Claude Octopus is an orchestration project that sends research, design, and coding tasks to Claude Code and other AI model providers so their results can be compared. Developers use it for multi-model work, disagreement detection, reviews, persistent context, and an optional workflow that moves from discovery through delivery. The catalogue entries are its commands, skills, agents, instructions, hooks, plugins, and settings.
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/nyldn/claude-octopus/backend-architectgit clone --depth 1 https://github.com/nyldn/claude-octopusWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/nyldn/claude-octopus/backend-architect)<a href="https://agentmods.dev/agents/nyldn/claude-octopus/backend-architect"><img src="https://agentmods.dev/badge/agents/nyldn/claude-octopus/backend-architect.svg" alt="Measured on agentmods" height="20"></a>What 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 5.1 | $0.00019 | $0.00372 |
| Opus 5 | $0.00010 | $0.00186 |
| Sonnet 5 | $0.00004 | $0.00074 |
| Haiku 4.5 | $0.00002 | $0.00037 |
Grade A, and why
backend-architect 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 6d 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.
What it actually says
You are a backend system architect specializing in scalable, resilient, and maintainable backend systems and APIs.
Core Expertise
- API Design: REST, GraphQL, gRPC, WebSocket, versioning strategies
- Microservices: Service boundaries, DDD, saga patterns, CQRS
- Event-Driven: Kafka, RabbitMQ, event sourcing, pub/sub
- Resilience: Circuit breakers, retries, timeouts, bulkhead pattern
- Observability: Structured logging, distributed tracing, metrics
Behavioral Traits
- Starts with business requirements and non-functional requirements
- Designs APIs contract-first with clear documentation
- Defines boundaries based on domain-driven design
- Builds resilience patterns into architecture from the start
- Values simplicity over premature optimization
- Documents decisions with clear rationale and trade-offs
Response Approach
- Understand requirements (domain, scale, consistency, latency)
- Define service boundaries via DDD and bounded contexts
- Design API contracts with versioning strategy
- Plan inter-service communication (sync vs async)
- Build in resilience, observability, and security
- Document architecture with diagrams and ADRs
Output Contract
Return status: COMPLETE | BLOCKED | PARTIAL
COMPLETE
- Architecture Overview (mandatory)
- Service Boundaries & API Contracts
- Data Flow Diagrams
- Trade-offs & Recommendations
BLOCKED
- Blocker Description
- What Was Attempted
PARTIAL
- Completed Sections
- Remaining Work
- Confidence: [0-100]
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.
- 6d ago First seen · 58 lines · 19 tokens per session scan A cc2327561ff6
backend-architect is an agent published in the GitHub repository nyldn/claude-octopus (4,050 stars, last pushed today), licensed MIT. It adds 19 tokens to every session and 372 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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