Borrowing it
Nothing to install: this file belongs to slbug/claude-ruby-grape-rails. 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/slbug/claude-ruby-grape-rails/main/.github/instructions/plugin-review.instructions.mdgit clone --depth 1 https://github.com/slbug/claude-ruby-grape-railsWrote 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/slbug/claude-ruby-grape-rails/plugin-review)<a href="https://agentmods.dev/instructions/slbug/claude-ruby-grape-rails/plugin-review"><img src="https://agentmods.dev/badge/instructions/slbug/claude-ruby-grape-rails/plugin-review/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/slbug/claude-ruby-grape-rails/plugin-review"><img src="https://agentmods.dev/badge/instructions/slbug/claude-ruby-grape-rails/plugin-review.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 | $0.05496 | $0.05496 |
| Opus 5.5 | $0.02198 | $0.02198 |
| Sonnet 5.5 | $0.01099 | $0.01099 |
| Haiku 4.5 | $0.00550 | $0.00550 |
Grade A, and why
claude-ruby-grape-rails plugin-review.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 15d 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.
How it starts
The opening of the file, as written. The whole thing — 408 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Plugin File Review Rules
Audience: Agents, Not Humans
Plugin docs (agents/, skills/, references/) load into agent
context at runtime. Flag prose that violates the imperative-only
rule:
- Tutorial narration ("first do X, then Y") → flag, suggest imperative rewrite
- Reasoning preludes before commands → flag
#thinking/checklist lines inside Bash command bodies (preference #6) → flag, suggest markdown table or prose lead-in- Long explanatory paragraphs where a table fits → flag
Exception files (human-facing, narrative OK): README.md,
CHANGELOG.md, scripts/, lab/eval/.
Agent Conventions (plugins/**/agents/*.md)
- Agents use YAML frontmatter. Common: name, description, model,
disallowedTools, omitClaudeMd, skills, memory. Also valid per CC docs:
tools, effort, maxTurns, background, isolation, color, and
experimental.cacheTtl. The plugin-supported set (https://code.claude.com/docs/en/plugins/components, "Frontmatter fields in plugin agents") ignorespermissionMode,hooks,mcpServers, andinitialPrompt. Do NOT add those to plugin agents underplugins/**/agents/ - Prefer denylist-only (
disallowedTools:) over allowlist (tools:). A missingtools:field is intentional — agents inherit all tools minus those in disallowedTools - Artifact-writing agents:
disallowedTools: Edit, NotebookEdit, Agent, EnterWorktree, ExitWorktree, Skill - Conversation-only agents add
Writeto the above - NO agent declares or invokes
Agent— orchestration lives in skill bodies (main session). See.claude/rules/agent-development.md§ "Subagents Are Leaf Workers" for full doctrine. - Agents with intentionally narrow tool sets (web-researcher,
output-verifier, ruby-gem-researcher) use
tools:allowlists — this is correct omitClaudeMd: trueis correct for specialist agents that do not need contributor CLAUDE.md context- Do NOT flag
permissionModeas missing — Claude Code ignores it on plugin agents - Model tiers: opus for security-critical agents, sonnet for most specialists,
haiku for mechanical tasks.
opusplanis a session-level/modelalias only (the subagent frontmatter table at https://docs.claude.com/en/docs/claude-code/sub-agents does NOT list it as a valid subagentmodelvalue) — do NOT flag its absence from agent frontmatter as a gap - Descriptions must be <= 250 characters
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.
- 15d ago Changed · +2 lines be8616ec1068
- 1mo ago First seen · 406 lines · 5,496 tokens per session scan A 70e1a05c4104
claude-ruby-grape-rails plugin-review.instructions.md is an instructions file published in the GitHub repository slbug/claude-ruby-grape-rails (7 stars, last pushed 16d ago), licensed MIT. It adds 5,496 tokens to every session, about $0.0220 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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