feat(primer): broaden Codex alignment hold to all real consumers; pre+post slot window

Address review gaps in the primer-alignment hold so the fixed-slot primer
reliably wins the first-request race for the shared Codex window:

- Extract the time-based hold into a dependency-free leaf module
  (codex-primer-alignment.ts) so every Codex path can share it without import
  cycles.
- Add a pre-slot hold window (2 min) in addition to the post-slot (5 min) and
  the 04-08 KST dawn gap, closing the "request a beat before the slot" gap.
- Hold the dashboard's periodic Codex warm-up too: runCodexWarmupCycle now
  skips during the hold unless called with isPrimer (the scheduled primer sets
  it), so the warm-up can't anchor the window ahead of the primer.
- Remove the urgent @-mention bypass on the reviewer/arbiter and owner holds —
  the reset is anchored unconditionally as requested.
- Reviewer/arbiter hold resumes exactly once after the window via the existing
  per-revision claim (poll re-detect; no double run).

Note: the unified lease boundary (syncHostCodexSessionFiles) is synchronous and
throws a terminal "Codex unavailable", so it can't host a clean defer+resume;
gating stays at the async turn-scheduling layer that can re-queue. Honest caveat
unchanged: making the primer first is necessary but not sufficient to pin a
trailing reset.

Verified: typecheck, build, bundle-smoke; full suite 1482 passing with only the
9 pre-existing env-config baseline failures (service-routing/paired-context/
migrate-room owner=claude vs codex-main); new alignment + warmup-hold tests pass.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/codex-primer-alignment.test.ts

@@ -0,0 +1,56 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  KST_OFFSET_MS,
+  msSincePreviousPrimerSlotKST,
+  msUntilNextPrimerSlotKST,
+  shouldHoldCodexForPrimerAlignment,
+} from './codex-primer-alignment.js';
+
+// nowMs such that the shifted KST clock reads the given hour/minute on a day.
+const atKst = (hour: number, minute = 0): number =>
+  Date.UTC(2026, 5, 9, hour, minute) - KST_OFFSET_MS;
+
+describe('codex-primer-alignment timing', () => {
+  it('measures ms until the next fixed slot (with day wrap)', () => {
+    expect(msUntilNextPrimerSlotKST(atKst(8, 0))).toBe(5 * 60 * 60 * 1000);
+    expect(msUntilNextPrimerSlotKST(atKst(12, 50))).toBe(10 * 60 * 1000);
+    // After the day's last slot → next slot is tomorrow's 08:00.
+    expect(msUntilNextPrimerSlotKST(atKst(23, 0))).toBe(9 * 60 * 60 * 1000);
+  });
+
+  it('measures ms since the most recent fixed slot (with day wrap)', () => {
+    expect(msSincePreviousPrimerSlotKST(atKst(8, 0))).toBe(0);
+    expect(msSincePreviousPrimerSlotKST(atKst(13, 30))).toBe(30 * 60 * 1000);
+    // Before the day's first slot → previous slot was yesterday's 23:00.
+    expect(msSincePreviousPrimerSlotKST(atKst(2, 0))).toBe(3 * 60 * 60 * 1000);
+  });
+
+  it('holds during the 04–08 KST dawn gap', () => {
+    expect(shouldHoldCodexForPrimerAlignment(atKst(4, 0))).toBe(true);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(5, 0))).toBe(true);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(7, 59))).toBe(true);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(3, 59))).toBe(false);
+  });
+
+  it('holds in the minutes just before each slot (pre-slot window)', () => {
+    // ≤2 min before the slot is held so a just-before call cannot anchor first.
+    expect(shouldHoldCodexForPrimerAlignment(atKst(12, 59))).toBe(true);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(17, 59))).toBe(true);
+    // 3 min before is outside the 2-min pre-window.
+    expect(shouldHoldCodexForPrimerAlignment(atKst(12, 57))).toBe(false);
+  });
+
+  it('holds briefly right after each fixed slot, then releases', () => {
+    expect(shouldHoldCodexForPrimerAlignment(atKst(8, 0))).toBe(true);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(13, 2))).toBe(true);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(13, 6))).toBe(false);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(18, 4))).toBe(true);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(23, 30))).toBe(false);
+  });
+
+  it('does not hold mid-window away from slots and the dawn gap', () => {
+    expect(shouldHoldCodexForPrimerAlignment(atKst(15, 0))).toBe(false);
+    expect(shouldHoldCodexForPrimerAlignment(atKst(2, 0))).toBe(false);
+  });
+});

