diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 44f11bf580d21..25324e1cdd8e6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -375,8 +375,6 @@ jobs:
           TEST_PACKAGES: ${{ needs.changes.outputs.test_packages }}
         run: |
           set -o pipefail
-          # LastCode scripts invoke CLIs that require Node ^24.13.1.
-          vp env use 24.13.1
           filters=(--filter '!t3' --filter '!@t3tools/monorepo' --filter '!@t3tools/web')
           if [[ -n "$TEST_PACKAGES" ]]; then
             filters=()
diff --git a/.github/workflows/server-test-pilot-worker.yml b/.github/workflows/server-test-pilot-worker.yml
index ae7b51e4300a6..b559d4d17c755 100644
--- a/.github/workflows/server-test-pilot-worker.yml
+++ b/.github/workflows/server-test-pilot-worker.yml
@@ -31,9 +31,9 @@ jobs:
           install-args: --frozen-lockfile
       - name: Select checkpoint pilot Node runtime
         run: |
-          vp env use 24.13.1
-          echo 'VP_NODE_VERSION=24.13.1' >> "$GITHUB_ENV"
-          vp env exec --node 24.13.1 node -p 'require("node:path").dirname(process.execPath)' >> "$GITHUB_PATH"
+          vp env use 26.12.1
+          echo 'VP_NODE_VERSION=26.12.1' >> "$GITHUB_ENV"
+          vp env exec --node 26.12.1 node -p 'require("node:path").dirname(process.execPath)' >> "$GITHUB_PATH"
       - name: Install Chromium and system dependencies
         run: node apps/server/node_modules/playwright-core/cli.js install --with-deps --only-shell chromium
       - name: Run uncached cohort
diff --git a/README.md b/README.md
index b55a27143bf20..118246303b1b7 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ git clone git@github.com:YOUR_GITHUB_USER/LastCode.git ~/projects/lastCode
 cd ~/projects/lastCode
 git switch lastcode/main
 git remote add upstream https://github.com/pingdotgg/t3code.git
-mise exec node@24.13.1 -- node scripts/lastcode-setup.mjs \
+mise exec node@26.12.1 -- node scripts/lastcode-setup.mjs \
   --enable-nightly-writes \
   --checkpoint-interval-seconds "$LASTCODE_CHECKPOINT_INTERVAL_SECONDS"
 ```
diff --git a/apps/server/src/cli/projectActionReconciliation.test.ts b/apps/server/src/cli/projectActionReconciliation.test.ts
index ced809b9c1a45..1e15d97c2bc71 100644
--- a/apps/server/src/cli/projectActionReconciliation.test.ts
+++ b/apps/server/src/cli/projectActionReconciliation.test.ts
@@ -11,14 +11,14 @@ import {
 const waitDeclaration = {
   id: "lc-wait-for-checkpoint",
   name: "Wait for Checkpoint",
-  command: "mise exec node@24.13.1 -- node scripts/lastcode-wait-for-checkpoint.ts",
+  command: "mise exec node@26.12.1 -- node scripts/lastcode-wait-for-checkpoint.ts",
   icon: "test" as const,
 };
 
 const quickDeclaration = {
   id: "lc-local-ci",
   name: "Run Quick CI",
-  command: "mise exec node@24.13.1 -- node scripts/lastcode-local-ci.ts --quick",
+  command: "mise exec node@26.12.1 -- node scripts/lastcode-local-ci.ts --quick",
   icon: "test" as const,
 };
 
diff --git a/docs/lastcode/nightly-workflow.md b/docs/lastcode/nightly-workflow.md
index 28ce48eb5c136..2e4ea7a7c6292 100644
--- a/docs/lastcode/nightly-workflow.md
+++ b/docs/lastcode/nightly-workflow.md
@@ -480,7 +480,7 @@ the dedicated automation worktree in `~/.lastcode/dashboard.json`, so the
 command works from any directory without depending on a human development
 worktree. Installation fails instead of recording the current checkout when the
 automation worktree is missing. The installed launcher uses the repository's
-pinned Node 24 runtime through `mise`, independent of the shell's default Node.
+pinned Node runtime through `mise`, independent of the shell's default Node.
 
 Show the latest eight checkpoint activities, or choose another count:
 
diff --git a/docs/lastcode/release.md b/docs/lastcode/release.md
index f44872a117bdc..43d3d40411463 100644
--- a/docs/lastcode/release.md
+++ b/docs/lastcode/release.md
@@ -475,7 +475,7 @@ For an authorized local Apple Silicon build, first select one exact installable
 checkpoint or revision in the requesting thread's worktree:
 
 ```bash
-MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node "$T3CODE_PROJECT_ROOT/scripts/lastcode-build-local-package.ts" select \
+MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node "$T3CODE_PROJECT_ROOT/scripts/lastcode-build-local-package.ts" select \
   --tag lastcode/revision/v0.0.34-nightly.20260825.1185.3
 ```
 
diff --git a/docs/lastcode/setup.md b/docs/lastcode/setup.md
index 93d6282009de3..bb4439e03d296 100644
--- a/docs/lastcode/setup.md
+++ b/docs/lastcode/setup.md
@@ -53,7 +53,7 @@ git remote add upstream https://github.com/pingdotgg/t3code.git
 Run the guarded bootstrap from the checkout:
 
