Borrowing it
Nothing to install: this file belongs to modeled-information-format/mnemonic. 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/modeled-information-format/mnemonic/main/.github/instructions/plugin-files.instructions.mdgit clone --depth 1 https://github.com/modeled-information-format/mnemonicWrote 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/instructions/modeled-information-format/mnemonic/plugin-files)<a href="https://agentmods.dev/instructions/modeled-information-format/mnemonic/plugin-files"><img src="https://agentmods.dev/badge/instructions/modeled-information-format/mnemonic/plugin-files/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/instructions/modeled-information-format/mnemonic/plugin-files"><img src="https://agentmods.dev/badge/instructions/modeled-information-format/mnemonic/plugin-files.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 | $0.00222 | $0.00222 |
| Opus 5.5 | $0.00089 | $0.00089 |
| Sonnet 5.5 | $0.00044 | $0.00044 |
| Haiku 4.5 | $0.00022 | $0.00022 |
Grade A, and why
mnemonic plugin-files.instructions.md 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
Claude Code Plugin File Guidelines
Commands (commands/*.md)
Required frontmatter:
---
name: command-name
description: Brief description of what the command does
---
Content structure:
- Clear usage instructions
- Examples with expected behavior
- Error handling guidance
Skills (skills/*/SKILL.md)
Required frontmatter:
---
name: skill-name
description: What this skill provides
---
Content structure:
- Domain knowledge and context
- Step-by-step procedures
- Decision criteria
- Examples and templates
Agents (agents/*.md)
Required frontmatter:
---
name: agent-name
description: Agent's purpose and capabilities
---
Content structure:
- Agent role and responsibilities
- Available tools and actions
- Workflow patterns
- Integration points
General Guidelines
- Use clear, imperative language
- Include practical examples
- Reference related commands/skills
- Keep frontmatter minimal but complete
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 · 60 lines · 222 tokens per session scan A f34e192989cd
mnemonic plugin-files.instructions.md is an instructions file published in the GitHub repository modeled-information-format/mnemonic (23 stars, last pushed 4d ago), licensed MIT. It adds 222 tokens to every session, about $0.0009 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 2026-08-30.
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