fix(lease): raise capability-probe timeout to 10s on both halves (#869) (#1207)

packages/mosaic/src/commands/lease-activation-probe.ts

@@ -55,6 +55,19 @@ export const LEASE_ACTIVATION_CAPABILITY: LeaseActivationCapability = {
 /** Hidden CLI probe subcommand name — wired via {@link registerLeaseCapabilityProbe}. */
 export const LEASE_CAPABILITY_PROBE_COMMAND = '__lease-capability';
 
+/**
+ * Budget for the out-of-process capability probe. The probe launches a fresh
+ * Node process on the built CLI entrypoint, whose cold start alone measures
+ * 2.2-2.3s on a mid-range workstation (sb-it-1-dt, 2026-08-13) — so the
+ * previous 2s budget made the probe time out and report NO capability on
+ * such hosts, failing every launch with the #869 skew message even though
+ * the capability matched. The timeout only bounds the pathological hang
+ * case; the happy path returns as soon as the probe exits. Mirrors
+ * PROBE_TIMEOUT_SECONDS in the enforcement half
+ * (framework/tools/lease-broker/activation_version_gate.py).
+ */
+export const LEASE_CAPABILITY_PROBE_TIMEOUT_MS = 10_000;
+
 function capabilityMatches(candidate: LeaseActivationCapability | null): boolean {
   return (
     candidate !== null &&
@@ -110,12 +123,28 @@ export function defaultResolveCliEntry(
   return join(dirname(mainEntry), 'cli.js');
 }
 
+/** Narrow injectable seam for the synchronous child process used by the
+ * capability probe. */
+export type CapabilityProbeExecFile = (
+  file: string,
+  args: string[],
+  options: {
+    encoding: BufferEncoding;
+    timeout: number;
+    stdio: ['ignore', 'pipe', 'ignore'];
+  },
+) => string;
+
 /** Injectable inputs for {@link defaultCapabilityProbe}. */
 export interface CapabilityProbeDeps {
   /** Resolve the CLI entrypoint (`cli.js`) to probe. Defaults to
    * {@link defaultResolveCliEntry}. Inject to point at an isolated scratch
    * location in tests — never at the real package's `dist/`. */
   resolveCliEntry?: () => string;
+  /** Execute the resolved CLI entrypoint. Defaults to the real
+   * `execFileSync`. Inject so transport behavior and options can be tested
+   * without spawning a process. */
+  execFile?: CapabilityProbeExecFile;
 }
 
 /**
@@ -139,9 +168,10 @@ export function defaultCapabilityProbe(
     const cliEntry = resolveCliEntry();
     if (!existsSync(cliEntry)) return null;
 
-    const output = execFileSync(process.execPath, [cliEntry, LEASE_CAPABILITY_PROBE_COMMAND], {
+    const execFile: CapabilityProbeExecFile = deps.execFile ?? execFileSync;
+    const output = execFile(process.execPath, [cliEntry, LEASE_CAPABILITY_PROBE_COMMAND], {
       encoding: 'utf-8',
-      timeout: 2000,
+      timeout: LEASE_CAPABILITY_PROBE_TIMEOUT_MS,
       stdio: ['ignore', 'pipe', 'ignore'],
     });