feat(notifications): add Grok Code Fast 1 Optimized discontinued notification

[kilo-code-bot]

Summary

• Adds a new conditional notification that informs former Grok Code Fast 1 Optimized users that the model has been discontinued, suggesting Auto Free as the replacement.
• Audience is sourced from the PostHog view notification_grok_code_may_15, following the same pattern previously used for the MiMo and Trinity Large Thinking discontinuation notifications.

Verification

Read apps/web/src/lib/notifications.ts to confirm the new generator is wired into conditionalNotifications and follows the established PostHog-cached lookup pattern. Full pnpm typecheck was skipped per repo guidance to avoid long-running checks during agent execution.

Visual Changes

N/A — backend notification only; renders through existing notification UI.

Reviewer Notes

The PostHog view notification_grok_code_may_15 must exist and expose a kilo_user_id column for this to surface notifications in production. The notification has no expiresAt; remove the generator (mirroring PR #2902) when the audience has been informed.

[kilo-code-bot]

WARNING: In-memory cache is bypassed — new Map created on every call

Calling cachedPosthogQuery(schema) inline inside the function body creates a new memoryCache = new Map() closure on every invocation. This means the 1-hour in-memory L1 cache layer is never populated or reused; every request falls through to Redis (or PostHog if Redis is cold).

The existing pattern in generateByokProvidersNotification (line 239) correctly stores the curried function at module scope so the in-memory cache persists across calls:

// Module scope — correct pattern (mirrors generateByokProvidersNotification)
const getGrokCodeFast1OptimizedDiscontinuedUsers = cachedPosthogQuery(
  z.array(z.tuple([z.string()]).transform(([userId]) => userId))
);

async function generateGrokCodeFast1OptimizedDiscontinuedNotification(...) {
  const users = await getGrokCodeFast1OptimizedDiscontinuedUsers(
    'grok-code-fast-1-optimized-discontinued-users',
    'select kilo_user_id from notification_grok_code_may_15 limit 5e5'
  );
  // ...
}

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

The previous WARNING is resolved: cachedPosthogQuery is now correctly hoisted to module scope (getGrokCodeFast1OptimizedDiscontinuedUsers), ensuring the in-memory L1 cache works as intended. The notification message and suggestModelId update are straightforward.

Files Reviewed (1 file)

• apps/web/src/lib/notifications.ts — 0 issues (previous WARNING fixed)

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_{Reviewed by claude-4.6-sonnet-20260217 · 133,123 tokens}

_{Review guidance: REVIEW.md from base branch main}