split · split · Mar 31, 2026 · Mar 30, 2026 · Mar 31, 2026 · Mar 31, 2026
diff --git a/README.md b/README.md
@@ -3,6 +3,8 @@
 [![CI](https://github.com/split/lockfile-affected/actions/workflows/ci.yml/badge.svg)](https://github.com/split/lockfile-affected/actions/workflows/ci.yml)
 [![npm version](https://img.shields.io/npm/v/lockfile-affected)](https://www.npmjs.com/package/lockfile-affected)
 
+> **Warning:** This tool is still in early development. The API may change, and some features are incomplete or not yet fully tested. Use in production at your own risk.
+
 Find which workspace packages are affected by lockfile changes.
 
 ## Installation
@@ -29,7 +31,7 @@ Pass the before and after lockfile snapshots as arguments:
 lockfile-affected pnpm-lock.yaml.old pnpm-lock.yaml
 ```
 
-Works with pnpm, npm, yarn (classic v1 and berry v2+), and Bun text lockfiles (`bun.lock`).
+Works with pnpm, npm, Yarn Berry (v2+), and Bun text lockfiles (`bun.lock`).
 
 For full Git and CI usage patterns, see the CLI guide:
 [`packages/cli/README.md`](packages/cli/README.md).
@@ -40,5 +42,9 @@ For full Git and CI usage patterns, see the CLI guide:
 - [`@lockfile-affected/core`](packages/core) — pure diff and resolution engine
 - [`@lockfile-affected/lockfile-pnpm`](packages/lockfile-pnpm) — pnpm-lock.yaml parser
 - [`@lockfile-affected/lockfile-npm`](packages/lockfile-npm) — package-lock.json parser
-- [`@lockfile-affected/lockfile-yarn`](packages/lockfile-yarn) — yarn.lock parser
+- [`@lockfile-affected/lockfile-yarn`](packages/lockfile-yarn) — yarn.lock parser (Yarn Berry v2+)
 - [`@lockfile-affected/lockfile-bun`](packages/lockfile-bun) — bun.lock parser
+
+## Development
+
+This project was developed with AI assistance.
diff --git a/packages/cli/e2e/fixtures/bun-deep-chain/after-bun.lock b/packages/cli/e2e/fixtures/bun-deep-chain/after-bun.lock
@@ -0,0 +1,44 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "deep-chain-test",
+      "dependencies": {
+        "express": "^4.18.0"
+      }
+    },
+    "packages/pkg-leaf": {
+      "name": "pkg-leaf",
+      "version": "1.0.0",
+      "dependencies": {
+        "express": "^4.18.0"
+      }
+    },
+    "packages/pkg-base": {
+      "name": "pkg-base",
+      "version": "1.0.0",
+      "dependencies": {
+        "pkg-leaf": "workspace:*"
+      }
+    },
+    "packages/pkg-middle": {
+      "name": "pkg-middle",
+      "version": "1.0.0",
+      "dependencies": {
+        "pkg-base": "workspace:*"
+      }
+    },
+    "packages/pkg-top": {
+      "name": "pkg-top",
+      "version": "1.0.0",
+      "dependencies": {
+        "pkg-middle": "workspace:*"
+      }
+    }
+  },
+  "packages": {
+    "express": ["express@4.18.5", "", {}, "sha512-express-4-18-5"],
+    "express@4.18.5": ["express@4.18.5", "", {}, "sha512-express-4-18-5"]
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-deep-chain/before-bun.lock b/packages/cli/e2e/fixtures/bun-deep-chain/before-bun.lock
@@ -0,0 +1,44 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "deep-chain-test",
+      "dependencies": {
+        "express": "^4.18.0"
+      }
+    },
+    "packages/pkg-leaf": {
+      "name": "pkg-leaf",
+      "version": "1.0.0",
+      "dependencies": {
+        "express": "^4.18.0"
+      }
+    },
+    "packages/pkg-base": {
+      "name": "pkg-base",
+      "version": "1.0.0",
+      "dependencies": {
+        "pkg-leaf": "workspace:*"
+      }
+    },
+    "packages/pkg-middle": {
+      "name": "pkg-middle",
+      "version": "1.0.0",
+      "dependencies": {
+        "pkg-base": "workspace:*"
+      }
+    },
+    "packages/pkg-top": {
+      "name": "pkg-top",
+      "version": "1.0.0",
+      "dependencies": {
+        "pkg-middle": "workspace:*"
+      }
+    }
+  },
+  "packages": {
+    "express": ["express@4.18.0", "", {}, "sha512-express-4-18-0"],
+    "express@4.18.0": ["express@4.18.0", "", {}, "sha512-express-4-18-0"]
