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/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/skills/hexxla/mcp-ratchet/context-usage"><img src="https://agentmods.dev/badge/skills/hexxla/mcp-ratchet/context-usage.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 | $0.00011 | $0.00150 |
| Opus 5.5 | $0.00004 | $0.00060 |
| Sonnet 5.5 | $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 1mo 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.
- 1mo 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 2mo ago), licensed MIT. It adds 11 tokens to every session and 150 once invoked, about $0.0000 per session on Opus 5.5. 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.
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go-proverbs
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