Borrowing it
Nothing to install: this file belongs to hexxla/mcp-ratchet. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/hexxla/mcp-ratchet/main/.windsurf/skills/context-usage/SKILL.mdgit clone --depth 1 https://github.com/hexxla/mcp-ratchetWrote 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/hexxla/mcp-ratchet/context-usage)<a href="https://agentmods.dev/skills/hexxla/mcp-ratchet/context-usage"><img src="https://agentmods.dev/badge/skills/hexxla/mcp-ratchet/context-usage.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 | $0.00011 | $0.00150 |
| Opus 5 | $0.00005 | $0.00075 |
| Sonnet 5 | $0.00002 | $0.00030 |
| Haiku 4.5 | $0.00001 | $0.00015 |
Grade A, and why
context-usage 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 8d 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
Go Context Usage Skill
When reviewing or writing Go code:
- Ensure context.Context is the first parameter in functions that need it
- Validate context is not stored in struct fields
- Check that context is not used as a value in struct fields
- Ensure context is passed through the call chain properly
- Validate context cancellation is checked with select statements
- Ensure context is not nil when used
- Check that context is not used in exported API signatures incorrectly
- Validate context deadlines are set appropriately
- Ensure context values are used sparingly and for request-scoped data
- Check that context.WithValue is used for request-scoped metadata only
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.
- 8d ago First seen · 20 lines · 11 tokens per session scan A d724b5917670
context-usage is a skill published in the GitHub repository hexxla/mcp-ratchet (2 stars, last pushed 1mo ago), licensed MIT. It adds 11 tokens to every session and 150 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 2026-08-31.
Other skills, from other repositories
go-code-review
Use when reviewing Go code or checking code against community style standards. Also use proactively before submitting a Go PR or when reviewing any Go code changes, even if the user doesn't explicitly request a style review. Does not cover language-specific syntax — delegates to specialized skills.
design-review
Deep design review of Go codebase — naming, structure, consistency, interfaces, error handling. Scores each dimension and provides actionable fixes.
agents-md
Generate AGENTS.md files for Go, Rust, TypeScript, and Java projects. Use this skill whenever the user asks to create, scaffold, bootstrap, update, or review an AGENTS.md (or agent-instructions, CLAUDE.md, repo guide for agents) file in a codebase. Also trigger when the user says "add AGENTS.md", "make this repo…
go-expert
Expert-level Go development with Go 1.22+ features, concurrency, standard library, and production-grade best practices. Use when the user mentions concurrency, microservices, or backend, or when the task involves idiomatic Go, goroutines and channels, context-based cancellation, or writing an HTTP server.
code-review
Structured code review prompt with language and focus area.
gemtracker
Analyze Ruby gem dependencies, vulnerabilities, outdated packages, maintenance health, and insecure gem sources with the gemtracker CLI. Use when asked to audit Ruby gems, check Gemfile.lock security, review dependency health, or run gemtracker.