 ```bash
-MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-setup.mjs \
+MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-setup.mjs \
   --enable-nightly-writes \
   --checkpoint-daily-at "$LASTCODE_CHECKPOINT_DAILY_AT" \
   --checkpoint-time-zone "$LASTCODE_CHECKPOINT_TIME_ZONE"
diff --git a/package.json b/package.json
index fcb4de21add29..77bd697c69483 100644
--- a/package.json
+++ b/package.json
@@ -58,29 +58,29 @@
     "dist:desktop:win:arm64": "node scripts/build-desktop-artifact.ts --platform win --target nsis --arch arm64",
     "dist:desktop:win:x64": "node scripts/build-desktop-artifact.ts --platform win --target nsis --arch x64",
     "release:smoke": "node scripts/release-smoke.ts",
-    "lastcode:checkpoint": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-checkpoint.ts",
-    "lastcode:carry-set": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-carry-set.ts",
-    "lastcode:checkpoints": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-checkpoints.mjs",
-    "lastcode:build": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-build.mjs",
-    "lastcode:install": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-install.mjs",
-    "lastcode:intel-build": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-build-intel-package.ts",
-    "lastcode:intel-stage": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-intel-stage.mjs",
-    "lastcode:managed-checkout": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-managed-checkout.mjs",
-    "lastcode:project-actions": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-project-actions.mjs",
-    "lastcode:headless-service": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-headless-service.mjs",
-    "lastcode:setup": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-setup.mjs",
-    "lastcode:checkpoint:service": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-nightly-service.ts",
-    "lastcode:build:mac:arm64": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-build-mac.ts --arch arm64",
-    "lastcode:build:mac:x64": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-build-mac.ts --arch x64",
-    "lastcode:ci": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-local-ci.ts --full",
-    "lastcode:ci:quick": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-local-ci.ts --quick",
-    "lastcode:merge": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-merge.ts",
+    "lastcode:checkpoint": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-checkpoint.ts",
+    "lastcode:carry-set": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-carry-set.ts",
+    "lastcode:checkpoints": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-checkpoints.mjs",
+    "lastcode:build": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-build.mjs",
+    "lastcode:install": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-install.mjs",
+    "lastcode:intel-build": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-build-intel-package.ts",
+    "lastcode:intel-stage": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-intel-stage.mjs",
+    "lastcode:managed-checkout": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-managed-checkout.mjs",
+    "lastcode:project-actions": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-project-actions.mjs",
+    "lastcode:headless-service": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-headless-service.mjs",
+    "lastcode:setup": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-setup.mjs",
+    "lastcode:checkpoint:service": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-nightly-service.ts",
+    "lastcode:build:mac:arm64": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-build-mac.ts --arch arm64",
+    "lastcode:build:mac:x64": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-build-mac.ts --arch x64",
+    "lastcode:ci": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-local-ci.ts --full",
+    "lastcode:ci:quick": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-local-ci.ts --quick",
+    "lastcode:merge": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-merge.ts",
     "lastcode:docs:check": "node scripts/lastcode-docs-features.ts --check",
     "lastcode:docs:readme": "node scripts/lastcode-docs-features.ts --write-readme",
-    "lastcode:docs:fixtures": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-public-doc-fixtures.ts",
+    "lastcode:docs:fixtures": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-public-doc-fixtures.ts",
     "clean": "rm -rf node_modules apps/*/node_modules packages/*/node_modules apps/*/dist apps/*/dist-electron packages/*/dist .vite-plus apps/*/.vite-plus packages/*/.vite-plus",
     "sync:repos": "node scripts/sync-reference-repos.ts",
-    "lastcode:pr-gates": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-pr-gates.ts"
+    "lastcode:pr-gates": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-pr-gates.ts"
   },
   "devDependencies": {
     "@coderabbitai/config": "1.2.0",
diff --git a/scripts/lastcode-build.mjs b/scripts/lastcode-build.mjs
index 63114c87f4848..afdfcef4e7c81 100644
--- a/scripts/lastcode-build.mjs
+++ b/scripts/lastcode-build.mjs
@@ -144,7 +144,7 @@ function shellQuote(value) {
 }
 
 export function renderLauncher(modulePath) {
-  return `#!/bin/sh\n# ${BUILD_MANAGED_MARKER}\nexec env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node ${shellQuote(modulePath)} "$@"\n`;
+  return `#!/bin/sh\n# ${BUILD_MANAGED_MARKER}\nexec env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node ${shellQuote(modulePath)} "$@"\n`;
 }
 
 function runGit(repoRoot, args) {
@@ -392,7 +392,7 @@ export function installCommandAssets(automationWorktree, home) {
   );
   replaceManagedSymlink(exposed, target);
 
-  console.log(`Installed ${target} with the pinned Node 24 runtime`);
+  console.log(`Installed ${target} with the pinned Node runtime`);
   console.log(`Exposed on PATH as ${exposed}`);
 }
 
diff --git a/scripts/lastcode-build.test.mjs b/scripts/lastcode-build.test.mjs
index 8da2ebd417d57..8a5da27bc4833 100644
--- a/scripts/lastcode-build.test.mjs
+++ b/scripts/lastcode-build.test.mjs
@@ -314,7 +314,7 @@ describe("LastCode userland build command", () => {
 
   it("launches with the repository's pinned Node runtime", () => {
     expect(renderLauncher("/tmp/Last Code/lastcode-build.mjs")).toContain(
-      "env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node '/tmp/Last Code/lastcode-build.mjs' \"$@\"",
+      "env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node '/tmp/Last Code/lastcode-build.mjs' \"$@\"",
     );
   });
 });
diff --git a/scripts/lastcode-checkpoints.mjs b/scripts/lastcode-checkpoints.mjs
index 15633ed786b25..a73b7c15170a3 100644
--- a/scripts/lastcode-checkpoints.mjs
+++ b/scripts/lastcode-checkpoints.mjs
@@ -756,7 +756,7 @@ function readCarryReplayPlan(worktree) {
 }
 
 export function renderLauncher(modulePath) {
-  return `#!/bin/sh\nexec env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node ${shellQuote(modulePath)} "$@"\n`;
+  return `#!/bin/sh\nexec env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node ${shellQuote(modulePath)} "$@"\n`;
 }
 
