Module: GitFit::LLM::Template

Defined in:
lib/git_fit/llm/template.rb

Overview

{slot} renderer for prompt templates. Unknown or leftover slots fail fast — never ship a half-rendered prompt.

Defined Under Namespace

Classes: UnknownSlotError

Constant Summary collapse

SLOT_PATTERN = 
/\{\{\s*([a-zA-Z_][a-zA-Z0-9_]*)\s*\}\}/

Class Method Summary collapse

Class Method Details

.render(text, slots) ⇒ Object

Renders {slot} placeholders. Values are coerced with to_s. Raises UnknownSlotError for slots without a provided value and for slots that appear in the output after substitution (data-injected placeholders are treated as a bug, not passed through).

Raises:



24
25
26
27
28
29
30
31
32
33
34
35
 
# File 'lib/git_fit/llm/template.rb', line 24

def self.render(text, slots)
  rendered = text.gsub(SLOT_PATTERN) do
    name = Regexp.last_match(1)
    raise UnknownSlotError.new(name, slots.keys.sort) unless slots.key?(name)

    slots[name].to_s
  end
  leftover = rendered.match(SLOT_PATTERN)
  return rendered unless leftover

  raise UnknownSlotError.new(leftover[1], slots.keys.sort)
end