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 bookforge-ai/bookforge-skills --skill command-pattern-implementorgit clone --depth 1 https://github.com/bookforge-ai/bookforge-skillsWrote 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/bookforge-ai/bookforge-skills/command-pattern-implementor)<a href="https://agentmods.dev/skills/bookforge-ai/bookforge-skills/command-pattern-implementor"><img src="https://agentmods.dev/badge/skills/bookforge-ai/bookforge-skills/command-pattern-implementor/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/bookforge-ai/bookforge-skills/command-pattern-implementor"><img src="https://agentmods.dev/badge/skills/bookforge-ai/bookforge-skills/command-pattern-implementor.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 | $0.00099 | $0.05558 |
| Opus 5.5 | $0.00040 | $0.02223 |
| Sonnet 5.5 | $0.00020 | $0.01112 |
| Haiku 4.5 | $0.00010 | $0.00556 |
Grade A, and why
command-pattern-implementor 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.
The source is not reproduced here
Licensed CC-BY-SA-4.0
The repository is licensed CC-BY-SA-4.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
1 file 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 · 456 lines · 99 tokens per session scan A 0001d2808653
command-pattern-implementor is a skill published in the GitHub repository bookforge-ai/bookforge-skills (41 stars, last pushed 6mo ago), licensed CC-BY-SA-4.0. It adds 99 tokens to every session and 5,558 once invoked, about $0.0004 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.
Other skills, from other repositories
pattern
Use when building, prototyping or scaffolding UI (a component, page or screen), especially from a Figma link, mockup or screenshot. Checks the project's own design system first to decide reuse versus build, returns the exact unmet requirements to build, then verifies the built file. Skip trivial primitives (button…
principle-product-design
UX and product design principles — Nielsen's 10 usability heuristics, visual hierarchy, interaction design patterns, design-system compliance, and responsive layout. Accessibility/WCAG conformance is delegated to swe-workbench:principle-accessibility. Auto-load when reviewing UX, evaluating usability, assessing visual…
principle-accessibility
Accessibility (a11y) principles — WCAG 2.2 AA conformance, semantic HTML, keyboard navigation, focus management, focus traps, color contrast, alt text, screen reader compatibility, reduced motion. Auto-load when reviewing frontend or UI code, evaluating ARIA usage, auditing color contrast, building modals or dialogs…
principle-design-patterns
Design patterns — Gang of Four and beyond. Strategy, factory method, observer, adapter, template method, dependency injection. Auto-load when designing class structure, or evaluating whether a pattern applies.
architecture-analyst
Use this agent when you need to evaluate a system architecture or technology decision — identifying scalability risks, structural smells, law violations (Conway, Amdahl, Gall), and design pattern misuse using the Episteme knowledge graph.
episteme-advisor
Use this agent when the user faces an engineering decision, trade-off, or architecture question — choosing between patterns, resolving design conflicts, or applying refactorings. Grounds every recommendation in the Episteme knowledge graph.