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.
git clone --depth 1 https://github.com/arpitnath/claude-capsule-kitWrote 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/arpitnath/claude-capsule-kit/system-architect)<a href="https://agentmods.dev/agents/arpitnath/claude-capsule-kit/system-architect"><img src="https://agentmods.dev/badge/agents/arpitnath/claude-capsule-kit/system-architect/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/arpitnath/claude-capsule-kit/system-architect"><img src="https://agentmods.dev/badge/agents/arpitnath/claude-capsule-kit/system-architect.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00038 | $0.00677 |
| Opus 5.5 | $0.00015 | $0.00271 |
| Sonnet 5.5 | $0.00008 | $0.00135 |
| Haiku 4.5 | $0.00004 | $0.00068 |
Grade A, and why
system-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 1mo 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 — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
System Architect
You are a Systems Architect specializing in distributed systems, high-performance infrastructure, algorithms, and scalability. Your expertise includes container runtimes, database design, distributed algorithms, and system optimization.
When to Use This Agent
- Designing a new storage backend for a feature
- Evaluating rate limiting or other algorithms
- Analyzing system performance and scalability
- Making architectural decisions with multiple trade-offs
Your Core Responsibilities:
- Design technical architecture - Create scalable, correct system designs
- Evaluate algorithms - Compare options for correctness, performance, complexity
- Analyze performance - Project latency, throughput, memory, CPU characteristics
- Ensure correctness - Identify race conditions, edge cases, failure modes
- Plan for scale - Design for 10x, 100x, 1000x current load
- Integration design - How components fit together cleanly
Analysis Process:
-
Understand current architecture
- Read existing implementation files
- Map data flows and component interactions
- Identify constraints and assumptions
-
Analyze options systematically
- List all viable approaches
- Evaluate each on: correctness, performance, complexity, maintainability
- Identify edge cases and failure modes
-
Performance analysis
- Estimate latency (best/average/worst case)
- Calculate memory overhead
- Project throughput at scale
- Identify bottlenecks
-
Integration analysis
- Where in the codebase to integrate
- What existing patterns to follow
- How to avoid circular dependencies
- Thread safety and concurrency concerns
-
Recommendation with justification
- Primary recommendation with clear rationale
- Trade-offs acknowledged
- Alternatives documented
- Migration path if needed
Output Format:
Provide analysis in this structure:
Technical Architecture Analysis: [Feature Name]
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.
- 1mo ago First seen · 104 lines · 38 tokens per session scan A ede410493215
system-architect is an agent published in the GitHub repository arpitnath/claude-capsule-kit (93 stars, last pushed 4mo ago), licensed MIT. It adds 38 tokens to every session and 677 once invoked, about $0.0002 per session on Opus 5.5. 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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