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-deep-chain/workspace/package.json b/packages/cli/e2e/fixtures/bun-deep-chain/workspace/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "deep-chain-test",
+  "private": true,
+  "workspaces": [
+    "packages/*"
+  ]
+}
diff --git a/packages/cli/e2e/fixtures/bun-deep-chain/workspace/packages/pkg-base/package.json b/packages/cli/e2e/fixtures/bun-deep-chain/workspace/packages/pkg-base/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "pkg-base",
+  "version": "1.0.0",
+  "dependencies": {
+    "pkg-leaf": "workspace:*"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-deep-chain/workspace/packages/pkg-leaf/package.json b/packages/cli/e2e/fixtures/bun-deep-chain/workspace/packages/pkg-leaf/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "pkg-leaf",
+  "version": "1.0.0",
+  "dependencies": {
+    "express": "^4.18.0"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-deep-chain/workspace/packages/pkg-middle/package.json b/packages/cli/e2e/fixtures/bun-deep-chain/workspace/packages/pkg-middle/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "pkg-middle",
+  "version": "1.0.0",
+  "dependencies": {
+    "pkg-base": "workspace:*"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-deep-chain/workspace/packages/pkg-top/package.json b/packages/cli/e2e/fixtures/bun-deep-chain/workspace/packages/pkg-top/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "pkg-top",
+  "version": "1.0.0",
+  "dependencies": {
+    "pkg-middle": "workspace:*"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-diamond/after-bun.lock b/packages/cli/e2e/fixtures/bun-diamond/after-bun.lock
@@ -0,0 +1,42 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "diamond-test"
+    },
+    "packages/lib-c": {
+      "name": "lib-c",
+      "version": "1.0.0",
+      "dependencies": {
+        "shared-dep": "^1.0.0"
+      }
+    },
+    "packages/lib-a": {
+      "name": "lib-a",
+      "version": "1.0.0",
+      "dependencies": {
+        "lib-c": "workspace:*"
+      }
+    },
+    "packages/lib-b": {
+      "name": "lib-b",
+      "version": "1.0.0",
+      "dependencies": {
+        "lib-c": "workspace:*"
+      }
+    },
+    "packages/app": {
+      "name": "app",
+      "version": "1.0.0",
+      "dependencies": {
+        "lib-a": "workspace:*",
+        "lib-b": "workspace:*"
+      }
+    }
+  },
+  "packages": {
+    "shared-dep": ["shared-dep@2.0.0", "", {}, "sha512-shared-dep-2-0-0"],
+    "shared-dep@2.0.0": ["shared-dep@2.0.0", "", {}, "sha512-shared-dep-2-0-0"]
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-diamond/before-bun.lock b/packages/cli/e2e/fixtures/bun-diamond/before-bun.lock
@@ -0,0 +1,42 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "diamond-test"
+    },
+    "packages/lib-c": {
+      "name": "lib-c",
+      "version": "1.0.0",
+      "dependencies": {
+        "shared-dep": "^1.0.0"
+      }
+    },
+    "packages/lib-a": {
+      "name": "lib-a",
+      "version": "1.0.0",
+      "dependencies": {
+        "lib-c": "workspace:*"
+      }
+    },
+    "packages/lib-b": {
+      "name": "lib-b",
+      "version": "1.0.0",
+      "dependencies": {
+        "lib-c": "workspace:*"
+      }
+    },
+    "packages/app": {
+      "name": "app",
+      "version": "1.0.0",
+      "dependencies": {
+        "lib-a": "workspace:*",
+        "lib-b": "workspace:*"
+      }
+    }
+  },
+  "packages": {
+    "shared-dep": ["shared-dep@1.0.0", "", {}, "sha512-shared-dep-1-0-0"],
+    "shared-dep@1.0.0": ["shared-dep@1.0.0", "", {}, "sha512-shared-dep-1-0-0"]
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-diamond/workspace/package.json b/packages/cli/e2e/fixtures/bun-diamond/workspace/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "diamond-test",
+  "private": true,
+  "workspaces": [
+    "packages/*"
+  ]
+}
