human-interact-expert

human-interact-expert is a skill for Claude Code, Codex from vosslab/vosslab-skills. It costs 48 tokens per session (991 once invoked), scanned A, original, MIT.

A guide for designing and evaluating how people use computer interfaces. HCI, or human-computer interaction, covers usability, accessibility, user research, task analysis, and interaction design.

In plain words
What is it for?
Use it to plan user studies, analyze tasks, evaluate usability, choose HCI research methods, design accessibility criteria, or assess interaction patterns and mental models.
Why use it?
It helps turn vague interface questions into a clear method, evidence plan, and criteria for deciding whether a design works for its intended users.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the vosslab-skills plugin — 42 skills, 14 agents shipped together

Good fit Use it to plan user studies, analyze tasks, evaluate usability, choose HCI research methods, design accessibility criteria, or assess interaction patterns and mental models.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vosslab/vosslab-skills/human-interact-expert
Install

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.

Any agent
npx skills add vosslab/vosslab-skills --skill human-interact-expert
Clone the repo
git clone --depth 1 https://github.com/vosslab/vosslab-skills

Made for: Claude Code, Codex.

Or install vosslab-skills, the plugin that ships this one along with the rest of its 42 skills, 14 agents.

Wrote 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.

agentmods badge for human-interact-expert

README.md
[![agentmods](https://agentmods.dev/badge/skills/vosslab/vosslab-skills/human-interact-expert/github.svg)](https://agentmods.dev/skills/vosslab/vosslab-skills/human-interact-expert)
Your own site
<a href="https://agentmods.dev/skills/vosslab/vosslab-skills/human-interact-expert"><img src="https://agentmods.dev/badge/skills/vosslab/vosslab-skills/human-interact-expert/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.

agentmods 80×15 button for human-interact-expert

Your own site · 80×15
<a href="https://agentmods.dev/skills/vosslab/vosslab-skills/human-interact-expert"><img src="https://agentmods.dev/badge/skills/vosslab/vosslab-skills/human-interact-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 991 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00048 $0.00991
Opus 5 $0.00024 $0.00495
Sonnet 5 $0.00010 $0.00198
Haiku 4.5 $0.00005 $0.00099

Measured 9d ago against content hash 072e1c29ec7b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

human-interact-expert 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.

skills/experts/human-interact-expert/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Human interaction expert

Overview

Use this skill to turn a product question into an evidence-based HCI method, task model, guideline rationale, or evaluation plan. Frame the user goal, context, and success evidence before selecting an interaction method. Build project-specific artifacts such as a task model, study plan, heuristic ledger, and accessibility acceptance criteria so each recommendation can guide implementation and later evaluation.

Workflow

  1. Classify the HCI question and select a method.
  • Identify the user group, goal, setting, device, task frequency, consequence of failure, and decision the team needs to make.
  • Read references/task_selection.md when the request could use research, task analysis, guidelines, or evaluation.
  • Consult references/topic_index.md to connect the question to a method, evidence artifact, guideline source, and oracle.
  1. Detect the project shape and establish the evidence baseline.
  • Existing project: inventory user journeys, research findings, support issues, analytics, interface states, accessibility checks, and prior study results.
  • Greenfield project: write a concise HCI brief with users, goals, context, assumptions, risks, and success measures before interface construction.
  • Read references/project_workflow.md for the project-shape path and required HCI artifacts.
  1. Model the user's task and mental model.
  • Map triggers, goals, actions, decisions, information needs, errors, recovery, handoffs, and completion evidence for each critical task.
  • Capture the user's vocabulary, expectations, and visible cues that support recognition, memory, and confidence at each decision point.
  • Turn the model into testable task-completion criteria and a study scenario.
  1. Select the smallest method that answers the decision.
  • Choose interviews or contextual inquiry for unknown context and mental models.
  • Choose task analysis for workflow structure and allocation questions.
  • Choose cognitive walkthrough or heuristic evaluation for expert inspection.
  • Choose usability sessions for observed task completion and comprehension.
  • Choose an evaluation study when a hypothesis, comparison, or measured outcome requires controlled or naturalistic evidence.

Read the full file on GitHub · 95 lines

Files

What ships with it

7 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.

Changes

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.

  1. 9d ago First seen · 95 lines · 48 tokens per session scan A 072e1c29ec7b

Subscribe to this mod's changes

human-interact-expert is a skill published in the GitHub repository vosslab/vosslab-skills (2 stars, last pushed 13d ago), licensed MIT. It adds 48 tokens to every session and 991 once invoked, about $0.0002 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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