 function installCommand(repoRoot, home) {
@@ -790,7 +790,7 @@ function installCommand(repoRoot, home) {
     NodeFS.unlinkSync(exposed);
   }
   NodeFS.symlinkSync(target, exposed);
-  console.log(`Installed ${target} with the pinned Node 24 runtime`);
+  console.log(`Installed ${target} with the pinned Node runtime`);
   console.log(`Exposed on PATH as ${exposed}`);
 }
 
diff --git a/scripts/lastcode-checkpoints.test.mjs b/scripts/lastcode-checkpoints.test.mjs
index 41774e0174fde..11d4a3f2dad62 100644
--- a/scripts/lastcode-checkpoints.test.mjs
+++ b/scripts/lastcode-checkpoints.test.mjs
@@ -185,7 +185,7 @@ describe("LastCode checkpoint dashboard", () => {
       NodeFS.rmSync(directory, { recursive: true, force: true });
     }
     expect(renderLauncher("/tmp/Last Code/checkpoints.mjs")).toContain(
-      "env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node '/tmp/Last Code/checkpoints.mjs' \"$@\"",
+      "env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node '/tmp/Last Code/checkpoints.mjs' \"$@\"",
     );
   });
 
diff --git a/scripts/lastcode-ci-workflow.test.ts b/scripts/lastcode-ci-workflow.test.ts
index 850ee648aeb9e..acdaec68f401d 100644
--- a/scripts/lastcode-ci-workflow.test.ts
+++ b/scripts/lastcode-ci-workflow.test.ts
@@ -252,7 +252,7 @@ describe("LastCode GitHub CI workflow", () => {
   it.each([
     { packages: "", filters: ["!t3", "!@t3tools/monorepo", "!@t3tools/web"] },
     { packages: "@t3tools/scripts", filters: ["@t3tools/scripts"] },
-  ])("selects the supported Node before testing packages '$packages'", ({ packages, filters }) => {
+  ])("tests packages '$packages' on the project Node", ({ packages, filters }) => {
     const steps = asRecord(asRecord(asRecord(parse(workflow))?.jobs)?.test)?.steps;
     if (!Array.isArray(steps)) throw new Error("CI test job is missing its steps.");
     const script = steps.map(asRecord).find((step) => step?.name === "Test")?.run;
@@ -265,7 +265,6 @@ describe("LastCode GitHub CI workflow", () => {
     );
     expect(result.status, result.stderr).toBe(0);
     expect(result.stdout.trim().split("\n")).toEqual([
-      "env use 24.13.1",
       `run --parallel --concurrency-limit 4 ${filters.map((filter) => `--filter ${filter}`).join(" ")} test`,
     ]);
   });
diff --git a/scripts/lastcode-install.mjs b/scripts/lastcode-install.mjs
index 0eca24ff579a2..6b24247455781 100644
--- a/scripts/lastcode-install.mjs
+++ b/scripts/lastcode-install.mjs
@@ -34,7 +34,7 @@ function shellQuote(value) {
 }
 
 export function renderLauncher(modulePath) {
-  return `#!/bin/sh\n# ${INSTALL_MANAGED_MARKER}\nexec env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node ${shellQuote(modulePath)} "$@"\n`;
+  return `#!/bin/sh\n# ${INSTALL_MANAGED_MARKER}\nexec env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node ${shellQuote(modulePath)} "$@"\n`;
 }
 
 export function parseOptions(argv) {
@@ -959,7 +959,7 @@ export function installCommand(home) {
   NodeFS.writeFileSync(target, renderLauncher(moduleTarget), { encoding: "utf8", mode: 0o755 });
   NodeFS.chmodSync(target, 0o755);
   replaceManagedSymlink(exposed, target);
-  console.log(`Installed ${target} with the pinned Node 24 runtime`);
+  console.log(`Installed ${target} with the pinned Node runtime`);
   console.log(`Exposed on PATH as ${exposed}`);
 }
 
diff --git a/scripts/lastcode-install.test.mjs b/scripts/lastcode-install.test.mjs
index f0bf41bd778d0..87346b46ebf52 100644
--- a/scripts/lastcode-install.test.mjs
+++ b/scripts/lastcode-install.test.mjs
@@ -985,7 +985,7 @@ describe("LastCode userland install command", () => {
 
   it("launches with the repository's pinned Node runtime", () => {
     expect(renderLauncher("/tmp/Last Code/lastcode-install.mjs")).toContain(
-      "env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node '/tmp/Last Code/lastcode-install.mjs' \"$@\"",
+      "env MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node '/tmp/Last Code/lastcode-install.mjs' \"$@\"",
     );
   });
 
diff --git a/scripts/lastcode-intel-release.test.mjs b/scripts/lastcode-intel-release.test.mjs
index 0d28931defcea..589c718a1934d 100644
--- a/scripts/lastcode-intel-release.test.mjs
+++ b/scripts/lastcode-intel-release.test.mjs
@@ -180,7 +180,7 @@ describe("immutable Intel release validation", () => {
       id: "lc-build-intel-package",
       name: "Build Intel package (macOS)",
       command:
-        "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-build-intel-package.ts run",
+        "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-build-intel-package.ts run",
       icon: "build",
     });
     const automationCheckout = workflow.slice(
diff --git a/scripts/lastcode-local-ci.test.ts b/scripts/lastcode-local-ci.test.ts
index 2b586ac1a4bd5..74fe6108929fc 100644
--- a/scripts/lastcode-local-ci.test.ts
+++ b/scripts/lastcode-local-ci.test.ts
@@ -305,11 +305,16 @@ describe("lastcode-local-ci", () => {
     expect(hook).toContain("lastcode:ci:quick -- --pre-push");
   });
 
