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.
Clicking Submit is an action. Seeing a toast is an observation.
Neither necessarily establishes that the customer's task succeeded.
/carbon-functionality investigates what the product
does: rules, validation, state transitions, permissions, dependencies,
and recovery.
Start with an outcome
Imagine a scheduling tool. A user changes an appointment. The screen
updates immediately, but after reload the old time returns. Another
participant receives the wrong notification. A collision is allowed when
the calendar is already full.
Those failures belong to the same feature even though they appear on
different surfaces. A useful functional investigation follows the
outcome across them.
CARBON uses the available requirements and code to identify
expectations, then exercises reachable behavior with appropriate
evidence. Boundary values, invalid input, repeated actions, and
interrupted sequences belong in the plan when the feature makes them
relevant.
Tell it what must remain
true
/carbon-functionality test rescheduling in the local calendar; verify persistence, conflicts, permissions, and recovery with notifications stubbed
The agent should distinguish an actual product defect from a failed
runner, missing credential, or uncertain requirement. It should not turn
an inaccessible integration into an imagined success.
The resulting report connects each material finding to the
user-visible outcome and the steps that produced it. A repair can then
be checked against the same expectation.
This is not about maximizing the number of assertions. It is about
finding whether the feature's useful promise survives realistic use.
Install CARBON at testers.ai/carbon for a supported
coding agent such as Claude, Codex, or Cursor.
