diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01a8821..3a9fc28 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ All notable changes to aidc are tracked here. Format follows [Keep a Changelog](
 
 ### Added
 
+- **Grok Build agent.** `aidc grok` launches xAI's Grok Build CLI inside the container, with a `grok_home` named volume (`~/.grok`), a read-only `/host-seed/grok` seed mount, `sync_grok` seeding in `bootstrap-state.sh`, and `aidc sync-config`/`sync-sessions` support. Grok reads the same generated `AGENTS.md`.
 - **GPL-3.0 license.** `LICENSE` at repo root.
 - **Vulnerability disclosure policy.** `SECURITY.md` documents scope, reporting channels, and timelines.
 - **Shellcheck CI.** `.github/workflows/shellcheck.yml` lints `bin/aidc`, `install.sh`, `lib/aidc.sh`, and `templates/**/*.sh`, plus syntax-checks the Python clipboard server.
@@ -22,6 +23,8 @@ All notable changes to aidc are tracked here. Format follows [Keep a Changelog](
 
 ### Changed
 
+- **Coding agents now install as native prebuilt binaries.** `claude`, `codex`, and `opencode` switched from a root `npm install -g` to each vendor's native `curl | sh` installer (into `~/.local/bin`), dropping the Node runtime dependency for the agents and shrinking the npm supply-chain surface. Removes the only build step that ran package-manager installs *before* `pmg setup install`.
+- **pmg wired in before any user-level install.** `pmg setup install` is now the first `USER vscode` build step. Interception is documented as riding on the `~/.pmg/bin` PATH shims (first on `ENV PATH`) rather than the rc-file aliases pmg also writes — build `RUN` steps and exec'd agents never source rc files. `docs/security.md` now describes the shared-credentials seed-mount/env-passthrough matrix.
 - **Pinned `gitleaks` and `vet` versions** in `templates/devcontainer/Dockerfile.tmpl` (`v8.30.1` and `v1.17.3` respectively). Defaults were `latest`, which resolved at build time and defeated the surrounding base-image SHA pin. Repin instructions are in the Dockerfile.
 - **README** and the docs/ tree brought into sync with the above. README's command list includes `aidc status`, `aidc down`, `aidc destroy`, `aidc exec`, and `aidc sync-sessions`. `docs/security.md` covers the scanners, supply-chain guardrails, and egress firewall; `docs/claude-profiles.md` covers the local-model profiles (`localhost.env.example`, `localnetwork.env.example`).
 
diff --git a/README.md b/README.md
index e2c7f22..0d6e4d5 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 [![Status: alpha](https://img.shields.io/badge/status-alpha-orange.svg)](#status)
 [![macOS only](https://img.shields.io/badge/platform-macOS-lightgrey.svg)](#prereqs)
 
-**aidc** — short for **AI Dev Container** — is a one-command devcontainer wrapper for AI coding agents (`claude`, `codex`, `opencode`, `cursor-agent`). It scaffolds a hardened Linux container per repo, mounts your code at `/workspace`, persists agent state in named Docker volumes (so agents don't read your `~/.ssh` or your shell history), and bakes in always-on security scanners and supply-chain guardrails.
+**aidc** — short for **AI Dev Container** — is a one-command devcontainer wrapper for AI coding agents (`claude`, `codex`, `opencode`, `grok`, `cursor-agent`). It scaffolds a hardened Linux container per repo, mounts your code at `/workspace`, persists agent state in named Docker volumes (so agents don't read your `~/.ssh` or your shell history), and bakes in always-on security scanners and supply-chain guardrails.
 
 If you're already running these agents directly on your Mac and have been quietly nervous about it, this is for you.
 
