diff --git a/environment/large_output.go b/environment/large_output.go
index 84509a5..d833ddf 100644
--- a/environment/large_output.go
+++ b/environment/large_output.go
@@ -17,8 +17,11 @@ import (
 var readCommandRe = regexp.MustCompile(`(?:^|[\s;|&])(?:cat|head|tail|less|more|bat)\s`)
 
 const (
-	// DefaultMaxOutputSize is the default character limit before truncation (~7.5k tokens)
-	DefaultMaxOutputSize = 30000 // ~7.5k tokens at 4 chars/token
+	// DefaultMaxOutputSize is the default character limit before truncation.
+	// 50000 chars (~12.5k tokens at 4 chars/token) matches Claude Code's
+	// DEFAULT_MAX_RESULT_SIZE_CHARS spill threshold — the point at which a tool
+	// result is persisted to a file and the agent gets a preview + path.
+	DefaultMaxOutputSize = 50000
 	// DefaultPreviewSize is the maximum characters for preview
 	DefaultPreviewSize = 8000 // ~2k tokens
 	// DefaultPreviewLines is the number of lines shown in the preview