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 skills/g1joshi/agent-skills/echonpx skills add G1Joshi/Agent-Skills --skill echogit clone --depth 1 https://github.com/G1Joshi/Agent-SkillsWrote 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/g1joshi/agent-skills/echo)<a href="https://agentmods.dev/skills/g1joshi/agent-skills/echo"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/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 | $0.00014 | $0.00235 |
| Opus 5 | $0.00007 | $0.00118 |
| Sonnet 5 | $0.00003 | $0.00047 |
| Haiku 4.5 | $0.00001 | $0.00023 |
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 yesterday.
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
Echo
Echo is a minimalist Go framework known for performance. v4 is stable and widely used for microservices.
When to Use
- Microservices: Lightweight REST APIs.
- Performance: Low memory footprint.
- Simplicity: No magic, just handlers and middleware.
Core Concepts
Context
c.Param(), c.JSON(). The context object wraps request/response.
Middleware
Centralized logic. e.Use(middleware.Logger()).
Binding
c.Bind(u) binds JSON/Form data to structs.
Best Practices (2025)
Do:
- Use
Validator: Integratego-playground/validatorfor struct validation. - Use
Graceful Shutdown: Support safe deployment restarts. - Group Routes:
v1 := e.Group("/v1").
Don't:
- Don't ignore errors: Go requires explicit error handling.
References
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.
- yesterday First seen · 45 lines · 14 tokens per session scan A 3617037cb778
echo is a skill published in the GitHub repository G1Joshi/Agent-Skills (12 stars, last pushed 6mo ago), licensed MIT. It adds 14 tokens to every session and 235 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 2026-09-03.
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