see-ui

see-ui is a skill for Claude Code, Codex from angadhn/botference. It costs 59 tokens per session (944 once invoked), scanned A, original, MIT.

A visual checking workflow for web pages that renders them in a browser and saves screenshots at phone and desktop sizes. You inspect the images to see layout and design problems that code checks may miss.

In plain words
What is it for?
Use it after building or changing a web interface, when someone says it looks wrong, or when checking local HTML, SVG, reports, charts, and running web services.
Why use it?
A page can have valid HTML, working CSS, and no console errors while still looking broken. Screenshots reveal issues such as cramped charts, bad spacing, or a layout that fails on mobile.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/angadhn/botference/see-ui
Any agent
npx skills add angadhn/botference --skill see-ui
Clone the repo
git clone --depth 1 https://github.com/angadhn/botference

Made for: Claude Code, Codex.

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 see-ui

README.md
[![agentmods](https://agentmods.dev/badge/skills/angadhn/botference/see-ui.svg)](https://agentmods.dev/skills/angadhn/botference/see-ui)
Your own site
<a href="https://agentmods.dev/skills/angadhn/botference/see-ui"><img src="https://agentmods.dev/badge/skills/angadhn/botference/see-ui.svg" alt="Measured on agentmods" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 944 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00059 $0.00944
Opus 5 $0.00030 $0.00472
Sonnet 5 $0.00012 $0.00189
Haiku 4.5 $0.00006 $0.00094

Measured 4d ago against content hash f1b1ce8dec99, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

see-ui 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 4d 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.

.agents/skills/see-ui/SKILL.md · 75 lines

How it starts

The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.

see-ui — look at the page before you say it's done

Layout and design failures are invisible to your normal loop: the DOM is valid, the CSS applied, the console silent — and the page is still broken to a human eye (a chart squashed into 5% of its width renders "successfully"). Code and logs cannot catch "technically correct but looks wrong". Pixels can, and you can read pixels.

The command

botference see <target> [label] [--viewport WxH]... [--basic-auth U:P] [--out DIR]
  • <target>: a URL, a bare :port (localhost), a local file path (HTML, SVG — rendered via file://, no server needed: the way to verify charts, reports, and mockups you just wrote), or the NAME of a running botference service — its listening port is discovered from the live process, you never need to know it.
  • Never hand-roll rendering via ImageMagick/qlmanage/rsvg to check a chart — their SVG engines have artifacts Chrome does not; see is the trustworthy lane and works from your sandbox.
  • Default viewports: 390x844 (phone — real mobile layout, since responsive CSS answers to viewport width) and 1440x900 (desktop).
  • It prints wrote: <path>.png lines. Read those images. That is the entire point — do not run the command and skip looking.
  • Output defaults to .botference/shots/ (gitignored by convention).

Protocol

  1. After ANY change that affects rendered UI, screenshot both default viewports and look at them before reporting the change as done.
  2. When a human reports something "looks wrong/bad/off", screenshot FIRST, at the viewport they used (phone screenshots → 390x844), and compare with what they see. Do not reason about CSS from source alone.
  3. If the app has a login form, your screenshot will show only the gate. Fix that properly: let bare-localhost requests through unauthenticated (the review engine's rule — anyone on the loopback port already owns the machine). --basic-auth helps only for HTTP basic auth, not form gates.
  4. Charts and figures: vision discovers a failure class once — then lock it out forever with a deterministic test on the generated SVG/scales, no browser needed. Assert data coverage (observed data spans ≥ ~half the x-range; projections must not compress history), containment (points inside the plot area, y-domain spans the data, no NaN coordinates), and legibility (labels don't collide, sane tick counts, markers above minimum visible size). Every visual chart fix ships with the invariant test that would have failed on the bad render.

Read the full file on GitHub · 75 lines

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. 4d ago First seen · 75 lines · 59 tokens per session scan A f1b1ce8dec99

Subscribe to this mod's changes

see-ui is a skill published in the GitHub repository angadhn/botference (19 stars, last pushed yesterday), licensed MIT. It adds 59 tokens to every session and 944 once invoked, about $0.0003 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.

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