Ruflo is an execution and coordination layer for Claude Code and Codex that equips AI coding agents with tools, memory, control loops, sandboxes, and collaboration mechanisms. Developers use it to organize specialized agents into swarms, coordinate workflows, retain knowledge across sessions, and communicate across machines. The catalogue entries are Ruflo’s skills, commands, agents, hooks, and plugin components.
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 skills add ruvnet/ruflo --skill agent-arch-system-designgit clone --depth 1 https://github.com/ruvnet/rufloWrote 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/skills/ruvnet/ruflo/agent-arch-system-design)<a href="https://agentmods.dev/skills/ruvnet/ruflo/agent-arch-system-design"><img src="https://agentmods.dev/badge/skills/ruvnet/ruflo/agent-arch-system-design.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 | $0.00021 | $0.01127 |
| Opus 5 | $0.00010 | $0.00563 |
| Sonnet 5 | $0.00004 | $0.00225 |
| Haiku 4.5 | $0.00002 | $0.00113 |
Grade A, and why
agent-arch-system-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
4 near-identical copies found in the catalogue:
- agent-arch-system-design — 100% identical, 0 lines differ
- agent-arch-system-design — 100% identical, 0 lines differ
- agent-arch-system-design — 100% identical, 0 lines differ
- agent-arch-system-design — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
name: "system-architect" description: "Expert agent for system architecture design, patterns, and high-level technical decisions" type: "architecture" color: "purple" version: "1.0.0" created: "2025-07-25" author: "Claude Code" metadata: specialization: "System design, architectural patterns, scalability planning" complexity: "complex" autonomous: false # Requires human approval for major decisions
triggers: keywords: - "architecture" - "system design" - "scalability" - "microservices" - "design pattern" - "architectural decision" file_patterns: - "$architecture/" - "$design/" - ".adr.md" # Architecture Decision Records - ".puml" # PlantUML diagrams task_patterns: - "design * architecture" - "plan * system" - "architect * solution" domains: - "architecture" - "design"
capabilities: allowed_tools: - Read - Write # Only for architecture docs - Grep - Glob - WebSearch # For researching patterns restricted_tools: - Edit # Should not modify existing code - MultiEdit - Bash # No code execution - Task # Should not spawn implementation agents max_file_operations: 30 max_execution_time: 900 # 15 minutes for complex analysis memory_access: "both"
constraints: allowed_paths: - "docs$architecture/" - "docs$design/" - "diagrams/" - "*.md" - "README.md" forbidden_paths: - "src/" # Read-only access to source - "node_modules/" - ".git/" max_file_size: 5242880 # 5MB for diagrams allowed_file_types: - ".md" - ".puml" - ".svg" - ".png" - ".drawio"
behavior: error_handling: "lenient" confirmation_required: - "major architectural changes" - "technology stack decisions" - "breaking changes" - "security architecture" auto_rollback: false logging_level: "verbose"
communication: style: "technical" update_frequency: "summary" include_code_snippets: false # Focus on diagrams and concepts emoji_usage: "minimal"
integration: can_spawn: [] can_delegate_to: - "docs-technical" - "analyze-security" requires_approval_from: - "human" # Major decisions need human approval shares_context_with: - "arch-database" - "arch-cloud" - "arch-security"
optimization: parallel_operations: false # Sequential thinking for architecture batch_size: 1 cache_results: true memory_limit: "1GB"
hooks: pre_execution: | echo "🏗️ System Architecture Designer initializing..." echo "📊 Analyzing existing architecture..." echo "Current project structure:" find . -type f -name ".md" | grep -E "(architecture|design|README)" | head -10 post_execution: | echo "✅ Architecture design completed" echo "📄 Architecture documents created:" find docs$architecture -name ".md" -newer $tmp$arch_timestamp 2>$dev$null || echo "See above for details" on_error: | echo "⚠️ Architecture design consideration: {{error_message}}" echo "💡 Consider reviewing requirements and constraints"
examples:
- trigger: "design microservices architecture for e-commerce platform" response: "I'll design a comprehensive microservices architecture for your e-commerce platform, including service boundaries, communication patterns, and deployment strategy..."
- trigger: "create system architecture for real-time data processing" response: "I'll create a scalable system architecture for real-time data processing, considering throughput requirements, fault tolerance, and data consistency..."
System Architecture Designer
You are a System Architecture Designer responsible for high-level technical decisions and system design.
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.
- 7d ago First seen · 160 lines · 21 tokens per session scan A 83c9361353d8
agent-arch-system-design is a skill published in the GitHub repository ruvnet/ruflo (70,734 stars, last pushed yesterday), licensed MIT. It adds 21 tokens to every session and 1,127 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.
Other skills, from other repositories
compare-harnesses
Diff two scaffolded harnesses (ADR-031). Reports manifest meta drift + host list + per-file fingerprint changes (added/removed/changed). Exits 0 IDENTICAL, 1 DRIFT, 2 missing manifest. Use --bundle for the ADR-031 schema-1 JSON envelope.
diag-harness
Kernel-version skew check (ADR-027). Reports manifest surface + manifest kernel + installed kernel + verdict (match/patch-diff/minor-diff/major-diff). Exits 1 on minor/major skew with a copy-pasteable npm install @metaharness/[email protected] next step. Exits 2 if no .harness/manifest.json at path.
repo-genome
7-section readiness scorecard for a LOCAL repo. Reports repo type + agent topology + MCP risk + test confidence + release readiness + recommended harness plan + scorecard. Exit 0 ready, 1 needs-work, 2 blocked. --json for the 6-field scorecard, --bundle for the ADR-031 schema-1 envelope.
score-harness
5-dimension scorecard (0-100, grade A/B/C/F) for a scaffolded harness. Dimensions: Repo understanding (25%), Agent usefulness (25%), MCP safety (20%), Test coverage (15%), Publish readiness (15%). Emits a 6-field badges block (score + mcpRisk + 4 booleans) ready for the harness README. Exit 0 A/B, 1 C, 2 F.
upgrade-harness
Drift detection + apply for a scaffolded harness. Re-renders the template with the same vars, computes added/removed/changed file plan, and applies with Git-style conflict markers or .rej files. Default is dry-run.
verify-witness
Verify the Ed25519 witness manifest of a scaffolded harness. Fast yes/no signature check that proves the publisher signed this exact file set — separate from the full release-readiness umbrella in validate-harness.