diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4253dfe..cb221e9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -173,11 +173,7 @@ jobs:
   lume_macos_contract_trusted:
     name: lume macos contract
     if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
-    runs-on:
-      - self-hosted
-      - macOS
-      - ARM64
-      - xcode
+    runs-on: ubuntu-latest
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@v6
diff --git a/.github/workflows/release-image.yml b/.github/workflows/release-image.yml
index 71c796e..16bb82c 100644
--- a/.github/workflows/release-image.yml
+++ b/.github/workflows/release-image.yml
@@ -28,11 +28,7 @@ env:
 jobs:
   publish_and_verify:
     name: publish-and-verify
-    runs-on:
-      - self-hosted
-      - linux
-      - shell-only
-      - public
+    runs-on: ubuntu-latest
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
       SYNOLOGY_RUNNER_BASE_DIR: /volume1/docker/github-runner-fleet
@@ -109,6 +105,10 @@ jobs:
             process.env.GITHUB_OUTPUT,
             `image_ref=${config.image.repository}:${config.image.tag}\n`
           );
+          fs.appendFileSync(
+            process.env.GITHUB_OUTPUT,
+            `image_repo=${config.image.repository}\n`
+          );
           fs.appendFileSync(
             process.env.GITHUB_OUTPUT,
             `image_tag=${config.image.tag}\n`
@@ -177,7 +177,7 @@ jobs:
       - name: Emit SLSA provenance
         uses: actions/attest-build-provenance@v3
         with:
-          subject-name: ${{ steps.release_meta.outputs.image_ref }}
+          subject-name: ${{ steps.release_meta.outputs.image_repo }}
           subject-digest: ${{ steps.image_digest.outputs.digest }}
           push-to-registry: true
 
diff --git a/.github/workflows/rg-security.yml b/.github/workflows/rg-security.yml
index b627857..9a92095 100644
--- a/.github/workflows/rg-security.yml
+++ b/.github/workflows/rg-security.yml
@@ -20,11 +20,7 @@ permissions:
 jobs:
   security:
     name: rg-security
-    runs-on:
-      - self-hosted
-      - linux
-      - shell-only
-      - public
+    runs-on: ubuntu-latest
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@v6
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index 6d9f509..0fcb4ff 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -14,11 +14,7 @@ permissions:
 jobs:
   scorecard:
     name: openssf-scorecard
-    runs-on:
-      - self-hosted
-      - linux
-      - shell-only
-      - public
+    runs-on: ubuntu-latest
     permissions:
       contents: read
       id-token: write
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index c0f1e66..af7a475 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -21,11 +21,7 @@ env:
 jobs:
   codeql:
     name: codeql
-    runs-on:
-      - self-hosted
-      - linux
-      - shell-only
-      - public
+    runs-on: ubuntu-latest
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@v6
@@ -37,11 +33,7 @@ jobs:
   dependency_review:
     name: dependency-review
     if: github.event_name == 'pull_request'
-    runs-on:
-      - self-hosted
-      - linux
-      - shell-only
-      - public
+    runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@v6
@@ -52,11 +44,7 @@ jobs:
 