@@ -37,12 +37,13 @@ aidc init          # one-time scaffold; writes .devcontainer/, .ai-container/, C
 aidc claude        # auto-runs `aidc up` if needed, then drops you into Claude Code in the container
 ```
 
-Tool commands (`aidc claude` / `codex` / `opencode` / `cursor-agent`) auto-bootstrap the container on first run.
+Tool commands (`aidc claude` / `codex` / `opencode` / `grok` / `cursor-agent`) auto-bootstrap the container on first run.
 
 ## What aidc actually does
 
 - creates local-only `.devcontainer/`, `.ai-container/`, `CLAUDE.md`, `AGENTS.md`, and `.cursor/rules/00-core-logics.mdc`
 - mounts project code only at `/workspace`; overlays `/workspace/.devcontainer` read-only inside the container
+- installs the coding agents (`claude`, `codex`, `opencode`, `grok`) as native prebuilt binaries — no npm-global, no Node runtime dependency for the agents themselves
 - persists tool state in per-repo Docker volumes instead of mounting whole host homes
 - seeds selected config from host read-only mounts on first startup
 - creates one `CORE_LOGICS` git worktree per repo and mounts it at `/opt/CORE_LOGICS` for shared cross-repo notes
@@ -75,11 +76,12 @@ aidc exec -- <command>...
 aidc claude [--profile NAME] [--provider NAME] [--list-profiles] [-- ...]
 aidc codex [-- ...]
 aidc opencode [-- ...]
+aidc grok [-- ...]
 aidc cursor-agent [-- ...]
 aidc cursor
 aidc sync-claude-aliases
-aidc sync-config <claude|codex|opencode|all>
-aidc sync-sessions [claude|codex|opencode|all]
+aidc sync-config <claude|codex|opencode|grok|all>
+aidc sync-sessions [claude|codex|opencode|grok|all]
 ```
 
 `aidc status` shows the container + mounts/config for the current folder. `--global` lists every aidc container on the host with disk/CPU/memory and a totals line.
diff --git a/docs/install.md b/docs/install.md
index 80954d1..3af50f5 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -36,6 +36,7 @@ aidc up            # build + start container
 | `aidc claude --profile <name>` | start Claude against a host-defined profile |
 | `aidc codex` | start OpenAI Codex |
 | `aidc opencode` | start OpenCode |
+| `aidc grok` | start Grok Build |
 | `aidc cursor-agent` | start Cursor Agent |
 | `aidc cursor` | open host Cursor on the repo |
 | `aidc status` | container + config/mounts status for this folder |
@@ -53,8 +54,9 @@ aidc up            # build + start container
 /home/vscode/.claude             Claude state (named volume)
 /home/vscode/.codex              Codex state (named volume)
 /home/vscode/.config/opencode    OpenCode state (named volume)
+/home/vscode/.grok               Grok state (named volume)
 /commandhistory                  bash + zsh history (named volume)
-/host-seed/{claude,codex,opencode,gitconfig}   read-only host seeds
+/host-seed/{claude,codex,opencode,grok,gitconfig}   read-only host seeds
 ```
 
 `GIT_CONFIG_GLOBAL=/home/vscode/.gitconfig.local` — host gitconfig is seed-only, in-container `git config --global` writes land in the overlay (ephemeral across rebuilds).
@@ -100,7 +102,7 @@ sudo apt-get install -y --no-install-recommends golang-go
 go install golang.org/x/tools/gopls@latest
 ```
 
-Runs as `vscode` at image build time, with passwordless `sudo` available for system packages. The `COPY` is the last layer in the Dockerfile, so edits invalidate **only** the project-setup layer — the heavy base layers (apt, uv/Python, npm globals, pmg/vet/gryph/rtk) stay cached.
+Runs as `vscode` at image build time, with passwordless `sudo` available for system packages. The `COPY` is the last layer in the Dockerfile, so edits invalidate **only** the project-setup layer — the heavy base layers (apt, uv/Python, native agent binaries, pmg/vet/gryph/rtk) stay cached.
 
 After editing, `aidc rebuild` (or just `aidc up` — `--build` is implicit) picks up the change.
 
diff --git a/docs/security.md b/docs/security.md
index c39dd2d..76eed8f 100644
--- a/docs/security.md
+++ b/docs/security.md
@@ -41,12 +41,45 @@ The scaffold writes a "Security guardrails (non-negotiable)" block into `CLAUDE.
 
