diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..cc1944dc
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,25 @@
+# Runs `devenv sync` to install `uv`, `yarn install`, and installs the `pre-commit` hook.
+
+if [[ -x "${PWD}/.devenv/bin/devenv" ]]; then
+    DEVENV="${PWD}/.devenv/bin/devenv"
+elif command -v devenv >/dev/null 2>&1; then
+    DEVENV="devenv"
+fi
+
+if [[ -n "$DEVENV" ]]; then
+    $DEVENV sync
+    PATH_add "${PWD}/.devenv/bin"
+fi
+
+if ! command -v uv >/dev/null 2>&1; then
+    echo "ERROR: Please install devenv (https://github.com/getsentry/devenv) or uv (https://docs.astral.sh/uv/)"
+    return 1
+fi
+
+if [ ! -d "node_modules" ]; then
+    yarn install
+fi
+
+if command -v uvx >/dev/null 2>&1 && [ ! -f ".git/hooks/pre-commit" ]; then
+    uvx pre-commit@latest install
+fi
diff --git a/.gitignore b/.gitignore
index 868f4471..013db6fd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -146,4 +146,7 @@ dist
 # Turborepo
 .turbo
 
-.DS_Store
\ No newline at end of file
+.DS_Store
+
+# Devenv
+**/__pycache__
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 00000000..7d0898a9
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,15 @@
+repos:
+  - repo: local
+    hooks:
+      - id: format
+        name: format
+        description: yarn format
+        entry: yarn format
+        language: system
+        pass_filenames: false
+      - id: lint
+        name: lint
+        description: yarn lint
+        entry: yarn lint
+        language: system
+        pass_filenames: false
diff --git a/biome.json b/biome.json
index 9f8e97d0..a466299f 100644
--- a/biome.json
+++ b/biome.json
@@ -3,7 +3,7 @@
   "vcs": { "enabled": false, "clientKind": "git", "useIgnoreFile": false },
   "files": {
     "ignoreUnknown": false,
-    "ignore": ["dist/*", "javascript/sentry-conventions/package.json", "rust/*", "python/*"]
+    "ignore": [".devenv/*", "dist/*", "javascript/sentry-conventions/package.json", "rust/*", "python/*"]
   },
   "formatter": {
     "enabled": true,
diff --git a/devenv/config.ini b/devenv/config.ini
new file mode 100644
index 00000000..9c6d4725
--- /dev/null
+++ b/devenv/config.ini
@@ -0,0 +1,21 @@
+[devenv]
+minimum_version = 1.22.0
+
+[uv]
+darwin_arm64 = https://github.com/astral-sh/uv/releases/download/0.9.3/uv-aarch64-apple-darwin.tar.gz
+darwin_arm64_sha256 = d6b2eaa1025b24b4779602763ad92f20112cbf19732fc6e0c72bb57a6a592c6c
+# used for autoupdate
+version = 0.9.3
+
+[node]
+darwin_x86_64 = https://storage.googleapis.com/sentry-dev-infra-assets/node/node-v22.16.0-darwin-x64.tar.xz
+darwin_x86_64_sha256 = 5c34638f2c0e3f3aaa7b3a94b58304765a169730da1896ebba8515ea4d987a9c
+darwin_arm64 = https://storage.googleapis.com/sentry-dev-infra-assets/node/node-v22.16.0-darwin-arm64.tar.xz
+darwin_arm64_sha256 = aaf7fc3c936f1b359bc312b63638e41f258689ac2303966ad932cda18c54ea00
+linux_x86_64 = https://storage.googleapis.com/sentry-dev-infra-assets/node/node-v22.16.0-linux-x64.tar.xz
+linux_x86_64_sha256 = f4cb75bb036f0d0eddf6b79d9596df1aaab9ddccd6a20bf489be5abe9467e84e
+# used for autoupdate
+version = v22.16.0
+
+[yarn]
+version = 1.22.22
diff --git a/devenv/sync.py b/devenv/sync.py
new file mode 100644
index 00000000..989ae963
--- /dev/null
+++ b/devenv/sync.py
@@ -0,0 +1,25 @@
+from devenv import constants
+from devenv.lib import config, node, uv
+
+
+def main(context: dict[str, str]) -> int:
+    reporoot = context["reporoot"]
+    cfg = config.get_repo(reporoot)
+
+    uv.install(
+        cfg["uv"]["version"],
+        cfg["uv"][constants.SYSTEM_MACHINE],
+        cfg["uv"][f"{constants.SYSTEM_MACHINE}_sha256"],
+        reporoot,
+    )
+
+    node.install(
+        cfg["node"]["version"],
+        cfg["node"][constants.SYSTEM_MACHINE],
+        cfg["node"][f"{constants.SYSTEM_MACHINE}_sha256"],
+        reporoot,
+    )
+
+    node.install_yarn(cfg["yarn"]["version"], reporoot)
+
+    return 0