accesslint-scan— agent skill

Audit a live page and report what's broken and where. Locate; don't fix. If no URL in $ARGUMENTS, ask for one.

When to Use

• A supplied page needs an automated contrast, accessible-name, or semantic-markup audit.
• You need selector-grounded findings after a UI change, without modifying the application.
• Manual assistive-technology checks or site-wide conformance assessment are separate work.

1. Audit

Use an already reviewed, project-pinned installation of @accesslint/chrome and @accesslint/cli; confirm their local binaries and CLI help before execution. Do not silently download and execute @latest. Confirm the URL and whether browser access could expose authenticated or sensitive content.

For a project whose locked installation exposes these binary names:

session_file="$(mktemp)"
./node_modules/.bin/accesslint-chrome ensure > "$session_file"

Read the complete JSON result once, record port and managed, and substitute the returned port in ./node_modules/.bin/accesslint scan "<target>" --port "<returned-port>" --format json. Never parse arbitrary stdout chunks as complete JSON. Confirm the actual binary names from the installed packages; they may differ by version. The current upstream command shape is scan <target> --port <port> --format json.

Flags as needed: --selector, --wait-for "<selector>", --include-aaa, --disable <rules>.

2. Report

Counts by impact, then one entry per violation:

• where — selector verbatim + file:line (symbol) if source is present — never fabricate. If no violation has source, note "source mapping unavailable — located by selector only".
• evidence — contrast ratio, missing attribute, empty name
• fix — mechanical change or NEEDS HUMAN

Return the worklist without editing. Remediation requires a separate authorized task; current upstream names it accesslint:accessibility-fix, which may not be installed in this host.

3. Tear down

Stop only the managed browser session created for this audit, using the installed helper's supported session/port-specific stop operation. If it only supports stop --all, check for other managed sessions first and do not terminate unrelated audits. Skip teardown of an unmanaged browser.

Gotchas

• ensure always determines the port — never hardcode 9222.
• CLI exit 2 = bad URL or page never loaded; check the dev server.

Limitations

• Automated rules cannot certify full WCAG conformance; retain human-required findings and record scan failures separately from zero violations.
• Upstream CLI shape checked against AccessLint scan source; this AAS skill does not bundle the CLI or install it.
• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.