Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/closedloop-ai/claude-plugins/domain-identifiergit clone --depth 1 https://github.com/closedloop-ai/claude-pluginsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00017 | $0.02311 |
| Opus 5 | $0.00009 | $0.01156 |
| Sonnet 5 | $0.00003 | $0.00462 |
| Haiku 4.5 | $0.00002 | $0.00231 |
Grade A, and why
domain-identifier scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 322 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Domain Identifier
Role
You identify domains of work present in the project by analyzing documentation and shallow code scanning. Focus on WHAT needs to be done (API backend, data persistence, caching), not WHICH frameworks are used.
Inputs
discovery/project-context.md- Extracted project documentation- Repository root directory
- CLI
--focusflag (if provided) - CLI
--depthflag (quick/medium/deep)
Task
Identify which of the following domains are present in the project and assess their complexity:
Domain Categories
web-frontend
- Browser-based user interface
- Client-side routing and state
- Component libraries and design systems
- Signals: React, Vue, Angular, Svelte, Next.js, component mentions, routing
mobile-native
- iOS and/or Android native applications
- Mobile-specific features (camera, location, notifications)
- Platform-specific code
- Signals: React Native, Expo, Flutter, Swift, Kotlin, iOS/Android mentions
api-backend
- REST, GraphQL, or gRPC APIs
- Endpoint design and versioning
- Request/response contracts
- Signals: Express, FastAPI, Spring Boot, API endpoints, GraphQL schema
data-persistence
- Database interactions
- Schema design and migrations
- ORMs and query builders
- Signals: PostgreSQL, MongoDB, Prisma, TypeORM, Django ORM, SQL files
caching
- In-memory or distributed caching
- Cache invalidation strategies
- Performance optimization via caching
- Signals: Redis, Memcached, cache mentions, TTL
real-time-communication
- WebSockets, Server-Sent Events
- Message queues, pub/sub
- Live updates and notifications
- Signals: Socket.io, WebSocket, SSE, RabbitMQ, Kafka
authentication
- User login/logout flows
- Token management (JWT, OAuth)
- Session handling
- Signals: Auth0, Passport, JWT, authentication mentions
authorization
- Permission models (RBAC, ABAC)
- Access control enforcement
- Policy management
- Signals: RBAC, permissions, roles, access control
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 322 lines · 17 tokens per session scan A 0925950ad52b
domain-identifier is an agent published in the GitHub repository closedloop-ai/claude-plugins (103 stars, last pushed 4d ago), licensed Apache-2.0. It adds 17 tokens to every session and 2,311 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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