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AI quality agent

jank.ai

Validation that keeps up with your coding agent.

AI generates code quickly. Jank independently inspects what changed, checks the product, returns fix-ready evidence, and revalidates the repair—removing defects and friction before users find them.

Request Jank access See /jank work
Works with
  • Claude
  • Codex
  • Cursor
  • Antigravity
  • MCP agents
Automation frameworks and suites
  • Playwright
  • Selenium
  • Cypress
  • pytest
  • JUnit
  • Vitest
  • Jest
  • Robot Framework
  • Manual cases

One command

Jank knows what to check.

Jank analyzes recent changes and does quick, targeted validation where it matters most. Use /jank as-is, or add any focus in plain language.

More specialized commandsOptional
Coding agent · local projectRun demo
Agent thread/jank

AI coding agent

Feature work complete. I added declined-payment recovery, guarded retry behavior, and mobile payment error handling to the fictional Northstar Shop checkout.

You

/jank

Jank

I’m validating the fictional Northstar Shop checkout. Initial Jank score: 12, based on the changed files and existing checks before I explore the running app.12 Jank

Jank

Issue 1 found: declined-card recovery loses the selected Express delivery option.35 Jank

Jank

Issue 2 found: double-clicking Try again can submit the order twice.61 Jank

Jank

Issue 3 found: the mobile payment error is invisible to screen readers.84 Jank

AI coding agent

I have all three repros. I’m preserving checkout state, guarding duplicate requests, and repairing the accessible error.84 Jank

Jank

Delivery recovery fix verified across decline, retry, refresh, and back navigation.48 Jank

AI coding agent

Duplicate submission and accessible error-state fixes applied.18 Jank

Jank

Revalidation complete. All three reproduced bugs are fixed in the checked journeys.4 Jank

The demo waits for you. Click “Run demo” to watch the selected Jank workflow; illustrative values are labeled as a product demonstration, not a claim about your project.

The validation loop

Find it. Fix it. Prove it.

Jank closes the gap between code generation and trustworthy software without turning a passing-check count into false confidence.

01

Understand the change.

Read the diff, project structure, available checks, UI, API, and failure surface. Rank what could materially break.

02

Check what matters.

Run focused code, browser, API, and user-style checks. Capture reproducible evidence and preserve blocked or unchecked areas.

03

Revalidate the repair.

Return fix-ready findings to the coding agent, exercise the corrected behavior, and show whether the jank score actually moved.

Jank is the friction being removed.Your coding agent gets independent validation capabilities—not another generic code-review prompt.

Simple pricing

Local is fully unlocked and free.

Run every Jank workflow inside your coding agent at no charge. Pay only when you want Jank execution in a public or private cloud.

Local
$0

Every Jank validation workflow, fully unlocked on your machine.

  • All Jank commands
  • Static, browser, and user-style checks
  • Repair and revalidation loops
  • Private local reports
Request local access
Public cloud
Usage-based

Hosted Jank execution when you want more capacity without managing infrastructure.

  • No local compute required
  • Parallel hosted runs
  • Scale capacity on demand
  • Pay only for cloud usage
Request cloud access
Private cloud
Custom

Dedicated Jank execution inside your cloud or VPC.

  • Runs in your environment
  • Large-scale parallel execution
  • Private deployment controls
  • Custom security and support
Talk to us

Browser-scale experience

Built by the team that automated Chrome at scale.

The team behind Jank has been working on AI-based validation longer than anyone else. That experience turned browser behavior into repeatable evidence—and brings the same discipline into coding agents: understand the change, exercise the real product, expose friction, and verify the fix.

FAQ

The practical questions.

Jank is a local quality loop for AI-built, human-written, or mixed software. It records what it actually observed and keeps unknowns visible.

What does /jank do?

It inspects the current project and change, scores risk, chooses the smallest useful checks, exercises the software, produces fix-ready findings, and revalidates repairs. The report separates observed results from blocked, deferred, and unchecked areas.

What is free, and what costs money?

Everything Jank runs locally inside your coding agent is fully unlocked and free—including /jank, focused workflows, browser checks, repair loops, and local reports. You pay only when you choose hosted execution in a public cloud or a dedicated private-cloud deployment.

What does “jank” mean here?

Jank is the defect, friction, broken behavior, confusing interaction, unreliable state, or quality gap that should be removed. jank.ai removes jank; it does not present jank as a benefit.

Can I ask for a specific check or framework?

Yes. Add any feature, flow, check type, browser, framework, risk, persona, or constraint after /jank. Jank can work with the validation tools your coding agent can run and preserve the request as a repeatable workflow.

Does Jank modify my code automatically?

Jank first returns evidence and a scoped fix prompt. It can help the coding agent apply a repair when you ask, then rerun the relevant validation. Destructive, privileged, paid, or public actions remain under your control.

Is it private by default?

Yes. The plugin works in your local coding-agent environment and project. Your chosen coding agent, model provider, and any tools you explicitly connect still operate under their own configuration and terms.

Does a low Jank score mean everything passed?

No. The score is scoped to the evidence collected in that run. Jank keeps missing, blocked, and unmeasured coverage visible so a polished dashboard is never mistaken for proof of total quality.