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

# Use Nika with Gemini CLI

> Add the read-only Nika oracle to Gemini CLI's settings.json — the exact stanza today, one wire command in the next release.

[Gemini CLI](https://github.com/google-gemini/gemini-cli) reads MCP servers
from `mcpServers` in its user-scope `~/.gemini/settings.json`. The binary
comes first: `brew install supernovae-st/tap/nika`
([other paths](/getting-started/installation)).

Add the `nika` entry to `~/.gemini/settings.json`:

```json theme={"system"}
{ "mcpServers": { "nika": { "command": "nika", "args": ["mcp"] } } }
```

`nika wire gemini` ships in the next release and writes exactly this —
it touches only the `mcpServers` key, so every other setting in the shared
file survives, and re-running prints `· current` (idempotent).

<Note>
  Gemini CLI's policy parser splits server names on underscores — a server
  named `my_server` misbehaves upstream. `nika` is underscore-free, safe
  as-is.
</Note>

## The repo side

`nika init` writes the agent-teaching surface (`AGENTS.md`, rules) plus
the `$schema` modeline for validation and completion on `*.nika.yaml`.

## Verify

`/mcp` in a Gemini CLI session lists `nika` with the eight `nika_*` tools
([the oracle's contract](/reference/mcp-server): validate, explain, schema,
cost — no execution). Then prove the loop end-to-end:
[integrate in 10 minutes](/integrations/quickstart).