-  it("requires the repository's supported Node release line", () => {
+  it("requires engines.node, or ^24.13.1 during the transition", () => {
+    const enginesNode: string = JSON.parse(
+      NodeFS.readFileSync(NodePath.join(import.meta.dirname, "..", "package.json"), "utf8"),
+    ).engines.node;
+    expect(() => assertSupportedNodeVersion(enginesNode)).not.toThrow();
     expect(() => assertSupportedNodeVersion("24.13.1")).not.toThrow();
     expect(() => assertSupportedNodeVersion("24.99.0")).not.toThrow();
-    expect(() => assertSupportedNodeVersion("24.13.0")).toThrow("Node ^24.13.1");
-    expect(() => assertSupportedNodeVersion("26.7.0")).toThrow("Node ^24.13.1");
+    expect(() => assertSupportedNodeVersion("24.13.0")).toThrow(`Node ${enginesNode}`);
+    expect(() => assertSupportedNodeVersion("26.7.0")).toThrow(`Node ${enginesNode}`);
+    expect(() => assertSupportedNodeVersion("25.0.0")).toThrow(`Node ${enginesNode}`);
   });
 
   it("defaults to the full gate and supports the quick pre-push gate", () => {
@@ -330,6 +335,7 @@ describe("lastcode-local-ci", () => {
       prePush: false,
       requireLocal: true,
     });
+    expect(parseLocalCiOptions(["--full", "--quick"]).mode).toBe("quick");
     expect(() => parseLocalCiOptions(["--require-local"])).toThrow("only supported with --quick");
     expect(() => parseLocalCiOptions(["--full", "--pre-push"])).toThrow(
       "only supported with --quick",
diff --git a/scripts/lastcode-local-update.mjs b/scripts/lastcode-local-update.mjs
index 58a15277a4464..741c6d7efe7b7 100644
--- a/scripts/lastcode-local-update.mjs
+++ b/scripts/lastcode-local-update.mjs
@@ -771,10 +771,14 @@ function resolveMise(home) {
 }
 
 export function resolveMiseNodeExecutable(cwd, mise, runCommand = run) {
-  const installRoot = runCommand(cwd, mise, ["where", "node@24.13.1"]);
+  // Older installable tags can require a different tooling runtime than engines.node.
+  const manifest = JSON.parse(NodeFS.readFileSync(NodePath.join(cwd, "package.json"), "utf8"));
+  const nodeTool = manifest.scripts["lastcode:ci"].match(/\bnode@\d+\.\d+\.\d+\b/u)?.[0];
+  if (!nodeTool) throw new Error("The target tag's lastcode:ci command must pin a Node runtime.");
+  const installRoot = runCommand(cwd, mise, ["where", nodeTool]);
   const executable = NodePath.join(installRoot, "bin", "node");
   if (!NodeFS.existsSync(executable)) {
-    throw new Error(`mise did not provide the expected Node 24 executable at ${executable}.`);
+    throw new Error(`mise did not provide the expected ${nodeTool} executable at ${executable}.`);
   }
   return executable;
 }
diff --git a/scripts/lastcode-local-update.test.ts b/scripts/lastcode-local-update.test.ts
index 6153081e3e094..0398e63e5a62e 100644
--- a/scripts/lastcode-local-update.test.ts
+++ b/scripts/lastcode-local-update.test.ts
@@ -175,15 +175,26 @@ describe("lastcode-local-update", () => {
     try {
       NodeFS.mkdirSync(NodePath.dirname(executable), { recursive: true });
       NodeFS.writeFileSync(executable, "");
-      assert.equal(
-        resolveMiseNodeExecutable("/build", "/mise", (cwd, command, args) => {
-          assert.equal(cwd, "/build");
-          assert.equal(command, "/mise");
-          assert.deepEqual(args, ["where", "node@24.13.1"]);
-          return root;
-        }),
-        executable,
-      );
+      for (const version of ["26.12.1", "24.13.1"]) {
+        NodeFS.writeFileSync(
+          NodePath.join(root, "package.json"),
+          JSON.stringify({
+            engines: { node: "26.12.1" },
+            scripts: {
+              "lastcode:ci": `MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@${version} -- node scripts/lastcode-local-ci.ts --full`,
+            },
+          }),
+        );
+        assert.equal(
+          resolveMiseNodeExecutable(root, "/mise", (cwd, command, args) => {
+            assert.equal(cwd, root);
+            assert.equal(command, "/mise");
+            assert.deepEqual(args, ["where", `node@${version}`]);
+            return root;
+          }),
+          executable,
+        );
+      }
     } finally {
       NodeFS.rmSync(root, { recursive: true, force: true });
     }
diff --git a/scripts/lastcode-main-write-lock.test.ts b/scripts/lastcode-main-write-lock.test.ts
index a942d71a373ac..4bc9e1a5c6ec8 100644
--- a/scripts/lastcode-main-write-lock.test.ts
+++ b/scripts/lastcode-main-write-lock.test.ts
@@ -363,6 +363,7 @@ JS`,
       vi.stubEnv("FIXTURE_REAL_GIT", realGit);
       vi.stubEnv("PATH", `${bin}${NodePath.delimiter}${process.env.PATH ?? ""}`);
       const hooks = NodePath.join(f.first, ".git", "hooks");
+      f.git(f.first, ["config", "core.hooksPath", hooks]);
       NodeFS.copyFileSync(
         NodePath.join(import.meta.dirname, "..", ".vite-hooks", "pre-push"),
         NodePath.join(hooks, "lastcode-pre-push"),
diff --git a/scripts/lastcode-nightly-service.test.ts b/scripts/lastcode-nightly-service.test.ts
index cec1551603800..34eb86de3ccf6 100644
--- a/scripts/lastcode-nightly-service.test.ts
+++ b/scripts/lastcode-nightly-service.test.ts
@@ -49,14 +49,14 @@ it("renders the deployment-defined interval in a source-only launch agent", () =
   const plist = renderLaunchAgentPlist({
     repoRoot: "/Users/example/LastCode & experiments",
     logDirectory: "/Users/example/.lastcode/automation",
-    nodePath: "/Users/example/.local/share/mise/installs/node/24.13.1/bin/node",
+    nodePath: "/Users/example/.local/share/mise/installs/node/26.12.1/bin/node",
     schedule: { kind: "interval", intervalSeconds: 1234 },
     scheduleHelperPath: "/Users/example/.lastcode/automation/bin/schedule helper.mjs",
     supervisorPath: "/Users/example/.lastcode/automation/bin/checkpoint supervisor.mjs",
   });
 
