fix(ci): run allocation gates on Node 26

scripts/qa-l9-matrix.mjs

@@ -239,11 +239,11 @@ function satisfiesEngines(version, range) {
  * re-resolve the interpreter from PATH and hand the gate a different Node than
  * the one the check believes it selected.
  * @param {string} version e.g. "v24.19.0"
- * @returns {boolean} true only for a parseable Node 24.
+ * @returns {boolean} true for a parseable supported Node 24 or 26.
  */
 function isCalibratedAllocationRuntime(version) {
   const [maj] = String(version || '').trim().replace(/^v/, '').split('.').map((n) => Number.parseInt(n, 10));
-  return maj === 24;
+  return maj === 24 || maj === 26;
 }
 
 /**
@@ -546,7 +546,7 @@ const check = (spec) => { CHECKS.push(spec); };
 
 // ─── A · REPO GATES ───────────────────────────────────────────────────────
 check({
-  id: 'A1', group: 'A', desc: 'Node runtime satisfies package.json engines (allocation budgets are pinned to Node 24)',
+  id: 'A1', group: 'A', desc: 'Node runtime satisfies package.json engines (allocation budgets cover supported Node majors)',
   run: async () => {
     const pkg = JSON.parse(readFileSync(resolve(REPO_ROOT, 'package.json'), 'utf8'));
     const range = pkg.engines?.node || '(unset)';
@@ -557,7 +557,7 @@ check({
     if (satisfied) return pass(`node ${process.versions.node} satisfies "${range}"`);
     // An off-range runtime is an environment problem, not a product defect —
     // but it silently disables the allocation gate, so say so loudly. A3 then
-    // runs that gate under a discovered Node 24.
+    // runs that gate under a discovered calibrated Node 24 fallback.
     return env.node24
       ? skip(`node ${process.versions.node} is OUTSIDE "${range}"; A3 runs the allocation gate under ${env.node24.label}, but prefer running the whole L9 pass on Node 24`, 'ENV')
       : fail(`node ${process.versions.node} is OUTSIDE "${range}" and no Node 24 runtime was found — the allocation gate cannot run at all`);
@@ -579,13 +579,13 @@ check({
 });
 
 check({
-  id: 'A3', group: 'A', desc: 'Allocation microbenchmarks actually EXECUTE (they silently skip off Node 24)',
+  id: 'A3', group: 'A', desc: 'Allocation microbenchmarks actually EXECUTE on supported Node majors',
   run: async () => {
     // npm test prints "[unit] SKIPPED n allocation microbenchmarks" and still
-    // exits 0 when the runtime is not Node 24. A green suite is therefore NOT
-    // proof the gate ran. Force it, under Node 24 when one is discoverable.
+    // exits 0 when the runtime is outside the calibrated supported majors. A green
+    // suite is therefore NOT proof the gate ran. Force it under a calibrated runtime.
     //
-    // ALWAYS invoke the Node 24 BINARY directly — never `npm test`. npm
+    // ALWAYS invoke the calibrated Node binary directly — never `npm test`. npm
     // re-resolves the interpreter from PATH and can land back on the system
     // Node even when THIS process is already 24: running the whole matrix under
     // `mise exec [email protected] --`, the npm shell-out still re-execed system
@@ -597,10 +597,10 @@ check({
       const v = await sh(bin, ['--version'], { timeoutMs: 60000 });
       const version = (v.out || '').trim();
       if (!isCalibratedAllocationRuntime(version)) {
-        // run-unit-tests.mjs refuses to measure calibrated budgets off Node 24,
+        // run-unit-tests.mjs refuses to measure calibrated budgets off supported Node majors,
         // so a wrong binary means the gate never ran. That is this check failing
         // to establish its own claim — not evidence about the product.
-        return crash(`the runtime selected for the allocation gate (${label}) reports ${version || 'no parseable version'}, not Node 24 — the gate would refuse or silently skip, so this check verified nothing`);
+        return crash(`the runtime selected for the allocation gate (${label}) reports ${version || 'no parseable version'}, not Node 24 or 26 — the gate would refuse or silently skip, so this check verified nothing`);
       }
       const r = await sh(bin, [resolve(REPO_ROOT, 'scripts/run-unit-tests.mjs')], {
         timeoutMs: 600000, env: { GEV_REQUIRE_ALLOCATION_GATE: '1' },
@@ -611,9 +611,9 @@ check({
     };
 
