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  1. TESIGN / RADAR
  2. 2026.09.30
  3. assay

assay

Auto-check a web page for bugs

WHO USES ITDevelopers who want to check their own web pages before shipping.

Install to use

Drives your web page in a real browser and tells you what broke.

INSTALL
START IN 5 MINUTES ↓
An assay result: a failure report that a tag filter pressed twice left the first click in effect, with before and after page views.

TESIGN TAKE

Because it needs no AI and gives repeatable results, it suits re-running after every fix.

Activity and discovery evidence
★ 100▲ 1 HN

100 stars · checked on GitHub · no 7-day star increase observed (GH Archive) (as of ) · 1 Show HN points observed

NEW 1h OLD WHEN SEEN

AT A GLANCE

LICENSE
MIT
USAGE
Use, change and redistribute, commercially too. Keep the notice.
LANGUAGE
HTML
PLATFORM
cli
ACTIVITY
last commit within 24 h () · latest release v0.2.2 () · 8 releases
COMMUNITY
1 contributor · 0 open issues (incl. PRs) · made by: an individual
SOURCES
Show HN
OPEN SOURCE
YES
FIRST SEEN
CATEGORY
DEV TOOLS

A summary, not legal advice.

WHY IT MATTERS

Writing tests is a chore, so many changes ship unchecked. assay finds every control on the page, uses all of them, and reports what went wrong.

BUILD FROM THIS

  • It opens the page in Chromium and builds its checks from the controls it finds. If pressing a tag filter twice leaves the list filtered, it reports that with before and after views. No test code, no LLM, no API key, and every run gives the same result. A skill for coding agents is included.

WHO IT'S FOR

Developers who want to check their own web pages before shipping.

START IN 5 MINUTES

# Install with pip install assay-ui and run it on the address of the page you want to check.

CAVEATS

  • Needs Python and Chromium. Recently released, with 98 stars.

RECEIPT

FIRST SEEN
AT SOURCE
KEPT
CREATED → FIRST SEEN
1h
WHEN FIRST SEEN
98 ★
SOURCES
Show HN

The same facts in machine-readable form — View as Markdown · JSON

SIMILAR TOOLS

Up to five from DEV TOOLS by ★ total: edited entries first, then repository cards; this entry is highlighted. Drawn from the same stored snapshot as the rankings — a comparison, not a recommendation.

IMAGENAME★ TOTAL▲ 7dLICENSEPLATFORMLAST PUSH
ECC README banner: headline 'The operating system for AI agent harnesses', harness chips, and skill, agent and command lists.
eccSkills, memory and security for agents★ 270k▲ +35MITpermissivewindows · macos · linux · cli
DeepSeek Harness landing: blue background, the headline 'Everything is a plugin' and a quick-start box with the npx command.
DeepSeek HarnessPlugin agent harness for developers★ 240k▲ +51MITpermissiveweb · cli
ponytail.dev landing page: a line-drawn developer with a ponytail on black, the title 'ponytail' and an install button.
ponytailMake your agent write less code★ 148k▲ +23MITpermissive—
Spec Kit docs landing page — the headline 'Build with a spec, fix a bug, or assess an idea' and the uv tool install specify-cli command
Spec KitSpec-first process for coding agents★ 139k▲ +2MITpermissivecli · windows · macos · linux
An assay result: a failure report that a tag filter pressed twice left the first click in effect, with before and after page views.
assayAuto-check a web page for bugsTHIS ENTRY★ 100—MITpermissivecli

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  1. Repository created
  2. Show HN post ↗
  3. FIRST SEEN BY TESIGN
  4. Published on TESIGN

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