# Keep Accessibility From Regressing

Keep Accessibility From Regressing: what it does, its label on each agent, what it misses, and examples.

Catalog policy no-a11y-regression, version 1.1.3, labelled blocks on Claude Code.

> Ask the user before running any command on this page: each one changes how their agent or repository behaves.

## What it does

Trigger: remediating accessibility, editing markup, emptying or removing an alt, aria-label, label or lang that an element already had, deleting a flagged element. avoid: breaking a requirement the previous revision met; interrupting a correct fix.

## On each agent

| Agent | Label | What it does there |
| --- | --- | --- |
| Claude Code | Blocks | Blocks on an agent's file writes and at turn end |
| Cursor | Blocks | Blocks on an agent's file writes and at turn end |
| Codex | Blocks | Blocks on an agent's file writes and at turn end. If the hook errors, the action goes through (not witnessed; the vendor's row is only partly live-run) |
| GitHub Copilot | Blocks | Blocks at turn end only. It does not check a file write when it happens. If the hook errors, the action goes through (not witnessed; the vendor's row is only partly live-run) |
| Devin | Blocks | Blocks at turn end only. It does not check a file write when it happens. If the hook errors, the action goes through (vendor docs only, not witnessed) |
| Grok | Not graded | Not graded yet for Grok |
| goose | Not graded | Not graded yet for goose |
| Antigravity | Not graded | Not graded yet for Antigravity |
| OpenHands | Not graded | Not graded yet for OpenHands |
| Kimi Code | Not graded | Not graded yet for Kimi Code |
| Factory Droid | Not graded | Not graded yet for Factory Droid |

## What it misses

This policy does not state what it misses.

## Examples from its eval suite

Refused: At write time the agent rewrites a page so an image that carried alt text now has alt="".

Allowed: At write time the agent rewords an image's alt text.

## More

- [The policy on the catalog pages](https://chock.sh/coding/policies/no-a11y-regression/)
- [Source at the pinned catalog commit](https://github.com/open-coder-ai/chock-catalog/tree/1e60d211c1bb767152c6ab0167932da06ab3a10f/base/no-a11y-regression)


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Built from engine [5a4b6287a46e](https://github.com/open-coder-ai/chock/commit/5a4b6287a46e07f9f856d9bbe10622bd1ff2e021) and catalog [1e60d211c1bb](https://github.com/open-coder-ai/chock-catalog/commit/1e60d211c1bb767152c6ab0167932da06ab3a10f).