diff --git a/docs/sbom-dependency-scope.md b/docs/sbom-dependency-scope.md
index 78a916d..103b7a7 100644
--- a/docs/sbom-dependency-scope.md
+++ b/docs/sbom-dependency-scope.md
@@ -67,6 +67,12 @@ When the same name and version is declared in more than one section, one mark is
 | `pom.xml` dependencies inside `<profiles>` | Not parsed. | Absent. | Absent. |
 | Gradle `implementation`, `api`, `compileOnly`, `runtimeOnly`, `annotationProcessor`, `kapt`, and `platform` | Section `dependencies`. The configuration name is not a scan field. Exported. | `vibgrate:scope` = `direct`. Component `scope` omitted. `dependencies` omitted. | Annotation `scope=direct`. No document relationship. |
 | Gradle `testImplementation`, `testRuntimeOnly`, and `testCompileOnly` | Section `devDependencies`. A coordinate also declared on a production configuration in the same file stays section `dependencies`, and that production declaration supplies the version. The configuration name is not a scan field. Exported. | `vibgrate:scope` = `direct`. Component `scope` = `excluded`. `dependencies` omitted. | Annotation `scope=direct`. `DEV_DEPENDENCY_OF` from that package to `SPDXRef-DOCUMENT`. |
+| Ruby `Gemfile` `group :development` / `group :test` blocks and inline `group:` | Parsed as section `devDependencies`. Exported as direct rows. | `vibgrate:scope` = `direct`. Component `scope` = `excluded`. | Annotation `scope=direct`. `DEV_DEPENDENCY_OF` from the package to `SPDXRef-DOCUMENT`. |
+| Ruby gemspec `add_development_dependency` | Parsed as section `devDependencies`. Exported as direct rows. | `vibgrate:scope` = `direct`. Component `scope` = `excluded`. | Annotation `scope=direct`. `DEV_DEPENDENCY_OF` from the package to `SPDXRef-DOCUMENT`. |
+| Go `go.mod` requirement marked `// indirect` | Not kept as a direct row. If the dependency appears in `go.sum`, it can be included as a lockfile-only component. | `vibgrate:scope` = `transitive` when supplied only by `go.sum`. Component `scope` omitted. | Annotation `scope=transitive` when supplied only by `go.sum`. No development relationship. |
+| Go `go.sum` entry | Supplies lockfile-only components. A dependency already declared as a direct row remains `direct`; a lockfile-only component is `transitive`. | `vibgrate:scope` = `direct` or `transitive` according to the scan and lockfile match. Component `scope` omitted for lockfile-only rows. | Annotation `scope=direct` or `scope=transitive`. No development relationship for lockfile-only rows. |
+| Dart `pubspec.yaml` `dev_dependencies` | Parsed, then removed by `allDeps.filter(d => !d.isDev)`. | Not a direct row. Absent unless supplied through another supported component source. | Absent unless supplied through another supported component source. |
+| PHP `composer.json` `require-dev` | Parsed, then removed by `allDeps.filter(d => !d.isDev)`. `composer.lock` is not expanded into SBOM components. | Absent. | Absent. |
 
 `--no-transitive` keeps the manifest rows (development, optional, and peer included) and omits lockfile-only rows. It omits CycloneDX `dependencies`. SPDX still writes `DEV_DEPENDENCY_OF` and `OPTIONAL_DEPENDENCY_OF` for those manifest rows, and it omits `DEPENDS_ON` because the lockfile graph is not read.
 
diff --git a/src/engine/lockfile.test.ts b/src/engine/lockfile.test.ts
index 5816d42..285c925 100644
--- a/src/engine/lockfile.test.ts
+++ b/src/engine/lockfile.test.ts
@@ -158,6 +158,49 @@ describe('lockfileVersion — npm precedence', () => {
   });
 });
 
+describe('Yarn Berry lockfile', () => {
+  it('skips workspace entries and resolves patch and alias descriptors', () => {
+    write(
+      'yarn.lock',
+      `
+__metadata:
+  version: 8
+  cacheKey: 10c0
+
+"lodash@npm:^4.17.21":
+  version: 4.17.21
+  resolution: "lodash@npm:4.17.21"
+  languageName: node
+  linkType: hard
+
+"my-app@workspace:.":
+  version: 0.0.0-use.local
+  resolution: "my-app@workspace:."
+  languageName: unknown
+  linkType: soft
+
+"resolve@patch:resolve@npm%3A^1.20.0#~builtin<compat/resolve>":
+  version: 1.22.8
+  resolution: "resolve@patch:resolve@npm%3A^1.20.0#~builtin<compat/resolve>"
+
+"string-width-cjs@npm:string-width@^4.2.3":
+  version: 4.2.3
+  resolution: "string-width-cjs@npm:string-width@^4.2.3"
+`.trimStart(),
+    );
+
+    const tree = fullDependencyTree(root);
+    const names = Object.keys(tree || {});
+
+    expect(names).toContain('lodash');
+    expect(names).not.toContain('my-app');
+    expect(names).not.toContain('__metadata');
+
+    expect(lockfileVersion(root, 'npm', 'resolve')).toBe('1.22.8');
+    expect(lockfileVersion(root, 'npm', 'string-width-cjs')).toBe('4.2.3');
+  });
+});
+
 describe('fullDependencyTree', () => {
   it('reads the full transitive graph from an npm v2/v3 package-lock.json, not just direct deps', () => {
     write(
diff --git a/src/engine/lockfile.ts b/src/engine/lockfile.ts
index c5bc211..0260830 100644
--- a/src/engine/lockfile.ts
+++ b/src/engine/lockfile.ts
@@ -506,13 +506,29 @@ function yarnLockTree(root: string): LockfileComponent[] | undefined {
   };
   for (const line of text.split('\n')) {
     if (line && !/^\s/.test(line) && !line.startsWith('#')) {
-      pendingNames = line
+      const specs = line
         .replace(/:\s*$/, '')
         .split(',')
-        .map((spec) => yarnHeaderRealName(spec.trim().replace(/^"|"$/g, '')))
-        .filter((n): n is string => Boolean(n));
-      pendingDigests = [];
-      open = [];
+        .map((spec) => spec.trim().replace(/^"|"$/g, ''));
+
+      // Yarn Berry workspace root (e.g. "my-app@workspace:.") is the project,
+      // not a registry package — never emit it as an SBOM component.
+      const allWorkspace = specs.length > 0 && specs.every((spec) => {
+        const parsed = splitYarnDescriptor(spec);
+        return parsed?.range.startsWith('workspace:');
+      });
+
+      if (allWorkspace) {
+        pendingNames = [];
+        pendingDigests = [];
+        open = [];
+      } else {
+        pendingNames = specs
+          .map((spec) => yarnHeaderRealName(spec))
+          .filter((n): n is string => Boolean(n));
+        pendingDigests = [];
+        open = [];
+      }
     } else if (pendingNames.length) {
       const m = /^\s+version:?\s+"?([^"\s]+)"?/.exec(line);
       if (m) {
@@ -730,9 +746,6 @@ function headerNamesPackage(header: string, name: string): boolean {
     .split(',')
     .some((spec) => {
       const s = spec.trim().replace(/^"|"$/g, '');
-      const at = s.lastIndexOf('@');
-      if (at <= 0) return false; // <=0 keeps scoped leading '@' from matching empty name
-      const specName = s.slice(0, at);
-      return specName === name;
+      return splitYarnDescriptor(s)?.name === name;
     });
 }