feat: add --char CLI argument for character selection

- Pre-parse --char before config import via argparse
- Falls back to config.yaml agent.character if not provided
- Replaces manual sys.argv parsing with proper argparse
- Retains existing -w/--workspace argument

hendrik.py

@@ -1,4 +1,14 @@
-import os, sys, threading, time, signal
+import os, sys
+import argparse
+
+# Pre-parse --char BEFORE config import (config reads os.environ at import time)
+_pre = argparse.ArgumentParser(add_help=False)
+_pre.add_argument('--char', type=str, default=None)
+_pre_args, _ = _pre.parse_known_args()
+if _pre_args.char:
+    os.environ['AGENT_CHARACTER'] = _pre_args.char
+
+import threading, time, signal
 
 import config
 
@@ -58,23 +68,20 @@ TOOLS          = gadget.tool_schemas   (tools_definition)
 TOOL_HANDLERS  = gadget.tool_handlers  (tools_definition)
 
 def main():
-    llm_client = LLMClient(config.llm_baseurl, config.llm_model, config.llm_api_key, config.llm_timeout)
+    parser = argparse.ArgumentParser(description="Hendrik AI Agent")
+    parser.add_argument('--char', type=str, default=None, help='Character name (overrides config.yaml)')
+    parser.add_argument('-w', '--workspace', type=str, default=None, help='Working directory')
+    args = parser.parse_args()
 
-    workspace  = None
-    i          = 1
-    while i < len(sys.argv):
-        if sys.argv[i] in ('-w', '--workspace') and i + 1 < len(sys.argv):
-            workspace = sys.argv[i + 1]
-            i += 2
-        else:
-            i += 1
-    if workspace:
-        resolved = os.path.abspath(workspace)
+    if args.workspace:
+        resolved = os.path.abspath(args.workspace)
         if not os.path.isdir(resolved):
             print(f"Error: '{resolved}' is not a valid directory", flush=True)
             sys.exit(1)
         os.chdir(resolved)
 
+    llm_client = LLMClient(config.llm_baseurl, config.llm_model, config.llm_api_key, config.llm_timeout)
+
     services = []
 
     if config.XMPP_ENABLED: