diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index 9ba2dd55..87beb526 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -19,10 +19,10 @@ jobs:
         with:
           python-version: '3.10'
 
-      - name: Install dependencies
+      - name: Install pre-commit
         run: |
           python -m pip install --upgrade pip
-          pip install .[dev]
+          pip install pre-commit
 
       - name: Run pre-commit (no fix)
         run: |
diff --git a/AGENTS.md b/AGENTS.md
index 6d430970..1aaceeea 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -48,6 +48,9 @@ This file defines how coding agents should work in this repository.
 - Build metadata should list directly used third-party distributions; do not
   rely on transitive dependencies, and do not add Python stdlib modules such as
   `argparse` as build/runtime dependencies.
+- Pre-commit CI should install only the `pre-commit` runner; hooks provision
+  their own tool environments, so do not install KeepGPU runtime dependencies
+  just to lint.
 - Source distributions should not ship the test suite by default; package data
   should enumerate required runtime assets such as the MCP dashboard files.
 - Keep license metadata as a plain SPDX string and keep the advertised Python
diff --git a/docs/contributing.md b/docs/contributing.md
index 98ecca71..1521607e 100644
--- a/docs/contributing.md
+++ b/docs/contributing.md
@@ -55,6 +55,9 @@ expectations so you can get productive quickly and avoid surprises in CI.
   intentionally not part of the repository.
 - Keep Ruff settings in `pyproject.toml`; do not add a standalone `ruff.toml`
   unless the full configuration is intentionally migrated there.
+- Keep pre-commit CI lean: install the `pre-commit` runner only, and let hooks
+  provision their own tool environments instead of installing KeepGPU runtime
+  dependencies.
 - Keep build metadata lean: list directly used third-party build/runtime
   distributions, do not rely on transitive dependencies, and do not list
   Python standard library modules such as `argparse`.
diff --git a/tests/test_ci_workflows.py b/tests/test_ci_workflows.py
new file mode 100644
index 00000000..82f2efc7
--- /dev/null
+++ b/tests/test_ci_workflows.py
@@ -0,0 +1,22 @@
+import re
+from pathlib import Path
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_precommit_workflow_does_not_install_runtime_package():
+    workflow_path = PROJECT_ROOT / ".github/workflows/pre-commit.yaml"
+    if not workflow_path.exists():
+        workflow_path = PROJECT_ROOT / ".github/workflows/pre-commit.yml"
+    workflow = workflow_path.read_text(encoding="utf-8")
+    pip_install_commands = re.findall(
+        r"^\s*(?:python\s+-m\s+)?pip\s+install\b.*$", workflow, re.MULTILINE
+    )
+    normalized_commands = [
+        re.sub(r"\s+", " ", command.strip()) for command in pip_install_commands
+    ]
+
+    assert normalized_commands == [
+        "python -m pip install --upgrade pip",
+        "pip install pre-commit",
+    ]