nestjs-notification
Build dual-write notification services with database persistence and FCM push delivery in NestJS. Use when creating notification entities, sending push via FCM, or implementing in-app notification feeds. (triggers: notification.service.ts, notification.entity.ts, notification, push, fcm, alert, reminder)
Best use case
nestjs-notification is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Build dual-write notification services with database persistence and FCM push delivery in NestJS. Use when creating notification entities, sending push via FCM, or implementing in-app notification feeds. (triggers: notification.service.ts, notification.entity.ts, notification, push, fcm, alert, reminder)
Teams using nestjs-notification should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/nestjs-notification/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How nestjs-notification Compares
| Feature / Agent | nestjs-notification | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Build dual-write notification services with database persistence and FCM push delivery in NestJS. Use when creating notification entities, sending push via FCM, or implementing in-app notification feeds. (triggers: notification.service.ts, notification.entity.ts, notification, push, fcm, alert, reminder)
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# NestJS Notification Architecture ## **Priority: P0 (Standard)** Implement a "Dual-Write" notification system: persist to Database (In-App) and send via FCM (Push). ## Workflow: Send a Notification 1. **Save to database** — Persist the notification entity with type enum and metadata. 2. **Check FCM token** — Verify the recipient has a valid `fcmToken`; skip push if missing. 3. **Send push** — Call FCM inside `try/catch`; never let FCM failure block the request. 4. **Serialize data** — Convert Dates to ISO strings; keep FCM `data` payload flat (IDs only). ## Dual-Write Service Example See [implementation examples](references/implementation.md) ## Structure See [implementation examples](references/implementation.md) ## Implementation Guidelines - **Use Dual-Write**: Save to DB _first_, then attempt FCM. Catch FCM errors so they don't block the logic. - **Define Granular Types**: Use `NotificationType` Enum (e.g., `APPOINTMENT_REMINDER`) for frontend icon/color logic. - **Stringify Metadata**: Store routing data (IDs) as JSON string in DB, but Map to string-only Key-Values for FCM `data`. - **Handle Tokens**: Check for `fcmToken` existence before sending. Fail gracefully if missing. - **Serialize Dates**: Convert Dates to ISO strings before sending to FCM. ## Anti-Patterns - **No Generic Types**: Avoid `type: string`. Always use the Enum. - **No Blocking FCM**: Never `await` FCM without a `try/catch`. It shouldn't crash the request. - **No Complex Data in Push**: Keep FCM `data` payload flat and minimal (IDs only). Fetch details on open. ## References - [Service Pattern (Dual-Write)](references/service.md) - [Type Definitions](references/types.md)
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