fix(codex): align primer warmup with fixed slots

src/codex-warmup.ts

@@ -33,6 +33,7 @@ interface CodexWarmupRuntimeOptions {
   nowMs?: number;
   statePath?: string;
   shouldSkip?: () => boolean;
+  ignoreZeroUsageWindow?: boolean;
 }
 
 export type CodexWarmupCycleResult =
@@ -105,6 +106,7 @@ function selectWarmupCandidate(
   config: CodexWarmupConfig,
   state: CodexWarmupState,
   nowMs: number,
+  options: { ignoreZeroUsageWindow?: boolean } = {},
 ): { accountIndex: number; zeroUsageWarmupUntil: string } | { reason: string } {
   const disabledUntilMs = parseTimestamp(state.disabledUntil);
   if (disabledUntilMs != null && disabledUntilMs > nowMs) {
@@ -134,7 +136,11 @@ function selectWarmupCandidate(
     const zeroUsageWarmupUntilMs = parseTimestamp(
       accountState?.zeroUsageWarmupUntil,
     );
-    if (zeroUsageWarmupUntilMs != null && zeroUsageWarmupUntilMs > nowMs) {
+    if (
+      !options.ignoreZeroUsageWindow &&
+      zeroUsageWarmupUntilMs != null &&
+      zeroUsageWarmupUntilMs > nowMs
+    ) {
       continue;
     }
 
@@ -144,10 +150,13 @@ function selectWarmupCandidate(
     }
 
     const resetD7Ms = parseTimestamp(account.resetD7At);
-    const zeroUsageWarmupUntilMsForState =
-      resetD7Ms != null && resetD7Ms > nowMs
-        ? resetD7Ms
-        : nowMs + DEFAULT_ZERO_USAGE_WARMUP_WINDOW_MS;
+    let zeroUsageWarmupUntilMsForState = nowMs;
+    if (!options.ignoreZeroUsageWindow) {
+      zeroUsageWarmupUntilMsForState =
+        resetD7Ms != null && resetD7Ms > nowMs
+          ? resetD7Ms
+          : nowMs + DEFAULT_ZERO_USAGE_WARMUP_WINDOW_MS;
+    }
 
     return {
       accountIndex: account.index,
@@ -254,7 +263,9 @@ export async function runCodexWarmupCycle(
   const nowIso = new Date(nowMs).toISOString();
   const statePath = runtime.statePath ?? DEFAULT_STATE_FILE;
   const state = readWarmupState(statePath);
-  const selected = selectWarmupCandidate(config, state, nowMs);
+  const selected = selectWarmupCandidate(config, state, nowMs, {
+    ignoreZeroUsageWindow: runtime.ignoreZeroUsageWindow,
+  });
   if ('reason' in selected) {
     return { status: 'skipped', reason: selected.reason };
   }