Class: Insika::ModelResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/insika/model_resolver.rb

Overview

LLM config v2 resolution (FOLLOWUP §10). Turns the three config layers into a single ModelSelection at turn start:

Chat (per-session pin) > Agent (profile.model) > Platform default (Settings)

Also enforces the agent's model_policy on the RESOLVED model (a chat pin can never escape the fence) and resolves the fallback chain + selection source.

Pure: no ruby_llm, no store writes. settings_store is optional — nil means "no platform layer" (an agent WITHOUT a model then fails high), preserving the pre-v2 behavior for the many call sites that build an Executor without one.

Constant Summary collapse

SESSION_SLOT =

Reserved, collision-safe slot for the per-session model pin inside session.vars (namespaced so it never renders in <request_context> — the Request provider skips "__"-prefixed vars).

"__llm__"

Instance Method Summary collapse

Constructor Details

#initialize(settings_store: nil) ⇒ ModelResolver

Returns a new instance of ModelResolver.



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# File 'lib/insika/model_resolver.rb', line 21

def initialize(settings_store: nil)
  @settings_store = settings_store
end

Instance Method Details

#resolve(profile:, session: nil) ⇒ Object

profile: AgentProfile; session: SessionStore::Session | nil. -> ModelSelection. Raises PolicyDenied (model outside the agent's fence) or Error (no model resolvable at any layer).



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# File 'lib/insika/model_resolver.rb', line 33

def resolve(profile:, session: nil)
  settings = platform_settings
  choice = pick(profile, session, settings)

  if blank?(choice.model)
    raise Insika::Error,
          "no model resolved for agent '#{profile.id}': set the agent model or a platform default_model (Settings)"
  end

  provider = choice.provider&.to_sym
  enforce_policy!(profile, choice.model, provider)

  ModelSelection.new(
    model: choice.model, provider: provider, source: choice.source, pinned: choice.pinned,
    params: resolve_params(profile, session, settings, choice.model, provider),
    fallbacks: choice.pinned ? [] : resolve_fallbacks(profile, settings, choice.model, provider)
  )
end