   expect(plist).toContain("<integer>1234</integer>");
-  expect(plist).toContain("node/24.13.1/bin/node");
+  expect(plist).toContain("node/26.12.1/bin/node");
   expect(plist).toContain("checkpoint supervisor.mjs");
   expect(plist).not.toContain("/bin/zsh");
   expect(plist).not.toContain("/usr/bin/env");
diff --git a/scripts/lastcode-node-launch.test.ts b/scripts/lastcode-node-launch.test.ts
index 302e54bef3100..f47ea511bc49b 100644
--- a/scripts/lastcode-node-launch.test.ts
+++ b/scripts/lastcode-node-launch.test.ts
@@ -13,31 +13,46 @@ const projectConfig = JSON.parse(
   NodeFS.readFileSync(new URL("../t3.json", import.meta.url), "utf8"),
 ) as { scripts: Array<{ name: string; command: string }> };
 
-function withLaunchFixture(run: (fixture: ReturnType<typeof createLaunchFixture>) => void) {
+function withLaunchFixture(
+  run: (fixture: ReturnType<typeof createLaunchFixture>) => void,
+  targetVersion = "26.12.1",
+) {
   const root = NodeFS.realpathSync(
     NodeFS.mkdtempSync(NodePath.join(NodeOS.tmpdir(), "lastcode node launch ")),
   );
   try {
-    run(createLaunchFixture(root));
+    run(createLaunchFixture(root, targetVersion));
   } finally {
     NodeFS.rmSync(root, { recursive: true, force: true });
   }
 }
 
-function createLaunchFixture(root: string) {
+function createLaunchFixture(root: string, targetVersion: string) {
   const cwd = NodePath.join(root, "checkout with spaces");
   const projectRoot = NodePath.join(root, "primary checkout with spaces");
   const pinnedBin = NodePath.join(root, "pinned bin");
+  const legacyBin = NodePath.join(root, "legacy pinned bin");
   const ambientBin = NodePath.join(root, "ambient bin");
   const toolBin = NodePath.join(root, "external tools");
   const checkoutBin = NodePath.join(cwd, "node_modules", ".bin");
-  for (const directory of [cwd, projectRoot, pinnedBin, ambientBin, toolBin, checkoutBin]) {
+  for (const directory of [
+    cwd,
+    projectRoot,
+    pinnedBin,
+    legacyBin,
+    ambientBin,
+    toolBin,
+    checkoutBin,
+  ]) {
     NodeFS.mkdirSync(directory, { recursive: true });
   }
   const pinnedNode = NodePath.join(pinnedBin, "node");
+  const legacyNode = NodePath.join(legacyBin, "node");
   // A copied executable gives process.execPath an observable identity independent of PATH shims.
   NodeFS.copyFileSync(process.execPath, pinnedNode);
   NodeFS.chmodSync(pinnedNode, 0o755);
+  NodeFS.copyFileSync(process.execPath, legacyNode);
+  NodeFS.chmodSync(legacyNode, 0o755);
   const writeExecutable = (path: string, source: string) => {
     NodeFS.writeFileSync(path, source, { mode: 0o755 });
   };
@@ -50,18 +65,31 @@ function createLaunchFixture(root: string) {
   writeExecutable(
     NodePath.join(toolBin, "mise"),
     `#!/bin/sh
-[ "$1" = exec ] && [ "$2" = node@24.13.1 ] && [ "$3" = -- ] || exit 90
+[ "$1" = exec ] && [ "$3" = -- ] || exit 90
+case "$2" in
+  node@26.12.1) selected="$FIXTURE_PINNED_BIN" ;;
+  node@24.13.1) selected="$FIXTURE_LEGACY_BIN" ;;
+  *) exit 90 ;;
+esac
 shift 3
 # Model mise restoring pristine PATH entries unless aggressive activation is explicit.
 if [ "$MISE_ACTIVATE_AGGRESSIVE" = 1 ]; then
-  PATH="$FIXTURE_PINNED_BIN:$FIXTURE_CHECKOUT_BIN:$FIXTURE_AMBIENT_BIN:/usr/bin:/bin"
+  PATH="$selected:$FIXTURE_CHECKOUT_BIN:$FIXTURE_TOOL_BIN:$FIXTURE_AMBIENT_BIN:/usr/bin:/bin"
 else
-  PATH="$FIXTURE_AMBIENT_BIN:$FIXTURE_CHECKOUT_BIN:$FIXTURE_PINNED_BIN:/usr/bin:/bin"
+  PATH="$FIXTURE_AMBIENT_BIN:$FIXTURE_CHECKOUT_BIN:$FIXTURE_TOOL_BIN:$selected:/usr/bin:/bin"
 fi
 export PATH
 exec "$@"
 `,
   );
+  NodeFS.writeFileSync(
+    NodePath.join(cwd, "package.json"),
+    JSON.stringify({
+      scripts: {
+        "lastcode:ci": `MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@${targetVersion} -- node scripts/lastcode-local-ci.ts --full`,
+      },
+    }),
+  );
   const leaf = `const { spawnSync } = require('node:child_process');
 const path = require('node:path');
 const grandchild = spawnSync('node', ['-e', 'console.log(JSON.stringify({ executable: process.execPath, version: process.version }))'], { encoding: 'utf8' });
@@ -82,6 +110,7 @@ process.exit(Number(name === process.env.FIXTURE_FAIL_LEAF ? process.env.FIXTURE
   return {
     cwd,
     pinnedNode,
+    ciNode: targetVersion === "24.13.1" ? legacyNode : pinnedNode,
     run(command: string, args: string[], failLeaf: string, exitCode: number) {
       const env: NodeJS.ProcessEnv = {
         ...process.env,
@@ -91,6 +120,8 @@ process.exit(Number(name === process.env.FIXTURE_FAIL_LEAF ? process.env.FIXTURE
         MISE_ACTIVATE_AGGRESSIVE: "0",
         T3CODE_PROJECT_ROOT: projectRoot,
         FIXTURE_PINNED_BIN: pinnedBin,
+        FIXTURE_LEGACY_BIN: legacyBin,
+        FIXTURE_TOOL_BIN: toolBin,
         FIXTURE_AMBIENT_BIN: ambientBin,
         FIXTURE_CHECKOUT_BIN: checkoutBin,
         FIXTURE_AMBIENT_NODE: process.execPath,
@@ -133,10 +164,12 @@ function expectPinned(
   records: ReturnType<ReturnType<typeof createLaunchFixture>["run"]>,
 ) {
   for (const record of records) {
-    expect(record.executable).toBe(fixture.pinnedNode);
+    const expectedNode =
+      record.name === "lastcode-local-ci.ts" ? fixture.ciNode : fixture.pinnedNode;
+    expect(record.executable).toBe(expectedNode);
     expect(record.version).toBe(process.version);
     expect(record.cwd).toBe(NodeFS.realpathSync(fixture.cwd));
-    expect(record.grandchild).toEqual({ executable: fixture.pinnedNode, version: process.version });
+    expect(record.grandchild).toEqual({ executable: expectedNode, version: process.version });
   }
 }
 
