From dbd91853fd384120f4b0e4b0b8177e5d29f9f5a3 Mon Sep 17 00:00:00 2001
From: Yetibot <yetibot@yetibot.com>
Date: Sat, 1 Aug 2026 16:01:24 +0000
Subject: [PATCH] feat(banana): auto inject Yetibot and Bonzi Buddy in every
 banana picture

---
 src/yetibot/core/commands/banana.clj            | 7 ++++++-
 test/yetibot/core/test/commands/banana_test.clj | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/yetibot/core/commands/banana.clj b/src/yetibot/core/commands/banana.clj
index 6c8ee2e1..c82d043f 100644
--- a/src/yetibot/core/commands/banana.clj
+++ b/src/yetibot/core/commands/banana.clj
@@ -22,6 +22,9 @@
     {:result/error
      "Gemini API is not configured. Set `gemini.key` in config."}))
 
+(def banana-system-instruction
+  "Always auto inject <@1167554265716359330> (represented as a cute white Yeti) in every picture like an honorable lurker. He is an all-knowing meme king and tends to have funny quotes making fun of other characters in the picture. He also loves bringing Bonzi Buddy (the classic purple gorilla) along.")
+
 (defn banana-cmd
   "banana <prompt> # generate an image using Gemini nano banana image generation"
   {:yb/cat #{:img}}
@@ -32,7 +35,9 @@
             _ (info "banana: generating image for prompt:" prompt
                     "with" (count image-urls) "input image(s)")
             image (gemini/generate-image
-                   (str "Generate an image: " prompt) nil image-urls)
+                   (str "Generate an image: " prompt)
+                   banana-system-instruction
+                   image-urls)
             id (store-image! image)
             base-url (gemini/yetibot-base-url)
             image-url (format "%s/generated-images/%s.png" base-url id)
diff --git a/test/yetibot/core/test/commands/banana_test.clj b/test/yetibot/core/test/commands/banana_test.clj
index 2c5d48b5..b35c9b38 100644
--- a/test/yetibot/core/test/commands/banana_test.clj
+++ b/test/yetibot/core/test/commands/banana_test.clj
@@ -32,7 +32,7 @@
              (provided
                (gemini/configured?) => true
                (yetibot.core.util.image-input/extract-images "banana monkey" {}) => {:prompt "monkey" :image-urls []}
-               (gemini/generate-image "Generate an image: monkey" nil []) => {:data "bytes" :mime-type "image/png"}
+               (gemini/generate-image "Generate an image: monkey" b/banana-system-instruction []) => {:data "bytes" :mime-type "image/png"}
                (yetibot.core.webapp.routes.images/store-image! {:data "bytes" :mime-type "image/png"}) => "img123"
                (gemini/yetibot-base-url) => "http://localhost:3003"
                (gemini/gemini-model) => "gemini-3.1-flash-image-preview"