src/codex-primer-alignment.ts

@@ -0,0 +1,99 @@
+/**
+ * Codex usage-primer alignment timing.
+ *
+ * The usage primer fires at fixed KST slots (08/13/18/23) to anchor the shared
+ * Codex 5h usage window. For the primer to actually pin the reset to a slot it
+ * must be the *first* Codex request after the previous window expires —
+ * otherwise an off-slot reviewer/arbiter/owner Codex turn (or the dashboard
+ * warm-up) anchors the window early and the reset drifts.
+ *
+ * So non-primer Codex execution is held during three time-based windows, so the
+ * scheduled primer wins the first-request race:
+ *
+ *   1. Dawn gap 04:00–08:00 KST. The 23:00 window resets ~04:00, leaving a 4h
+ *      hole before the 08:00 slot (the 23→08 span is 9h, longer than one 5h
+ *      window). Any Codex call in this hole anchors a stray window, so the
+ *      account is kept quiet until the 08:00 primer.
+ *   2. A couple of minutes *before* each slot, so a call started a beat before
+ *      the slot (against an already-reset window) cannot anchor first.
+ *   3. A few minutes *after* each slot, so a call firing right at/after the slot
+ *      cannot beat the primer to anchor the fresh window.
+ *
+ * This is intentionally time-based (not usage-% based): the Codex usage/reset
+ * figures are exactly the data that has proven unreliable here, so a blunt clock
+ * rule is predictable and testable. This is a leaf module (no heavy imports) so
+ * every Codex path — gating, queue, warm-up, primer — can share it without
+ * import cycles.
+ *
+ * Honest limitation: making the primer the first request is necessary but not
+ * sufficient to pin the reset. If the provider window is a *trailing* one (reset
+ * slides forward with continued usage), post-slot usage can still move the reset
+ * even with a clean anchor. This holds the line as hard as a client can.
+ */
+
+export const PRIMER_HOURS_KST = [8, 13, 18, 23];
+export const KST_OFFSET_MS = 9 * 60 * 60 * 1000;
+
+const DAWN_GAP_START_HOUR_KST = 4;
+const DAWN_GAP_END_HOUR_KST = 8;
+const PRE_SLOT_HOLD_MS = 2 * 60 * 1000;
+const POST_SLOT_HOLD_MS = 5 * 60 * 1000;
+
+/** ms until the next fixed primer slot (handles the day wrap). */
+export function msUntilNextPrimerSlotKST(nowMs: number = Date.now()): number {
+  const kstNowShifted = nowMs + KST_OFFSET_MS;
+  const kstHour = new Date(kstNowShifted).getUTCHours();
+
+  let nextHour = PRIMER_HOURS_KST.find((h) => h > kstHour);
+  let dayOffset = 0;
+  if (nextHour === undefined) {
+    nextHour = PRIMER_HOURS_KST[0];
+    dayOffset = 1;
+  }
+
+  const target = new Date(kstNowShifted);
+  target.setUTCHours(nextHour, 0, 0, 0);
+  if (dayOffset === 1) target.setUTCDate(target.getUTCDate() + 1);
+  return target.getTime() - kstNowShifted;
+}
+
+/** ms elapsed since the most recent fixed primer slot (handles the day wrap). */
+export function msSincePreviousPrimerSlotKST(
+  nowMs: number = Date.now(),
+): number {
+  const kstNowShifted = nowMs + KST_OFFSET_MS;
+  const kstHour = new Date(kstNowShifted).getUTCHours();
+
+  let prevHour: number | undefined;
+  for (const h of PRIMER_HOURS_KST) {
+    if (h <= kstHour) prevHour = h;
+  }
+  let dayOffset = 0;
+  if (prevHour === undefined) {
+    // Before the day's first slot — previous slot was yesterday's last one.
+    prevHour = PRIMER_HOURS_KST[PRIMER_HOURS_KST.length - 1];
+    dayOffset = -1;
+  }
+
+  const slot = new Date(kstNowShifted);
+  slot.setUTCHours(prevHour, 0, 0, 0);
+  if (dayOffset === -1) slot.setUTCDate(slot.getUTCDate() - 1);
+  return kstNowShifted - slot.getTime();
+}
+
+/**
+ * Whether non-primer Codex execution should be held right now so the fixed-slot
+ * primer can be the window-anchoring first request. Time-based; no I/O.
+ */
+export function shouldHoldCodexForPrimerAlignment(
+  nowMs: number = Date.now(),
+): boolean {
+  const kstHour = new Date(nowMs + KST_OFFSET_MS).getUTCHours();
+  if (kstHour >= DAWN_GAP_START_HOUR_KST && kstHour < DAWN_GAP_END_HOUR_KST) {
+    return true;
+  }
+  if (msUntilNextPrimerSlotKST(nowMs) < PRE_SLOT_HOLD_MS) {
+    return true;
+  }
+  return msSincePreviousPrimerSlotKST(nowMs) < POST_SLOT_HOLD_MS;
+}

