feat: add instructions for codex

Author: kosmoz

.prettierignore

@@ -1 +1,2 @@
 pnpm-lock.yaml
+CHANGELOG.md

src/lib/generator/codex.ts

@@ -0,0 +1,31 @@
+import { GeneratorOptions, Instructions } from '../types';
+
+export class CodexInstructions implements Instructions {
+  constructor(private readonly options: GeneratorOptions) {}
+
+  getJSON(): unknown {
+    return undefined;
+  }
+
+  getLink(): string | undefined {
+    return undefined;
+  }
+
+  getMarkdown(): string {
+    return `
+#### Manual installation
+
+Requirements:
+- Docker
+
+Add the following to your codex config file (\`~/.codex/config.toml\`):
+
+\`\`\`
+[mcp_servers.${this.options.name}]
+command = "docker"
+args = ["run", "--rm", "-t", "ghcr.io/sparfenyuk/mcp-proxy:v0.3.2-alpine", "${this.options.url}", "--transport=streamablehttp"]
+\`\`\`
+
+**Note:** Codex does not support MCP servers with OAuth2 authentication.`;
+  }
+}

src/lib/generator/index.ts

@@ -7,6 +7,7 @@ import { VscodeInstructions } from './vscode';
 import { WindsurfInstructions } from './windsurf';
 import { ChatGPTInstructions } from './chatgpt';
 import { GeminiCLIInstructions } from './gemini_cli';
+import { CodexInstructions } from './codex';
 
 export const generators: Record<
   Target,
@@ -19,4 +20,5 @@ export const generators: Record<
   windsurf: (options) => new WindsurfInstructions(options),
   chatgpt: (options) => new ChatGPTInstructions(options),
   'gemini-cli': (options) => new GeminiCLIInstructions(options),
+  codex: (options) => new CodexInstructions(options),
 };

src/lib/target.ts

@@ -6,6 +6,7 @@ export const targets = [
   'windsurf',
   'chatgpt',
   'gemini-cli',
+  'codex',
 ] as const;
 
 export type Target = (typeof targets)[number];
@@ -18,6 +19,7 @@ const targetNames = [
   'Windsurf',
   'ChatGPT',
   'Gemini CLI',
+  'Codex',
 ] as const;
 
 export function getTargetName(target: Target): string {