diff --git a/packages/cli/e2e/fixtures/bun-diamond/workspace/packages/app/package.json b/packages/cli/e2e/fixtures/bun-diamond/workspace/packages/app/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "app",
+  "version": "1.0.0",
+  "dependencies": {
+    "lib-a": "workspace:*",
+    "lib-b": "workspace:*"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-diamond/workspace/packages/lib-a/package.json b/packages/cli/e2e/fixtures/bun-diamond/workspace/packages/lib-a/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "lib-a",
+  "version": "1.0.0",
+  "dependencies": {
+    "lib-c": "workspace:*"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-diamond/workspace/packages/lib-b/package.json b/packages/cli/e2e/fixtures/bun-diamond/workspace/packages/lib-b/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "lib-b",
+  "version": "1.0.0",
+  "dependencies": {
+    "lib-c": "workspace:*"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-diamond/workspace/packages/lib-c/package.json b/packages/cli/e2e/fixtures/bun-diamond/workspace/packages/lib-c/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "lib-c",
+  "version": "1.0.0",
+  "dependencies": {
+    "shared-dep": "^1.0.0"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-transitive/after-bun.lock b/packages/cli/e2e/fixtures/bun-transitive/after-bun.lock
@@ -0,0 +1,31 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "test-monorepo",
+      "dependencies": {
+        "lodash": "^4.17.0"
+      }
+    },
+    "packages/pkg-base": {
+      "name": "pkg-base",
+      "version": "1.0.0",
+      "dependencies": {
+        "lodash": "^4.17.23"
+      }
+    },
+    "packages/pkg-middle": {
+      "name": "pkg-middle",
+      "version": "1.0.0",
+      "dependencies": {
+        "pkg-base": "1.0.0"
+      }
+    }
+  },
+  "packages": {
+    "lodash": ["lodash@4.17.23", "", {}, "sha512-LgVTMpQtIopCi79SJeDiP0TfWi5CNEc/L/aRdTh3yIvmZXTnheWpKjSZhnvMl8iXbC1tFg9gdHHDMLoV7CnG+w=="],
+    "lodash@4.17.21": ["lodash@4.17.21", "", {}, "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZbet2yk9dzQ1uFR5/0w=="],
+    "lodash@4.17.23": ["lodash@4.17.23", "", {}, "sha512-LgVTMpQtIopCi79SJeDiP0TfWi5CNEc/L/aRdTh3yIvmZXTnheWpKjSZhnvMl8iXbC1tFg9gdHHDMLoV7CnG+w=="]
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-transitive/before-bun.lock b/packages/cli/e2e/fixtures/bun-transitive/before-bun.lock
@@ -0,0 +1,30 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "test-monorepo",
+      "dependencies": {
+        "lodash": "^4.17.0"
+      }
+    },
+    "packages/pkg-base": {
+      "name": "pkg-base",
+      "version": "1.0.0",
+      "dependencies": {
+        "lodash": "^4.17.0"
+      }
+    },
+    "packages/pkg-middle": {
+      "name": "pkg-middle",
+      "version": "1.0.0",
+      "dependencies": {
+        "pkg-base": "1.0.0"
+      }
+    }
+  },
+  "packages": {
+    "lodash": ["lodash@4.17.21", "", {}, "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZbet2yk9dzQ1uFR5/0w=="],
+    "lodash@4.17.21": ["lodash@4.17.21", "", {}, "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZbet2yk9dzQ1uFR5/0w=="]
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-transitive/workspace/package.json b/packages/cli/e2e/fixtures/bun-transitive/workspace/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "test-monorepo",
+  "private": true,
+  "workspaces": [
+    "packages/*"
+  ]
+}
diff --git a/packages/cli/e2e/fixtures/bun-transitive/workspace/packages/pkg-base/package.json b/packages/cli/e2e/fixtures/bun-transitive/workspace/packages/pkg-base/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "pkg-base",
+  "version": "1.0.0",
+  "dependencies": {
+    "lodash": "^4.17.23"
+  }
+}
diff --git a/packages/cli/e2e/fixtures/bun-transitive/workspace/packages/pkg-middle/package.json b/packages/cli/e2e/fixtures/bun-transitive/workspace/packages/pkg-middle/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "pkg-middle",
+  "version": "1.0.0",
+  "dependencies": {
+    "pkg-base": "1.0.0"
+  }
+}