src/codex-warmup.test.ts

@@ -137,7 +137,7 @@ describe('Codex warm-up scheduler', () => {
         failureCooldownMs: 21_600_000,
         maxConsecutiveFailures: 2,
       },
-      { nowMs: now, statePath },
+      { nowMs: now, statePath, isPrimer: true },
     );
 
     expect(result).toEqual({ status: 'warmed', accountIndex: 2 });
@@ -215,7 +215,7 @@ describe('Codex warm-up scheduler', () => {
         failureCooldownMs: 21_600_000,
         maxConsecutiveFailures: 2,
       },
-      { nowMs: now, statePath },
+      { nowMs: now, statePath, isPrimer: true },
     );
 
     expect(childProcess.spawn).toHaveBeenCalledTimes(1);
@@ -275,7 +275,7 @@ describe('Codex warm-up scheduler', () => {
         failureCooldownMs: 21_600_000,
         maxConsecutiveFailures: 2,
       },
-      { nowMs: now, statePath },
+      { nowMs: now, statePath, isPrimer: true },
     );
 
     expect(result).toEqual({
@@ -338,7 +338,7 @@ describe('Codex warm-up scheduler', () => {
         failureCooldownMs: 21_600_000,
         maxConsecutiveFailures: 2,
       },
-      { nowMs: now, statePath, ignoreZeroUsageWindow: true },
+      { nowMs: now, statePath, ignoreZeroUsageWindow: true, isPrimer: true },
     );
 
     expect(result).toEqual({ status: 'warmed', accountIndex: 0 });
@@ -388,12 +388,13 @@ describe('Codex warm-up scheduler', () => {
       maxConsecutiveFailures: 1,
     };
 
-    const failed = await runCodexWarmupCycle(config, { nowMs: now, statePath });
+    const failed = await runCodexWarmupCycle(config, { nowMs: now, statePath, isPrimer: true });
     expect(failed.status).toBe('failed');
 
     const backedOff = await runCodexWarmupCycle(config, {
       nowMs: now + 60_000,
       statePath,
+      isPrimer: true,
     });
 
     expect(backedOff).toEqual({
@@ -446,10 +447,63 @@ describe('Codex warm-up scheduler', () => {
         failureCooldownMs: 21_600_000,
         maxConsecutiveFailures: 2,
       },
-      { nowMs: now, statePath },
+      { nowMs: now, statePath, isPrimer: true },
     );
 
