> ## Documentation Index
> Fetch the complete documentation index at: https://docs.osschat.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Web Search and Reasoning

> Optional tool use and model reasoning behavior in OpenChat streams.

# Web Search and Reasoning

OpenChat can augment responses with controlled web search and model reasoning traces.

## Web Search

* Toggle from chat prompt toolbar.
* Availability is checked per deployment and per-user quota.
* Daily search limit is enforced in Convex (`search.ts`).
* Search tool usage is tracked on message/job metadata.

If search is requested but unavailable, OpenChat records explicit unavailable state and continues with non-search generation.

## Reasoning

* Reasoning-enabled models stream reasoning parts separately from answer text.
* Chain-of-thought style parts are normalized and persisted as structured items.
* Reasoning metadata includes requested flag, token count, and duration.

## Stream Metadata

Streaming pipeline tracks:

* time to first token
* tokens per second
* total duration
* tool call count
* web search call count

This metadata powers UI analytics and post-hoc performance tuning.