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.
Failure injection without modifying the original artifact.
Jason Arbon CEO, testers.ai
/carbon-failure
AIFatimaError UXAITariqPerformance
Happy-path testing tells you what works when the supporting
conditions cooperate. Customers also encounter missing files,
interrupted responses, malformed data, and dependencies that say no.
/carbon-failure explores error handling through
copy-only failure injection. The original artifacts are preserved while
the investigation uses a generated sandbox and controlled faults.
An error deserves an
expected outcome
Imagine a configuration file is missing. Should startup fail clearly,
use a documented default, or disable one feature? “It did not crash” is
not enough if the fallback quietly exposes the wrong environment.
CARBON can propose and apply relevant faults inside the authorized
sandbox: truncated input, denied test permissions, partial responses,
missing configuration, or simulated dependency loss. The next step is
observing how the product contains the failure and recovers.
The copy boundary matters, but a copied app can still call real
services. Isolation, synthetic identities, and stubs remain necessary.
Copying source is not permission to charge a card, send a message, or
mutate shared data.
Verify both sides of the
experiment
/carbon-failure make an isolated copy and test missing configuration plus malformed API responses; use local stubs and preserve the original
The report should identify the injected fault, actual behavior,
recovery expectation, evidence, and original-artifact integrity checks.
Resource failures should be modeled with limits or test doubles, not by
exhausting the user's machine.
The purpose is not to make the application fail spectacularly. It is
to discover whether it fails in a way the user can understand, contain,
and recover from.
Install CARBON at testers.ai/carbon for a supported
coding agent such as Claude, Codex, or Cursor.