     expect(result).toEqual({ status: 'skipped', reason: 'stagger_wait' });
     expect(childProcess.spawn).not.toHaveBeenCalled();
   });
 });
+
+describe('Codex warm-up primer-alignment hold', () => {
+  // KST 05:00 (dawn gap) — utcHour 20 → (20+9)%24 = 5.
+  const dawnNow = Date.UTC(2026, 3, 24, 20, 0, 0);
+  const baseConfig = {
+    enabled: true as const,
+    prompt: '.',
+    model: 'gpt-5.5',
+    intervalMs: 300_000,
+    minIntervalMs: 18_300_000,
+    staggerMs: 1_800_000,
+    maxUsagePct: 0,
+    maxD7UsagePct: 0,
+    commandTimeoutMs: 120_000,
+    failureCooldownMs: 21_600_000,
+    maxConsecutiveFailures: 2,
+  };
+
+  beforeEach(() => {
+    vi.resetModules();
+    vi.clearAllMocks();
+  });
+
+  it('holds a non-primer warm-up during a slot window', async () => {
+    const childProcess = await import('child_process');
+    const { runCodexWarmupCycle } = await import('./codex-warmup.js');
+
+    const result = await runCodexWarmupCycle(baseConfig, { nowMs: dawnNow });
+
+    expect(result).toEqual({
+      status: 'skipped',
+      reason: 'primer_alignment_hold',
+    });
+    expect(childProcess.spawn).not.toHaveBeenCalled();
+  });
+
+  it('exempts the primer call (isPrimer) from the alignment hold', async () => {
+    const rotation = await import('./codex-token-rotation.js');
+    const { runCodexWarmupCycle } = await import('./codex-warmup.js');
+    vi.mocked(rotation.getAllCodexAccounts).mockReturnValue([]);
+
+    const result = await runCodexWarmupCycle(baseConfig, {
+      nowMs: dawnNow,
+      isPrimer: true,
+    });
+
+    // Proceeds past the hold; with no accounts it skips for a different reason.
+    expect(result.status).toBe('skipped');
+    if (result.status === 'skipped') {
+      expect(result.reason).not.toBe('primer_alignment_hold');
+    }
+  });
+});

src/codex-warmup.ts

@@ -5,6 +5,7 @@ import os from 'os';
 import path from 'path';
 import { fileURLToPath } from 'url';
 
+import { shouldHoldCodexForPrimerAlignment } from './codex-primer-alignment.js';
 import { DATA_DIR } from './config.js';
 import type { AppConfig } from './config/schema.js';
 import {
@@ -36,6 +37,13 @@ interface CodexWarmupRuntimeOptions {
   statePath?: string;
   shouldSkip?: () => boolean;
   ignoreZeroUsageWindow?: boolean;
+  /**
+   * Set by the scheduled usage primer so its call is exempt from the
+   * primer-alignment hold. Any other warm-up caller (e.g. the dashboard's
+   * periodic warm-up) is held during the slot windows so it can't anchor the
+   * shared Codex window ahead of the primer.
+   */
+  isPrimer?: boolean;
 }
 
 export type CodexWarmupCycleResult =
@@ -317,6 +325,12 @@ export async function runCodexWarmupCycle(
     return { status: 'skipped', reason: 'runtime_busy' };
 
   const nowMs = runtime.nowMs ?? Date.now();
+  // Hold every non-primer warm-up during the slot windows so it can't anchor
+  // the shared Codex 5h window ahead of the scheduled primer (which passes
+  // isPrimer). Skipping is safe — a warm-up is best-effort.
+  if (!runtime.isPrimer && shouldHoldCodexForPrimerAlignment(nowMs)) {
+    return { status: 'skipped', reason: 'primer_alignment_hold' };
+  }
   const nowIso = new Date(nowMs).toISOString();
   const statePath = runtime.statePath ?? DEFAULT_STATE_FILE;
   const state = readWarmupState(statePath);

src/message-runtime-gating.test.ts

@@ -9,45 +9,7 @@ vi.mock('./session-commands.js', () => ({
   handleSessionCommand: handleSessionCommandMock,
 }));
 
