diff --git a/.changeset/tauri-alignment-groups.md b/.changeset/tauri-alignment-groups.md
new file mode 100644
index 00000000..0c59db2d
--- /dev/null
+++ b/.changeset/tauri-alignment-groups.md
@@ -0,0 +1,5 @@
+---
+"@stll/oxlint-config": patch
+---
+
+Keep Tauri dependency families together across all update types in generated and validated Dependabot groups.
diff --git a/packages/oxlint-config/README.md b/packages/oxlint-config/README.md
index fc479209..6f35871b 100644
--- a/packages/oxlint-config/README.md
+++ b/packages/oxlint-config/README.md
@@ -410,6 +410,12 @@ Use `stll-dependabot --check` in CI to compare bytes without writing. Missing or
 stale output exits with status 1; current output exits with status 0. Pass the
 same `--config` argument to write and check commands when using explicit input.
 
+Repositories declaring Tauri dependencies receive a `tauri` group before the
+shared semver groups: `@tauri-apps/*` for Bun/npm, and `tauri` plus `tauri-*`
+for Cargo. The cohort includes major, minor, and patch updates; fallback
+groups exclude those patterns. Generator and guard derive this from dependency
+manifest ownership, including Cargo workspace and target dependencies.
+
 An optional `--config stll-dependabot.json` input declares only coverage:
 
 ```json
diff --git a/packages/oxlint-config/src/toolchain-dependabot.test.ts b/packages/oxlint-config/src/toolchain-dependabot.test.ts
index d858e8cc..e715e0a8 100644
--- a/packages/oxlint-config/src/toolchain-dependabot.test.ts
+++ b/packages/oxlint-config/src/toolchain-dependabot.test.ts
@@ -1472,3 +1472,114 @@ describe("Dependabot policy", () => {
       expect(check(text).length).toBeGreaterThan(0);
   });
 });
+
+describe("Tauri dependency alignment", () => {
+  test("separate npm roots do not add a cohort to an unrelated Bun workspace", () => {
+    const files = {
+      "package.json": JSON.stringify({
+        packageManager: "bun@1.4.4",
+        dependencies: { react: "19" },
+      }),
+      "standalone/package.json": JSON.stringify({
+        packageManager: "npm@10.9.9",
+        dependencies: { "@tauri-apps/api": "2" },
+      }),
+      "standalone/package-lock.json": "{}",
+    };
+    const generated = generateDependabotConfig({ files, policy });
+    const document = parseDocument(generated);
+    expect(document.getIn(["updates", 0, "package-ecosystem"])).toBe("bun");
+    expect(document.hasIn(["updates", 0, "groups", "tauri"])).toBeFalse();
+    expect(document.getIn(["updates", 1, "package-ecosystem"])).toBe("npm");
+    expect(document.hasIn(["updates", 1, "groups", "tauri"])).toBeTrue();
+    expect(check(generated, files)).toEqual([]);
+  });
+
+  test("detected JavaScript and Cargo owners share generated and guarded cohorts", () => {
+    for (const [file, text] of [
+      [
+        "package.json",
+        JSON.stringify({
+          packageManager: "bun@1.4.4",
+          dependencies: { "@tauri-apps/api": "2.0.0" },
+        }),
+      ],
+      [
+        "package.json",
+        JSON.stringify({ devDependencies: { "@tauri-apps/cli": "2.0.0" } }),
+      ],
+      [
+        "Cargo.toml",
+        '[package]\nname="desktop"\nversion="0.1.0"\n[dependencies]\ntauri="2"',
+      ],
+      ["Cargo.toml", '[workspace.dependencies]\ntauri-build="2"'],
+      [
+        "Cargo.toml",
+        '[target.windows.dependencies]\nbridge={package="tauri",version="2"}',
+      ],
+    ] as const) {
+      const files = { [file]: text };
+      const generated = generateDependabotConfig({ files, policy });
+      const document = parseDocument(generated);
+      const types = document.getIn([
+        "updates",
+        0,
+        "groups",
+        "tauri",
+        "update-types",
+      ]);
+      const exclusions = document.getIn([
+        "updates",
+        0,
+        "groups",
+        "dependencies",
+        "exclude-patterns",
+      ]);
+      const patterns = document.getIn([
+        "updates",
+        0,
+        "groups",
+        "tauri",
+        "patterns",
+      ]);
+      if (!isSeq(types) || !isSeq(exclusions) || !isSeq(patterns))
