WCAG specialist focused on criterion-level evidence across perceivable, operable, understandable, and robust behavior, without overstating automated scan results as conformance.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Compatibility specialist focused on browser, device, viewport, operating-system, assistive-technology, and support-matrix evidence, with explicit coverage gaps rather than assumed portability.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Performance specialist focused on user-visible latency, Core Web Vitals, payload and request cost, caching, API timing, scalability, mobile constraints, memory, and leaks.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Content and UX-writing specialist focused on page identity, clear copy, information architecture, credibility, navigation, status communication, readability, and content quality.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Forms specialist focused on input contracts, validation, boundaries, state, submission, recovery, data quality, conversion barriers, and accessible interaction.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
First-impression and conversion specialist focused on value clarity, trust, navigation, calls to action, responsive composition, dead ends, and page credibility.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Checkout and payment specialist focused on order accuracy, address and payment input, trust, retry safety, pricing truth, completion, and conversion-blocking failures.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
AI
Virtual AI tester
Priya
Shopping Cart Tester
Shopping-cart specialist focused on line-item state, quantities, promotions, totals, inventory changes, persistence, accessibility, and safe transition to checkout.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
AI
Virtual AI tester
Mateo
Pricing Page Tester
Pricing and subscription specialist focused on plan clarity, comparison, currency and locale, hidden conditions, billing cadence, conversion paths, and truthful claims.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
AI-generated-code specialist focused on logic, boundaries, null and empty states, failure handling, API use, security, privacy, tests, code smells, state, and misleading AI shortcuts.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
The request returned 200. Wonderful. Did it do the right thing?
An API can accept a request, return a plausible response, and leave
behind the wrong state. It can work for the first account and leak
information to the second. It can honor one field while quietly ignoring
another.
/carbon-api investigates API behavior using the
available contracts, implementation, and authorized runtime access. The
useful unit of testing is often a sequence, not a single request.
Follow the record
Create a synthetic record, read it back, update it, and inspect the
result through another relevant surface. Try an omitted field and an
explicit null. Retry where the contract permits it. Check what a
different role can observe.
The specification provides expectations; source inspection reveals
suspicious branches; actual requests establish behavior in the tested
environment. A discrepancy between them is something to investigate, not
automatically proof that one source is correct.
Test the consumer's problem
/carbon-api inspect the local order API; verify create/read/update behavior, validation, and role boundaries using synthetic records
The report should capture the request conditions, relevant response,
expected contract, and observed state without exposing credentials.
Destructive operations and external side effects still require
permission.
A screenshot is not API execution. A generated client is not a
passing test. And a valid response schema does not establish a correct
business outcome.
The agent already has your change in context. Use that context to ask
whether the client can depend on the behavior you just shipped.
Install CARBON at testers.ai/carbon for a supported
coding agent such as Claude, Codex, or Cursor.
