refactor: replace Bun APIs with Node.js equivalents

Replace Bun.argv with process.argv, Bun.file() with fs/promises,
Bun.stringWidth with string-width package, and Bun.wrapAnsi with
wrap-ansi package for better compatibility.

bun.lock

@@ -15,7 +15,9 @@
         "happy-dom-without-node": "^14.12.3",
         "marked": "^18.0.4",
         "shiki": "^4.0.2",
+        "string-width": "^8.2.1",
         "terminal-link": "^5.0.0",
+        "wrap-ansi": "^10.0.0",
       },
       "devDependencies": {
         "@biomejs/biome": "2.4.12",
@@ -101,6 +103,8 @@
 
     "ansi-escapes": ["ansi-escapes@7.3.0", "", { "dependencies": { "environment": "^1.0.0" } }, "sha512-BvU8nYgGQBxcmMuEeUEmNTvrMVjJNSH7RgW24vXexN4Ven6qCvy4TntnvlnwnMLTVlcRQQdbRY8NKnaIoeWDNg=="],
 
+    "ansi-regex": ["ansi-regex@6.2.2", "", {}, "sha512-Bq3SmSpyFHaWjPk8If9yc6svM8c56dB5BAtW4Qbw5jHTwwXXcTLoRMkpDJp6VL0XzlWaCHTXrkFURMYmD0sLqg=="],
+
     "ansi-styles": ["ansi-styles@6.2.3", "", {}, "sha512-4Dj6M28JB+oAH8kFkTLUo+a2jwOFkuqb3yucU0CANcRRUbxS0cP0nZYCGjcc3BNXwRIsUVmDGgzawme7zvJHvg=="],
 
     "bun-types": ["bun-types@1.3.12", "", { "dependencies": { "@types/node": "*" } }, "sha512-HqOLj5PoFajAQciOMRiIZGNoKxDJSr6qigAttOX40vJuSp6DN/CxWp9s3C1Xwm4oH7ybueITwiaOcWXoYVoRkA=="],
@@ -131,6 +135,8 @@
 
     "fast-wrap-ansi": ["fast-wrap-ansi@0.2.0", "", { "dependencies": { "fast-string-width": "^3.0.2" } }, "sha512-rLV8JHxTyhVmFYhBJuMujcrHqOT2cnO5Zxj37qROj23CP39GXubJRBUFF0z8KFK77Uc0SukZUf7JZhsVEQ6n8w=="],
 
+    "get-east-asian-width": ["get-east-asian-width@1.6.0", "", {}, "sha512-QRbvDIbx6YklUe6RxeTeleMR0yv3cYH6PsPZHcnVn7xv7zO1BHN8r0XETu8n6Ye3Q+ahtSarc3WgtNWmehIBfA=="],
+
     "happy-dom-without-node": ["happy-dom-without-node@14.12.3", "", { "dependencies": { "entities": "^4.5.0", "webidl-conversions": "^7.0.0", "whatwg-mimetype": "^3.0.0", "whatwg-url": "^14.0.0" } }, "sha512-1wp8+GFneT8mBjVnzancXHRuscEUH3vnb38lfCHPxuSu6OiRw1kQzHFbTGYlNCU2YXOlVIlzsS6xg9nAr7Xg6Q=="],
 
     "has-flag": ["has-flag@5.0.1", "", {}, "sha512-CsNUt5x9LUdx6hnk/E2SZLsDyvfqANZSUq4+D3D8RzDJ2M+HDTIkF60ibS1vHaK55vzgiZw1bEPFG9yH7l33wA=="],
@@ -177,8 +183,12 @@
 
     "space-separated-tokens": ["space-separated-tokens@2.0.2", "", {}, "sha512-PEGlAwrG8yXGXRjW32fGbg66JAlOAwbObuqVoJpv/mRgoWDQfgH1wDPvtzWyUSNAXBGSk8h755YDbbcEy3SH2Q=="],
 
+    "string-width": ["string-width@8.2.1", "", { "dependencies": { "get-east-asian-width": "^1.5.0", "strip-ansi": "^7.1.2" } }, "sha512-IIaP0g3iy9Cyy18w3M9YcaDudujEAVHKt3a3QJg1+sr/oX96TbaGUubG0hJyCjCBThFH+tFpcIyoUHUn1ogaLA=="],
+
     "stringify-entities": ["stringify-entities@4.0.4", "", { "dependencies": { "character-entities-html4": "^2.0.0", "character-entities-legacy": "^3.0.0" } }, "sha512-IwfBptatlO+QCJUo19AqvrPNqlVMpW9YEL2LIVY+Rpv2qsjCGxaDLNRgeGsQWJhfItebuJhsGSLjaBbNSQ+ieg=="],
 
