docs(harness): enforce bilingual docs

.atl/AGENTS.md

@@ -62,6 +62,7 @@ Components live in `src/components/{atoms|molecules|organisms}/{kebab-name}/` wi
 - For package-facing changes (package output, exports, generated declarations, peer ranges, React major upgrades, or CI/package distribution policy), require `pnpm run build`; require `pnpm run verify:package` when published output or consumer compatibility can change. Tests/Storybook alone are not enough for React major upgrades.
 - Generated declarations must not leak internal path aliases or CSS side-effect imports into the published `.d.ts` output
 - English only — code, comments, stories
+- Paired repository docs are bilingual: base `*.md` files are Spanish and matching `*.en.md` files are English. When editing docs under `docs/` or root README files, preserve that split, update both language variants when the content changes, and never replace the Spanish base file with English prose.
 - Commit messages must follow the commitlint-enforced Conventional Commit format: `<type>(<optional scope>): <description>`. PR titles should follow the same format for review consistency. Allowed types: `build`, `chore`, `ci`, `docs`, `feat`, `fix`, `perf`, `refactor`, `revert`, `style`, `test`. Use scopes for domains such as `a11y`, `tokens`, or `infra` instead of inventing custom types.
 
 ---

.atl/skills/pr-reviewer/SKILL.md

@@ -38,6 +38,7 @@ Run first. If any check fails, return **REJECTED** and do not continue to option
 | Linked issue assigned to someone else without permission evidence | Fetch linked issue assignees; if any assignee is not the contributor/user, require explicit reassignment/takeover permission before review proceeds. |
 | Invalid PR title | Conventional Commit format: `<type>(<optional scope>): <description>`. |
 | PR template incomplete | No required placeholder sections left empty. |
+| Paired docs language split broken | For root/docs `*.md` + `*.en.md` pairs, base `*.md` must remain Spanish and matching `*.en.md` must remain English unless maintainers explicitly approve a language migration. |
 | Branch/diff scope unclear | Diff contains unrelated work without an explicit explanation. |
 | Component audit missing for component changes | Run or cite `components-auditor`; CRITICAL/MAJOR findings block PR. |
 | Storybook conventions contradicted | Use `component-contributor/references/stories.md` as source of truth; reject drift such as `parameters.docs.description.component`. |
@@ -56,6 +57,7 @@ Run after automatic rejection checks pass.
 - [ ] Generated/build/runtime artifacts are absent.
 - [ ] Review workload is reasonable; if over 400 changed lines, use chained PR strategy or record maintainer exception.
 - [ ] Public API changes are intentional and documented.
+- [ ] Paired docs keep the repository language split: Spanish in base `*.md`, English in matching `*.en.md`.
 
 ### 2 — Component quality evidence