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 Wondermonger-daydreaming/claude-skills-library --skill design-reductiongit clone --depth 1 https://github.com/Wondermonger-daydreaming/claude-skills-libraryWrote 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/wondermonger-daydreaming/claude-skills-library/design-reduction)<a href="https://agentmods.dev/skills/wondermonger-daydreaming/claude-skills-library/design-reduction"><img src="https://agentmods.dev/badge/skills/wondermonger-daydreaming/claude-skills-library/design-reduction/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/wondermonger-daydreaming/claude-skills-library/design-reduction"><img src="https://agentmods.dev/badge/skills/wondermonger-daydreaming/claude-skills-library/design-reduction.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 | $0.00214 | $0.01214 |
| Opus 5 | $0.00107 | $0.00607 |
| Sonnet 5 | $0.00043 | $0.00243 |
| Haiku 4.5 | $0.00021 | $0.00121 |
Grade A, and why
design-reduction 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 12d 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 — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Reduction
Seed, not scripture
The source frames this through three named designers and a famous failure-count. The names and the number are mnemonics, not authorities. Don't invoke "as [designer] said" or recite the failure tally as proof — that's borrowing prestige instead of doing the work. What transfers is the method: three movements and one test, runnable on any artifact. Strip the attribution; keep the cut.
What it is
Reduction not as impoverishment but as concentration — removing everything that isn't load-bearing until what remains feels inevitable, as though it had always existed and you merely uncovered it. This is the compressive complement to /inventor-stance: where that pole proliferates, exapts, and courts new functions, this pole strips, cuts, and clarifies. Real making oscillates between the two — invent wide, then reduce hard.
The three movements
- Revelation. Subtraction as unveiling: remove until only the essence shows. The aim is the object that feels pre-existing, that no longer looks designed because it looks necessary. The void shapes the solid — what you take away does as much work as what you leave.
- Failure-iteration. Reduction is rarely found in one pass; it's crashed into. Smash the prototype, read the error log as propulsion, let each failure teach the topology of the impossible until the working form emerges from the debris. Catastrophe as catalyst — but only if the failure returns information.
- Concentration. Every deletion amplifies what remains; the surviving elements carry the weight of the murdered alternatives. Density is honesty: the more you compress without loss, the more each element has to mean. Minimalism here is not less — it is more, per unit.
The method and the test
The loop: see the problem clearly (what actually needs doing?), remove everything in the way (what is obstruction rather than essence?), iterate until obvious (what works so plainly it needs no defense?). Apply across media — in prose every word either solves or disappears; in code, complexity serves clarity not cleverness; in argument, each claim earns its keep or goes.
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.
- 12d ago First seen · 48 lines · 214 tokens per session scan A c4ef080484ed
design-reduction is a skill published in the GitHub repository Wondermonger-daydreaming/claude-skills-library (6 stars, last pushed 2mo ago), licensed MIT. It adds 214 tokens to every session and 1,214 once invoked, about $0.0011 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 2026-08-31.
Other skills, from other repositories
design-feature
Turn a raw idea or existing feature into a designed product SPEC by completing entity, integration, role, and expectation closure. Upserts never destroy recorded decisions. Triggers: "design-feature", "design this feature", "define product scope".
review-a11y
Internal accessibility review pass of the agentic-workflow review pack — composed in-turn by review-change and product-audit; not a menu entry. Checks the changed user-facing surface for accessibility: semantics, keyboard, focus, contrast, and ARIA correctness — applies only to user-facing surfaces. Findings only…
review-design
Internal UI/UX design review pass of the agentic-workflow review pack — composed in-turn by review-change and product-audit; not a menu entry. Checks the changed UI against the project's design doc: consistency, states, responsiveness, and reuse — applies only when the project has a UI and the change touches it.…
information-architecture
Map the user journey first, then derive the screen inventory, navigation and hierarchy from it, flagging any screen that serves no journey step. Writes the four-part markdown plus an HTML diagram of the step-to-screen mapping. Use after the brief is settled and before tokens or UI.
persona-acid-test
Stress-test a design through three lenses, confused user, skeptical engineer and impatient PM, before it goes to a stakeholder. Requires an actual design, an HTML file, Figma link or screenshot.
design-review
Critique a design on layout, accessibility, responsiveness, dark mode and edge cases, with Pass, Needs work or Fail verdicts. Use on a built screen.