From a6f923514ffb3fa9a923b94f25d3e042beeba7d8 Mon Sep 17 00:00:00 2001
From: JPeetz <[email protected]>
Date: Tue, 4 Aug 2026 12:33:59 +0100
Subject: [PATCH] feat(desktop): add Gemini CLI as a tier-2 preset harness
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Adds Gemini CLI to the built-in preset harness catalog. Gemini exposes
a native ACP mode via 'gemini --acp' — no adapter needed, no vendor CLI
underlying_cli linkage required.

Ships against the existing preset infrastructure (PresetHarness struct
+ discovery/presets.rs module extracted in #3225). Zero refactor
surface — a single 9-line additive entry into PRESET_HARNESSES.

Signed-off-by: JPeetz <[email protected]>
---
 .../src-tauri/src/managed_agents/discovery/presets.rs    | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/desktop/src-tauri/src/managed_agents/discovery/presets.rs b/desktop/src-tauri/src/managed_agents/discovery/presets.rs
index bcc4288005..1766760ac6 100644
--- a/desktop/src-tauri/src/managed_agents/discovery/presets.rs
+++ b/desktop/src-tauri/src/managed_agents/discovery/presets.rs
@@ -174,6 +174,15 @@ pub(super) const PRESET_HARNESSES: &[PresetHarness] = &[
             Gateway's own environment separately.",
         underlying_cli: None,
     },
+    PresetHarness {
+        id: "gemini",
+        label: "Gemini CLI",
+        command: "gemini",
+        args: &["--acp"],
+        install_instructions_url: "https://github.com/google-gemini/gemini-cli/blob/main/docs/cli/acp-mode.md",
+        install_hint: "Buzz talks to Gemini CLI through its native ACP mode (gemini --acp).",
+        underlying_cli: None,
+    },
 ];
 
 /// Return preset definitions for the spawn/readiness registry.