const std = @import("std"); pub const default_max_agent_steps: usize = 0; pub fn resolveMaxAgentSteps(configured: ?usize, default_value: usize) usize {    return configured orelse default_value;} pub fn parseMaxAgentSteps(raw: ?[]const u8) ?usize {    const trimmed = std.mem.trim(u8, raw orelse return null, " \t\r\n");    if (trimmed.len == 0) return null;    return std.fmt.parseUnsigned(usize, trimmed, 10) catch null;} pub fn resolveMaxAgentStepsWithOverride(    configured: ?usize,    default_value: usize,    process_override: ?[]const u8,) usize {    return parseMaxAgentSteps(process_override) orelse resolveMaxAgentSteps(configured, default_value);} pub fn allowsStep(limit: usize, completed_steps: usize) bool {    return limit == 0 or completed_steps < limit;} test "resolve max agent steps preserves explicit unbounded zero" {    try std.testing.expectEqual(@as(usize, 25), resolveMaxAgentSteps(null, 25));    try std.testing.expectEqual(@as(usize, 0), resolveMaxAgentSteps(0, 25));    try std.testing.expectEqual(@as(usize, 50), resolveMaxAgentSteps(50, 25));} test "parse max agent steps accepts zero and rejects invalid input" {    try std.testing.expectEqual(@as(usize, 0), parseMaxAgentSteps("0").?);    try std.testing.expectEqual(@as(usize, 24), parseMaxAgentSteps("24").?);    try std.testing.expect(parseMaxAgentSteps(null) == null);    try std.testing.expect(parseMaxAgentSteps("") == null);    try std.testing.expect(parseMaxAgentSteps("abc") == null);} test "process overrides resolve with configured and compiled defaults" {    try std.testing.expectEqual(@as(usize, 0), resolveMaxAgentStepsWithOverride(null, default_max_agent_steps, null));    try std.testing.expectEqual(@as(usize, 0), resolveMaxAgentStepsWithOverride(0, 24, null));    try std.testing.expectEqual(@as(usize, 24), resolveMaxAgentStepsWithOverride(null, 0, "24"));    try std.testing.expectEqual(@as(usize, 0), resolveMaxAgentStepsWithOverride(24, 8, "0"));    try std.testing.expectEqual(@as(usize, 24), resolveMaxAgentStepsWithOverride(24, 8, "invalid"));    try std.testing.expectEqual(@as(usize, 24), resolveMaxAgentStepsWithOverride(24, 8, "  \t\n"));} test "agent step policy treats zero as unbounded and positives as exact caps" {    try std.testing.expect(allowsStep(0, 0));    try std.testing.expect(allowsStep(0, 25));    try std.testing.expect(allowsStep(2, 0));    try std.testing.expect(allowsStep(2, 1));    try std.testing.expect(!allowsStep(2, 2));}