[dmmulroy]

Summary

Ship anti-slop/require-readable-spacing as an opinionated, whitespace-autofixable generic rule. Agents increasingly remove structural blank lines; a formatter preserves that condensed layout rather than restoring readability.

• Vendor ESLint Stylistic's padding-line-between-statements engine and option types from 435c3ea0fd26a5fef9042c4b36b6e165fbbf8d08.
• Retain the MIT license (OpenJS Foundation and ESLint Stylistic notices), exact provenance, and a list of local adaptations.
• Adapt the required helper/type surface to Oxlint; no Stylistic, ESLint, TypeScript-ESLint, or additional parser runtime dependency.
• Add a thin, no-options anti-slop policy: blank lines between top-level declarations, around multiline bindings, before returns/control flow, and after blocks. Keep short local bindings, consecutive imports, and overload groups compact; preserve documentation attachment and existing blank lines.
• Enable the rule in installation guidance, sync the distributed assets, and extend asset drift checking to cover licenses/provenance as well as TypeScript.

The vendored engine + helper/type surface is 1,044 lines; the policy wrapper is 47 lines. The duplicate in skill assets is generated distribution, not a second implementation owner.

Verification

• pnpm check passed: root lint, all RuleTester suites, native CLI integration, typecheck, and skill-asset parity.
• New exact-output cases cover comments/JSDoc, same-line statements, imports, TypeScript declarations and overloads, Effect-style generators, semicolon-free code, and upstream padding removal.
• Native CLI integration exercises the exported plugin on multiple files, rejection, autofix, and repeated-fix stability.
• Consumer verification in cf-twitch on Oxlint 1.80.0 passed root enforcement and lint/Oxfmt convergence, strict typechecking, unit tests, and all three local workerd journeys. Upstream checks use the existing pinned Oxlint 1.78.0.
• git diff --check passed.

Boundaries

This is structural spacing, not inference of every logical group. It does not add braces, wrap expressions, sort imports, or enable a competing formatter preset. The complete upstream JS/TS test suites are not ported; focused Oxlint compatibility tests and native CLI evidence are included instead. Upstream non-null assumptions remain localized in vendored source; indexed reads have explicit guards for consumers using noUncheckedIndexedAccess.