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 design-pattern-selectorgit 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/design-pattern-selector)<a href="https://agentmods.dev/skills/bookforge-ai/bookforge-skills/design-pattern-selector"><img src="https://agentmods.dev/badge/skills/bookforge-ai/bookforge-skills/design-pattern-selector/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/design-pattern-selector"><img src="https://agentmods.dev/badge/skills/bookforge-ai/bookforge-skills/design-pattern-selector.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 | $0.00180 | $0.04324 |
| Opus 5 | $0.00090 | $0.02162 |
| Sonnet 5 | $0.00036 | $0.00865 |
| Haiku 4.5 | $0.00018 | $0.00432 |
Grade A, and why
design-pattern-selector 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 9d 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
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.
- 9d ago First seen · 356 lines · 180 tokens per session scan A 2a204547997c
design-pattern-selector is a skill published in the GitHub repository bookforge-ai/bookforge-skills (35 stars, last pushed 4mo ago), licensed CC-BY-SA-4.0. It adds 180 tokens to every session and 4,324 once invoked, about $0.0009 per session on Opus 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
design-patterns
Classic and modern software design patterns.
refactor
Refactors specified code to improve clarity, reduce duplication, or align with the project's architectural patterns — without changing external behavior. Invoked when the user asks to refactor, clean up, simplify, or restructure code.
pattern
Judge whether a UI component need should use an existing shadcn/ui, 21st.dev, or ReUI component, or requires a custom build guided by a real-app reference from Mobbin/Figma Community.
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.
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…