feat: add preuninstall script to clean up agents on removal

Removes agent markdown files from ~/.config/opencode/agents/ when
the plugin is uninstalled, preventing orphaned files.

Signed-off-by: leocavalcante <[email protected]>

Author: leocavalcante

preuninstall.mjs

@@ -0,0 +1,66 @@
+#!/usr/bin/env node
+
+/**
+ * Preuninstall script for opencode-plugin-opencoder
+ *
+ * Removes agent markdown files from ~/.config/opencode/agents/
+ * This cleans up the agents when the plugin is uninstalled.
+ */
+
+import { existsSync, readdirSync, unlinkSync } from "node:fs"
+import { homedir } from "node:os"
+import { dirname, join } from "node:path"
+import { fileURLToPath } from "node:url"
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = dirname(__filename)
+
+const AGENTS_SOURCE_DIR = join(__dirname, "agents")
+const AGENTS_TARGET_DIR = join(homedir(), ".config", "opencode", "agents")
+
+function main() {
+	console.log("opencode-plugin-opencoder: Removing agents...")
+
+	// Check if target directory exists
+	if (!existsSync(AGENTS_TARGET_DIR)) {
+		console.log("  No agents directory found, nothing to remove")
+		return
+	}
+
+	// Get list of agents we installed (from source directory)
+	if (!existsSync(AGENTS_SOURCE_DIR)) {
+		console.log("  Source agents directory not found, skipping cleanup")
+		return
+	}
+
+	const agentFiles = readdirSync(AGENTS_SOURCE_DIR).filter((f) => f.endsWith(".md"))
+
+	if (agentFiles.length === 0) {
+		console.log("  No agent files to remove")
+		return
+	}
+
+	let removedCount = 0
+
+	for (const file of agentFiles) {
+		const targetPath = join(AGENTS_TARGET_DIR, file)
+
+		if (existsSync(targetPath)) {
+			try {
+				unlinkSync(targetPath)
+				console.log(`  Removed: ${file}`)
+				removedCount++
+			} catch (err) {
+				console.error(`  Warning: Could not remove ${file}: ${err.message}`)
+			}
+		}
+	}
+
+	if (removedCount > 0) {
+		console.log(`\nopencode-plugin-opencoder: Removed ${removedCount} agent(s)`)
+	} else {
+		console.log("\nopencode-plugin-opencoder: No agents were installed, nothing removed")
+	}
+}
+
+main()