Add worktree init CLI for isolated development instances

cli/src/config/env.ts

@@ -25,13 +25,17 @@ function parseEnvFile(contents: string) {
 function renderEnvFile(entries: Record<string, string>) {
   const lines = [
     "# Paperclip environment variables",
-    "# Generated by `paperclipai onboard`",
+    "# Generated by Paperclip CLI commands",
     ...Object.entries(entries).map(([key, value]) => `${key}=${value}`),
     "",
   ];
   return lines.join("\n");
 }
 
+export function resolvePaperclipEnvFile(configPath?: string): string {
+  return resolveEnvFilePath(configPath);
+}
+
 export function resolveAgentJwtEnvFile(configPath?: string): string {
   return resolveEnvFilePath(configPath);
 }
@@ -82,13 +86,33 @@ export function ensureAgentJwtSecret(configPath?: string): { secret: string; cre
 }
 
 export function writeAgentJwtEnv(secret: string, filePath = resolveEnvFilePath()): void {
+  mergePaperclipEnvEntries({ [JWT_SECRET_ENV_KEY]: secret }, filePath);
+}
+
+export function readPaperclipEnvEntries(filePath = resolveEnvFilePath()): Record<string, string> {
+  if (!fs.existsSync(filePath)) return {};
+  return parseEnvFile(fs.readFileSync(filePath, "utf-8"));
+}
+
+export function writePaperclipEnvEntries(entries: Record<string, string>, filePath = resolveEnvFilePath()): void {
   const dir = path.dirname(filePath);
   fs.mkdirSync(dir, { recursive: true });
-
-  const current = fs.existsSync(filePath) ? parseEnvFile(fs.readFileSync(filePath, "utf-8")) : {};
-  current[JWT_SECRET_ENV_KEY] = secret;
-
-  fs.writeFileSync(filePath, renderEnvFile(current), {
+  fs.writeFileSync(filePath, renderEnvFile(entries), {
     mode: 0o600,
   });
 }
+
+export function mergePaperclipEnvEntries(
+  entries: Record<string, string>,
+  filePath = resolveEnvFilePath(),
+): Record<string, string> {
+  const current = readPaperclipEnvEntries(filePath);
+  const next = {
+    ...current,
+    ...Object.fromEntries(
+      Object.entries(entries).filter(([, value]) => typeof value === "string" && value.trim().length > 0),
+    ),
+  };
+  writePaperclipEnvEntries(next, filePath);
+  return next;
+}