diff --git a/server/ws/groupManager.js b/server/ws/groupManager.js
index 9ecab55..073e1b6 100644
--- a/server/ws/groupManager.js
+++ b/server/ws/groupManager.js
@@ -161,6 +161,15 @@ export function getGroup(groupId) {
   return groups.get(groupId) || null;
 }
 
+// Facade-only lookup for the MCP layer: repo_info needs the group's project
+// directory (and nothing else), so the facade exposes just the cwd instead of
+// the raw group object (which carries controlBroker socket paths, handoff
+// channels, handoffQueue, allowedCwds -- internals an LLM-facing tool must not
+// reach).
+export function getGroupCwd(groupId) {
+  return groups.get(groupId)?.cwd ?? null;
+}
+
 // Declare a group fully assembled (all initial members spawned): from here on
 // the "no live members" auto-destroy in onSessionExit applies. Called by the
 // POST /groups handler after the last member is registered. No-op for groups
@@ -750,6 +759,7 @@ const groupManagerApi = {
   listGroupMembers,
   isSessionInGroup,
   getRoleForSession,
+  getGroupCwd,
   setCurrentTurn,
   pushHandoff,
   takeHandoff,
diff --git a/server/ws/mcpConfig.js b/server/ws/mcpConfig.js
index 615345d..d8fff11 100644
--- a/server/ws/mcpConfig.js
+++ b/server/ws/mcpConfig.js
@@ -16,6 +16,10 @@
 //               sessions in the same cwd cannot collide).
 //   opencode -> OPENCODE_CONFIG_CONTENT env var (deep-merged with project
 //               config, no file written).
+//   copilot  -> nothing. copilot has no CLI-arg/env MCP injection (its config
+//               is file-based only), so `buildMcpConfigArgsAndEnv` never
+//               assembles an injection for it -- passing `--mcp-config` would
+//               make the binary error out with "unknown option".
 //
 // The optional `{ notify }` descriptor adds the ccserver-notify MCP server:
 //   { mode, sockPath, identity? }
@@ -58,6 +62,15 @@ export function buildMcpConfigArgsAndEnv(app, { groupMcp = true, notify } = {})
   const notifySockEnv = notify ? { CCSANDBOX_NOTIFY_MCP_SOCK: notify.sockPath } : {};
   const notifyIdentityEnv = notify?.identity ? { CCSERVER_NOTIFY_IDENTITY: JSON.stringify(notify.identity) } : {};
 
+  if (app === 'copilot') {
+    // No CLI-arg/env MCP injection exists for copilot: assembling one would
+    // reach the binary as `--mcp-config` and die with "unknown option". The
+    // function is the single assembly point, so refusing here guarantees no
+    // copilot launch path ever injects (group launches already refuse copilot
+    // at open_tab / addMember).
+    return { args: [], env: {} };
+  }
+
   if (app === 'opencode') {
     const mcp = {};
     if (groupMcp) mcp.ccserver = { type: 'local', command: [MCP_BRIDGE_COMMAND] };
diff --git a/server/ws/mcpConfig.test.js b/server/ws/mcpConfig.test.js
index 3f4dabf..07f7b2f 100644
--- a/server/ws/mcpConfig.test.js
+++ b/server/ws/mcpConfig.test.js
@@ -35,6 +35,33 @@ test('unknown app falls back to the claude-style CLI arg (default branch)', () =
   assert.ok(JSON.parse(args[1]).mcpServers.ccserver);
 });
 