-import {
-  handleQueuedRunGates,
-  msSincePreviousPrimerSlotKST,
-  shouldHoldCodexForPrimerAlignment,
-} from './message-runtime-gating.js';
-
-// nowMs such that the shifted KST clock reads the given hour/minute on a day.
-const KST_OFFSET = 9 * 60 * 60 * 1000;
-const atKst = (hour: number, minute = 0): number =>
-  Date.UTC(2026, 5, 9, hour, minute) - KST_OFFSET;
-
-describe('primer-alignment hold timing', () => {
-  it('measures ms since the most recent fixed slot', () => {
-    expect(msSincePreviousPrimerSlotKST(atKst(8, 0))).toBe(0);
-    expect(msSincePreviousPrimerSlotKST(atKst(13, 30))).toBe(30 * 60 * 1000);
-    // Before the day's first slot → previous slot was yesterday's 23:00.
-    expect(msSincePreviousPrimerSlotKST(atKst(2, 0))).toBe(3 * 60 * 60 * 1000);
-  });
-
-  it('holds during the 04–08 KST dawn gap', () => {
-    expect(shouldHoldCodexForPrimerAlignment(atKst(4, 0))).toBe(true);
-    expect(shouldHoldCodexForPrimerAlignment(atKst(5, 0))).toBe(true);
-    expect(shouldHoldCodexForPrimerAlignment(atKst(7, 59))).toBe(true);
-    expect(shouldHoldCodexForPrimerAlignment(atKst(3, 59))).toBe(false);
-  });
-
-  it('holds briefly right after each fixed slot, then releases', () => {
-    expect(shouldHoldCodexForPrimerAlignment(atKst(8, 0))).toBe(true);
-    expect(shouldHoldCodexForPrimerAlignment(atKst(13, 2))).toBe(true);
-    expect(shouldHoldCodexForPrimerAlignment(atKst(13, 6))).toBe(false);
-    expect(shouldHoldCodexForPrimerAlignment(atKst(18, 4))).toBe(true);
-    expect(shouldHoldCodexForPrimerAlignment(atKst(23, 30))).toBe(false);
-  });
-
-  it('does not hold mid-window away from slots and the dawn gap', () => {
-    expect(shouldHoldCodexForPrimerAlignment(atKst(15, 0))).toBe(false);
-    expect(shouldHoldCodexForPrimerAlignment(atKst(2, 0))).toBe(false);
-  });
-});
+import { handleQueuedRunGates } from './message-runtime-gating.js';
 
 describe('message-runtime-gating', () => {
   const baseArgs = {

src/message-runtime-gating.ts

@@ -1,73 +1,13 @@
+import { shouldHoldCodexForPrimerAlignment } from './codex-primer-alignment.js';
 import { logger } from './logger.js';
 import {
   handleSessionCommand,
   type SessionCommandDeps,
 } from './session-commands.js';
-import { KST_OFFSET_MS, PRIMER_HOURS_KST } from './usage-primer.js';
 import type { AgentType, NewMessage, RegisteredGroup } from './types.js';
 
