diff --git a/.changeset/single-line-output.md b/.changeset/single-line-output.md
new file mode 100644
index 0000000..36621cc
--- /dev/null
+++ b/.changeset/single-line-output.md
@@ -0,0 +1,5 @@
+---
+"agentcrumbs": patch
+---
+
+Format crumb data on the same line as the message instead of a separate line
diff --git a/packages/agentcrumbs/src/cli/format.ts b/packages/agentcrumbs/src/cli/format.ts
index 90bcaf7..6b9426a 100644
--- a/packages/agentcrumbs/src/cli/format.ts
+++ b/packages/agentcrumbs/src/cli/format.ts
@@ -10,7 +10,7 @@ function formatDelta(dt: number): string {
 
 function formatData(data: unknown): string {
   if (data === undefined || data === null) return "";
-  return inspect(data, { colors: true, compact: true, depth: 4, breakLength: 100 });
+  return inspect(data, { colors: true, compact: true, depth: 4, breakLength: Infinity });
 }
 
 export function formatCrumbPretty(crumb: Crumb): string {
@@ -61,7 +61,7 @@ export function formatCrumbPretty(crumb: Crumb): string {
 
   const dataStr = formatData(crumb.data);
   if (dataStr) {
-    line += `\n${"  ".repeat(depth)}  ${dataStr}`;
+    line += ` ${dataStr}`;
   }
 
   return line;
diff --git a/packages/agentcrumbs/src/sinks/console.ts b/packages/agentcrumbs/src/sinks/console.ts
index f045fb3..397fd1f 100644
--- a/packages/agentcrumbs/src/sinks/console.ts
+++ b/packages/agentcrumbs/src/sinks/console.ts
@@ -10,7 +10,7 @@ function formatDelta(dt: number): string {
 
 function formatData(data: unknown): string {
   if (data === undefined || data === null) return "";
-  return inspect(data, { colors: true, compact: true, depth: 4, breakLength: 120 });
+  return inspect(data, { colors: true, compact: true, depth: 4, breakLength: Infinity });
 }
 
 function indent(depth: number): string {
@@ -62,7 +62,7 @@ export class ConsoleSink implements Sink {
 
     const dataStr = formatData(crumb.data);
     if (dataStr) {
-      line += `\n${pad}  ${dataStr}`;
+      line += ` ${dataStr}`;
     }
 
     process.stderr.write(line + "\n");