Using Gemini v2.5 free tier

.claude/settings.local.json

@@ -1,12 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "Bash(tree:*)",
-      "Bash(mvn clean compile:*)",
-      "WebFetch(domain:github.com)",
-      "Bash(rm:*)"
-    ],
-    "deny": [],
-    "ask": []
-  }
-}

.gitignore

@@ -45,3 +45,4 @@ tweetbot.log
 # Java
 hs_err_pid*
 replay_pid*
+/.claude/

README.md

@@ -4,7 +4,7 @@ An automated Twitter bot that generates and posts tweets using Google Gemini's f
 
 ## Features
 
-- Generate tweet content using Google Gemini (gemini-2.0-flash-exp) - **Free Tier**
+- Generate tweet content using Google Gemini (gemini-2.5-flash) - **Free Tier**
 - **Three operation modes:**
   - Interactive mode with manual approval
   - Auto-post mode for one-time tweets
@@ -35,10 +35,10 @@ An automated Twitter bot that generates and posts tweets using Google Gemini's f
 4. Select or create a Google Cloud project
 5. Copy the API key and save it securely
 
-**Note:** The free tier of Google Gemini includes:
+**Note:** The free tier of Gemini 2.5 Flash includes:
-- 15 requests per minute
+- 10 requests per minute
-- 1 million tokens per minute
+- 250,000 tokens per minute
-- 1,500 requests per day
+- 250 requests per day
 - More than enough for a tweet bot!
 
 ### 2. Get Twitter API Credentials
@@ -382,7 +382,7 @@ This error means your Twitter API access level doesn't support v1.1 tweet postin
 ### "Failed to generate tweet"
 
 1. Verify your Gemini API key is valid
-2. Check that you're within the free tier rate limits (15 RPM, 1500 RPD)
+2. Check that you're within the free tier rate limits (10 RPM, 250 RPD)
 3. Review the error message in logs
 4. Ensure your Google Cloud project is properly configured
 

src/main/java/com/voidcode/tweetbot/service/GeminiService.java

@@ -12,7 +12,7 @@ import java.util.concurrent.TimeUnit;
 public class GeminiService {
     private static final Logger logger = LoggerFactory.getLogger(GeminiService.class);
     private static final int MAX_TWEET_LENGTH = 280;
-    private static final String GEMINI_API_URL = "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash-exp:generateContent";
+    private static final String GEMINI_API_URL = "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent";
     private static final MediaType JSON = MediaType.get("application/json; charset=utf-8");
 
     private final String apiKey;
@@ -27,7 +27,7 @@ public class GeminiService {
                 .writeTimeout(60, TimeUnit.SECONDS)
                 .build();
         this.objectMapper = new ObjectMapper();
-        logger.info("Gemini service initialized with model: gemini-2.0-flash-exp");
+        logger.info("Gemini service initialized with model: gemini-2.5-flash");
     }
 
     /**
@@ -39,19 +39,16 @@ public class GeminiService {
         try {
             logger.info("Generating tweet with prompt: {}", prompt);
 
-            // Build the request body
+            // Build the request body with simplified prompt
-            String systemInstruction = "You are a creative social media content creator. Generate engaging tweets that are concise, " +
+            String fullPrompt = "You are a creative social media content creator. Generate an engaging tweet (under 280 characters) about: " + prompt;
-                    "interesting, and within Twitter's character limit. Do not include hashtags unless specifically " +
-                    "requested. Keep it under 280 characters.";
-
-            String userPrompt = prompt + " Keep it under " + MAX_TWEET_LENGTH + " characters.";
 
             String jsonBody = String.format(
-                "{\"contents\":[{\"parts\":[{\"text\":\"%s\\n\\n%s\"}]}],\"generationConfig\":{\"temperature\":0.8,\"maxOutputTokens\":100}}",
+                "{\"contents\":[{\"parts\":[{\"text\":\"%s\"}]}],\"generationConfig\":{\"temperature\":0.8,\"maxOutputTokens\":100000}}",
-                escapeJson(systemInstruction),
+                escapeJson(fullPrompt)
-                escapeJson(userPrompt)
             );
 
+            logger.debug("Request body: {}", jsonBody);
+
             // Build the request
             Request request = new Request.Builder()
                     .url(GEMINI_API_URL + "?key=" + apiKey)
@@ -84,7 +81,21 @@ public class GeminiService {
 
                 JsonNode parts = content.get("parts");
                 if (parts == null || parts.isEmpty()) {
-                    throw new RuntimeException("No parts in Gemini response");
+                    // Check for finish reason to understand why content was blocked
+                    JsonNode finishReason = candidates.get(0).get("finishReason");
+                    JsonNode safetyRatings = candidates.get(0).get("safetyRatings");
+
+                    String errorMsg = "No parts in Gemini response.";
+                    if (finishReason != null) {
+                        errorMsg += " Finish reason: " + finishReason.asText();
+                    }
+                    if (safetyRatings != null) {
+                        errorMsg += " Safety ratings: " + safetyRatings.toString();
+                    }
+                    errorMsg += " Full candidate: " + candidates.get(0).toString();
+
+                    logger.error(errorMsg);
+                    throw new RuntimeException(errorMsg);
                 }
 
                 String generatedText = parts.get(0).get("text").asText().trim();