-// ── Codex primer-alignment hold ──
-// The usage primer fires at fixed KST slots (08/13/18/23) to anchor the shared
-// Codex 5h usage window. For that primer to actually pin the reset to the slot,
-// it must be the *first* Codex request after the previous window expires —
-// otherwise an off-slot reviewer/arbiter/owner Codex turn anchors the window
-// early and the reset drifts. So we hold non-primer Codex turns during two
-// time-based windows, letting the scheduled primer win the first-request race:
-//
-//  1. Dawn gap 04:00–08:00 KST. The 23:00 window resets ~04:00, leaving a 4h
-//     hole before the 08:00 slot (the 23→08 span is 9h, longer than one 5h
-//     window). Any Codex call in this hole anchors a stray window, so we keep
-//     the account quiet until the 08:00 primer.
-//  2. A few minutes right after each slot, so a reviewer turn firing a beat
-//     after the slot cannot beat the primer to anchor the fresh window.
-//
-// This is intentionally time-based (not usage-% based): the Codex usage/reset
-// figures are exactly the data that has proven unreliable here, and a blunt
-// clock rule is predictable and testable. Urgent @-mention turns bypass it.
-const DAWN_GAP_START_HOUR_KST = 4;
-const DAWN_GAP_END_HOUR_KST = 8;
-const POST_SLOT_HOLD_MS = 5 * 60 * 1000;
-
-/** ms elapsed since the most recent fixed primer slot (handles the day wrap). */
-export function msSincePreviousPrimerSlotKST(
-  nowMs: number = Date.now(),
-): number {
-  const kstNowShifted = nowMs + KST_OFFSET_MS;
-  const kstHour = new Date(kstNowShifted).getUTCHours();
-
-  let prevHour: number | undefined;
-  for (const h of PRIMER_HOURS_KST) {
-    if (h <= kstHour) prevHour = h;
-  }
-  let dayOffset = 0;
-  if (prevHour === undefined) {
-    // Before the day's first slot — previous slot was yesterday's last one.
-    prevHour = PRIMER_HOURS_KST[PRIMER_HOURS_KST.length - 1];
-    dayOffset = -1;
-  }
-
-  const slot = new Date(kstNowShifted);
-  slot.setUTCHours(prevHour, 0, 0, 0);
-  if (dayOffset === -1) slot.setUTCDate(slot.getUTCDate() - 1);
-  return kstNowShifted - slot.getTime();
-}
-
-/**
- * Whether non-primer Codex turns should be held right now so the fixed-slot
- * primer can be the window-anchoring first request. Time-based; no I/O.
- */
-export function shouldHoldCodexForPrimerAlignment(
-  nowMs: number = Date.now(),
-): boolean {
-  const kstHour = new Date(nowMs + KST_OFFSET_MS).getUTCHours();
-  if (kstHour >= DAWN_GAP_START_HOUR_KST && kstHour < DAWN_GAP_END_HOUR_KST) {
-    return true;
-  }
-  return msSincePreviousPrimerSlotKST(nowMs) < POST_SLOT_HOLD_MS;
-}
-
 const CODEX_ALIGNMENT_AUTO_REPLY =
-  '코덱스 사용량 정렬 시간입니다. 고정 슬롯(08/13/18/23 KST) 직후 잠시, 그리고 04~08시 구간엔 정렬을 위해 대기합니다. 잠시 후 다시 보내주시거나 긴급하면 @태그해 주세요.';
+  '코덱스 사용량 정렬 시간입니다. 고정 슬롯(08/13/18/23 KST) 직후·직전 잠시, 그리고 04~08시 구간엔 정렬을 위해 대기합니다. 잠시 후 다시 보내주세요.';
 
 export async function handleQueuedRunGates(args: {
   chatJid: string;
@@ -98,13 +38,13 @@ export async function handleQueuedRunGates(args: {
   // ── Codex primer-alignment hold (codex-owner rooms) ──
   // Reviewer/arbiter Codex turns are held at their own dispatch site; here we
   // cover rooms whose *owner* runs on Codex, so a fresh human turn doesn't
-  // anchor the shared window before the fixed-slot primer.
-  const agentType: AgentType = args.group.agentType ?? 'claude-code';
-  if (agentType === 'codex' && shouldHoldCodexForPrimerAlignment()) {
-    const hasUrgentMention = args.missedMessages.some((m) =>
-      args.triggerPattern.test(m.content),
-    );
-    if (!hasUrgentMention) {
+  // anchor the shared window before the fixed-slot primer. Keyed on the room's
+  // configured owner agent type (a failover-only override to Codex is a rare
+  // edge we accept rather than do a DB read on every gate). No urgent bypass:
+  // the user asked to anchor the reset unconditionally, so the held turn waits
+  // for the slot like any other.
+  const ownerAgentType: AgentType = args.group.agentType ?? 'claude-code';
+  if (ownerAgentType === 'codex' && shouldHoldCodexForPrimerAlignment()) {
     logger.info(
       {
         chatJid: args.chatJid,
@@ -120,7 +60,6 @@ export async function handleQueuedRunGates(args: {
     }
     return { handled: true, success: true };
   }
-  }
 