+        throw new Error("expected alignment group sequences");
+      expect(types.toJSON()).toEqual(["major", "minor", "patch"]);
+      expect(exclusions.toJSON()).toEqual(patterns.toJSON());
+      expect(check(generated, files)).toEqual([]);
+      for (const key of [
+        ["updates", 0, "groups", "dependencies", "exclude-patterns"],
+        ["updates", 0, "groups", "tauri"],
+        ["updates", 0, "groups", "tauri", "update-types", 0],
+      ]) {
+        const invalid = parseDocument(generated);
+        invalid.deleteIn(key);
+        expect(
+          check(invalid.toString(), files).some(({ message }) =>
+            message.includes("groups"),
+          ),
+        ).toBeTrue();
+      }
+    }
+  });
+
+  test("unrelated manifests and Cargo metadata do not create an alignment cohort", () => {
+    for (const [file, text] of [
+      [
+        "package.json",
+        JSON.stringify({ description: "tauri", dependencies: { react: "19" } }),
+      ],
+      [
+        "Cargo.toml",
+        '[package]\nname="tauri-example"\nversion="0.1.0"\n[package.metadata.dependencies]\ntauri="2"',
+      ],
+    ] as const) {
+      const files = { [file]: text };
+      const generated = generateDependabotConfig({ files, policy });
+      expect(
+        parseDocument(generated).hasIn(["updates", 0, "groups", "tauri"]),
+      ).toBeFalse();
+      expect(check(generated, files)).toEqual([]);
+    }
+  });
+});
diff --git a/packages/oxlint-config/src/toolchain-dependabot.ts b/packages/oxlint-config/src/toolchain-dependabot.ts
index 854d9bef..8bcda178 100644
--- a/packages/oxlint-config/src/toolchain-dependabot.ts
+++ b/packages/oxlint-config/src/toolchain-dependabot.ts
@@ -85,18 +85,106 @@ type DependabotPolicy = {
 type DependabotGroup = {
   patterns: readonly string[];
   updateTypes?: readonly string[] | undefined;
+  excludePatterns?: readonly string[] | undefined;
 };
 
-/** Ordered groups for one ecosystem: GitHub Actions first gathers first-party refs. */
-const groupsFor = (
+const tauriPatterns = (ecosystem: string): readonly string[] => {
+  if (ecosystem === "cargo") return ["tauri", "tauri-*"];
+  if (ecosystem === "bun" || ecosystem === "npm") return ["@tauri-apps/*"];
+  return [];
+};
+
+const ownsTauriDependencies = (
   ecosystem: string,
-  policy: DependabotPolicy,
-): [string, DependabotGroup][] => [
-  ...(ecosystem === "github-actions"
-    ? Object.entries(policy.actionGroups)
-    : []),
-  ...Object.entries(policy.groups),
-];
+  files: Readonly<Record<string, string>>,
+) => {
+  const patterns = tauriPatterns(ecosystem);
+  if (patterns.length === 0) return false;
+  const matches = picomatch([...patterns]);
+  const dependencyTables =
+    ecosystem === "cargo"
+      ? ["dependencies", "dev-dependencies", "build-dependencies"]
+      : [
+          "dependencies",
+          "devDependencies",
+          "optionalDependencies",
+          "peerDependencies",
+        ];
+  const owns = (owner: unknown) => {
+    if (!record(owner)) return false;
+    for (const key of dependencyTables) {
+      const dependencies = owner[key];
+      if (!record(dependencies)) continue;
+      if (
+        Object.entries(dependencies).some(([name, value]) =>
+          matches(
+            record(value) && typeof value["package"] === "string"
+              ? value["package"]
+              : name,
+          ),
+        )
+      )
+        return true;
+    }
+    return false;
+  };
+  return Object.entries(files).some(([file, text]) => {
+    const manifest = ecosystem === "cargo" ? "Cargo.toml" : "package.json";
+    if (path.posix.basename(file) !== manifest || !text.includes("tauri"))
+      return false;
+    if (
+      ecosystem !== "cargo" &&
+      javascriptEcosystem(directoryOf(file), files) !== ecosystem
+    )
+      return false;
+    const manifestValue: unknown =
+      ecosystem === "cargo" ? parseToml(text) : JSON.parse(text);
+    if (owns(manifestValue)) return true;
+    if (ecosystem !== "cargo" || !record(manifestValue)) return false;
+    // Only Cargo's dependency owners count; package metadata is arbitrary data.
