Switch to JSONL format logs (instead of JSON)

.claude/hooks/notification.py

@@ -92,28 +92,15 @@ def main():
         # Read JSON input from stdin
         input_data = json.loads(sys.stdin.read())
 
-        # Ensure log directory exists
-        import os
-        log_dir = os.path.join(os.getcwd(), 'logs')
-        os.makedirs(log_dir, exist_ok=True)
-        log_file = os.path.join(log_dir, 'notification.json')
+        # Ensure logs directory exists
+        log_dir = Path("logs")
+        log_dir.mkdir(parents=True, exist_ok=True)
+        log_file = log_dir / 'notification.jsonl'
 
-        # Read existing log data or initialize empty list
-        if os.path.exists(log_file):
-            with open(log_file, 'r') as f:
-                try:
-                    log_data = json.load(f)
-                except (json.JSONDecodeError, ValueError):
-                    log_data = []
-        else:
-            log_data = []
-
-        # Append new data
-        log_data.append(input_data)
-
-        # Write back to file with formatting
-        with open(log_file, 'w') as f:
-            json.dump(log_data, f, indent=2)
+        # Append new data as a single line to JSONL file
+        with open(log_file, 'a') as f:
+            json.dump(input_data, f)
+            f.write('\n')
 
         # Announce notification via TTS only if --notify flag is set
         # Skip TTS for the generic "Claude is waiting for your input" message

.claude/hooks/post_tool_use.py

@@ -13,27 +13,15 @@ def main():
         # Read JSON input from stdin
         input_data = json.load(sys.stdin)
 
-        # Ensure log directory exists
-        log_dir = Path.cwd() / 'logs'
+        # Ensure logs directory exists
+        log_dir = Path("logs")
         log_dir.mkdir(parents=True, exist_ok=True)
-        log_path = log_dir / 'post_tool_use.json'
+        log_file = log_dir / 'post_tool_use.jsonl'
 
-        # Read existing log data or initialize empty list
-        if log_path.exists():
-            with open(log_path, 'r') as f:
-                try:
-                    log_data = json.load(f)
-                except (json.JSONDecodeError, ValueError):
-                    log_data = []
-        else:
-            log_data = []
-
-        # Append new data
-        log_data.append(input_data)
-
-        # Write back to file with formatting
-        with open(log_path, 'w') as f:
-            json.dump(log_data, f, indent=2)
+        # Append new data as a single line to JSONL file
+        with open(log_file, 'a') as f:
+            json.dump(input_data, f)
+            f.write('\n')
 
         sys.exit(0)
 

.claude/hooks/pre_compact.py

@@ -25,24 +25,12 @@ def log_pre_compact(input_data):
     # Ensure logs directory exists
     log_dir = Path("logs")
     log_dir.mkdir(parents=True, exist_ok=True)
-    log_file = log_dir / 'pre_compact.json'
+    log_file = log_dir / 'pre_compact.jsonl'
 
-    # Read existing log data or initialize empty list
-    if log_file.exists():
-        with open(log_file, 'r') as f:
-            try:
-                log_data = json.load(f)
-            except (json.JSONDecodeError, ValueError):
-                log_data = []
-    else:
-        log_data = []
-
-    # Append the entire input data
-    log_data.append(input_data)
-
-    # Write back to file with formatting
-    with open(log_file, 'w') as f:
-        json.dump(log_data, f, indent=2)
+    # Append new data as a single line to JSONL file
+    with open(log_file, 'a') as f:
+        json.dump(input_data, f)
+        f.write('\n')
 
 
 def backup_transcript(transcript_path, trigger):

.claude/hooks/pre_tool_use.py

@@ -104,27 +104,15 @@ def main():
                 print("BLOCKED: Dangerous rm command detected and prevented", file=sys.stderr)
                 sys.exit(2)  # Exit code 2 blocks tool call and shows error to Claude
 
-        # Ensure log directory exists
-        log_dir = Path.cwd() / 'logs'
+        # Ensure logs directory exists
+        log_dir = Path("logs")
         log_dir.mkdir(parents=True, exist_ok=True)
-        log_path = log_dir / 'pre_tool_use.json'
+        log_file = log_dir / 'pre_tool_use.jsonl'
 
-        # Read existing log data or initialize empty list
-        if log_path.exists():
-            with open(log_path, 'r') as f:
-                try:
-                    log_data = json.load(f)
-                except (json.JSONDecodeError, ValueError):
-                    log_data = []
-        else:
-            log_data = []
-
-        # Append new data
-        log_data.append(input_data)
-
-        # Write back to file with formatting
-        with open(log_path, 'w') as f:
-            json.dump(log_data, f, indent=2)
+        # Append new data as a single line to JSONL file
+        with open(log_file, 'a') as f:
+            json.dump(input_data, f)
+            f.write('\n')
 
         sys.exit(0)
 