+    "strip-ansi": ["strip-ansi@7.2.0", "", { "dependencies": { "ansi-regex": "^6.2.2" } }, "sha512-yDPMNjp4WyfYBkHnjIRLfca1i6KMyGCtsVgoKe/z1+6vukgaENdgGBZt+ZmKPc4gavvEZ5OgHfHdrazhgNyG7w=="],
+
     "supports-color": ["supports-color@10.2.2", "", {}, "sha512-SS+jx45GF1QjgEXQx4NJZV9ImqmO2NPz5FNsIHrsDjh2YsHnawpan7SNQ1o8NuhrbHZy9AZhIoCUiCeaW/C80g=="],
 
     "supports-hyperlinks": ["supports-hyperlinks@4.4.0", "", { "dependencies": { "has-flag": "^5.0.1", "supports-color": "^10.2.2" } }, "sha512-UKbpT93hN5Nr9go5UY7bopIB9YQlMz9nm/ct4IXt/irb5YRkn9WaqrOBJGZ5Pwvsd5FQzSVeYlGdXoCAPQZrPg=="],
@@ -213,6 +223,8 @@
 
     "whatwg-url": ["whatwg-url@14.2.0", "", { "dependencies": { "tr46": "^5.1.0", "webidl-conversions": "^7.0.0" } }, "sha512-De72GdQZzNTUBBChsXueQUnPKDkg/5A5zp7pFDuQAj5UFoENpiACU0wlCvzpAGnTkj++ihpKwKyYewn/XNUbKw=="],
 
+    "wrap-ansi": ["wrap-ansi@10.0.0", "", { "dependencies": { "ansi-styles": "^6.2.3", "string-width": "^8.2.0", "strip-ansi": "^7.1.2" } }, "sha512-SGcvg80f0wUy2/fXES19feHMz8E0JoXv2uNgHOu4Dgi2OrCy1lqwFYEJz1BLbDI0exjPMe/ZdzZ/YpGECBG/aQ=="],
+
     "zod": ["zod@4.3.6", "", {}, "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg=="],
 
     "zwitch": ["zwitch@2.0.4", "", {}, "sha512-bXE4cR/kVZhKZX/RjPEflHaKVhUVl85noU3v6b8apfQEc1x4A+zBxjZ4lN8LqGd6WZ3dl98pY4o717VFmoPp+A=="],

index.ts

@@ -7,7 +7,7 @@ import { Conversation } from "./src/conversation";
 import Renderer from "./src/render";
 
 const { values: args, positionals } = parseArgs({
-  args: Bun.argv,
+  args: process.argv,
   options: {
     model: { type: "string" },
     m: { type: "string" },

package.json

@@ -37,6 +37,8 @@
     "happy-dom-without-node": "^14.12.3",
     "marked": "^18.0.4",
     "shiki": "^4.0.2",
-    "terminal-link": "^5.0.0"
+    "string-width": "^8.2.1",
+    "terminal-link": "^5.0.0",
+    "wrap-ansi": "^10.0.0"
   }
 }

src/config/index.ts

@@ -1,9 +1,10 @@
+import fs from "node:fs/promises";
 import os from "node:os";
 import { autocomplete, intro, isCancel, outro, text } from "@clack/prompts";
 import chalk from "chalk";
 
 const home = os.homedir();
-const configFile = Bun.file(`${home}/.lmc_config.json`);
+const configPath = `${home}/.lmc_config.json`;
 
 export interface AppConfig {
   baseURL: string;
@@ -36,7 +37,7 @@ export async function initConfig(old: AppConfig | null): Promise<AppConfig> {
 
   const config = { baseURL, model } satisfies AppConfig;
 
-  await configFile.write(JSON.stringify(config, null, "  "));
+  await fs.writeFile(configPath, JSON.stringify(config, null, "  "));
 
   outro(chalk.green("Configuration saved!"));
 
