fix: generate .ts from .md at build time for bundler compatibility

Fixes issue where readFileSync with __dirname fails when bundled by Bun
(same issue as #222, reintroduced by #327).

- Add scripts/generate-prompts.ts prebuild script
- Import generated .ts files instead of runtime readFileSync
- Remove postbuild .md copy (no longer needed)

Author: Tarquinen

.gitignore

@@ -28,6 +28,9 @@ Thumbs.db
 # OpenCode
 .opencode/
 
+# Generated prompt files (from scripts/generate-prompts.ts)
+lib/prompts/*.generated.ts
+
 # Tests (local development only)
 tests/
 notes/

lib/prompts/index.ts

@@ -1,17 +1,11 @@
-import { readFileSync } from "node:fs"
-import { dirname, join } from "node:path"
-import { fileURLToPath } from "node:url"
-
 // Tool specs
 import { PRUNE_TOOL_SPEC } from "./prune-tool-spec"
 import { DISTILL_TOOL_SPEC } from "./distill-tool-spec"
 import { COMPRESS_TOOL_SPEC } from "./compress-tool-spec"
 
-const __dirname = dirname(fileURLToPath(import.meta.url))
-
-// Load markdown prompts at module init
-const SYSTEM_PROMPT = readFileSync(join(__dirname, "system.md"), "utf-8")
-const NUDGE = readFileSync(join(__dirname, "nudge.md"), "utf-8")
+// Generated prompts (from .md files via scripts/generate-prompts.ts)
+import { SYSTEM as SYSTEM_PROMPT } from "./system.generated"
+import { NUDGE } from "./nudge.generated"
 
 export interface ToolFlags {
     prune: boolean

package.json

@@ -8,8 +8,9 @@
     "types": "./dist/index.d.ts",
     "scripts": {
         "clean": "rm -rf dist",
+        "generate:prompts": "tsx scripts/generate-prompts.ts",
+        "prebuild": "npm run generate:prompts",
         "build": "npm run clean && tsc",
-        "postbuild": "rm -rf dist/logs && cp lib/prompts/*.md dist/lib/prompts/",
         "prepublishOnly": "npm run build",
         "dev": "opencode plugin dev",
         "typecheck": "tsc --noEmit",

scripts/generate-prompts.ts

@@ -0,0 +1,44 @@
+#!/usr/bin/env tsx
+/**
+ * Prebuild script that generates TypeScript files from Markdown prompts.
+ *
+ * This solves the issue where readFileSync with __dirname fails when the
+ * package is bundled by Bun (see issue #222, PR #272, #327).
+ *
+ * The .md files are kept for convenient editing, and this script generates
+ * .ts files with exported string constants that bundle correctly.
+ */
+
+import { readFileSync, writeFileSync, readdirSync } from "node:fs"
+import { dirname, join, basename } from "node:path"
+import { fileURLToPath } from "node:url"
+
+const __dirname = dirname(fileURLToPath(import.meta.url))
+const PROMPTS_DIR = join(__dirname, "..", "lib", "prompts")
+
+// Find all .md files in the prompts directory
+const mdFiles = readdirSync(PROMPTS_DIR).filter((f) => f.endsWith(".md"))
+
+for (const mdFile of mdFiles) {
+    const mdPath = join(PROMPTS_DIR, mdFile)
+    const baseName = basename(mdFile, ".md")
+    const constName = baseName.toUpperCase().replace(/-/g, "_")
+    const tsPath = join(PROMPTS_DIR, `${baseName}.generated.ts`)
+
+    const content = readFileSync(mdPath, "utf-8")
+
+    // Escape backticks and ${} template expressions for safe embedding in template literal
+    const escaped = content.replace(/\\/g, "\\\\").replace(/`/g, "\\`").replace(/\$\{/g, "\\${")
+
+    const tsContent = `// AUTO-GENERATED FILE - DO NOT EDIT
+// Generated from ${mdFile} by scripts/generate-prompts.ts
+// To modify, edit ${mdFile} and run \`npm run generate:prompts\`
+
+export const ${constName} = \`${escaped}\`
+`
+
+    writeFileSync(tsPath, tsContent)
+    console.log(`Generated: ${baseName}.generated.ts`)
+}
+
+console.log(`Done! Generated ${mdFiles.length} TypeScript file(s) from Markdown prompts.`)