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 skills add slbug/claude-ruby-grape-rails --skill compoundgit 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/skills/slbug/claude-ruby-grape-rails/compound)<a href="https://agentmods.dev/skills/slbug/claude-ruby-grape-rails/compound"><img src="https://agentmods.dev/badge/skills/slbug/claude-ruby-grape-rails/compound/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/slbug/claude-ruby-grape-rails/compound"><img src="https://agentmods.dev/badge/skills/slbug/claude-ruby-grape-rails/compound.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Rogue Agent · line 204 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
- high Rogue Agent · line 220 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
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 | $0.00039 | $0.01964 |
| Opus 5.5 | $0.00016 | $0.00786 |
| Sonnet 5.5 | $0.00008 | $0.00393 |
| Haiku 4.5 | $0.00004 | $0.00196 |
Grade A, and why
rb:compound 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.
How it starts
The opening of the file, as written. The whole thing — 283 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Compound Knowledge
Capture a solved problem as reusable knowledge. This creates a knowledge base that helps future sessions solve similar problems faster.
What to Compound
Compound problems that:
- Took significant time to solve (> 30 minutes)
- Involved multiple files or systems
- Required debugging or root cause analysis
- Have reusable patterns or lessons
- Others might encounter
Don't compound:
- Trivial syntax errors
- One-line fixes
- Problems specific to unique project state
- Already well-documented issues
Compound Process
START ──▶ VALIDATE AGAINST SCHEMA ──▶ USE RESOLUTION TEMPLATE ──▶ WRITE DOC
│
▼
UPDATE INDEX
│
▼
DONE
Document Structure
Solution documents use YAML frontmatter defined in ${CLAUDE_SKILL_DIR}/references/schema.md and follow the template in ${CLAUDE_SKILL_DIR}/references/resolution-template.md.
Required Frontmatter Fields
module: Ruby module or context area (e.g., "Accounts", "Hotwire/Turbo.UserList")date: Creation date in YYYY-MM-DD formatproblem_type: Category of problem (build_error, test_failure, runtime_error, etc.)component: Affected component area (active_record_model, hotwire_mount, sidekiq_job, etc.)symptoms: Array of 1-5 observable symptoms (error messages, unexpected behavior)root_cause: Detailed explanation of WHY this happenedseverity: critical, high, medium, or lowtags: Array of up to 8 searchable keywords (lowercase, hyphen-separated)
Optional Fields
ruby_version/rails_version: Specific version pattern X.Y.Ziron_law_number: Integer (1-22) indicating which Iron Law was violatedrelated_solutions: Array of file paths to related solutions
Example Compound Document
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 283 lines · 39 tokens per session scan A 82e58b9c8c5e
rb:compound is a skill published in the GitHub repository slbug/claude-ruby-grape-rails (7 stars, last pushed 17d ago), licensed MIT. It adds 39 tokens to every session and 1,964 once invoked, about $0.0002 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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