 ## Supply-chain guardrails (always on)
 
-The container ships with SafeDep's [`pmg`](https://github.com/safedep/pmg) and [`vet`](https://github.com/safedep/vet) baked in. `pmg setup install` runs at image build, so `~/.pmg/bin` is first on `PATH` and intercepts `npm`, `pnpm`, `yarn`, `bun`, `npx`, `pnpx`, `pip`, `pip3`, `uv`, and `poetry` — including subprocess calls from agents (Claude, Codex, OpenCode, Cursor Agent). Malicious packages are blocked before install.
+The container ships with SafeDep's [`pmg`](https://github.com/safedep/pmg) and [`vet`](https://github.com/safedep/vet) baked in. `pmg setup install` runs at image build **before any user-level package install**, and interception rides on the `~/.pmg/bin` PATH shims — which are first on the image `ENV PATH` for both build and runtime. It is deliberately **not** dependent on the shell aliases pmg also writes to `~/.zshrc`/`~/.bashrc`: Docker build `RUN` steps and exec'd agent subprocesses never source rc files, so only the PATH shims reliably gate package managers. The shims intercept `npm`, `pnpm`, `yarn`, `bun`, `npx`, `pnpx`, `pip`, `pip3`, `uv`, and `poetry` — including subprocess calls from agents (Claude, Codex, OpenCode, Grok, Cursor Agent). Malicious packages are blocked before install.
 
-Run scans by hand with `aidc exec -- vet scan -D /workspace`. Re-run `pmg setup doctor` inside the container to verify wiring (`aidc exec -- pmg setup doctor`).
+The coding agents themselves are installed as **native prebuilt binaries** (via each vendor's `curl | sh` installer), not `npm install -g`, so there is no agent-install step for pmg to vet and no Node runtime dependency for the agents. The `NPM_CONFIG_*` hardening in the image still governs any npm the agents or project toolchains invoke at runtime, which the pmg shims gate.
+
+Run scans by hand with `aidc exec -- vet scan -D /workspace`. Re-run `pmg setup doctor` inside the container to verify wiring (`aidc exec -- pmg setup doctor`). To confirm interception is alias-independent, check that the shim wins without sourcing rc files: `aidc exec -- bash -c 'command -v npm'` should resolve under `~/.pmg/bin`.
 
 If the egress firewall is enabled, the allowlist already includes `api.safedep.io`, `vetpkg.dev`, `osv.dev`, and `semgrep.dev`.
 
+## Sharing credentials with the agents
+
+aidc never mounts your whole host home into the container. Instead each agent's
+config/auth is shared two ways, both scoped to that agent:
+
+**1. Read-only seed mounts (the default path).** On first startup
+`bootstrap-state.sh init` copies selected files from host config dirs (mounted
+read-only at `/host-seed/<tool>`) into the agent's per-repo volume:
+
+| Agent | Host source | Container volume | Seeded by |
+|---|---|---|---|
+| Claude | `~/.claude` | `~/.claude` | `settings.json`, `CLAUDE.md` |
+| Codex | `~/.codex` | `~/.codex` | `auth.json`, `config.toml`, `AGENTS.md`, `rules/`, `skills/` |
+| OpenCode | `~/.config/opencode` | `~/.config/opencode` | `opencode.json`, `plugins/` |
+| Grok | `~/.grok` | `~/.grok` | `config.toml` / `user-settings.json` / `auth.json` (whichever exists) |
+
+Re-sync after changing host config with `aidc sync-config <claude|codex|opencode|grok|all>`.
+Because the seed is read-only and only specific files are copied, the agents
+reuse your existing logins without the container being able to write back to the
+host. After interactive login *inside* the container, credentials persist in the
+named volume across restarts (and are wiped by `aidc destroy`).
+
+**2. Environment-variable passthrough.** For headless/API-key auth, `aidc`
+forwards a fixed set of host env vars into the agent process when present:
+`ANTHROPIC_API_KEY`, `CLAUDE_CODE_OAUTH_TOKEN`, `OPENAI_API_KEY`,
+`CURSOR_API_KEY`, `OPENROUTER_API_KEY`, `OPENAI_BASE_URL`. OpenCode and Grok can
+both speak to multiple providers, so these shared keys let all the agents reuse
+the same host credentials. For xAI specifically, either log in interactively
+(persisted in `~/.grok`) or export the xAI key on the host and add it to the
+passthrough list in `AIDC_PASSTHROUGH_ENV_KEYS` (`lib/aidc.sh`) before launching.
+
 ## Agent guardrails: gryph + rtk
 
