[hackathon] add nullwatch-py Python SDK to community SDKs

README.md

@@ -367,3 +367,6 @@ This keeps the service headless while letting `nullhub` own install/setup UI.
 - Add dataset, prompt version, and experiment entities.
 - Add regression diff endpoints for comparing prompt/model/strategy versions.
 - Add alert rules and anomaly summaries that `nullhub` can render.
+
+## Community SDKs
+- **[nullwatch-python-sdk](https://github.com/nullclaw/nullwatch-python-sdk/)** — Python SDK with zero required dependencies. Ships built-in eval scorers for RAG hallucination detection ([LettuceDetect](https://github.com/KRLabsOrg/LettuceDetect)) and tool-call schema validation.

src/compat/fs.zig

@@ -222,10 +222,7 @@ pub const Dir = struct {
     pub fn makePath(self: Dir, sub_path: []const u8) !void {
         if (sub_path.len == 0) return;
         if (path.isAbsolute(sub_path)) {
-            makeDirAbsolute(sub_path) catch |err| switch (err) {
-                error.PathAlreadyExists => return,
-                else => |e| return e,
-            };
+            try makePathAbsolute(sub_path);
             return;
         }
 
@@ -281,6 +278,10 @@ pub fn makeDirAbsolute(absolute_path: []const u8) Io.Dir.CreateDirError!void {
     try Io.Dir.createDirAbsolute(shared.io(), absolute_path, .default_dir);
 }
 
+pub fn makePathAbsolute(absolute_path: []const u8) Io.Dir.CreateDirPathError!void {
+    try Io.Dir.createDirPath(Io.Dir.cwd(), shared.io(), absolute_path);
+}
+
 pub fn deleteFileAbsolute(absolute_path: []const u8) Io.Dir.DeleteFileError!void {
     try Io.Dir.deleteFileAbsolute(shared.io(), absolute_path);
 }
@@ -305,3 +306,20 @@ pub fn realpathAlloc(allocator: Allocator, file_path: []const u8) ![]u8 {
     }
     return try cwd().realpathAlloc(allocator, file_path);
 }
+
+test "makePathAbsolute creates nested absolute directories" {
+    var tmp = std.testing.tmpDir(.{});
+    defer tmp.cleanup();
+
+    const tmp_dir = Dir.wrap(tmp.dir);
+    const root = try tmp_dir.realpathAlloc(std.testing.allocator, ".");
+    defer std.testing.allocator.free(root);
+
+    const nested = try path.join(std.testing.allocator, &.{ root, "nested", "path" });
+    defer std.testing.allocator.free(nested);
+
+    try makePathAbsolute(nested);
+    try accessAbsolute(nested, .{});
+
+    try makePathAbsolute(nested);
+}

src/from_json.zig

@@ -62,10 +62,7 @@ fn getU16(obj: std.json.ObjectMap, key: []const u8) ?u16 {
 
 fn ensureHome(home: []const u8) !void {
     if (std.fs.path.isAbsolute(home)) {
-        std_compat.fs.makeDirAbsolute(home) catch |err| switch (err) {
-            error.PathAlreadyExists => {},
-            else => return err,
-        };
+        try std_compat.fs.makePathAbsolute(home);
         return;
     }
 

src/store.zig

@@ -420,10 +420,7 @@ fn finalizeVerdict(summary: *domain.RunSummary) void {
 
 fn ensureDirExists(path: []const u8) !void {
     if (std.fs.path.isAbsolute(path)) {
-        std_compat.fs.makeDirAbsolute(path) catch |err| switch (err) {
-            error.PathAlreadyExists => {},
-            else => return err,
-        };
+        try std_compat.fs.makePathAbsolute(path);
         return;
     }