Usability sub-agent
User-centered design and usability specialist focused on discoverability, task clarity, responsive behavior, interaction friction, visual hierarchy, and inclusive UX.
Meet Jay. Modeled on Jason Arbon’s approach to testing: start with the customer’s intent, follow the consequential risks, challenge the evidence, and make the next useful action clear.
Jay is an AI persona inspired by Jason Arbon, not Jason himself. His visual identity is a distinctive J-shaped character, not a human portrait.
Jason’s background spans embedded systems, operating systems, search, enterprise servers, crowdsourced testing, and manual and automated testing at scale. Jay draws on the methods curated into CARBON; he did not personally hold those roles.
Coordinates specialists, presents recorded evidence, and helps the coding agent verify authorized fixes. Human judgment and existing permissions stay in control.
25 of 31 bounded checks executed: 22 passed, one failed focus-return check, one partial mobile-dialog check and one access-wording observation. Three blocked, two planned, one conditional control check not offered. Seven route identities, three viewports. Not a full product assessment.
Basis: One in-app browser session, 23 October 2026. Browser engine version unavailable. 32 public capture pairs. No real AT, full contrast/zoom, second engine, physical mobile or measured performance. Persona opinions are AI interpretations, not user research. Native run initialization was partial; this command report summarizes separate evidence.
Public signed-out https://www.xbox.com/en-US/play; no authentication, age verification, purchases, gameplay or service mutation. · partial · 2026-10-23T20:56:44Z
User-centered design and usability specialist focused on discoverability, task clarity, responsive behavior, interaction friction, visual hierarchy, and inclusive UX.
AI sub-agents identify the applied testing perspective. Findings and pass states still require the evidence shown in this report.
Targeted keyboard checks do not establish conformance
Access wording may be ambiguous
Viewport resizing does not cover device behavior
The assessment is complete. Answer now or later with /carbon-human; these questions do not block the run.
Why it matters: Data and API behavior often have business rules that look valid syntactically while being wrong operationally.
Quick choices: No additional rules; I can provide rules; Ask a domain expert; Need discovery. You can also give your own answer.
Why it matters: The code cannot determine business consequence, compensating controls, or the organization’s risk appetite.
Quick choices: Hold on failure; Canary with safeguards; Recoverable incident; Need risk owner. You can also give your own answer.
Why it matters: The project evidence does not reliably establish the release stage, deadline, or decision owner.
Quick choices: Demo; Internal trial; Staged rollout; Production release. You can also give your own answer.
Why it matters: A stated feature or workflow is not yet a decision-quality value oracle.
Quick choices: Observe a real user; Pilot outcome; Product metric; Not defined yet. You can also give your own answer.
Why it matters: Visual and interaction checks can detect defects, but product taste, trust, and workflow fit need accountable human judgment.
Quick choices: Clear enough; Reduce friction; Validate with users; Not judged yet. You can also give your own answer.
Human decision context is pending; confidence covers observed technical evidence but not unrecorded intent, risk appetite, taste, consequence, or accountability.
One in-app browser session, 23 October 2026. Browser engine version unavailable. 32 public capture pairs. No real AT, full contrast/zoom, second engine, physical mobile or measured performance. Persona opinions are AI interpretations, not user research. Native run initialization was partial; this command report summarizes separate evidence.
Run a focused follow-up inside a compatible coding agent, or copy it when the host does not support interactive report actions.
/carbon-accessibility Continue public signed-out keyboard and real assistive-technology checks with isolated browser ownership
Close highest accessibility evidence gaps
Runs only after you click. Agent approval gates still apply./carbon-more Continue saved public UI cases for physical mobile and cross-engine behavior only when isolated controls are available
Expand representative compatibility evidence safely
Runs only after you click. Agent approval gates still apply.