fix(llxprt): remove baseurl, note manual key setup

Amolith created

llxprt doesn't support setting credentials via environment variables.
Users must run `/key {api_key}` once at the llxprt prompt.

Assisted-by: Claude Opus 4.5 via Crush

Change summary

README.md                               | 3 +++
fish/functions/_synu_agents/llxprt.fish | 3 ---
2 files changed, 3 insertions(+), 3 deletions(-)

Detailed changes

README.md 🔗

@@ -147,6 +147,9 @@ synu aider --model hf:architect/model --editor-model hf:editor/model "prompt"
 | -------------------- |
 | `hf:zai-org/GLM-4.6` |
 
+> **Note**: llxprt doesn't support setting credentials via environment
+> variables. Run `/key {your_api_key}` once at the llxprt prompt to configure.
+
 ```fish
 synu llxprt --model hf:other/model "prompt"
 ```

fish/functions/_synu_agents/llxprt.fish 🔗

@@ -40,11 +40,8 @@ function _synu_agent_llxprt_configure --description "Configure llxprt model sele
 end
 
 function _synu_agent_llxprt_args --description "Return CLI arguments to pass to llxprt"
-    # Return --provider, --baseurl, and --model flags
     echo --provider
     echo openai
-    echo --baseurl
-    echo "https://api.synthetic.new/openai/v1"
     echo --model
     echo $_synu_llxprt_selected_model
 end