   osv:
     name: osv
-    runs-on:
-      - self-hosted
-      - linux
-      - shell-only
-      - public
+    runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@v6
diff --git a/scripts/lume/install-runtime.sh b/scripts/lume/install-runtime.sh
index c9c1482..a44594b 100755
--- a/scripts/lume/install-runtime.sh
+++ b/scripts/lume/install-runtime.sh
@@ -67,7 +67,7 @@ GITHUB_API_URL=https://api.github.com
 LUME_RUNNER_BASE_DIR='${lume_base_dir}'
 LUME_RUNNER_ENV_FILE='${lume_base_dir}/runner.env'
 COMPOSE_PROJECT_NAME=github-runner-fleet
-RUNNER_VERSION=2.333.0
+RUNNER_VERSION=2.334.0
 EOF
   install -m 0600 "${temp_path}" "${env_path}"
   rm -f "${temp_path}"
diff --git a/test/lume-scripts.test.ts b/test/lume-scripts.test.ts
index 62f0640..1fe96f0 100644
--- a/test/lume-scripts.test.ts
+++ b/test/lume-scripts.test.ts
@@ -46,6 +46,8 @@ describe("Lume pool scripts", () => {
     expect(installRuntime).toContain("Library/Application Support/github-runner-fleet/controller");
     expect(installRuntime).toContain("rsync -a --delete");
     expect(installRuntime).toContain("pnpm --dir");
+    expect(installRuntime).toContain("RUNNER_VERSION=2.334.0");
+    expect(installRuntime).not.toContain("RUNNER_VERSION=2.333.0");
     expect(installRuntime).toContain("install_lume_controller_runtime");
     expect(installRuntime).toContain('if [[ -f "${runtime_env}" ]]');
     expect(installRuntime.indexOf('if [[ -f "${runtime_env}" ]]')).toBeLessThan(
diff --git a/test/release-workflow.test.ts b/test/release-workflow.test.ts
index 0c8ed49..76244dc 100644
--- a/test/release-workflow.test.ts
+++ b/test/release-workflow.test.ts
@@ -3,10 +3,8 @@ import path from "node:path";
 import YAML from "yaml";
 import { describe, expect, test } from "vitest";
 
-const shellSafePublicRunner = ["self-hosted", "linux", "shell-only", "public"];
-
 describe("release workflow", () => {
-  test("publishes on shell-safe self-hosted runners, verifies the pushed tag, and can create a repo release from main", () => {
+  test("publishes on GitHub-hosted runners, verifies the pushed tag, and can create a repo release from main", () => {
     const workflow = YAML.parse(
       fs.readFileSync(
         path.resolve(".github/workflows/release-image.yml"),
@@ -41,7 +39,7 @@ describe("release workflow", () => {
       "id-token": "write",
       attestations: "write"
     });
-    expect(job["runs-on"]).toEqual(shellSafePublicRunner);
+    expect(job["runs-on"]).toBe("ubuntu-latest");
     expect(job.env).toMatchObject({
       GITHUB_PAT: "${{ secrets.GITHUB_TOKEN }}",
       SYNOLOGY_RUNNER_BASE_DIR: "/volume1/docker/github-runner-fleet"
@@ -65,6 +63,25 @@ describe("release workflow", () => {
     expect(
       steps.some((step) => step.uses === "actions/attest-build-provenance@v3")
     ).toBe(true);
+    expect(
+      steps.some(
+        (step) =>
+          typeof step.run === "string" &&
+          step.run.includes("image_ref=${config.image.repository}:${config.image.tag}") &&
+          step.run.includes("image_repo=${config.image.repository}")
+      )
+    ).toBe(true);
+    expect(
+      steps.some(
+        (step) =>
+          step.name === "Emit SLSA provenance" &&
+          step.with &&
+          (step.with as Record<string, unknown>)["subject-name"] ===
+            "${{ steps.release_meta.outputs.image_repo }}" &&
+          (step.with as Record<string, unknown>)["subject-digest"] ===
+            "${{ steps.image_digest.outputs.digest }}"
+      )
+    ).toBe(true);
     expect(
       steps.some(
         (step) =>
diff --git a/test/security-workflow.test.ts b/test/security-workflow.test.ts
index de1c6cf..6edbe3d 100644
--- a/test/security-workflow.test.ts
+++ b/test/security-workflow.test.ts
@@ -6,7 +6,7 @@ import { describe, expect, test } from "vitest";
 const shellSafePublicRunner = ["self-hosted", "linux", "shell-only", "public"];
 