   return { handled: false };
 }

src/message-runtime-group-processing.ts

@@ -352,7 +352,6 @@ async function handleNoMissedMessages(
     roleToChannel: runtime.roleToChannel,
     labelPairedSenders: args.labelPairedSenders,
     mode: 'idle',
-    triggerPattern: args.triggerPattern,
   });
   if (pendingTurnOutcome !== null) {
     return pendingTurnOutcome;
@@ -394,7 +393,6 @@ function runBotOnlyPendingTurn(
     labelPairedSenders: args.labelPairedSenders,
     mode: 'bot-only',
     missedMessages,
-    triggerPattern: args.triggerPattern,
   });
 }
 

src/message-runtime-queue.ts

@@ -22,7 +22,7 @@ import {
   resolveQueuedTurnRole,
 } from './message-runtime-rules.js';
 import { getTaskContextMessages } from './message-runtime-task-context.js';
-import { shouldHoldCodexForPrimerAlignment } from './message-runtime-gating.js';
+import { shouldHoldCodexForPrimerAlignment } from './codex-primer-alignment.js';
 import { getEffectiveChannelLease } from './service-routing.js';
 import { claimPairedTurnExecution } from './paired-follow-up-scheduler.js';
 import type {
@@ -184,7 +184,6 @@ export async function runPendingPairedTurnIfNeeded(args: {
   labelPairedSenders: (chatJid: string, messages: NewMessage[]) => NewMessage[];
   mode: 'idle' | 'bot-only';
   missedMessages?: NewMessage[];
-  triggerPattern?: RegExp;
 }): Promise<boolean | null> {
   const { chatJid, task, roleToChannel } = args;
   if (!task) {
@@ -227,8 +226,9 @@ export async function runPendingPairedTurnIfNeeded(args: {
   // shared 5h window early and drifts the reset. When the active role runs on
   // Codex and we're inside a primer-alignment hold window, defer the turn so
   // the fixed-slot primer stays the first request. The open task is re-detected
-  // on the next poll, so this just postpones (no work is lost). An urgent
-  // @-mention in the recent human messages bypasses the hold.
+  // on the next poll, and the per-revision claim guarantees it resumes exactly
+  // once after the window clears (no work lost, no double run). No urgent
+  // bypass: the reset is anchored unconditionally.
   const pendingRole = resolveActiveRole(task.status);
   if (
     (pendingRole === 'reviewer' || pendingRole === 'arbiter') &&
@@ -239,10 +239,7 @@ export async function runPendingPairedTurnIfNeeded(args: {
       pendingRole === 'reviewer'
         ? lease.reviewer_agent_type
         : lease.arbiter_agent_type;
-    const hasUrgentMention = args.triggerPattern
-      ? recentHumanMessages.some((m) => args.triggerPattern!.test(m.content))
-      : false;
-    if (roleAgentType === 'codex' && !hasUrgentMention) {
+    if (roleAgentType === 'codex') {
       args.log.info(
         {
           chatJid,

src/usage-primer.test.ts

@@ -71,7 +71,7 @@ describe('usage-primer', () => {
         maxUsagePct: 100,
         maxD7UsagePct: 100,
       }),
-      { ignoreZeroUsageWindow: true },
+      { ignoreZeroUsageWindow: true, isPrimer: true },
     );
   });
 });

src/usage-primer.ts

@@ -2,6 +2,7 @@ import { spawn } from 'child_process';
 import fs from 'fs';
 import path from 'path';
 
