diff --git a/src/installer/targets/deepcode.ts b/src/installer/targets/deepcode.ts
new file mode 100644
index 000000000..1be4f7c74
--- /dev/null
+++ b/src/installer/targets/deepcode.ts
@@ -0,0 +1,115 @@
+/**
+ * DeepCode target. Writes the MCP server entry into DeepCode's settings
+ * file (`~/.deepcode/settings.json`). DeepCode has a single user-level
+ * config — global and local both write here.
+ *
+ * See https://deepcode.vegamo.cn/docs/configuration/mcp
+ */
+
+import * as fs from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+import {
+  AgentTarget,
+  DetectionResult,
+  InstallOptions,
+  Location,
+  WriteResult,
+} from './types';
+import {
+  getMcpServerConfig,
+  jsonDeepEqual,
+  readJsonFile,
+  writeJsonFile,
+} from './shared';
+
+function configDir(_loc: Location): string {
+  return path.join(os.homedir(), '.deepcode');
+}
+
+function settingsPath(loc: Location): string {
+  return path.join(configDir(loc), 'settings.json');
+}
+
+class DeepcodeTarget implements AgentTarget {
+  readonly id = 'deepcode' as const;
+  readonly displayName = 'DeepCode';
+
+  supportsLocation(_loc: Location): boolean {
+    return true;
+  }
+
+  detect(loc: Location): DetectionResult {
+    const file = settingsPath(loc);
+    const config = readJsonFile(file);
+    const alreadyConfigured = !!config.mcpServers?.codegraph;
+    const installed = fs.existsSync(configDir(loc)) || fs.existsSync(file);
+    return { installed, alreadyConfigured, configPath: file };
+  }
+
+  install(loc: Location, _opts: InstallOptions): WriteResult {
+    const files: WriteResult['files'] = [];
+
+    // 1. MCP server entry
+    files.push(writeMcpEntry(loc));
+
+    return {
+      files,
+      notes: [
+        'Restart DeepCode for MCP changes to take effect.',
+      ],
+    };
+  }
+
+  uninstall(loc: Location): WriteResult {
+    const files: WriteResult['files'] = [];
+
+    // 1. MCP server entry
+    const file = settingsPath(loc);
+    const config = readJsonFile(file);
+    if (config.mcpServers?.codegraph) {
+      delete config.mcpServers.codegraph;
+      if (Object.keys(config.mcpServers).length === 0) {
+        delete config.mcpServers;
+      }
+      writeJsonFile(file, config);
+      files.push({ path: file, action: 'removed' });
+    } else {
+      files.push({ path: file, action: 'not-found' });
+    }
+
+    return { files };
+  }
+
+  printConfig(loc: Location): string {
+    const target = settingsPath(loc);
+    const snippet = JSON.stringify({ mcpServers: { codegraph: getMcpServerConfig() } }, null, 2);
+    return `# Add to ${target}\n\n${snippet}\n`;
+  }
+
+  describePaths(loc: Location): string[] {
+    return [settingsPath(loc)];
+  }
+}
+
+function writeMcpEntry(loc: Location): WriteResult['files'][number] {
+  const file = settingsPath(loc);
+  const dir = path.dirname(file);
+  if (!fs.existsSync(dir)) fs.mkdirSync(dir, { recursive: true });
+
+  const existing = readJsonFile(file);
+  const before = existing.mcpServers?.codegraph;
+  const after = getMcpServerConfig();
+
+  if (jsonDeepEqual(before, after)) {
+    return { path: file, action: 'unchanged' };
+  }
+  const action: 'created' | 'updated' =
+    before ? 'updated' : (fs.existsSync(file) ? 'updated' : 'created');
+  if (!existing.mcpServers) existing.mcpServers = {};
+  existing.mcpServers.codegraph = after;
+  writeJsonFile(file, existing);
+  return { path: file, action };
+}
+
+export const deepcodeTarget: AgentTarget = new DeepcodeTarget();
diff --git a/src/installer/targets/registry.ts b/src/installer/targets/registry.ts
index 5e929d468..618ade9ce 100644
--- a/src/installer/targets/registry.ts
+++ b/src/installer/targets/registry.ts
@@ -16,6 +16,7 @@ import { hermesTarget } from './hermes';
 import { geminiTarget } from './gemini';
 import { antigravityTarget } from './antigravity';
 import { kiroTarget } from './kiro';
+import { deepcodeTarget } from './deepcode';
 
 export const ALL_TARGETS: readonly AgentTarget[] = Object.freeze([
   claudeTarget,
@@ -26,6 +27,7 @@ export const ALL_TARGETS: readonly AgentTarget[] = Object.freeze([
   geminiTarget,
   antigravityTarget,
   kiroTarget,
+  deepcodeTarget,
 ]);
 
 export function getTarget(id: string): AgentTarget | undefined {
diff --git a/src/installer/targets/types.ts b/src/installer/targets/types.ts
index 833a801ae..823345483 100644
--- a/src/installer/targets/types.ts
+++ b/src/installer/targets/types.ts
@@ -19,7 +19,7 @@ export type Location = 'global' | 'local';
  * lookup. New targets add a value here when they're added to the
  * registry. Keep these short and lowercase.
  */
-export type TargetId = 'claude' | 'cursor' | 'codex' | 'opencode' | 'hermes' | 'gemini' | 'antigravity' | 'kiro';
+export type TargetId = 'claude' | 'cursor' | 'codex' | 'opencode' | 'hermes' | 'gemini' | 'antigravity' | 'kiro' | 'deepcode';
 
 /**
  * Result of `target.detect(location)`.