[BUG] acts_as_tool_call ignores message: option - hardcodes .message in cleanup_orphaned_tool_results

[saurabh-sikchi]

Basic checks

• I searched existing issues - this hasn't been reported
• I can reproduce this consistently
• This is a RubyLLM bug, not my application code

What's broken?

When using acts_as_tool_call message: :llm_message to configure a custom association name, the cleanup_orphaned_tool_results method in chat_methods.rb ignores this configuration and calls .message directly, causing NoMethodError.

How to reproduce

1. Configure a custom message association name:

class LLMToolCall < ApplicationRecord
  acts_as_tool_call message: :llm_message
end

2. Run a chat with tool calls that triggers cleanup_orphaned_tool_results
3. Error occurs at line 221 in lib/ruby_llm/active_record/chat_methods.rb

Expected behavior

The gem should use the configured association name (:llm_message) instead of hardcoded .message

What actually happened

NoMethodError: undefined method 'message' for an instance of LLMToolCall

The offending code at lib/ruby_llm/active_record/chat_methods.rb:221:
tool_call_message = last.parent_tool_call.message

Environment

• Ruby: 3.4.7
• ruby_llm: 1.9.1