diff --git a/.woodpecker/ci.yml b/.woodpecker/ci.yml
index 3bcf79b..21af84c 100644
--- a/.woodpecker/ci.yml
+++ b/.woodpecker/ci.yml
@@ -1,22 +1,25 @@
 variables:
   - &node_image 'node:22-alpine'
-  - &install_deps |
-    corepack enable
-    pnpm install --frozen-lockfile
+  - &enable_pnpm 'corepack enable'
 
 when:
   - event: [push, pull_request, manual]
 
+# Steps run sequentially to avoid OOM on the CI runner.
+# node_modules is installed once by the install step and shared across
+# all subsequent steps via Woodpecker's shared workspace volume.
+
 steps:
   install:
     image: *node_image
     commands:
-      - *install_deps
+      - corepack enable
+      - pnpm install --frozen-lockfile
 
   typecheck:
     image: *node_image
     commands:
-      - *install_deps
+      - *enable_pnpm
       - pnpm typecheck
     depends_on:
       - install
@@ -24,34 +27,31 @@ steps:
   lint:
     image: *node_image
     commands:
-      - *install_deps
+      - *enable_pnpm
       - pnpm lint
     depends_on:
-      - install
+      - typecheck
 
   format:
     image: *node_image
     commands:
-      - *install_deps
+      - *enable_pnpm
       - pnpm format:check
     depends_on:
-      - install
+      - lint
 
   test:
     image: *node_image
     commands:
-      - *install_deps
+      - *enable_pnpm
       - pnpm test
     depends_on:
-      - install
+      - format
 
   build:
     image: *node_image
     commands:
-      - *install_deps
+      - *enable_pnpm
       - pnpm build
     depends_on:
-      - typecheck
-      - lint
-      - format
       - test