feat(targets): support CCS_DROID_ALIASES argv0 mapping

- extend argv[0] target resolution with env-configurable aliases

- normalize alias matching to lowercase with safe-name filtering

- add tests for custom aliases, invalid entries, and case-insensitivity

src/targets/target-resolver.ts

@@ -18,6 +18,25 @@ import { TargetType } from './target-adapter';
 const ARGV0_TARGET_MAP: Record<string, TargetType> = {
   ccsd: 'droid',
 };
+const ALIAS_NAME_REGEX = /^[a-z0-9._-]+$/;
+
+function buildArgv0TargetMap(): Record<string, TargetType> {
+  const map: Record<string, TargetType> = { ...ARGV0_TARGET_MAP };
+  const envAliases = process.env['CCS_DROID_ALIASES'];
+  if (!envAliases) {
+    return map;
+  }
+
+  for (const rawAlias of envAliases.split(',')) {
+    const alias = rawAlias.trim().toLowerCase();
+    if (!alias || !ALIAS_NAME_REGEX.test(alias)) {
+      continue;
+    }
+    map[alias] = 'droid';
+  }
+
+  return map;
+}
 
 /**
  * Valid target types for --target flag validation.
@@ -108,8 +127,9 @@ export function resolveTargetType(
   // 3. Check argv[0] (busybox pattern)
   // Strip common wrapper extensions for Windows shims/wrappers
   const rawBin = path.basename(process.argv[1] || process.argv0 || '');
-  const binName = rawBin.replace(/\.(cmd|bat|ps1|exe)$/i, '');
+  const binName = rawBin.replace(/\.(cmd|bat|ps1|exe)$/i, '').toLowerCase();
-  const argv0Target = ARGV0_TARGET_MAP[binName];
+  const argv0TargetMap = buildArgv0TargetMap();
+  const argv0Target = argv0TargetMap[binName];
   if (argv0Target) {
     return argv0Target;
   }

tests/unit/targets/target-resolver.test.ts

@@ -6,9 +6,15 @@ import { resolveTargetType, stripTargetFlag } from '../../../src/targets/target-
 
 describe('resolveTargetType', () => {
   const originalArgv = process.argv;
+  const originalDroidAliases = process.env.CCS_DROID_ALIASES;
 
   afterEach(() => {
     process.argv = originalArgv;
+    if (originalDroidAliases === undefined) {
+      delete process.env.CCS_DROID_ALIASES;
+    } else {
+      process.env.CCS_DROID_ALIASES = originalDroidAliases;
+    }
   });
 
   it('should return claude as default', () => {
@@ -41,6 +47,24 @@ describe('resolveTargetType', () => {
     expect(resolveTargetType([])).toBe('droid');
   });
 
+  it('should detect custom argv[0] aliases from CCS_DROID_ALIASES', () => {
+    process.env.CCS_DROID_ALIASES = 'droidx,my-droid';
+    process.argv = ['node', 'my-droid'];
+    expect(resolveTargetType([])).toBe('droid');
+  });
+
+  it('should ignore invalid custom alias entries', () => {
+    process.env.CCS_DROID_ALIASES = 'valid_alias,../bad,';
+    process.argv = ['node', '../bad'];
+    expect(resolveTargetType([])).toBe('claude');
+  });
+
+  it('should normalize argv[0] and custom aliases case-insensitively', () => {
+    process.env.CCS_DROID_ALIASES = 'DroidCaps';
+    process.argv = ['node', 'DROIDCAPS'];
+    expect(resolveTargetType([])).toBe('droid');
+  });
+
   it('should strip .cmd extension on Windows argv[0]', () => {
     process.argv = ['node', 'ccsd.cmd'];
     expect(resolveTargetType([])).toBe('droid');