+    if (owns(manifestValue["workspace"])) return true;
+    const targets = manifestValue["target"];
+    return record(targets) && Object.values(targets).some(owns);
+  });
+};
+
+type DependabotGroupsOptions = {
+  ecosystem: string;
+  policy: DependabotPolicy;
+  files: Readonly<Record<string, string>>;
+};
+
+/** Alignment cohorts precede semver groups so coupled major updates stay together. */
+const groupsFor = ({
+  ecosystem,
+  policy,
+  files,
+}: DependabotGroupsOptions): [string, DependabotGroup][] => {
+  const alignment = ownsTauriDependencies(ecosystem, files)
+    ? tauriPatterns(ecosystem)
+    : [];
+  return [
+    ...(ecosystem === "github-actions"
+      ? Object.entries(policy.actionGroups)
+      : []),
+    ...(alignment.length === 0
+      ? []
+      : ([
+          [
+            "tauri",
+            { patterns: alignment, updateTypes: ["major", "minor", "patch"] },
+          ],
+        ] satisfies [string, DependabotGroup][])),
+    ...Object.entries(policy.groups).map(
+      ([name, group]): [string, DependabotGroup] => [
+        name,
+        alignment.length === 0
+          ? group
+          : { ...group, excludePatterns: alignment },
+      ],
+    ),
+  ];
+};
 
 type Diagnostic = {
   rule: (typeof dependabotRules)[number];
@@ -820,11 +908,13 @@ export const generateDependabotConfig = ({
         },
         cooldown: { "default-days": policy.cooldown.defaultDays },
         groups: Object.fromEntries(
-          groupsFor(ecosystem, policy).map(([name, group]) => [
+          groupsFor({ ecosystem, policy, files }).map(([name, group]) => [
             name,
-            group.updateTypes === undefined
-              ? { patterns: group.patterns }
-              : { patterns: group.patterns, "update-types": group.updateTypes },
+            {
+              patterns: group.patterns,
+              "update-types": group.updateTypes,
+              "exclude-patterns": group.excludePatterns,
+            },
           ]),
         ),
         ignore: ignore.length > 0 ? ignore : undefined,
@@ -1019,7 +1109,7 @@ export const checkDependabot = ({
         `${ecosystem}: cooldown must contain only default-days: ${policy.cooldown.defaultDays}`,
       );
     const groups = update["groups"];
-    const expectedGroups = groupsFor(ecosystem, policy);
+    const expectedGroups = groupsFor({ ecosystem, policy, files });
     if (
       !record(groups) ||
       // Dependabot assigns an update to the first matching group.
@@ -1030,8 +1120,15 @@ export const checkDependabot = ({
         return (
           !record(group) ||
           Object.keys(group).length !==
-            (expected.updateTypes === undefined ? 1 : 2) ||
+            1 +
+              Number(expected.updateTypes !== undefined) +
+              Number(expected.excludePatterns !== undefined) ||
           !sameStrings(group["patterns"], expected.patterns) ||
+          (expected.excludePatterns !== undefined &&
+            !sameStrings(
+              group["exclude-patterns"],
+              expected.excludePatterns,
+            )) ||
           (expected.updateTypes !== undefined &&
             !sameStrings(group["update-types"], expected.updateTypes))
         );