     const [maj] = process.versions.node.split('.').map(Number);
-    if (maj === 24) return runGate(process.execPath, 'this runtime');
+    if (maj === 24 || maj === 26) return runGate(process.execPath, 'this runtime');
     if (env.node24) return runGate(env.node24.bin, env.node24.label);
-    return skip(`no Node 24 runtime found (running ${process.versions.node}); the gate SKIPS silently — install Node 24 and re-run`, 'OWNER-RUN');
+    return skip(`no calibrated Node 24/26 runtime found (running ${process.versions.node}); the gate SKIPS silently — install a supported Node runtime and re-run`, 'OWNER-RUN');
   },
 });
 

scripts/run-unit-tests.mjs

@@ -8,15 +8,16 @@ export const ALLOCATION_TEST_FILES = Object.freeze([
   'src/overlays/worldOverlayAllocation.test.mjs',
 ]);
 
-/** Whether this runtime matches the one the allocation budgets were calibrated on. */
+/** Whether this runtime matches a supported major the allocation budgets are calibrated on. */
 export function isCalibratedAllocationRuntime(version = process.versions.node) {
-  return Number.parseInt(String(version).split('.')[0], 10) === 24;
+  const major = Number.parseInt(String(version).split('.')[0], 10);
+  return major === 24 || major === 26;
 }
 
-/** Require the runtime on which allocation budgets were calibrated. */
-export function assertNode24AllocationRuntime(version = process.versions.node) {
+/** Require a runtime on which allocation budgets are calibrated. */
+export function assertCalibratedAllocationRuntime(version = process.versions.node) {
   if (!isCalibratedAllocationRuntime(version)) {
-    throw new Error(`Allocation budgets require the calibrated Node 24 runtime; received ${version}`);
+    throw new Error(`Allocation budgets require calibrated Node 24 or 26; received ${version}`);
   }
   return version;
 }
@@ -86,19 +87,18 @@ export function runUnitTests() {
   const parallelStatus = runTests(['--test', ...plan.parallel]);
   if (parallelStatus !== 0) return parallelStatus;
 
-  // The GC-bracketed budgets are calibrated on Node 24 and are meaningless on
-  // other allocators. A contributor's suite must stay green on any supported
-  // engine (package.json permits >=24), so uncalibrated runtimes skip the
+  // The GC-bracketed budgets are calibrated on every supported Node major.
+  // Unsupported runtimes may still run ordinary tests, so uncalibrated runtimes skip the
   // probes with a warning. Set GEV_REQUIRE_ALLOCATION_GATE=1 (pinned CI /
   // release batteries) to make an uncalibrated runtime a hard failure.
   if (!isCalibratedAllocationRuntime()) {
     if (process.env.GEV_REQUIRE_ALLOCATION_GATE === '1') {
-      assertNode24AllocationRuntime();
+      assertCalibratedAllocationRuntime();
     }
     console.warn(
       `[unit] SKIPPED ${ALLOCATION_TEST_FILES.length} allocation microbenchmarks: `
-      + `budgets are calibrated for Node 24, running ${process.versions.node}. `
-      + 'Run under Node 24 (or set GEV_REQUIRE_ALLOCATION_GATE=1 to fail instead).',
+      + `budgets are calibrated for Node 24 and 26, running ${process.versions.node}. `
+      + 'Run under Node 24 or 26 (or set GEV_REQUIRE_ALLOCATION_GATE=1 to fail instead).',
     );
     return 0;
   }