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 Eid0lon/zero-slop --skill perfect-uxgit clone --depth 1 https://github.com/Eid0lon/zero-slopWrote 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/eid0lon/zero-slop/perfect-ux)<a href="https://agentmods.dev/skills/eid0lon/zero-slop/perfect-ux"><img src="https://agentmods.dev/badge/skills/eid0lon/zero-slop/perfect-ux.svg" alt="Measured on agentmods" 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 | $0.00108 | $0.01754 |
| Opus 5 | $0.00054 | $0.00877 |
| Sonnet 5 | $0.00022 | $0.00351 |
| Haiku 4.5 | $0.00011 | $0.00175 |
Grade A, and why
perfect-ux 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 7d 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 — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Perfect UX
Status: beta.
Perfect UX is the user-success layer. perfect-design makes the interface coherent and product-specific; no-slop blocks generic AI residue; reality-skill makes workflows real. Perfect UX asks: can the intended user understand what to do, finish the job, recover from problems, trust the system, and get faster over time?
Command Interface
Use references/command-interface.md.
Primary commands:
perfect-ux --contract [brief-or-target]
perfect-ux --map [brief-or-target]
perfect-ux --audit [target]
perfect-ux --fix [target]
perfect-ux --harden [target]
perfect-ux --judge [target]
perfect-ux --verify [target]
perfect-ux -e --audit [target]
Short flags:
-c,--contract: write the UX Contract before code.-m,--map: map jobs, entry points, decisions, states, and recovery paths.-a,--audit: find UX friction, ambiguity, accessibility blockers, trust gaps, and missing evidence.-f,--fix: make the smallest coherent UX improvement pass.--harden: add resilience, edge states, keyboard paths, recovery, and proof.-j,--judge: run the strict UX judge panel.--verify: prove the primary journey with build, tests, browser, accessibility, and task evidence.-e,--economy: disable live subagent judges only when the user explicitly accepts a lower-cost review.
Default mode:
- Existing UI target:
--audit. - Editable request on an existing target:
--fix. - Brief without target:
--contract.
First Action
Load steps/step-00-command-router.md.
Step 00 parses command flags, discovers the product surface, resolves UX dials, loads only relevant references, and routes to contract, map, audit, fix, harden, judge, or verify.
Core References
Load only what the task needs:
references/command-interface.md: grammar, precedence, output contracts.references/dials-and-presets.md: UX dials, presets, and pass thresholds.references/research-synthesis.md: compressed research from NN/g, W3C/WAI, WCAG, GOV.UK, Apple HIG, Material, Fluent, Baymard, web.dev, design systems, and Human-AI guidance.references/research-source-ledger.md: source map and what each source contributes.references/ux-contract.md: pre-code contract and rejection rules.references/ux-gates.md: the hard UX gates used for audit, fix, harden, and judge.references/journey-playbook.md: jobs, IA, flow mapping, decision paths, onboarding, dashboards, commerce, AI tools, and expert use.references/interaction-playbook.md: controls, forms, feedback, validation, recovery, keyboard, motion, mobile, and performance feel.references/content-and-trust.md: UX writing, labels, claims, AI uncertainty, empty states, errors, consent, and trust boundaries.references/measurement-and-research.md: usability testing, analytics, task metrics, research method choice, and evidence loops.references/ecosystem-contract.md: ownership and composition with sibling skills.references/judge-system.md: judge protocol and gate formula.references/verification-playbook.md: build/browser/accessibility/task verification.references/self-coaching.md: internal checklist for stuck or ambiguous UX decisions.
What ships with it
23 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.
- agents/openai.yaml 303 B
- references/command-interface.md 2.1 KB
- references/content-and-trust.md 2.6 KB
- references/dials-and-presets.md 4.6 KB
- references/ecosystem-contract.md 2.2 KB
- references/interaction-playbook.md 3.4 KB
- references/journey-playbook.md 3.9 KB
- references/judge-system.md 2.9 KB
- references/measurement-and-research.md 2.3 KB
- references/research-source-ledger.md 4.8 KB
- references/research-synthesis.md 5.0 KB
- references/self-coaching.md 1.8 KB
- references/ux-contract.md 2.7 KB
- references/ux-gates.md 5.4 KB
- references/verification-playbook.md 2.0 KB
- scripts/perfect_ux_cli.py 32 KB runs code
- scripts/test_perfect_ux_cli.py 5.7 KB runs code
- steps/step-00-command-router.md 2.3 KB
- steps/step-01-ux-contract.md 1011 B
- steps/step-02-journey-audit.md 1.3 KB
- steps/step-03-improve.md 1.4 KB
- steps/step-04-judge.md 1.3 KB
- steps/step-05-verify.md 1.2 KB
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.
- 7d ago First seen · 167 lines · 108 tokens per session scan A 1567b2f6f369
perfect-ux is a skill published in the GitHub repository Eid0lon/zero-slop (12 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 108 tokens to every session and 1,754 once invoked, about $0.0005 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.
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