006 identity branch phantom

// Test: Identity branches with phantom types in runtime dispatcher
// The runtime dispatcher must handle identity branches (bare types, not structs)

~import std/runtime
~import std/io

// Identity branch with phantom annotation
~pub event create {}
| handle []const u8<active!>

~create => handle "resource_1"

// Discharge event
~pub event destroy { h: []const u8<!active> }

~proc destroy|zig {
    std.debug.print("destroyed: {s}\n", .{h});
}

const std = @import("std");

~std/runtime:register(scope: "test") {
    create(10)
    destroy(1)
}

const TEST_SOURCE = "~create()\n| handle h |> result { id: h }";

~std/runtime:run(source: TEST_SOURCE, scope: "test", budget: 100)
| result _ |> std/io:print.ln("PASS: got handle")
| exhausted _ |> std/io:print.ln("FAIL: exhausted")
| parse-error _ |> std/io:print.ln("FAIL: parse_error")
| validation-error _ |> std/io:print.ln("FAIL: validation_error")
| shape-error _ |> std/io:print.ln("FAIL: shape_error")
| event-denied _ |> std/io:print.ln("FAIL: event_denied")
| dispatch-error _ |> std/io:print.ln("FAIL: dispatch_error")
| scope-not-found _ |> std/io:print.ln("FAIL: scope_not_found")