Strip code fences from markdown rendering in terminal output

src/markdown.ts

@@ -1,7 +1,10 @@
 export function renderMarkdown(text: string): string {
+  // Strip code fences (``` and ```language) — we're already in a terminal
+  let result = text.replace(/^```\w*\n?/gm, "")
+
   // Extract code spans first so their contents aren't processed as bold/italic
   const codeSpans: string[] = []
-  let result = text.replace(/`([^`]+)`/g, (_, code) => {
+  result = result.replace(/`([^`]+)`/g, (_, code) => {
     codeSpans.push(code)
     return `\x00CODE${codeSpans.length - 1}\x00`
   })

src/test-markdown.ts

@@ -16,3 +16,19 @@ for (const line of lines) {
   console.log(`  ${renderMarkdown(line)}`)
   console.log()
 }
+
+// Code fence tests
+console.log("--- Code fence tests ---")
+const fenceTests = [
+  "Here is some code:\n```typescript\nconst x = 1\n```\nDone.",
+  "```\nhello\n```",
+  "```js\nconsole.log('hi')\n```",
+]
+
+for (const test of fenceTests) {
+  console.log("INPUT:")
+  console.log(test)
+  console.log("OUTPUT:")
+  console.log(renderMarkdown(test))
+  console.log()
+}