feat: make reaction emojis configurable via environment variables (#8)

Add REACTION_PROCESSING and REACTION_COMPLETED environment variables
to allow customizing the emoji reactions for processing and completion.
Defaults to "eyes" and "white_check_mark" respectively.

https://claude.ai/code/session_0161Zkff8QojLyz6G43hvQjL

Co-authored-by: Claude <noreply@anthropic.com>

Author: danishi

.env.example

@@ -6,3 +6,5 @@ GOOGLE_CLOUD_PROJECT="your-gcp-project"
 GOOGLE_CLOUD_LOCATION="global"
 CLOUD_RUN_LOCATION="asia-northeast1"
 MODEL_NAME="gemini-3.1-pro-preview"
+REACTION_PROCESSING="eyes"
+REACTION_COMPLETED="white_check_mark"

app/main.py

@@ -26,6 +26,8 @@
 MODEL_NAME = os.environ.get("MODEL_NAME", "gemini-3.1-pro-preview")
 ALLOWED_SLACK_WORKSPACE = os.environ.get("ALLOWED_SLACK_WORKSPACE")
 APP_NAME = os.environ.get("APP_NAME", "slack-bot")
+REACTION_PROCESSING = os.environ.get("REACTION_PROCESSING", "eyes")
+REACTION_COMPLETED = os.environ.get("REACTION_COMPLETED", "white_check_mark")
 
 # Initialize Slack Bolt AsyncApp
 bolt_app = AsyncApp(token=SLACK_BOT_TOKEN, signing_secret=SLACK_SIGNING_SECRET)
@@ -201,7 +203,7 @@ async def handle_mention(body, say, client, logger, ack):
 
     # Add 👀 reaction to indicate the message is being processed
     try:
-        await client.reactions_add(channel=channel, timestamp=message_ts, name="eyes")
+        await client.reactions_add(channel=channel, timestamp=message_ts, name=REACTION_PROCESSING)
     except Exception:
         pass
 
@@ -254,7 +256,7 @@ async def handle_mention(body, say, client, logger, ack):
 
     # Add ✅ reaction to indicate the reply is complete
     try:
-        await client.reactions_add(channel=channel, timestamp=message_ts, name="white_check_mark")
+        await client.reactions_add(channel=channel, timestamp=message_ts, name=REACTION_COMPLETED)
     except Exception:
         pass
 

scripts/deploy.sh

@@ -65,7 +65,7 @@ SERVICE_URL=$(gcloud run deploy "${SERVICE_NAME}" \
   --allow-unauthenticated \
   --no-cpu-throttling  \
   --project "${PROJECT_ID}" \
-  --set-env-vars "SLACK_BOT_TOKEN=${SLACK_BOT_TOKEN},SLACK_SIGNING_SECRET=${SLACK_SIGNING_SECRET},GOOGLE_GENAI_USE_VERTEXAI=${GOOGLE_GENAI_USE_VERTEXAI},GOOGLE_CLOUD_PROJECT=${PROJECT_ID},GOOGLE_CLOUD_LOCATION=global,ALLOWED_SLACK_WORKSPACE=${ALLOWED_SLACK_WORKSPACE:-},MODEL_NAME=${MODEL_NAME:-gemini-3.1-pro-preview}" \
+  --set-env-vars "SLACK_BOT_TOKEN=${SLACK_BOT_TOKEN},SLACK_SIGNING_SECRET=${SLACK_SIGNING_SECRET},GOOGLE_GENAI_USE_VERTEXAI=${GOOGLE_GENAI_USE_VERTEXAI},GOOGLE_CLOUD_PROJECT=${PROJECT_ID},GOOGLE_CLOUD_LOCATION=global,ALLOWED_SLACK_WORKSPACE=${ALLOWED_SLACK_WORKSPACE:-},MODEL_NAME=${MODEL_NAME:-gemini-3.1-pro-preview},REACTION_PROCESSING=${REACTION_PROCESSING:-},REACTION_COMPLETED=${REACTION_COMPLETED:-}" \
   --format 'value(status.url)')
 
 echo "--------------------------------------------"