diff --git a/integrations/README.md b/integrations/README.md
index 52a9930..b25d0dc 100644
--- a/integrations/README.md
+++ b/integrations/README.md
@@ -6,6 +6,8 @@ The provider-level contract represents the default stable runtime. `contract_var
 
 Grok Build adapters write native user hook files under `$GROK_HOME/hooks` or `~/.grok/hooks`. Project `.grok/hooks` files require `/hooks-trust` or `--trust`; Claude Code and Cursor hook files are read-only compatibility sources for Elydora.
 
+GitHub Copilot command `preToolUse` hooks deny on crashes and every non-zero exit. Command timeouts continue through the normal permission flow, so `timeout_failure_mode` records that explicit exception when it differs from `failure_mode`.
+
 `delivery_state` is computed from the `node`, `python`, and `go` adapter flags:
 
 | State | Meaning |
diff --git a/integrations/catalog.json b/integrations/catalog.json
index da8df72..d40aea8 100644
--- a/integrations/catalog.json
+++ b/integrations/catalog.json
@@ -122,6 +122,7 @@
       "integration_mode": "command_hooks",
       "config_format": "json",
       "config_paths": [
+        "$COPILOT_HOME/hooks/*.json",
         "~/.copilot/hooks/*.json",
         ".github/hooks/*.json"
       ],
@@ -129,9 +130,15 @@
         "before_tool": "preToolUse",
         "after_tool": "postToolUse"
       },
+      "event_fields": {
+        "name": "toolName",
+        "input": "toolArgs",
+        "session": "sessionId"
+      },
       "blocking": {
-        "mechanism": "exit_code_2",
-        "failure_mode": "fail_open"
+        "mechanism": "any_nonzero_exit",
+        "failure_mode": "fail_closed",
+        "timeout_failure_mode": "fail_open"
       },
       "adapters": { "node": true, "python": true, "go": true },
       "delivery_state": "available",
diff --git a/integrations/catalog.schema.json b/integrations/catalog.schema.json
index 0f83a15..e1e3dcc 100644
--- a/integrations/catalog.schema.json
+++ b/integrations/catalog.schema.json
@@ -148,6 +148,12 @@
                   "fail_closed",
                   "fail_open"
                 ]
+              },
+              "timeout_failure_mode": {
+                "enum": [
+                  "fail_closed",
+                  "fail_open"
+                ]
               }
             }
           },
@@ -332,6 +338,12 @@
                 "fail_closed",
                 "fail_open"
               ]
+            },
+            "timeout_failure_mode": {
+              "enum": [
+                "fail_closed",
+                "fail_open"
+              ]
             }
           }
         },
diff --git a/test/integration-catalog.test.mjs b/test/integration-catalog.test.mjs
index b74f4ed..958f977 100644
--- a/test/integration-catalog.test.mjs
+++ b/test/integration-catalog.test.mjs
@@ -219,6 +219,10 @@ test('schema freezes the provider contract and supported enums', async () => {
       'json_stdout_cancel',
     ),
   );
+  assert.deepEqual(
+    providerSchema.properties.blocking.properties.timeout_failure_mode.enum,
+    ['fail_closed', 'fail_open'],
+  );
   assert.deepEqual(providerSchema.properties.delivery_state.enum, ['available', 'partial', 'planned']);
   assert.equal(providerSchema.properties.contract_variants.items.$ref, '#/$defs/contractVariant');
   assert.deepEqual(schema.$defs.contractVariant.properties.release_channel.enum, [
@@ -273,6 +277,25 @@ test('high-drift providers retain their verified hook contracts', async () => {
     '~/.codex/hooks.json',
     '.codex/hooks.json',
   ]);
+  assert.deepEqual(providers.get('copilot').config_paths, [
+    '$COPILOT_HOME/hooks/*.json',
+    '~/.copilot/hooks/*.json',
+    '.github/hooks/*.json',
+  ]);
+  assert.deepEqual(providers.get('copilot').events, {
+    before_tool: 'preToolUse',
+    after_tool: 'postToolUse',
+  });
+  assert.deepEqual(providers.get('copilot').event_fields, {
+    name: 'toolName',
+    input: 'toolArgs',
+    session: 'sessionId',
+  });
+  assert.deepEqual(providers.get('copilot').blocking, {
+    mechanism: 'any_nonzero_exit',
+    failure_mode: 'fail_closed',
+    timeout_failure_mode: 'fail_open',
+  });
   assert.deepEqual(providers.get('droid').config_paths, [
     '~/.factory/hooks.json',
     '~/.factory/settings.json',