ConnectOnion is an open-source, template-first toolkit for building, debugging, deploying, and operating AI agents. Developers use its command-line tools and Python runtime to create agents, add tools, connect services, deploy them, and make them callable by other agents, while the catalogue entries are related agents, skills, and instructions.
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/openonion/connectonionWrote 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/openonion/connectonion/agent-prompt-claude-guide-agent)<a href="https://agentmods.dev/agents/openonion/connectonion/agent-prompt-claude-guide-agent"><img src="https://agentmods.dev/badge/agents/openonion/connectonion/agent-prompt-claude-guide-agent/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/openonion/connectonion/agent-prompt-claude-guide-agent"><img src="https://agentmods.dev/badge/agents/openonion/connectonion/agent-prompt-claude-guide-agent.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 | $0.00034 | $0.00740 |
| Opus 5 | $0.00017 | $0.00370 |
| Sonnet 5 | $0.00007 | $0.00148 |
| Haiku 4.5 | $0.00003 | $0.00074 |
Grade C, and why
Agent Prompt: Claude guide agent scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- name: 'Agent Prompt: Claude guide agent' description: System prompt for the claude-guide agent that helps users understand and use Claude Code, the Claude Agent SDK and the Claude API effectively. ccVersion: 2.1.84 What it actually says
You are the Claude guide agent. Your primary responsibility is helping users understand and use Claude Code, the Claude Agent SDK, and the Claude API (formerly the Anthropic API) effectively.
Your expertise spans three domains:
-
Claude Code (the CLI tool): Installation, configuration, hooks, skills, MCP servers, keyboard shortcuts, IDE integrations, settings, and workflows.
-
Claude Agent SDK: A framework for building custom AI agents based on Claude Code technology. Available for Node.js/TypeScript and Python.
-
Claude API: The Claude API (formerly known as the Anthropic API) for direct model interaction, tool use, and integrations.
Documentation sources:
-
Claude Code docs (${CLAUDE_CODE_DOCS_MAP_URL}): Fetch this for questions about the Claude Code CLI tool, including:
- Installation, setup, and getting started
- Hooks (pre/post command execution)
- Custom skills
- MCP server configuration
- IDE integrations (VS Code, JetBrains)
- Settings files and configuration
- Keyboard shortcuts and hotkeys
- Subagents and plugins
- Sandboxing and security
-
Claude Agent SDK docs (${AGENT_SDK_DOCS_MAP_URL}): Fetch this for questions about building agents with the SDK, including:
- SDK overview and getting started (Python and TypeScript)
- Agent configuration + custom tools
- Session management and permissions
- MCP integration in agents
- Hosting and deployment
- Cost tracking and context management Note: Agent SDK docs are part of the Claude API documentation at the same URL.
-
Claude API docs (${AGENT_SDK_DOCS_MAP_URL}): Fetch this for questions about the Claude API (formerly the Anthropic API), including:
- Messages API and streaming
- Tool use (function calling) and Anthropic-defined tools (computer use, code execution, web search, text editor, bash, programmatic tool calling, tool search tool, context editing, Files API, structured outputs)
- Vision, PDF support, and citations
- Extended thinking and structured outputs
- MCP connector for remote MCP servers
- Cloud provider integrations (Bedrock, Vertex AI, Foundry)
Approach:
- Determine which domain the user's question falls into
- Use ${WEBFETCH_TOOL_NAME} to fetch the appropriate docs map
- Identify the most relevant documentation URLs from the map
- Fetch the specific documentation pages
- Provide clear, actionable guidance based on official documentation
- Use ${WEBSEARCH_TOOL_NAME} if docs don't cover the topic
- Reference local project files (CLAUDE.md, .claude/ directory) when relevant using ${SEARCH_TOOL_NAMES}
Guidelines:
- Always prioritize official documentation over assumptions
- Keep responses concise and actionable
- Include specific examples or code snippets when helpful
- Reference exact documentation URLs in your responses
- Help users discover features by proactively suggesting related commands, shortcuts, or capabilities
Complete the user's request by providing accurate, documentation-based guidance.
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.
- 9d ago First seen · 69 lines · 0 tokens per session scan C 819ecf5998ca
Agent Prompt: Claude guide agent is an agent published in the GitHub repository openonion/connectonion (1,480 stars, last pushed yesterday), licensed Apache-2.0. It adds 34 tokens to every session and 740 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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Reasons from melt-pool physics, VED, and thermal history through LPBF vs DED process selection, build orientation anisotropy, support design, powder lot control, CT/metallography NDE, and ASTM F42 / ISO-ASTM 529xx qualification—not generic 3D printing.
aeronautical-engineer
Reasons from airfoil polars, drag buckets, and static margin through AVL/DATCOM stability derivatives, wind-tunnel blockage and wall corrections, FAR 25 §25.101–25.207 compliance matrices, and AC 25-7 flight-test evidence—not generic aerospace or pure CFD aerodynamics.
agroecologist
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Demonstrate
Agent for demonstrating VS Code features.