@@ -63,10 +64,11 @@ export async function loadConfig(
 ): Promise<AppConfig | null> {
   let config: AppConfig;
   try {
-    config = await configFile.json();
+    const text = await fs.readFile(configPath);
+    config = JSON.parse(text.toString("utf8"));
   } catch {
     if (configFlag) return null;
-    console.error(`Config not found at ${configFile.name}`);
+    console.error(`Config not found at ${configPath}`);
     return null;
   }
 

src/conversation/index.ts

@@ -1,8 +1,9 @@
+import fs from "node:fs/promises";
 import os from "node:os";
 import type { ModelMessage } from "ai";
 
 const home = os.homedir();
-const convoFile = Bun.file(`${home}/.lmc_convo.json`);
+const convoPath = `${home}/.lmc_convo.json`;
 
 export interface IConversation {
   model: string;
@@ -16,7 +17,8 @@ export class Conversation implements IConversation {
 
   async load() {
     try {
-      const convo: IConversation = await convoFile.json();
+      const text = await fs.readFile(convoPath);
+      const convo: IConversation = JSON.parse(text.toString("utf8"));
       this.model = convo.model;
       this.messages = convo.messages;
     } catch {
@@ -25,7 +27,8 @@ export class Conversation implements IConversation {
   }
 
   async save() {
-    await convoFile.write(
+    await fs.writeFile(
+      convoPath,
       JSON.stringify({
         model: this.model,
         messages: this.messages,

src/render/index.ts

@@ -8,6 +8,7 @@ import type {
 } from "ai";
 import styles from "ansi-styles";
 import { chalkStderr, supportsColorStderr } from "chalk";
+import stringWidth from "string-width";
 import { renderMarkdown } from "./markdown";
 
 export default class Renderer {
@@ -40,12 +41,11 @@ export default class Renderer {
 
   private checkContainment(text: string, pipe: WriteStream = process.stdout) {
     const [columns, rows] = pipe.getWindowSize();
-    this.charsSinceNL += Bun.stringWidth(text);
+    this.charsSinceNL += stringWidth(text);
     if (text.includes("\n")) {
       this.lineCount += text.match(/\n/g)?.length ?? 1;
       this.charsSinceNL =
-        Bun.stringWidth(text) -
+        stringWidth(text) - stringWidth(text.slice(0, text.lastIndexOf("\n")));
-        Bun.stringWidth(text.slice(0, text.lastIndexOf("\n")));
     } else if (this.charsSinceNL > columns) {
       this.lineCount++;
       this.charsSinceNL = this.charsSinceNL - columns;

src/render/markdown.ts

@@ -7,7 +7,9 @@ import {
   createHighlighter,
   type HighlighterGeneric,
 } from "shiki";
+import stringWidth from "string-width";
 import terminalLink from "terminal-link";
+import wrapAnsi from "wrap-ansi";
 import { codeToANSI } from "./codeToANSI";
 
 let highlighter: HighlighterGeneric<BundledLanguage, BundledTheme> | undefined;
@@ -15,7 +17,7 @@ let highligherLangs = "";
 
 class SWCell extends Cell {
   public override get length() {
-    return Bun.stringWidth(this.toString(), { ambiguousIsNarrow: true });
+    return stringWidth(this.toString(), { ambiguousIsNarrow: true });
   }
 }
 
@@ -23,7 +25,7 @@ class LmcRenderer extends Renderer {
   private columns: number;
 
   constructor(columns: number) {
-    super();
+    super({ gfm: true });
     this.columns = columns;
   }
 
@@ -38,7 +40,7 @@ class LmcRenderer extends Renderer {
     ];
     const color = colors[depth - 1] ?? chalk.white;
     const text = this.parser.parseInline(tokens);
-    return Bun.wrapAnsi(
+    return wrapAnsi(
       color.bold(`${"#".repeat(depth)} ${text}\n\n`),
       this.columns,
       { trim: false },
@@ -47,12 +49,12 @@ class LmcRenderer extends Renderer {
 
   override paragraph({ tokens }: Tokens.Paragraph) {
     const text = this.parser.parseInline(tokens);
-    return Bun.wrapAnsi(`${text}\n\n`, this.columns, { trim: false });
+    return wrapAnsi(`${text}\n\n`, this.columns, { trim: false });
   }
 
   override blockquote({ tokens }: Tokens.Blockquote) {
     const text = this.parser.parse(tokens).trim();
-    const lines = Bun.wrapAnsi(text, this.columns - 2, { trim: false })
+    const lines = wrapAnsi(text, this.columns - 2, { trim: false })
       .replace(/\n+/g, "\n")
       .concat("\n")
       .split("\n");
@@ -96,7 +98,7 @@ class LmcRenderer extends Renderer {
     }
 
     const cols = this.columns - 2;
-    return Bun.wrapAnsi(`${marker} ${text}`, cols, { trim: false })
+    return wrapAnsi(`${marker} ${text}`, cols, { trim: false })
       .split("\n")
       .map((line) => (line.length > 0 ? `  ${line}` : ""))
       .join("\n")