 The image also ships [`gryph`](https://github.com/safedep/gryph) (SafeDep's agent security layer — patches hook entries into the detected agents' settings) and [`rtk`](https://github.com/rtk-ai/rtk) (Rust Token Killer — token-saving CLI proxy that rewrites commands like `git status` → `rtk git status` via the Claude Code hook).
diff --git a/lib/aidc.sh b/lib/aidc.sh
index c0dc646..1103e39 100644
--- a/lib/aidc.sh
+++ b/lib/aidc.sh
@@ -81,6 +81,9 @@ aidc::main() {
     opencode)
       aidc::cmd_opencode "$@"
       ;;
+    grok)
+      aidc::cmd_grok "$@"
+      ;;
     cursor-agent)
       aidc::cmd_cursor_agent "$@"
       ;;
@@ -121,11 +124,12 @@ Usage:
   aidc claude [--profile NAME] [--provider NAME] [--list-profiles] [-- ...]
   aidc codex [-- ...]
   aidc opencode [-- ...]
+  aidc grok [-- ...]
   aidc cursor-agent [-- ...]
   aidc cursor
   aidc sync-claude-aliases
-  aidc sync-config <claude|codex|opencode|all>
-  aidc sync-sessions [claude|codex|opencode|all]
+  aidc sync-config <claude|codex|opencode|grok|all>
+  aidc sync-sessions [claude|codex|opencode|grok|all]
 
 Notes:
   - Run commands from the repo root you want to isolate.
@@ -385,6 +389,7 @@ aidc::status_config() {
   aidc::status_mount_row "/host-seed/claude" "$AIDC_HOST_SEED_CLAUDE" "$c_dim" "$c_rst"
   aidc::status_mount_row "/host-seed/codex" "$AIDC_HOST_SEED_CODEX" "$c_dim" "$c_rst"
   aidc::status_mount_row "/host-seed/opencode" "$AIDC_HOST_SEED_OPENCODE" "$c_dim" "$c_rst"
+  aidc::status_mount_row "/host-seed/grok" "$AIDC_HOST_SEED_GROK" "$c_dim" "$c_rst"
   aidc::status_mount_row "/host-seed/gitconfig" "$AIDC_GITCONFIG_SOURCE" "$c_dim" "$c_rst"
   aidc::status_mount_row "/host-clipboard" "$AIDC_CLIPBOARD_DIR_SOURCE" "$c_dim" "$c_rst"
 
@@ -689,6 +694,10 @@ aidc::cmd_opencode() {
   aidc::run_tool "opencode" "" "$@"
 }
 
+aidc::cmd_grok() {
+  aidc::run_tool "grok" "" "$@"
+}
+
 aidc::cmd_cursor_agent() {
   aidc::run_tool "cursor-agent" "" "$@"
 }
@@ -713,7 +722,7 @@ aidc::cmd_sync_config() {
   local workspace
   workspace="$(aidc::default_workspace)"
   local tool="${1:-}"
-  [[ -n "$tool" ]] || aidc::die "usage: aidc sync-config <claude|codex|opencode|all>"
+  [[ -n "$tool" ]] || aidc::die "usage: aidc sync-config <claude|codex|opencode|grok|all>"
   aidc::ensure_container_running "$workspace"
   aidc::compose "$workspace" exec workspace /workspace/.devcontainer/scripts/bootstrap-state.sh sync "$tool"
   aidc::log "synced $tool config into the container volume"
@@ -726,14 +735,15 @@ aidc::cmd_sync_sessions() {
   aidc::ensure_container_running "$workspace"
 
   case "$tool" in
-    claude|codex|opencode|all) ;;
-    *) aidc::die "usage: aidc sync-sessions [claude|codex|opencode|all]" ;;
+    claude|codex|opencode|grok|all) ;;
+    *) aidc::die "usage: aidc sync-sessions [claude|codex|opencode|grok|all]" ;;
   esac
 
   if [[ "$tool" == "all" ]]; then
     aidc::sync_session_tool "$workspace" claude
     aidc::sync_session_tool "$workspace" codex
     aidc::sync_session_tool "$workspace" opencode
+    aidc::sync_session_tool "$workspace" grok
   else
     aidc::sync_session_tool "$workspace" "$tool"
   fi
@@ -757,6 +767,10 @@ aidc::sync_session_tool() {
       container_src="/home/vscode/.config/opencode/projects"
       host_dst="$HOME/.config/opencode/projects"
       ;;
+    grok)
+      container_src="/home/vscode/.grok/sessions"
+      host_dst="$HOME/.grok/sessions"
+      ;;
     *)
       aidc::die "unknown session tool: $tool"
       ;;
@@ -804,6 +818,12 @@ aidc::run_tool() {
     opencode)
       command=("opencode")
       ;;
+    grok)
+      # The container is already the isolation boundary; grok runs unsandboxed
+      # like the other agents. Grok Build has operating modes (e.g. plan/auto);
+      # append the full-autonomy mode flag here once confirmed against the CLI.
+      command=("grok")
+      ;;
     cursor-agent)
       command=("cursor-agent" "--sandbox" "disabled" "-f")
       ;;
@@ -1510,7 +1530,7 @@ aidc::ensure_core_worktree() {
 