+// copilot has no CLI-arg/env MCP injection (file-based config only), so the
+// assembly point must produce nothing for it -- otherwise the `--mcp-config`
+// flag reaches the binary and it errors with "unknown option".
+test('copilot gets no injection at all: empty args and env, even with groupMcp', () => {
+  const { args, env } = buildMcpConfigArgsAndEnv('copilot');
+  assert.deepEqual(args, [], 'no CLI args (--mcp-config must never appear)');
+  assert.deepEqual(env, {}, 'no env injection');
+  assert.ok(!args.join(' ').includes('--mcp-config'));
+});
+
+test('copilot + notify(sandbox): nothing is assembled for either server', () => {
+  const { args, env } = buildMcpConfigArgsAndEnv('copilot', {
+    groupMcp: true,
+    notify: { mode: 'sandbox', sockPath: '/run/user/1000/ccserver-notify.sock', identity },
+  });
+  assert.deepEqual(args, [], 'no CLI args (--mcp-config must never appear)');
+  assert.deepEqual(env, {}, 'no env injection');
+});
+
+test('copilot + notify(host): nothing is assembled for either server', () => {
+  const { args, env } = buildMcpConfigArgsAndEnv('copilot', {
+    notify: { mode: 'host', sockPath: '/run/user/1000/ccserver-notify.sock', identity },
+  });
+  assert.deepEqual(args, [], 'no CLI args (--mcp-config must never appear)');
+  assert.deepEqual(env, {}, 'no env injection');
+});
+
 // ccserver-notify injection (see notify.js): the optional `{ notify }`
 // descriptor adds the notify server to the same registration, with the bridge
 // command switching on the session's sandbox mode. sessionManager always
diff --git a/server/ws/mcpTools.js b/server/ws/mcpTools.js
index b14cd1e..dbd9a63 100644
--- a/server/ws/mcpTools.js
+++ b/server/ws/mcpTools.js
@@ -185,8 +185,9 @@ export function handoffToOrchestrator(deps, { summary, status = 'done', nextRole
 // --- repo_info -------------------------------------------------------------
 // Shallow repository facts for the orchestrator (control server only).
 // Security/cost posture, mirroring read_output:
-//   - cwd is the group's project directory (group.cwd) -- never taken from
-//     the wire, so there is no path argument to traverse with.
+//   - cwd is the group's project directory -- obtained through the group
+//     facade's getGroupCwd(groupId), never from the wire, so there is no path
+//     argument to traverse with.
 //   - read-only: no writes; the only command execution is the fixed git
 //     invocations below (`git -C <cwd>` with a whitelisted argument list,
 //     never caller input).
@@ -290,11 +291,10 @@ async function gitState(cwd) {
 }
 
 export async function repoInfo(deps) {
-  const group = deps.groupManager.getGroup(deps.groupId);
-  if (!group) {
+  const cwd = deps.groupManager.getGroupCwd(deps.groupId);
+  if (!cwd) {
     return { error: 'group-not-found', message: 'group not found' };
   }
-  const cwd = group.cwd;
   return {
     cwd,
     root: await rootListing(cwd),
diff --git a/server/ws/mcpTools.test.js b/server/ws/mcpTools.test.js
index 001f753..1921354 100644
--- a/server/ws/mcpTools.test.js
+++ b/server/ws/mcpTools.test.js
@@ -62,6 +62,19 @@ function controlDeps(groupId) {
   };
 }
 