@@ -158,21 +191,44 @@ describe("saved LastCode Node launchers", () => {
   });
 
   it.each([
-    { failLeaf: "", exitCode: 0, runsCi: true },
-    { failLeaf: "prepare-dependencies.ts", exitCode: 29, runsCi: false },
-    { failLeaf: "lastcode-local-ci.ts", exitCode: 31, runsCi: true },
+    { targetVersion: "26.12.1", mode: "--quick", failLeaf: "", exitCode: 0, runsCi: true },
+    {
+      targetVersion: "26.12.1",
+      mode: "--quick",
+      failLeaf: "prepare-dependencies.ts",
+      exitCode: 29,
+      runsCi: false,
+    },
+    {
+      targetVersion: "26.12.1",
+      mode: "--quick",
+      failLeaf: "lastcode-local-ci.ts",
+      exitCode: 31,
+      runsCi: true,
+    },
+    { targetVersion: "24.13.1", mode: "--quick", failLeaf: "", exitCode: 0, runsCi: true },
+    { targetVersion: "24.13.1", mode: "--full", failLeaf: "", exitCode: 0, runsCi: true },
+    {
+      targetVersion: "24.13.1",
+      mode: "--full",
+      failLeaf: "lastcode-local-ci.ts",
+      exitCode: 31,
+      runsCi: true,
+    },
   ])(
-    "pins Run Quick CI preparation and execution ($failLeaf, exit $exitCode)",
-    ({ failLeaf, exitCode, runsCi }) => {
+    "pins preparation and uses target Node $targetVersion for $mode ($failLeaf, exit $exitCode)",
+    ({ targetVersion, mode, failLeaf, exitCode, runsCi }) => {
       withLaunchFixture((fixture) => {
-        const command = projectConfig.scripts.find(({ name }) => name === "Run Quick CI")!.command;
+        const command = projectConfig.scripts
+          .find(({ name }) => name === "Run Quick CI")!
+          .command.replace("--quick", mode);
         const records = fixture.run(command, [], failLeaf, exitCode);
+        expectPinned(fixture, records);
         expect(records.map(({ name, args }) => ({ name, args }))).toEqual([
           { name: "prepare-dependencies.ts", args: ["--for-ci"] },
-          ...(runsCi ? [{ name: "lastcode-local-ci.ts", args: ["--quick"] }] : []),
+          ...(runsCi ? [{ name: "lastcode-local-ci.ts", args: ["--full", mode] }] : []),
         ]);
-        expectPinned(fixture, records);
-      });
+      }, targetVersion);
     },
   );
 });
diff --git a/scripts/lastcode-setup.mjs b/scripts/lastcode-setup.mjs
index 42278eebdf9a2..13e10f0ee5d14 100644
--- a/scripts/lastcode-setup.mjs
+++ b/scripts/lastcode-setup.mjs
@@ -225,7 +225,7 @@ function main(argv) {
   const options = parseOptions(argv);
   if (options.help) {
     console.log(
-      "Usage: MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-setup.mjs --enable-nightly-writes (--checkpoint-interval-seconds <seconds> | --checkpoint-daily-at <HH:MM> --checkpoint-time-zone <IANA-zone>) [--trusted-project-action <lc-id>]... [--dry-run]",
+      "Usage: MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-setup.mjs --enable-nightly-writes (--checkpoint-interval-seconds <seconds> | --checkpoint-daily-at <HH:MM> --checkpoint-time-zone <IANA-zone>) [--trusted-project-action <lc-id>]... [--dry-run]",
     );
     console.log();
     console.log(
diff --git a/scripts/lib/lastcode-git.ts b/scripts/lib/lastcode-git.ts
index f6669e3571154..15eec379cfaf5 100644
--- a/scripts/lib/lastcode-git.ts
+++ b/scripts/lib/lastcode-git.ts
@@ -1,6 +1,7 @@
 // @effect-diagnostics nodeBuiltinImport:off -- Host-side Git helpers shared by local CI and the guarded merge.
 // No installed dependencies: lastcode:merge runs from checkouts without node_modules.
 import * as NodeChildProcess from "node:child_process";
+import * as NodeFS from "node:fs";
 import * as NodePath from "node:path";
 
 import { CiCommandFailure } from "./lastcode-ci-process.ts";
@@ -37,14 +38,22 @@ export function cleanGitEnvironment(
   );
 }
 
