[lib] add Grok support

README.md

@@ -43,6 +43,7 @@ Officially supported coding agents:
 | [Devin](https://devin.ai/)                                        | `devin`       | 🚫         |
 | [Gemini CLI](https://github.com/google-gemini/gemini-cli)         | `gemini`      | 🚫         |
 | [GitHub Copilot CLI](https://github.com/github/copilot-cli)       | `copilot`     | ✅         |
+| [Grok](https://x.ai/build)                                        | `grok`        | ✅         |
 | [Kilo Code](https://kilocode.ai/)                                 | `kilocode`    | ✅         |
 | [Kiro](https://kiro.dev/)                                         | `kiro`        | ✅         |
 | [Muse Code][muse-code]                                            | `muse`        | 🚫         |
@@ -101,7 +102,8 @@ A string containing the agent's session identifier, normalized from
 agent-specific environment variables such as `CODEX_THREAD_ID`,
 `CURSOR_CONVERSATION_ID`, `CLAUDE_CODE_SESSION_ID`,
 `ANTIGRAVITY_TRAJECTORY_ID`, `KIRO_SESSION_ID`, `KILO_RUN_ID`, and
-`COPILOT_AGENT_SESSION_ID`, and `REPLIT_SESSION`. Omitted when the agent doesn't expose one
+`COPILOT_AGENT_SESSION_ID`, `REPLIT_SESSION`, and `GROK_SESSION_ID`.
+Omitted when the agent doesn't expose one
 (see the Session ID column in the support table above).
 
 ### `isRunningFromAgent([options])`

package.json

@@ -1,6 +1,6 @@
 {
   "name": "agent-cli-detector",
-  "version": "0.1.6",
+  "version": "0.1.7",
   "description": "Detect whether a JavaScript CLI is running inside a coding agent.",
   "type": "module",
   "sideEffects": false,

src/agents.ts

@@ -52,6 +52,15 @@ export const defaultAgents = [
     env: [{ name: "GEMINI_CLI", value: "1" }],
     process: [{ pattern: /^gemini$/i }]
   },
+  {
+    id: "grok",
+    name: "Grok",
+    env: [
+      { name: "GROK_AGENT", value: "1" },
+      { name: "GROK_SESSION_ID" }
+    ],
+    sessionEnv: ["GROK_SESSION_ID"]
+  },
   {
     id: "antigravity",
     name: "Antigravity",

src/types.ts

@@ -7,6 +7,7 @@ export type AgentId =
   | "cursor"
   | "devin"
   | "gemini"
+  | "grok"
   | "kiro"
   | "kilocode"
   | "claude-code"

test/detector.test.mjs

@@ -64,6 +64,22 @@ test("detects replit and normalizes its session id", () => {
   });
 });
 
+test("detects grok and normalizes its session id", () => {
+  const result = detectAgent({
+    env: {
+      GROK_AGENT: "1",
+      GROK_SESSION_ID: "01a035a8-166c-7771-8e5e-f67e0dd98c83"
+    }
+  });
+
+  assert.equal(result.detected, true);
+  assert.deepEqual(result.agent, {
+    id: "grok",
+    name: "Grok",
+    sessionId: "01a035a8-166c-7771-8e5e-f67e0dd98c83"
+  });
+});
+
 test("detects rork from RORK_API_URL", () => {
   const result = detectAgent({
     env: {