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 page works in the browser the agent happened to open. That is a
useful observation. It is not a compatibility matrix.
/carbon-compatibility focuses on differences across
relevant browsers, devices, input modes, operating systems,
dependencies, and older contracts.
Choose the differences that
matter
A booking form may behave correctly with a mouse on a wide screen but
become awkward with touch and a mobile keyboard. A date field may
produce a different representation in another browser. A newer client
may send a value an older server cannot understand.
CARBON uses the product and change to choose a meaningful matrix. It
can inspect responsive behavior and exercise available environments,
then associate findings with the exact conditions tested.
The word “available” matters. Resizing Chromium to a phone width is
useful layout testing. It is not evidence that the app works in Safari
on a physical iPhone. A missing browser must remain an untested
environment.
Make the request concrete
/carbon-compatibility test the booking flow across installed browsers and touch-sized layouts; distinguish emulation from real-device evidence
The report should make the differences understandable: the same task,
the tested configurations, where behavior diverged, and what to verify
after a fix.
You do not need every theoretical combination before learning
something useful. You do need to stop saying “cross-platform tested”
when the evidence is one browser at one width.
AI can reduce the effort of investigating differences. It cannot
create coverage for an environment it never exercised.
Install CARBON at testers.ai/carbon for a supported
coding agent such as Claude, Codex, or Cursor.