+const PROJECT_NODE_VERSION: string = JSON.parse(
+  NodeFS.readFileSync(NodePath.join(import.meta.dirname, "..", "..", "package.json"), "utf8"),
+).engines.node;
+
+// Transition: saved Project Actions in Settings still launch through `mise exec node@24.13.1`.
+// Remove the ^24.13.1 branch once they launch with the `engines.node` version.
+function isTransitionalNode24(major: number, minor: number, patch: number): boolean {
+  return major === 24 && (minor > 13 || (minor === 13 && patch >= 1));
+}
+
 export function assertSupportedNodeVersion(version = process.versions.node): void {
   const [major = 0, minor = 0, patch = 0] = version.split(".").map(Number);
-  const supported = major === 24 && (minor > 13 || (minor === 13 && patch >= 1));
-  if (!supported) {
-    throw new Error(
-      `LastCode local CI requires Node ^24.13.1, received ${version}. Run it through the package script so mise selects the project runtime.`,
-    );
-  }
+  if (version === PROJECT_NODE_VERSION || isTransitionalNode24(major, minor, patch)) return;
+  throw new Error(
+    `LastCode local CI requires Node ${PROJECT_NODE_VERSION} (root package.json engines.node) or ^24.13.1, received ${version}. Run it through the package script so mise selects the project runtime.`,
+  );
 }
 
 export function runProcess(
diff --git a/scripts/lib/server-test-pilot.mjs b/scripts/lib/server-test-pilot.mjs
index 2c8b46575c0d7..d254d6c41b460 100644
--- a/scripts/lib/server-test-pilot.mjs
+++ b/scripts/lib/server-test-pilot.mjs
@@ -3,7 +3,7 @@ import * as NodeAssert from "node:assert/strict";
 const transferTest = "integration/transferBudgetV2.integration.test.ts";
 
 export function assertPilotRuntime(version) {
-  NodeAssert.equal(version, "v24.13.1", "Pilot requires checkpoint Node v24.13.1");
+  NodeAssert.equal(version, "v26.12.1", "Pilot requires checkpoint Node v26.12.1");
 }
 
 function strictFingerprint({ cpu: _cpu, ...identity }) {
diff --git a/scripts/lib/server-test-pilot.test.mjs b/scripts/lib/server-test-pilot.test.mjs
index 443471a67bdf9..d41ee643c980b 100644
--- a/scripts/lib/server-test-pilot.test.mjs
+++ b/scripts/lib/server-test-pilot.test.mjs
@@ -11,8 +11,8 @@ function fixture() {
       cohort,
       fingerprint: {
         candidate: "candidate",
-        node: "v24.13.1",
-        testNode: "v24.13.1",
+        node: "v26.12.1",
+        testNode: "v26.12.1",
         cpu: "CPU family A",
         cpus: 4,
         memoryGiB: 16,
@@ -79,7 +79,7 @@ it("accepts complete disjoint cohorts and rejects unusable benchmark evidence",
       r[1].fingerprint[field] = "other";
     }),
     (r) => {
-      for (const receipt of r) receipt.fingerprint.node = receipt.fingerprint.testNode = "v26.12.1";
+      for (const receipt of r) receipt.fingerprint.node = receipt.fingerprint.testNode = "v24.13.1";
     },
     (r) => {
       r[1].discovery = ["other"];
diff --git a/scripts/prepare-dependencies.test.mjs b/scripts/prepare-dependencies.test.mjs
index f5a52892a94db..270ee8f62f3f9 100644
--- a/scripts/prepare-dependencies.test.mjs
+++ b/scripts/prepare-dependencies.test.mjs
@@ -13,7 +13,7 @@ const declarations = JSON.parse(
 function declaredLauncher(name) {
   const command = declarations.find((declaration) => declaration.name === name)?.command;
   const match = command?.match(
-    /^MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24\.13\.1 -- node -e "([^"]+)"$/,
+    /^MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26\.12\.1 -- node -e "([^"]+)"$/,
   );
   NodeAssert.ok(match, `${name} must use the pinned Node inline launcher`);
   return match[1];
@@ -22,7 +22,12 @@ function declaredLauncher(name) {
 function runDeclaredLauncher(name, target, anchor, env = {}) {
   return NodeChildProcess.spawnSync(process.execPath, ["-e", declaredLauncher(name)], {
     cwd: target,
-    env: { ...process.env, T3CODE_PROJECT_ROOT: anchor, ...env },
+    env: {
+      ...process.env,
+      PATH: `${NodePath.dirname(process.execPath)}${NodePath.delimiter}${process.env.PATH ?? ""}`,
+      T3CODE_PROJECT_ROOT: anchor,
+      ...env,
+    },
     encoding: "utf8",
   });
 }
@@ -177,6 +182,10 @@ function launcherFixture() {
     NodePath.join(target, "scripts", "lastcode-local-ci.ts"),
     child("ci", "FIXTURE_CI_STATUS"),
   );
+  NodeFS.writeFileSync(
+    NodePath.join(target, "package.json"),
+    JSON.stringify({ scripts: { "lastcode:ci": "node scripts/lastcode-local-ci.ts --full" } }),
+  );
   return { target, anchor };
 }
 