 aidc::ensure_host_config_dirs() {
   mkdir -p "$AIDC_HOST_CONFIG_ROOT" "$AIDC_EMPTY_ROOT" "$AIDC_CLAUDE_PROFILE_ROOT"
-  mkdir -p "$AIDC_EMPTY_ROOT/claude" "$AIDC_EMPTY_ROOT/codex" "$AIDC_EMPTY_ROOT/opencode" "$AIDC_EMPTY_ROOT/clipboard"
+  mkdir -p "$AIDC_EMPTY_ROOT/claude" "$AIDC_EMPTY_ROOT/codex" "$AIDC_EMPTY_ROOT/opencode" "$AIDC_EMPTY_ROOT/grok" "$AIDC_EMPTY_ROOT/clipboard"
   touch "$AIDC_EMPTY_ROOT/gitconfig"
 }
 
@@ -1609,6 +1629,8 @@ aidc::export_compose_env() {
   AIDC_HOST_SEED_CODEX="$(aidc::mount_dir_or_empty "$HOME/.codex" "codex")"
   export AIDC_HOST_SEED_OPENCODE
   AIDC_HOST_SEED_OPENCODE="$(aidc::mount_dir_or_empty "$HOME/.config/opencode" "opencode")"
+  export AIDC_HOST_SEED_GROK
+  AIDC_HOST_SEED_GROK="$(aidc::mount_dir_or_empty "$HOME/.grok" "grok")"
   export AIDC_GITCONFIG_SOURCE
   AIDC_GITCONFIG_SOURCE="$(aidc::mount_file_or_empty "$HOME/.gitconfig" "gitconfig")"
   # Host-clipboard bridge is opt-in (off by default). When disabled, mount an
diff --git a/templates/devcontainer/Dockerfile.tmpl b/templates/devcontainer/Dockerfile.tmpl
index f806256..c47f458 100644
--- a/templates/devcontainer/Dockerfile.tmpl
+++ b/templates/devcontainer/Dockerfile.tmpl
@@ -68,8 +68,10 @@ ENV NPM_CONFIG_IGNORE_SCRIPTS=true \
     PIP_DISABLE_PIP_VERSION_CHECK=1 \
     NODE_OPTIONS=--max-old-space-size=4096
 
-RUN npm_config_ignore_scripts=false npm install -g @anthropic-ai/claude-code @openai/codex opencode-ai@latest \
-    && npm cache clean --force
+# Coding agents are installed as native prebuilt binaries per-user below (no
+# npm-global, no Node runtime dependency for the agents themselves). The
+# NPM_CONFIG_* hardening above still governs any npm the agents or project
+# toolchains invoke at runtime.
 
 # Supply-chain guardrails: pmg intercepts npm/pip/uv/etc. and runs vet checks
 # before installs. Binaries installed system-wide; shell/shim wiring done
@@ -187,18 +189,34 @@ RUN chmod 0755 /usr/local/bin/aidc-bootstrap-claude
 USER vscode
 
 ENV HOME=/home/vscode
+# ~/.pmg/bin is FIRST on PATH on purpose. pmg interception rides on these PATH
+# shims, NOT on the shell aliases pmg also writes to ~/.zshrc/~/.bashrc: build
+# RUN steps and exec'd agent subprocesses never source rc files, so only the
+# shims (first on PATH at build and runtime) reliably gate npm/pip/uv/etc.
 ENV PATH=/home/vscode/.pmg/bin:/home/vscode/.local/bin:/usr/local/bin:/usr/bin:/bin
 
