chore(lint): adopt node-lint (biome + markdownlint)

.github/workflows/ci.yml

@@ -177,7 +177,7 @@ jobs:
           #     bundler or compiler), which still cuts a release when bumped.
           # jq -S normalises key order; on any error (e.g. package.json absent
           # on one side) treat it as shipping.
-          INERT_DEVDEPS='["markdownlint-cli2"]'
+          INERT_DEVDEPS='["@biomejs/biome","markdownlint-cli2"]'
           pkg_shipping_changed() {
             local before after
             # Single quotes are deliberate: $inert/$k are jq variables, not

.markdownlint-cli2.jsonc

@@ -1,6 +1,13 @@
 {
+  // markdownlint-cli2 config — full enforcement, no rule exclusions.
+  // Full rule list: https://github.com/DavidAnson/markdownlint/blob/main/doc/Rules.md
   "config": {
-    "MD013": { "line_length": 120 }
+    "default": true,
+    // MD013: line length — ENFORCED at 100 everywhere (matches biome lineWidth)
+    "MD013": { "line_length": 100 }
+    // MD024: duplicate headings — ENFORCED (changelogs/reference docs must vary)
+    // MD041: first line must be top-level heading — ENFORCED
+    // MD060: table column style — ENFORCED
   },
-  "ignores": ["node_modules"]
+  "globs": ["**/*.md", "!node_modules/**", "!dist/**", "!.git/**"]
 }

.nvmrc

@@ -0,0 +1 @@
+24

README.md

@@ -21,6 +21,8 @@ form before the model ever sees it. This plugin wires the two together.
 - OpenCode **v2** (`opencode --version` reports 2.x).
 - `rtk` >= 0.23.0 on `PATH` — see [rtk-ai/rtk](https://github.com/rtk-ai/rtk):
   `brew install rtk`
+- Node >= 22 to run the dev tooling (`markdownlint-cli2` needs it); `.nvmrc`
+  pins 24, matching CI. The plugin itself runs on Node 18+.
 
 ## Install
 
@@ -86,7 +88,7 @@ The plugin registers one OpenCode v2 shell hook:
 ```js
 ctx.shell.hook("create.before", (event) => {
   // event.command is the command about to run; mutate it to rewrite
-})
+});
 ```
 
 For each shell command it runs `rtk rewrite <command>` and replaces the command

biome.json

@@ -0,0 +1,32 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.6.4/schema.json",
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 100,
+    "lineEnding": "lf"
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "preset": "recommended"
+    }
+  },
+  "assist": {
+    "actions": {
+      "source": {
+        "organizeImports": "on"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "double",
+      "semicolons": "always"
+    }
+  },
+  "files": {
+    "includes": ["**", "!node_modules", "!dist", "!.git", "!coverage"]
+  }
+}

index.js

@@ -44,7 +44,7 @@ function rewriteCommand(binary, command, timeoutMs) {
         (_err, stdout) => {
           const out = String(stdout ?? "").trim();
           done(out && out !== command ? out : null);
-        }
+        },
       );
     } catch {
       return done(null);

package.json

@@ -41,11 +41,13 @@
     "access": "public"
   },
   "scripts": {
-    "lint": "markdownlint-cli2 \"**/*.md\"",
+    "lint": "biome check . && markdownlint-cli2 \"**/*.md\" \"#node_modules/**\" \"#dist/**\" \"#.git/**\"",
+    "lint:fix": "biome check --write . && markdownlint-cli2 --fix \"**/*.md\" \"#node_modules/**\" \"#dist/**\" \"#.git/**\"",
     "test": "node --check index.js && node --test test/*.test.mjs",
     "check": "npm run lint && npm test"
   },
   "devDependencies": {
+    "@biomejs/biome": "^2.6.4",
     "markdownlint-cli2": "^0.24.0"
   },
   "overrides": {

test/rewrite.test.mjs

@@ -4,11 +4,11 @@
 // without rtk installed. The critical regression: `rtk rewrite` exits 3 with
 // the rewrite on stdout — the plugin must key on stdout, not exit status.
 
-import { test } from "node:test";
 import assert from "node:assert/strict";
-import { mkdtemp, writeFile, chmod } from "node:fs/promises";
+import { chmod, mkdtemp, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
+import { test } from "node:test";
 
 import plugin from "../index.js";