From 538a5d926fa626a00cc3dc12c555f11f82867efd Mon Sep 17 00:00:00 2001
From: t <t@tjp.lol>
Date: Mon, 22 Jun 2026 18:18:28 -0600
Subject: libpanto ponytail-audit simplifications

---
 libpanto/src/anthropic_messages_json.zig | 49 ++------------------------------
 1 file changed, 3 insertions(+), 46 deletions(-)

(limited to 'libpanto/src/anthropic_messages_json.zig')

diff --git a/libpanto/src/anthropic_messages_json.zig b/libpanto/src/anthropic_messages_json.zig
index 5f119f3..5085149 100644
--- a/libpanto/src/anthropic_messages_json.zig
+++ b/libpanto/src/anthropic_messages_json.zig
@@ -16,6 +16,7 @@ const Writer = std.Io.Writer;
 const conversation = @import("conversation.zig");
 const config_mod = @import("config.zig");
 const tool_registry_mod = @import("tool_registry.zig");
+const writeRawJson = @import("provider.zig").writeRawJson;
 
 // -----------------------------------------------------------------------------
 // Request serialization
@@ -147,44 +148,6 @@ pub fn serializeRequest(
     return try aw.toOwnedSlice();
 }
 
-/// Splice a pre-encoded JSON value into the current stringifier position.
-/// On parse failure, emit `{}` so we never produce invalid wire JSON.
-fn writeRawJson(s: *std.json.Stringify, raw: []const u8) !void {
-    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
-    defer arena.deinit();
-    const parsed = std.json.parseFromSlice(
-        std.json.Value,
-        arena.allocator(),
-        raw,
-        .{},
-    ) catch {
-        try s.beginObject();
-        try s.endObject();
-        return;
-    };
-    try s.write(parsed.value);
-}
-
-fn writeToolUseInput(s: *std.json.Stringify, raw: []const u8) !void {
-    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
-    defer arena.deinit();
-    const parsed = std.json.parseFromSlice(std.json.Value, arena.allocator(), raw, .{}) catch {
-        try s.beginObject();
-        try s.objectField("_invalid_input");
-        try s.write(raw);
-        try s.endObject();
-        return;
-    };
-    if (parsed.value != .object) {
-        try s.beginObject();
-        try s.objectField("_invalid_input");
-        try s.write(raw);
-        try s.endObject();
-        return;
-    }
-    try s.write(parsed.value);
-}
-
 /// Build the top-level Anthropic `system` string. Applies the shared
 /// append/replace derivation (see `conversation.effectiveSystemBlocks`),
 /// strips trailing newlines from each surviving block, and joins them with
@@ -335,7 +298,7 @@ fn writeBlock(
                 try s.beginObject();
                 try s.endObject();
             } else {
-                try writeToolUseInput(s, input_bytes);
+                try writeRawJson(s, input_bytes);
             }
             if (mark_cache) try writeCacheControl(s);
             try s.endObject();
@@ -455,7 +418,6 @@ pub const StreamUsage = struct {
 
 pub const StreamEvent = union(StreamEventTag) {
     message_start: struct {
-        role: ?[]const u8 = null,
         usage: StreamUsage = .{},
     },
     content_block_start: struct {
@@ -509,19 +471,15 @@ pub fn parseStreamEvent(allocator: Allocator, payload: []const u8) !ParsedStream
 
     const ty = type_v.string;
     if (std.mem.eql(u8, ty, "message_start")) {
-        var role: ?[]const u8 = null;
         var usage: StreamUsage = .{};
         if (root.object.get("message")) |m| {
             if (m == .object) {
-                if (m.object.get("role")) |r| {
-                    if (r == .string) role = r.string;
-                }
                 if (m.object.get("usage")) |u| {
                     if (u == .object) usage = parseStreamUsage(u.object);
                 }
             }
         }
-        return .{ .parsed = parsed, .event = .{ .message_start = .{ .role = role, .usage = usage } } };
+        return .{ .parsed = parsed, .event = .{ .message_start = .{ .usage = usage } } };
     }
 
     if (std.mem.eql(u8, ty, "content_block_start")) {
@@ -1119,7 +1077,6 @@ test "parseStreamEvent - message_start" {
     var pe = try parseStreamEvent(allocator, payload);
     defer pe.deinit();
     try testing.expectEqual(StreamEventTag.message_start, @as(StreamEventTag, pe.event));
-    try testing.expectEqualStrings("assistant", pe.event.message_start.role.?);
 }
 
 test "parseStreamEvent - content_block_start text" {
-- 
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