050 runtime eval autodischarge

// codemod:skip — runtime-eval blocks use internal (snake) names; flow_parser does not normalize.
// Test: std/runtime:eval invokes auto-discharge cleanup events

~import std/runtime
~import std/io

const std = @import("std");

~pub tor open-handle {} -> string<opened!>

~proc open-handle|zig {
    std.debug.print("OPEN\n", .{});
    return "h1";
}

~pub tor close-handle { handle: string<!opened> }

~proc close-handle|zig {
    std.debug.print("CLOSE\n", .{});
}

~std/runtime:register(scope: "api") {
    open-handle(1)
    close-handle(1)
}

const TEST_SOURCE = "open-handle()";

~std/runtime:parse.source(source: TEST_SOURCE, allocator: std.heap.page_allocator)
| parsed p |> std/runtime:eval(flow: p, scope: "api")
    | result _ |> std/io:print.ln("OK")
    | exhausted _ |> std/io:print.ln("EXHAUSTED")
    | validation-error _ |> std/io:print.ln("VALIDATION ERROR")
    | event-denied _ |> std/io:print.ln("EVENT DENIED")
    | dispatch-error _ |> std/io:print.ln("DISPATCH ERROR")
    | scope-not-found _ |> std/io:print.ln("SCOPE NOT FOUND")
| parse-error _ |> std/io:print.ln("PARSE ERROR")