854,7 @@ function buildConformanceExport(report) {
       advertisementPath: provider.advertisementPath,
       scenarioPath: provider.scenarioPath,
       handoffPath: provider.handoffPath,
+      handoffErrors: provider.handoffErrors || [],
       handoffExportPath: makeHandoffExportPath("provider", provider.providerId, provider.handoffPath),
       scenarioId: provider.scenarioId,
       receiptStates: provider.scenarioReceiptStates || [],
@@ -1938,6 +1994,7 @@ function collectCapabilityGaps(report) {
       ...(plugin.advertisementErrors || []).map(id => `advertisement:${id}`),
       ...(plugin.runtimeBoundaryErrors || []).map(id => `runtime-boundary:${id}`),
       ...(plugin.abiErrors || []).map(id => `abi:${id}`),
+      ...(plugin.handoffErrors || []).map(id => `handoff:${id}`),
     ]) {
       addGap({
         kind: "plugin",
@@ -1961,6 +2018,7 @@ function collectCapabilityGaps(report) {
       ...(provider.missingSurfaceKinds || []).map(id => `surface-kind:${id}`),
       ...(provider.missingCommands || []).map(id => `command:${id}`),
       ...(provider.pluginRequirementErrors || []).map(id => `plugin:${id}`),
+      ...(provider.handoffErrors || []).map(id => `handoff:${id}`),
     ]) {
       addGap({
         kind: "provider",
@@ -2037,6 +2095,16 @@ function collectCapabilityGaps(report) {
     }
   }
 
+  for (const error of report.repoStrategy?.conformanceHandoffErrors || []) {
+    addGap({
+      kind: "conformance",
+      ownerRepo: "EveConformance",
+      subjectId: "EveConformance",
+      gap: `handoff:${error}`,
+      severity: "blocker",
+    });
+  }
+
   return gaps;
 }