.claude/hooks/session_start.py

@@ -26,24 +26,12 @@ def log_session_start(input_data):
     # Ensure logs directory exists
     log_dir = Path("logs")
     log_dir.mkdir(parents=True, exist_ok=True)
-    log_file = log_dir / 'session_start.json'
+    log_file = log_dir / 'session_start.jsonl'
 
-    # Read existing log data or initialize empty list
-    if log_file.exists():
-        with open(log_file, 'r') as f:
-            try:
-                log_data = json.load(f)
-            except (json.JSONDecodeError, ValueError):
-                log_data = []
-    else:
-        log_data = []
-
-    # Append the entire input data
-    log_data.append(input_data)
-
-    # Write back to file with formatting
-    with open(log_file, 'w') as f:
-        json.dump(log_data, f, indent=2)
+    # Append new data as a single line to JSONL file
+    with open(log_file, 'a') as f:
+        json.dump(input_data, f)
+        f.write('\n')
 
 
 def get_git_status():

.claude/hooks/stop.py

@@ -152,27 +152,15 @@ def main():
         session_id = input_data.get("session_id", "")
         stop_hook_active = input_data.get("stop_hook_active", False)
 
-        # Ensure log directory exists
-        log_dir = os.path.join(os.getcwd(), "logs")
-        os.makedirs(log_dir, exist_ok=True)
-        log_path = os.path.join(log_dir, "stop.json")
-
-        # Read existing log data or initialize empty list
-        if os.path.exists(log_path):
-            with open(log_path, 'r') as f:
-                try:
-                    log_data = json.load(f)
-                except (json.JSONDecodeError, ValueError):
-                    log_data = []
-        else:
-            log_data = []
-
-        # Append new data
-        log_data.append(input_data)
-
-        # Write back to file with formatting
-        with open(log_path, 'w') as f:
-            json.dump(log_data, f, indent=2)
+        # Ensure logs directory exists
+        log_dir = Path("logs")
+        log_dir.mkdir(parents=True, exist_ok=True)
+        log_file = log_dir / 'stop.jsonl'
+
+        # Append new data as a single line to JSONL file
+        with open(log_file, 'a') as f:
+            json.dump(input_data, f)
+            f.write('\n')
 
         # Handle --chat switch
         if args.chat and 'transcript_path' in input_data:

.claude/hooks/subagent_stop.py

@@ -90,27 +90,15 @@ def main():
         session_id = input_data.get("session_id", "")
         stop_hook_active = input_data.get("stop_hook_active", False)
 
-        # Ensure log directory exists
-        log_dir = os.path.join(os.getcwd(), "logs")
-        os.makedirs(log_dir, exist_ok=True)
-        log_path = os.path.join(log_dir, "subagent_stop.json")
-
-        # Read existing log data or initialize empty list
-        if os.path.exists(log_path):
-            with open(log_path, 'r') as f:
-                try:
-                    log_data = json.load(f)
-                except (json.JSONDecodeError, ValueError):
-                    log_data = []
-        else:
-            log_data = []
-
-        # Append new data
-        log_data.append(input_data)
-
-        # Write back to file with formatting
-        with open(log_path, 'w') as f:
-            json.dump(log_data, f, indent=2)
+        # Ensure logs directory exists
+        log_dir = Path("logs")
+        log_dir.mkdir(parents=True, exist_ok=True)
+        log_file = log_dir / 'subagent_stop.jsonl'
+
+        # Append new data as a single line to JSONL file
+        with open(log_file, 'a') as f:
+            json.dump(input_data, f)
+            f.write('\n')
 
         # Handle --chat switch (same as stop.py)
         if args.chat and 'transcript_path' in input_data:

.claude/hooks/user_prompt_submit.py

@@ -25,24 +25,12 @@ def log_user_prompt(session_id, input_data):
     # Ensure logs directory exists
     log_dir = Path("logs")
     log_dir.mkdir(parents=True, exist_ok=True)
-    log_file = log_dir / 'user_prompt_submit.json'
+    log_file = log_dir / 'user_prompt_submit.jsonl'
 
-    # Read existing log data or initialize empty list
-    if log_file.exists():
-        with open(log_file, 'r') as f:
-            try:
-                log_data = json.load(f)
-            except (json.JSONDecodeError, ValueError):
-                log_data = []
-    else:
-        log_data = []
-
-    # Append the entire input data
-    log_data.append(input_data)
-
-    # Write back to file with formatting
-    with open(log_file, 'w') as f:
-        json.dump(log_data, f, indent=2)
+    # Append new data as a single line to JSONL file
+    with open(log_file, 'a') as f:
+        json.dump(input_data, f)
+        f.write('\n')
 
 
 def validate_prompt(prompt):