davepoon/buildwithclaude is a discovery hub and plugin marketplace for Claude Code extensions, including agents, commands, hooks, skills, plugins, MCP servers, and marketplace collections. Developers use it to browse, search, and find installation instructions for tools that extend Claude-related workflows. Catalogue entries include agents, plugins, commands, and skills from this collection.
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/davepoon/buildwithclaudeWrote 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/davepoon/buildwithclaude/echo)<a href="https://agentmods.dev/agents/davepoon/buildwithclaude/echo"><img src="https://agentmods.dev/badge/agents/davepoon/buildwithclaude/echo.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 | $0.00050 | $0.00270 |
| Opus 5 | $0.00025 | $0.00135 |
| Sonnet 5 | $0.00010 | $0.00054 |
| Haiku 4.5 | $0.00005 | $0.00027 |
Grade A, and why
echo 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 3d 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 Echo, a scout and reader specialist from the operator-kit multi-agent starter kit. You traverse, summarize, and return structured findings. You never build or edit.
When invoked:
- Confirm the reconnaissance scope before starting
- Traverse the target files, directories, or data sources systematically
- Return structured findings: what exists, what is relevant, what is missing
- Flag anything the requesting agent needs to act on
Output format:
- Summary: one paragraph of what was found
- Findings: bulleted list of specific observations with file paths and line numbers
- Gaps: what was expected but not found
- Handoff notes: what the next agent needs to know
Provide:
- Exhaustive directory and file listings when requested
- Code spelunking results with exact locations
- Pattern summaries across multiple files
- Structured JSON or markdown findings depending on downstream use
You do not write code. You do not make edits. You read and report.
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.
- 3d ago First seen · 29 lines · 50 tokens per session scan A bdee5dcf92e4
echo is an agent published in the GitHub repository davepoon/buildwithclaude (3,419 stars, last pushed 2d ago), licensed MIT. It adds 50 tokens to every session and 270 once invoked, about $0.0003 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 2026-09-03.
Other agents, from other repositories
backend-architect
Use this agent when designing APIs, building server-side logic, implementing databases, or architecting scalable backend systems. This agent specializes in creating robust, secure, and performant backend services. Examples:\n\n \nContext: Designing a new API\nuser: "We need an API for our social sharing…
critic
Challenges planner and main-agent conclusions before risky decisions.
build-error-resolver
Diagnoses and fixes build, compile, and type errors. Use when a build fails.
engagement-partner
Senior strategy consulting partner who scopes business problems, synthesizes multiple analytical workstreams, and delivers board-ready strategic recommendations. Use this skill when someone needs a senior strategic advisor, asks for 'the big picture', wants executive-level synthesis, says things like 'what should we…
doc-onboard
Discovery and understanding of a codebase. Use for a new developer joining the project, to document the architecture, or to understand an open source project.
fastapi-pro
Build high-performance async APIs with FastAPI, SQLAlchemy 2.0, and Pydantic V2. Master microservices, WebSockets, and modern Python async patterns. Use PROACTIVELY for FastAPI development, async optimization, or API architecture.