failure retries scheme

1 files changed, 6 insertions, 0 deletions

diff --git a/libpanto/src/conversation.zig b/libpanto/src/conversation.zig
index 2c29f8e..f0c822d 100644
--- a/libpanto/src/conversation.zig
+++ b/libpanto/src/conversation.zig
@@ -71,6 +71,12 @@ pub const ResultPartStored = union(enum) {
 pub const ToolResultBlock = struct {
     tool_use_id: []const u8,
     parts: std.ArrayList(ResultPartStored) = .empty,
+    /// True when this result reports a tool failure rather than success.
+    /// Serialized to providers that support it (Anthropic's `is_error`);
+    /// recorded but unserialized for OpenAI Chat (the error text in `parts`
+    /// carries the signal there). Defaults to false for backward
+    /// compatibility with sessions written before this field existed.
+    is_error: bool = false,
 
     pub fn deinit(self: *ToolResultBlock, alloc: Allocator) void {
         alloc.free(self.tool_use_id);