008 obligation escapes via interface

✓ Passing This code compiles and runs correctly.

Code

~import app/fs
~app/fs:my-subflow()
| file-opened f |> app/fs:close(file: f)

input.kz

Actual

Opening file: data.txt
Closing file

Expected output

Opening file: data.txt
Closing file

Imported Files

const std = @import("std");
const File = struct { handle: i32 };

~pub event open { path: []const u8 }
| opened *File<opened!>

~proc open|zig {
    std.debug.print("Opening file: {s}\n", .{path});
    const allocator = std.heap.page_allocator;
    const f = allocator.create(File) catch unreachable;
    f.* = File{ .handle = 42 };
    return .{ .opened = f };
}

~pub event close { file: *File<!opened> }

~proc close|zig {
    std.debug.print("Closing file\n", .{});
}

// Subflow that opens a file and returns it with obligation
// The obligation escapes via the return signature - caller must handle it
~pub event my-subflow {}
| file-opened *File<opened!>

// SUBFLOW: Delegates to open, maps opened → file-opened
// The [opened!] obligation passes through to the caller
~my-subflow = open(path: "data.txt")
| opened f => file-opened f

fs.kz

Test Configuration

MUST_RUN

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