No A11y Regression

---
name: no-a11y-regression
description: "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."
metadata:
  chock.artifact: rule
  chock.enforcement: block
  chock.coverage_without_chock: advisory
---

# No Accessibility Regression Rule

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.

```
never(break): name|lang an element already had -- remove, empty(alt=""), aria-hidden, role=presentation|none; never(resolve_violation_by): delete(element)
on(name_added): record, never_ask; alt="" asserts decorative and only its author may retract a description; present -> present (reworded label) is a copy decision, stay silent
```

This skill is advisory: the client reading it has no mechanism to enforce it, and this policy stays advisory even when compiled by `chock` -- it ships rule text, not a blocking hook. See https://github.com/open-coder-ai/chock