+// The production deps shape for broker servers: groupManager arrives as the
+// narrow groupManagerApi facade (groupManager.js), which deliberately exposes
+// getGroupCwd but NOT the raw getGroup (the group object carries controlBroker
+// socket paths, handoff channels, etc. that LLM-facing tools must not reach).
+// repo_info must work against exactly this shape.
+function prodFacadeDeps(groupId) {
+  return {
+    groupId,
+    groupManager: { getGroupCwd: (id) => groupManager.getGroupCwd(id) },
+    sessionManager: { getSession: () => null, writeToSession: () => false, waitUntilSettled: async () => ({ settled: true }) },
+  };
+}
+
 // deps the way mcpServer would build them for a worker's handoff socket:
 // sessionId comes from the closure (here a fake registered id), never from args
 function handoffDeps(groupId, role, sessionId) {
@@ -732,3 +745,32 @@ test('repoInfo: caps bite (root 100 entries, README 8KB, package keys 50)', asyn
   assert.equal(out.packageJson.scripts.length, 50, 'scripts keys capped at 50');
   assert.equal(out.packageJson.dependencies.length, 50, 'dependencies keys capped at 50');
 });
+
+// Regression: production broker deps hand repo_info the narrow groupManager
+// facade (getGroupCwd only -- the full module's getGroup is never reachable),
+// which used to crash with "deps.groupManager.getGroup is not a function".
+test('repoInfo works against the production facade shape (no getGroup on groupManager)', async () => {
+  const dir = makeTmpRepo('facade');
+  writeFileSync(join(dir, 'README.md'), '# Facade Project');
+  const gid = randomUUID();
+  await groupManager.createGroup({ groupId: gid, cwd: dir, orchestratorDir: join(dir, '..', 'orch') });
+  groupsToDestroy.push(gid);
+
+  const deps = prodFacadeDeps(gid);
+  assert.equal(typeof deps.groupManager.getGroup, 'undefined', 'facade shape must not expose getGroup');
+  assert.equal(typeof deps.groupManager.getGroupCwd, 'function');
+
+  const out = await tools.repoInfo(deps);
+  assert.equal(out.error, undefined);
+  assert.equal(out.cwd, dir);
+  assert.equal(out.readme.file, 'README.md');
+  assert.ok(out.readme.text.includes('Facade Project'));
+  assert.ok(out.root.files.includes('README.md'));
+});
+
+test('repoInfo: group-not-found also works against the production facade shape', async () => {
+  const deps = prodFacadeDeps('no-such-group');
+  assert.equal(typeof deps.groupManager.getGroup, 'undefined', 'facade shape must not expose getGroup');
+  const out = await tools.repoInfo(deps);
+  assert.equal(out.error, 'group-not-found');
+});
diff --git a/server/ws/notify.js b/server/ws/notify.js
index a88647d..1e8bb14 100644
--- a/server/ws/notify.js
+++ b/server/ws/notify.js
@@ -82,9 +82,11 @@ export function notifyEnabled() {
 //   - shells (app null) never get it,
 //   - workers (groupRole !== 'orchestrator') never get it -- only the
 //     orchestrator of a combo and standalone agent sessions do,
+//   - copilot never gets it (no CLI-arg/env MCP injection; the notify server
+//     would be unreachable), even as a standalone agent,
 //   - nothing is injected when the feature is disabled.
 export function shouldInjectNotify({ shell, app, groupId, groupRole, notifyEnabled }) {
-  return !shell && app != null && !!notifyEnabled
+  return !shell && app != null && app !== 'copilot' && !!notifyEnabled
     && (groupId == null || groupRole === 'orchestrator');
 }
 
diff --git a/server/ws/notify.test.js b/server/ws/notify.test.js
index 1884ad5..555df6d 100644
--- a/server/ws/notify.test.js
+++ b/server/ws/notify.test.js
@@ -70,6 +70,12 @@ test('shouldInjectNotify: standalone agents and combo orchestrators only', () =>
   assert.equal(shouldInjectNotify({ ...base, notifyEnabled: false }), false, 'feature disabled -> never');
 });
 
+test('shouldInjectNotify: copilot is never injected (no CLI-arg/env MCP injection)', () => {
+  const base = { shell: false, app: 'copilot', groupId: null, groupRole: null, notifyEnabled: true };
+  assert.equal(shouldInjectNotify(base), false, 'standalone copilot never gets the notify server');
+  assert.equal(shouldInjectNotify({ ...base, groupId: 'g1', groupRole: 'orchestrator' }), false, 'copilot as combo orchestrator also never');
+});
+
 test('subscribe/unsubscribe/list persist to the state file and restore', async () => {
   await withNotifyConfig(
     { notify: { subscriptions: [{ url: 'https://seed.example/webhook', name: 'seed' }] } },