+import { msUntilNextPrimerSlotKST } from './codex-primer-alignment.js';
 import { CODEX_WARMUP_CONFIG } from './config.js';
 import {
   refreshActiveCodexUsage,
@@ -23,14 +24,13 @@ import { getAllTokens } from './token-rotation.js';
  * 18:00 → 18:33 over ~33 min of activity), so any off-slot Codex call by a
  * paired-room reviewer/arbiter on the same account would anchor the window
  * early. To make the slot the *anchor*, the primer is paired with a hold gate
- * (`shouldHoldCodexForPrimerAlignment` in message-runtime-gating.ts) that
- * keeps non-primer Codex turns quiet during the dawn gap (04–08 KST) and for a
- * few minutes after each slot, so the primer wins the first-request race. The
- * primer is also a best-effort warm-up + success/failure record.
+ * (`shouldHoldCodexForPrimerAlignment` in codex-primer-alignment.ts) that keeps
+ * non-primer Codex turns/warm-ups quiet during the dawn gap (04–08 KST) and the
+ * minutes around each slot, so the primer wins the first-request race. The
+ * primer itself passes `isPrimer` so it is never held. The primer is also a
+ * best-effort warm-up + success/failure record.
  */
 
-export const PRIMER_HOURS_KST = [8, 13, 18, 23];
-export const KST_OFFSET_MS = 9 * 60 * 60 * 1000;
 const CLAUDE_PRIMER_TIMEOUT_MS = 60_000;
 const CODEX_PRIMER_MIN_INTERVAL_MS = 5 * 60 * 60 * 1000;
 // Fire the Codex primer unconditionally at every slot, mirroring the Claude
@@ -165,13 +165,14 @@ export async function runCodexPrimerCycle(): Promise<void> {
         maxUsagePct: CODEX_PRIMER_MAX_USAGE_PCT,
         maxD7UsagePct: CODEX_PRIMER_MAX_D7_USAGE_PCT,
       },
-      { ignoreZeroUsageWindow: true },
+      { ignoreZeroUsageWindow: true, isPrimer: true },
     );
-    // Best-effort: a slot may land while the trailing 5h window is exhausted,
-    // in which case this records `failed`. We deliberately do NOT try to
-    // re-anchor to the reported reset time: the 5h limit is a trailing rolling
-    // window whose reset slides forward with continued Codex usage, so no
-    // single timed call can pin the reset to a fixed clock time.
+    // `isPrimer` exempts this call from the alignment hold (the hold blocks
+    // every *other* Codex path during the slot windows) so the primer is the
+    // first Codex request and anchors the window at the slot. A slot may still
+    // land while the trailing 5h window is exhausted, in which case this records
+    // `failed`; we do not chase the reported reset time, since a trailing window
+    // can keep sliding with later usage.
     logger.info({ result }, 'Codex primer cycle finished');
   } catch (err) {
     logger.warn({ err }, 'Codex primer cycle threw');
@@ -183,26 +184,6 @@ async function runPrimerCycle(): Promise<void> {
   await Promise.allSettled([runClaudePrimerCycle(), runCodexPrimerCycle()]);
 }
 
-export function msUntilNextPrimerSlotKST(nowMs: number = Date.now()): number {
-  // KST = UTC+9 (no DST). Shift so KST clock can be read via getUTC*.
-  const kstNowShifted = nowMs + KST_OFFSET_MS;
-  const kstDate = new Date(kstNowShifted);
-  const kstH = kstDate.getUTCHours();
-
-  let nextH = PRIMER_HOURS_KST.find((h) => h > kstH);
-  let dayOffset = 0;
-  if (nextH === undefined) {
-    nextH = PRIMER_HOURS_KST[0];
-    dayOffset = 1;
-  }
-
-  const target = new Date(kstNowShifted);
-  target.setUTCHours(nextH, 0, 0, 0);
-  if (dayOffset === 1) target.setUTCDate(target.getUTCDate() + 1);
-
-  return target.getTime() - kstNowShifted;
-}
-
 let primerTimer: ReturnType<typeof setTimeout> | null = null;
 
 export function startUsagePrimer(): void {