@@ -211,7 +220,7 @@ it("declared CI launcher stops after preparation failure and propagates CI failu
       .map((line) => JSON.parse(line)),
     [
       { kind: "prepare", cwd: target, args: ["--for-ci"] },
-      { kind: "ci", cwd: target, args: ["--quick"] },
+      { kind: "ci", cwd: target, args: ["--full", "--quick"] },
     ],
   );
   const success = runDeclaredLauncher("Run Quick CI", target, anchor);
diff --git a/scripts/server-test-pilot.ts b/scripts/server-test-pilot.ts
index 1bca38551e5c5..79c177bab85cf 100644
--- a/scripts/server-test-pilot.ts
+++ b/scripts/server-test-pilot.ts
@@ -8,7 +8,7 @@ import * as NodePath from "node:path";
 import * as NodeURL from "node:url";
 import { shardedTestFiles } from "./lib/sharded-tests.ts";
 
-NodeAssert.equal(process.version, "v24.13.1", "Pilot driver requires checkpoint Node v24.13.1");
+NodeAssert.equal(process.version, "v26.12.1", "Pilot driver requires checkpoint Node v26.12.1");
 
 const root = NodePath.resolve(import.meta.dirname, "..");
 const server = NodePath.join(root, "apps/server");
@@ -75,7 +75,7 @@ const result = NodeChildProcess.spawnSync(
       ...process.env,
       VP_REMOTE_CACHE: "off",
       VP_REMOTE_CACHE_URL: "",
-      VP_NODE_VERSION: "24.13.1",
+      VP_NODE_VERSION: "26.12.1",
       T3CODE_SERVER_PILOT_RUNTIME_PATH: runtimePath,
       T3CODE_TRANSFER_BUDGET_REPORT_PATH: NodePath.join(output, "transfer.md"),
       T3CODE_TRANSFER_BUDGET_RESULT_PATH: NodePath.join(output, "transfer.json"),
diff --git a/t3.json b/t3.json
index b8afad7f0871a..769953797f71d 100644
--- a/t3.json
+++ b/t3.json
@@ -10,38 +10,38 @@
     },
     {
       "name": "Setup Worktree",
-      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node -e \"const r=require('node:child_process').spawnSync(process.execPath,[require('node:path').join(process.env.T3CODE_PROJECT_ROOT,'scripts','setup-worktree.ts')],{stdio:'inherit'});if(r.error)console.error(r.error.message);process.exit(r.status??1);\"",
+      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node -e \"const r=require('node:child_process').spawnSync(process.execPath,[require('node:path').join(process.env.T3CODE_PROJECT_ROOT,'scripts','setup-worktree.ts')],{stdio:'inherit'});if(r.error)console.error(r.error.message);process.exit(r.status??1);\"",
       "icon": "configure",
       "runOnWorktreeCreate": true
     },
     {
       "id": "lc-prepare-dependencies",
       "name": "Prepare Dependencies",
-      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node -e \"const r=require('node:child_process').spawnSync(process.execPath,[require('node:path').join(process.env.T3CODE_PROJECT_ROOT,'scripts','prepare-dependencies.ts')],{stdio:'inherit'});if(r.error)console.error(r.error.message);process.exit(r.status??1);\"",
+      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node -e \"const r=require('node:child_process').spawnSync(process.execPath,[require('node:path').join(process.env.T3CODE_PROJECT_ROOT,'scripts','prepare-dependencies.ts')],{stdio:'inherit'});if(r.error)console.error(r.error.message);process.exit(r.status??1);\"",
       "icon": "configure"
     },
     {
       "id": "lc-wait-for-checkpoint",
       "name": "Wait for Checkpoint",
-      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node \"$T3CODE_PROJECT_ROOT/scripts/lastcode-wait-for-checkpoint.ts\"",
+      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node \"$T3CODE_PROJECT_ROOT/scripts/lastcode-wait-for-checkpoint.ts\"",
       "icon": "test"
     },
     {
       "id": "lc-local-ci",
       "name": "Run Quick CI",
-      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node -e \"for(const args of [[require('node:path').join(process.env.T3CODE_PROJECT_ROOT,'scripts','prepare-dependencies.ts'),'--for-ci'],['scripts/lastcode-local-ci.ts','--quick']]){const r=require('node:child_process').spawnSync(process.execPath,args,{stdio:'inherit'});if(r.error)console.error(r.error.message);if(r.status===0)continue;process.exit(r.status??1);}\"",
+      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node -e \"for(const [command,args] of [[process.execPath,[require('node:path').join(process.env.T3CODE_PROJECT_ROOT,'scripts','prepare-dependencies.ts'),'--for-ci']],['/bin/sh',['-c',JSON.parse(require('node:fs').readFileSync('package.json','utf8')).scripts['lastcode:ci']+' --quick']]]){const r=require('node:child_process').spawnSync(command,args,{stdio:'inherit'});if(r.error)console.error(r.error.message);if(r.status===0)continue;process.exit(r.status??1);}\"",
       "icon": "test"
     },
     {
       "id": "lc-build-local-package",
       "name": "Build Local Package",
-      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node \"$T3CODE_PROJECT_ROOT/scripts/lastcode-build-local-package.ts\" run",
+      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node \"$T3CODE_PROJECT_ROOT/scripts/lastcode-build-local-package.ts\" run",
       "icon": "build"
     },
     {
       "id": "lc-build-intel-package",
       "name": "Build Intel package (macOS)",
-      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@24.13.1 -- node scripts/lastcode-build-intel-package.ts run",
+      "command": "MISE_ACTIVATE_AGGRESSIVE=1 mise exec node@26.12.1 -- node scripts/lastcode-build-intel-package.ts run",
       "icon": "build"
     }
   ]