anti-slop: Opinionated Oxlint rules

Opinionated Oxlint rules that reject low-evidence and low-signal TypeScript and JavaScript patterns.

The plugin is source-distributed for now. An npm release is planned; until then, use the bundled agent skill to copy and configure it in another repository.

npx skills add dmmulroy/anti-slop --skill install-anti-slop

Then ask your coding agent to install or configure anti-slop in the current repository. The skill copies the plugin, installs current Oxlint dependencies, merges the plugin into the existing lint configuration, enables every rule, and validates the result.

To inspect available skills first:

npx skills add dmmulroy/anti-slop --list

Copy src/

into the target repository, for example at tools/oxlint/anti-slop/

, and install matching current versions of oxlint

and @oxlint/plugins

.

Register the copied entry point in oxlint.config.ts

:

import { defineConfig } from "oxlint";

export default defineConfig({
  jsPlugins: [
    { name: "anti-slop", specifier: "./tools/oxlint/anti-slop/index.ts" },
  ],
  rules: {
    "anti-slop/no-chained-type-assertions": "error",
    "anti-slop/no-conditional-empty-object-spread": "error",
    "anti-slop/no-known-value-widening": "error",
    "anti-slop/no-object-parameters": "error",
    "anti-slop/no-runtime-typeof": "error",
    "anti-slop/no-shape-in-symbol-names": "error",
    "anti-slop/no-unknown-parameters": "error",
    "anti-slop/no-unknown-type-aliases": "error",
    "anti-slop/no-unsafe-dictionary-type": "error",
    "anti-slop/no-widen-then-assert": "error"
  }
});

The same jsPlugins

entry and rules work under lint

in a Vite+ config.

no-chained-type-assertions

— rejects nested type assertions that fabricate evidence.no-conditional-empty-object-spread

— rejects conditional spreads that use{}

to omit fields.no-known-value-widening

— rejects explicit broad target types that discard known value evidence.no-object-parameters

— rejects the broadobject

type on function inputs.no-runtime-typeof

— requires boundary parsing instead of ad hoctypeof

narrowing.no-shape-in-symbol-names

— rejectsshape

in symbol names.no-unknown-parameters

— rejectsunknown

inputs except the explicitcause

convention.no-unknown-type-aliases

— rejects aliases that merely concealunknown

.no-unsafe-dictionary-type

— rejects dictionary value contracts based onunknown

,any

,object

,{}

, and semantic equivalents.no-widen-then-assert

— rejects local flows that widen known values and later assert them back.

pnpm install
pnpm check

src/

is canonical. After changing production source, run pnpm sync:skill-assets

; CI checks that the skill's bundled copy remains identical.

MIT