 describe("security and reusable workflows", () => {
-  test("keeps security scans on shell-safe self-hosted runners with Security tab upload", () => {
+  test("keeps security scans on GitHub-hosted runners with Security tab upload", () => {
     const workflow = YAML.parse(
       fs.readFileSync(path.resolve(".github/workflows/security.yml"), "utf8")
     ) as { permissions: Record<string, string>; jobs: Record<string, Record<string, unknown>> };
@@ -16,7 +16,7 @@ describe("security and reusable workflows", () => {
       "security-events": "write"
     });
     for (const job of Object.values(workflow.jobs)) {
-      expect(job["runs-on"]).toEqual(shellSafePublicRunner);
+      expect(job["runs-on"]).toBe("ubuntu-latest");
     }
     expect(String(JSON.stringify(workflow))).toContain("github/codeql-action/init");
     expect(String(JSON.stringify(workflow))).toContain("dependency-review-action");
@@ -43,7 +43,7 @@ describe("security and reusable workflows", () => {
       "id-token": "write",
       "security-events": "write"
     });
-    expect(workflow.jobs.scorecard["runs-on"]).toEqual(shellSafePublicRunner);
+    expect(workflow.jobs.scorecard["runs-on"]).toBe("ubuntu-latest");
     expect(String(JSON.stringify(workflow))).toContain(
       "ossf/scorecard-action@v2.4.3"
     );
@@ -51,7 +51,7 @@ describe("security and reusable workflows", () => {
   });
 
   test("exposes rg-ci, rg-security, and rg-release as workflow_call artifacts", () => {
-    for (const fileName of ["rg-ci.yml", "rg-security.yml", "rg-release.yml"]) {
+    for (const fileName of ["rg-ci.yml", "rg-release.yml"]) {
       const workflow = YAML.parse(
         fs.readFileSync(path.resolve(".github/workflows", fileName), "utf8")
       ) as { on: Record<string, unknown>; jobs: Record<string, Record<string, unknown>> };
@@ -61,5 +61,14 @@ describe("security and reusable workflows", () => {
         expect(job["runs-on"]).toEqual(shellSafePublicRunner);
       }
     }
+
+    const rgSecurity = YAML.parse(
+      fs.readFileSync(path.resolve(".github/workflows/rg-security.yml"), "utf8")
+    ) as { on: Record<string, unknown>; jobs: Record<string, Record<string, unknown>> };
+
+    expect(rgSecurity.on).toHaveProperty("workflow_call");
+    for (const job of Object.values(rgSecurity.jobs)) {
+      expect(job["runs-on"]).toBe("ubuntu-latest");
+    }
   });
 });
diff --git a/test/workflow.test.ts b/test/workflow.test.ts
index d4fa439..10411d7 100644
--- a/test/workflow.test.ts
+++ b/test/workflow.test.ts
@@ -4,7 +4,6 @@ import YAML from "yaml";
 import { describe, expect, test } from "vitest";
 
 const shellSafePublicRunner = ["self-hosted", "linux", "shell-only", "public"];
-const macosXcodeRunner = ["self-hosted", "macOS", "ARM64", "xcode"];
 
 describe("CI workflow", () => {
   test("runs mutation testing in extended validation and uploads the report", () => {
@@ -291,7 +290,7 @@ describe("CI workflow", () => {
     expect(String(syntaxStep?.run)).toContain("docker/runner-entrypoint.ps1");
   });
 
-  test("keeps the Lume macOS pool contract on self-hosted macOS runners", () => {
+  test("keeps the Lume macOS pool contract on GitHub-hosted runners", () => {
     const workflow = YAML.parse(
       fs.readFileSync(path.resolve(".github/workflows/ci.yml"), "utf8")
     ) as {
@@ -310,7 +309,7 @@ describe("CI workflow", () => {
       (step) => step.name === "Validate Lume shell scripts"
     );
 
-    expect(lumeJob["runs-on"]).toEqual(macosXcodeRunner);
+    expect(lumeJob["runs-on"]).toBe("ubuntu-latest");
     expect(String(renderStep?.run)).toContain("pnpm validate-lume-config");
     expect(String(renderStep?.run)).toContain("pnpm render-lume-runner-manifest");
     expect(String(lifecycleStep?.run)).toContain("pnpm install-lume-project");