refactor: clean up code formatting and update package dependencies

- Removed unnecessary blank lines and improved formatting for better readability in index.ts and converters.ts.
- Updated package-lock.json to downgrade several dependencies for compatibility, including @protobufjs/eventemitter, @protobufjs/fetch, and others.
- Enhanced error message in core.ts to clarify configuration options for the Command Code API key.
- Added a test to ensure the correct handling of environment variable values in test-stream.ts.

src/converters.ts

@@ -39,7 +39,11 @@ export function numberValue(value: unknown): number | undefined {
 }
 
 function defaultAuthPaths(home: string): string[] {
-  return [join(home, ".commandcode", "auth.json"), join(home, ".omp", "agent", "auth.json"), join(home, ".pi", "agent", "auth.json")]
+  return [
+    join(home, ".commandcode", "auth.json"),
+    join(home, ".omp", "agent", "auth.json"),
+    join(home, ".pi", "agent", "auth.json"),
+  ]
 }
 
 function apiKeyFromCredentialRecord(value: unknown): string | undefined {
@@ -288,7 +292,11 @@ export function mapFinishReason(reason: unknown): StopReason {
 function promptPartToText(value: unknown, depth = 0): string {
   if (depth > 10) return ""
   if (typeof value === "string") return value
-  if (Array.isArray(value)) return value.map((v) => promptPartToText(v, depth + 1)).filter(Boolean).join("\n")
+  if (Array.isArray(value))
+    return value
+      .map((v) => promptPartToText(v, depth + 1))
+      .filter(Boolean)
+      .join("\n")
   if (!isRecord(value)) return ""
   const text = stringValue(value.text)
   if (text) return text
@@ -300,7 +308,10 @@ function promptPartToText(value: unknown, depth = 0): string {
 export function systemPromptToText(value: unknown): string {
   if (value === undefined || value === null) return ""
   if (typeof value === "string") return value
-  if (Array.isArray(value)) return value.map((v) => promptPartToText(v, 0)).filter(Boolean).join("\n\n")
+  if (Array.isArray(value))
+    return value
+      .map((v) => promptPartToText(v, 0))
+      .filter(Boolean)
+      .join("\n\n")
   return promptPartToText(value, 0)
 }
-