diff --git a/src/ccs.ts b/src/ccs.ts
index e858ab1d..25c27c11 100644
--- a/src/ccs.ts
+++ b/src/ccs.ts
@@ -30,7 +30,7 @@ import { getGlobalEnvConfig } from './config/unified-config-loader';
 import { ensureProfileHooks as ensureImageAnalyzerHooks } from './utils/hooks/image-analyzer-profile-hook-injector';
 import { getImageAnalysisHookEnv } from './utils/hooks';
 import { fail, info, warn } from './utils/ui';
-import { isCopilotSubcommandToken, isLikelyCopilotFlagAlias } from './copilot/constants';
+import { isCopilotSubcommandToken } from './copilot/constants';
 
 // Import centralized error handling
 import { handleError, runCleanup } from './errors';
@@ -573,13 +573,10 @@ async function main(): Promise<void> {
   }
 
   // Special case: copilot command (GitHub Copilot integration)
-  // Route known subcommands and likely mistyped aliases (`--statu`) to command handler.
-  // Non-command Claude args still pass through profile flow.
+  // Route known subcommands to command handler, keep all other args as profile passthrough.
   if (firstArg === 'copilot' && args.length > 1) {
     const copilotToken = args[1];
-    const shouldRouteToCopilotCommand =
-      isCopilotSubcommandToken(copilotToken) ||
-      (args.length === 2 && isLikelyCopilotFlagAlias(copilotToken));
+    const shouldRouteToCopilotCommand = isCopilotSubcommandToken(copilotToken);
 
     if (shouldRouteToCopilotCommand) {
       const { handleCopilotCommand } = await import('./commands/copilot-command');
diff --git a/src/commands/copilot-command.ts b/src/commands/copilot-command.ts
index 2bdb2b1d..7b6620ee 100644
--- a/src/commands/copilot-command.ts
+++ b/src/commands/copilot-command.ts
@@ -49,7 +49,8 @@ export async function handleCopilotCommand(args: string[]): Promise<number> {
     default:
       console.error(fail(`Unknown subcommand: ${subcommand}`));
       console.error('');
-      return handleHelp();
+      handleHelp();
+      return 1;
   }
 }
 
diff --git a/src/copilot/constants.ts b/src/copilot/constants.ts
index cc594afd..c5bb8b07 100644
--- a/src/copilot/constants.ts
+++ b/src/copilot/constants.ts
@@ -45,23 +45,3 @@ export function normalizeCopilotSubcommand(token?: string): string | undefined {
 export function isCopilotSubcommandToken(token?: string): boolean {
   return Boolean(token) && COPILOT_SUBCOMMAND_TOKENS.includes(token as string);
 }
-
-/**
- * Detect likely mistyped copilot flag aliases (e.g. `--statu`).
- * This helps entrypoint routing show command help instead of falling through
- * to profile execution for obvious copilot-command typos.
- */
-export function isLikelyCopilotFlagAlias(token?: string): boolean {
-  if (!token || !token.startsWith('--') || token === '--') {
-    return false;
-  }
-
-  const alias = token.slice(2).toLowerCase();
-  if (!/^[a-z][a-z0-9-]*$/.test(alias)) {
-    return false;
-  }
-
-  return COPILOT_SUBCOMMANDS.some(
-    (subcommand) => subcommand.startsWith(alias) || alias.startsWith(subcommand)
-  );
-}
diff --git a/src/copilot/copilot-daemon.ts b/src/copilot/copilot-daemon.ts
index c8cc09fe..4ec2d75b 100644
--- a/src/copilot/copilot-daemon.ts
+++ b/src/copilot/copilot-daemon.ts
@@ -289,12 +289,11 @@ export async function stopDaemon(): Promise<{ success: boolean; error?: string }
   try {
     const ownership = verifyProcessOwnership(pid, (commandLine) => {
       const lower = commandLine.toLowerCase();
-      const hasCopilotApiBinary = /(^|[\\/\s])copilot-api(\.cmd|\.exe)?(\s|$)/.test(lower);
+      const hasCopilotApiBinary = /copilot-api(\.cmd|\.exe)?/.test(lower);
       const hasStartCommand = /\bstart\b/.test(lower);
-      const hasExpectedPort =
-        lower.includes(`--port ${configuredPort}`) || lower.includes(`--port=${configuredPort}`);
+      const hasPortArgument = /--port(?:\s+|=)\d+\b/.test(lower);
       // copilot-api is launched as `... copilot-api start --port <n>`
-      return hasCopilotApiBinary && hasStartCommand && hasExpectedPort;
+      return hasCopilotApiBinary && hasStartCommand && hasPortArgument;
     });
     if (ownership === 'not-running') {
       removePidFile();
diff --git a/src/web-server/routes/copilot-routes.ts b/src/web-server/routes/copilot-routes.ts
index 31cf897c..625c160c 100644
--- a/src/web-server/routes/copilot-routes.ts
+++ b/src/web-server/routes/copilot-routes.ts
@@ -92,6 +92,25 @@ router.put('/config', (req: Request, res: Response): void => {
       return;
     }
     const payload = updates as Record<string, unknown>;
+    const allowedKeys = new Set([
+      'enabled',
+      'auto_start',
+      'port',
+      'account_type',
+      'rate_limit',
+      'wait_on_limit',
+      'model',
+      'opus_model',
+      'sonnet_model',
+      'haiku_model',
+    ]);
+    const unknownKeys = Object.keys(payload).filter((key) => !allowedKeys.has(key));
+    if (unknownKeys.length > 0) {
+      res.status(400).json({
+        error: `Unknown copilot config field(s): ${unknownKeys.join(', ')}`,
+      });
+      return;
+    }
 
     if ('port' in payload) {
       if (typeof payload.port !== 'number' || !Number.isInteger(payload.port)) {
diff --git a/tests/unit/copilot/copilot-command-aliases.test.ts b/tests/unit/copilot/copilot-command-aliases.test.ts
index cb8c19ca..4cc4b7ae 100644
--- a/tests/unit/copilot/copilot-command-aliases.test.ts
+++ b/tests/unit/copilot/copilot-command-aliases.test.ts
@@ -2,7 +2,6 @@ import { describe, expect, it } from 'bun:test';
 import {
   COPILOT_SUBCOMMANDS,
   COPILOT_SUBCOMMAND_TOKENS,
-  isLikelyCopilotFlagAlias,
   normalizeCopilotSubcommand,
 } from '../../../src/copilot/constants';
 
@@ -24,13 +23,6 @@ describe('copilot command aliases', () => {
     expect(normalizeCopilotSubcommand('unknown')).toBe('unknown');
   });
 
-  it('detects likely mistyped command aliases for entrypoint routing', () => {
-    expect(isLikelyCopilotFlagAlias('--statu')).toBe(true);
-    expect(isLikelyCopilotFlagAlias('--enabl')).toBe(true);
-    expect(isLikelyCopilotFlagAlias('--print')).toBe(false);
-    expect(isLikelyCopilotFlagAlias('--')).toBe(false);
-  });
-
   it('exposes complete routing token list for ccs entrypoint', () => {
     for (const subcommand of COPILOT_SUBCOMMANDS) {
       expect(COPILOT_SUBCOMMAND_TOKENS).toContain(subcommand);