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 wahidyankf/ose-public --skill web-testing-usability-heuristicsgit clone --depth 1 https://github.com/wahidyankf/ose-publicWrote 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/wahidyankf/ose-public/web-testing-usability-heuristics)<a href="https://agentmods.dev/skills/wahidyankf/ose-public/web-testing-usability-heuristics"><img src="https://agentmods.dev/badge/skills/wahidyankf/ose-public/web-testing-usability-heuristics/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/wahidyankf/ose-public/web-testing-usability-heuristics"><img src="https://agentmods.dev/badge/skills/wahidyankf/ose-public/web-testing-usability-heuristics.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 | $0.00073 | $0.00894 |
| Opus 5.5 | $0.00029 | $0.00358 |
| Sonnet 5.5 | $0.00015 | $0.00179 |
| Haiku 4.5 | $0.00007 | $0.00089 |
Grade A, and why
web-testing-usability-heuristics scanned grade A with 1 finding 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 2d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- `reference/10-browser-driving.md` — how to drive the browser (WebFetch/curl/Playwright). How it starts
The opening of the file, as written. The whole thing — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Web Usability Testing — Heuristic Evaluation Methodology
Full methodology for swe-usability-tester: how to evaluate a live site's first-time comprehension
against established usability science, without reading specs, source, or mockups.
Reference Modules
reference/01-why-this-agent-exists-and-inputs.md— why this agent exists, invocation inputs.reference/02-spec-blind-discipline.md— the Spec-Blind Discipline (hard rule).reference/03-relationships-and-nondestructive-constraint.md— relationship toswe-web-tester(exploratory charter)/swe-web-tester(design charter)/swe-reviewer, the Non-Destructive Constraint.reference/04-heuristic-evaluation-and-walkthrough.md— Nielsen's 10 heuristics, the cognitive-walkthrough four questions, first-click/information-scent analysis, the naive-user stance.reference/05-usability-dimensions-checklist-part1.mdandreference/06-usability-dimensions-checklist-part2.md— the full dimensions checklist (predictability, consistency, information scent, edge states, error prevention, cognitive load, affordance, etc.).reference/07-mandatory-probes-a-b-c.mdandreference/08-mandatory-probe-d-and-url-naturalness.md— the four Mandatory Systematic Probes (conditional-control discoverability, jargon scan, cross-view redundancy, unit/currency consistency) and URL Naturalness.reference/09-responsive-usability.md— Responsive Usability at mobile/tablet/desktop.reference/10-browser-driving.md— how to drive the browser (WebFetch/curl/Playwright).reference/11-suggesting-new-behaviour-for-specs.md— how to proposespec-suggestions.mdentries without breaking the spec-blind stance.reference/12-finding-anatomy-and-severity.md— the fullUWT-###finding anatomy and the Nielsen 0-4 severity scale.reference/13-output-modes-overview.mdandreference/14-output-mode-plan-and-delivery.md— the output-mode selection table and theplan/deliverymodes' document sets.reference/15-output-mode-localtmp-procedure-and-quality.md— thelocal-tmpmode, the 11-step procedure summary, and quality guidelines.reference/16-constraints.md— hard constraints.
What ships with it
18 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.
- README.md 605 B
- reference/browser-driving.md 2.2 KB
- reference/constraints.md 1009 B
- reference/finding-anatomy-and-severity.md 2.9 KB
- reference/heuristic-evaluation-and-walkthrough.md 3.3 KB
- reference/mandatory-probe-d-and-url-naturalness.md 2.4 KB
- reference/mandatory-probes-a-b-c.md 2.5 KB
- reference/output-mode-localtmp-procedure-and-quality.md 3.2 KB
- reference/output-mode-plan-and-delivery.md 4.3 KB
- reference/output-modes-overview.md 1.9 KB
- reference/README.md 2.3 KB
- reference/relationships-and-nondestructive-constraint.md 3.2 KB
- reference/responsive-usability.md 1.9 KB
- reference/spec-blind-discipline.md 1.7 KB
- reference/suggesting-new-behaviour-for-specs.md 1.9 KB
- reference/usability-dimensions-checklist-part1.md 3.3 KB
- reference/usability-dimensions-checklist-part2.md 1.5 KB
- reference/why-this-agent-exists-and-inputs.md 3.0 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.
- 2d ago First seen · 56 lines · 73 tokens per session scan A bf415a89ac00
web-testing-usability-heuristics is a skill published in the GitHub repository wahidyankf/ose-public (12 stars, last pushed today), licensed MIT. It adds 73 tokens to every session and 894 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-14.
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