feat: judge whether reasoning actually happened from multiple signals

reasoning_tokens=None has been carrying two meanings at once, no reasoning and no report, and the library resolved the ambiguity by quietly claiming the first. ThinkingObservation splits them: UNKNOWN says the call left no signal, ABSENT says the provider reported zero. The verdict ranks evidence by hardness. Reasoning prose is the fact itself; reasoning_tokens is a report about the fact, so a missing report cannot overrule prose that is right there. The prose check strips first, since a gateway that returns whitespace is not evidence. The enum lives in types.py, not in the new thinking.py, because LLMResponse is typed on it and the innermost layer must not import a decision module.
2026-08-25 23:40:39 -04:00
parent 85bcc23a6b
commit e90bb3d6a4
5 changed files with 141 additions and 0 deletions
@@ -81,6 +81,7 @@ layers = [
    "polygateway.config",
    "polygateway.middleware",
    "polygateway.transports | polygateway.backends | polygateway.telemetry | polygateway.structured",
+    "polygateway.thinking",
    "polygateway.providers : polygateway.sources",
    "polygateway.ports : polygateway.types : polygateway.errors : polygateway.streaming",
 ]