+# Wire pmg in before ANY user-level package install so nothing slips past it.
+RUN pmg setup install \
+    && pmg setup doctor || true
+
+# Coding agents as native prebuilt binaries. Each installer drops a binary into
+# ~/.local/bin (already on PATH) via plain curl — no npm dependency resolution,
+# so pmg has nothing to vet here; the "pmg first" invariant above still holds.
+# Grok's binary is forced into ~/.local/bin via GROK_BIN_DIR so the grok_home
+# volume mounted at ~/.grok at runtime cannot shadow it.
 RUN mkdir -p \
       /home/vscode/.local/bin \
       /home/vscode/.claude \
       /home/vscode/.codex \
       /home/vscode/.config/opencode \
       /home/vscode/.cursor-agent \
+      /home/vscode/.grok \
+    && curl -fsSL https://claude.ai/install.sh | bash \
+    && curl -fsSL https://chatgpt.com/codex/install.sh | sh \
+    && curl -fsSL https://opencode.ai/install | bash -s -- --no-modify-path \
     && curl -fsS https://cursor.com/install | bash \
     && { cursor-agent --version || true; } \
-    && pmg setup install \
-    && pmg setup doctor || true
+    && curl -fsSL https://x.ai/cli/install.sh | GROK_BIN_DIR=/home/vscode/.local/bin bash
 
 # Auto-detected toolchains. aidc fills AIDC_TOOLCHAINS by scanning the
 # workspace for marker files (go.mod, Cargo.toml, etc.). Override per repo
diff --git a/templates/devcontainer/compose.yaml.tmpl b/templates/devcontainer/compose.yaml.tmpl
index 458fd05..cc520fe 100644
--- a/templates/devcontainer/compose.yaml.tmpl
+++ b/templates/devcontainer/compose.yaml.tmpl
@@ -49,6 +49,10 @@ services:
         source: ${AIDC_HOST_SEED_OPENCODE}
         target: /host-seed/opencode
         read_only: true
+      - type: bind
+        source: ${AIDC_HOST_SEED_GROK}
+        target: /host-seed/grok
+        read_only: true
       - type: bind
         source: ${AIDC_GITCONFIG_SOURCE}
         target: /host-seed/gitconfig
@@ -72,6 +76,9 @@ services:
       - type: volume
         source: cursor_agent_home
         target: /home/vscode/.cursor-agent
+      - type: volume
+        source: grok_home
+        target: /home/vscode/.grok
 
 volumes:
   command_history:
@@ -79,3 +86,4 @@ volumes:
   codex_home:
   opencode_home:
   cursor_agent_home:
+  grok_home:
diff --git a/templates/devcontainer/scripts/bootstrap-state.sh.tmpl b/templates/devcontainer/scripts/bootstrap-state.sh.tmpl
index 437c733..1005809 100644
--- a/templates/devcontainer/scripts/bootstrap-state.sh.tmpl
+++ b/templates/devcontainer/scripts/bootstrap-state.sh.tmpl
@@ -66,6 +66,16 @@ sync_opencode() {
   copy_dir_from_seed "/host-seed/opencode/plugins" "$home_dir/.config/opencode/plugins"
 }
 
+sync_grok() {
+  ensure_dir "$home_dir/.grok"
+  # Grok stores config + credentials under ~/.grok. Filenames differ across
+  # builds (config.toml / user-settings.json / an auth file), so copy whichever
+  # the host provides — copy_file_from_seed is a no-op when the source is absent.
+  copy_file_from_seed "/host-seed/grok/config.toml" "$home_dir/.grok/config.toml" "0600"
+  copy_file_from_seed "/host-seed/grok/user-settings.json" "$home_dir/.grok/user-settings.json" "0600"
+  copy_file_from_seed "/host-seed/grok/auth.json" "$home_dir/.grok/auth.json" "0600"
+}
+
 sync_gitconfig_overlay() {
   local overlay="$home_dir/.gitconfig.local"
   if [[ ! -f "$overlay" && -f /host-seed/gitconfig ]]; then
@@ -132,10 +142,14 @@ sync_tool() {
     opencode)
       sync_opencode
       ;;
+    grok)
+      sync_grok
+      ;;
     all)
       sync_claude
       sync_codex
       sync_opencode
+      sync_grok
       ;;
     *)
       echo "unsupported tool: $1" >&2
@@ -157,7 +171,7 @@ case "$mode" in
     sync_tool "$tool"
     ;;
   *)
-    echo "usage: bootstrap-state.sh [init|sync] [claude|codex|opencode|all]" >&2
+    echo "usage: bootstrap-state.sh [init|sync] [claude|codex|opencode|grok|all]" >&2
     exit 1
     ;;
 esac