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

# Gemini

> How Harmonia allocates Gemini models across transcription and bounded specialist roles.

Gemini supplies multimodal and text reasoning for most Harmonia cognitive roles. Role policy fixes the configured model, generation limits, eligible tasks, and timeout.

## How Harmonia uses it

| Work                                   | Configured model family                                    |
| -------------------------------------- | ---------------------------------------------------------- |
| Transcription and source understanding | Gemini 3.5 Flash, including authorized multimodal evidence |
| Ryan strategy                          | Gemini 3.5 Flash                                           |
| Dara editorial assessment              | Gemini 3.5 Flash                                           |
| Maya presentation planning             | Gemini 3.5 Flash                                           |
| Nova read-only liaison                 | Gemini 3.5 Flash                                           |
| Coordinator and Temi planning          | Gemini 3.5 Flash-Lite                                      |

Inputs are typed and bounded. Source-derived claims must retain supplied evidence references. The application reserves budget before invocation, records normalized usage, and validates output before advancing a stage.

## Security and authority

Gemini cannot approve strategies or effects, mutate Firestore, schedule externally, publish, or create verification receipts. Multimodal input is attached only from an authorized source package.

## Failure behavior

Unavailable configured models fail visibly. Output that violates a schema, evidence boundary, or role boundary is rejected as a protocol failure.

## Evidence status

Model routing and output contracts are locally tested. Authenticated Gemini calls and their billed usage require captured provider and Cloud Trace evidence.

## Relevant files

* `agent/harmonia_agent/role_models.py`
* `agent/harmonia_agent/model_governance.py`
* `agent/harmonia_agent/model_catalog.py`
* `agent/harmonia_agent/content.py`
* `agent/harmonia_agent/agents.py`
* `docs/models-cost-evaluation.mdx`