fix: map float type to number in RubyLlmBuilder

[sh1nj1]

Problem

AI agents using tools with Float parameters (like progress in creative_create_service) fail with:

AI Error: undefined method 'float' for class #<Class:0x...>

Root Cause

RubyLlmBuilder maps :float type to :float, but RubyLLM's params DSL only has number method, not float.

Solution

• scalar_method(:float) now returns :number
• scalar_symbol(:float) now returns :number

Changes

• app/lib/tool_schema/ruby_llm_builder.rb: Fix float → number mapping
• test/tool_schema_test.rb: Add tests for float type handling

Testing

All 23 tests pass, including 2 new tests for float type.

[sh1nj1]

Evidence: RubyLLM uses number, not float

1. RubyLLM Schema DSL - PrimitiveTypes

lib/ruby_llm/schema/dsl/primitive_types.rb

def string(name, description: nil, required: true, **options)
def number(name, description: nil, required: true, **options)  # ← number, not float!
def integer(name, description: nil, required: true, **options)
def boolean(name, description: nil, required: true, **options)
def null(name, description: nil, required: true, **options)

No float method defined. Only number.

2. RubyLLM Schema - respond_to_missing?

lib/ruby_llm/schema.rb

def respond_to_missing?(method_name, include_private = false)
  %i[string number integer boolean array object any_of one_of null].include?(method_name) || super
end

float is not in the list. Only number.

3. RubyLLM Tool - map_type

lib/ruby_llm/tool.rb

def self.map_type(type)
  case type.to_s
  when 'integer', 'int' then 'integer'
  when 'number', 'float', 'double' then 'number'  # float → number
  when 'boolean' then 'boolean'
  # ...
  end
end

This also confirms that RubyLLM maps float to number internally.

Conclusion

RubyLLM follows JSON Schema standard which uses number type (not float). The fix in this PR correctly maps :float to :number in both scalar_method and scalar_symbol.