const std = @import("std");const domain = @import("../../core/subagent/domain.zig");const tool_provider = @import("../../core/subagent/tool_provider.zig");const tool_result = @import("../../core/subagent/tool_result.zig");const tool_dispatch = @import("../../core/tooling/tool_dispatch.zig");const types = @import("../../core/shared/types.zig"); const Allocator = std.mem.Allocator; pub const Input = struct {    command: domain.Command,     pub fn deinit(self: *Input, alloc: Allocator) void {        self.command.deinit(alloc);        self.* = undefined;    }}; const DecodeError = error{    OutOfMemory,    InvalidRoot,    MissingCommand,    UnknownField,    InvalidFieldType,    MissingField,    InvalidEnum,    InvalidInteger,}; pub fn decode(    ctx: tool_dispatch.DispatchContext,    args_json: []const u8,) tool_dispatch.DispatchError!tool_dispatch.DecodeResult {    var arena_state = std.heap.ArenaAllocator.init(ctx.allocator);    defer arena_state.deinit();    const arena = arena_state.allocator();     var parsed = std.json.parseFromSlice(std.json.Value, arena, args_json, .{}) catch {        return decodeFailure(ctx, "invalid_json") catch return error.OutOfMemory;    };    defer parsed.deinit();     const command_input = parseRoot(arena, parsed.value) catch |err| {        if (err == error.OutOfMemory) return error.OutOfMemory;        return decodeFailure(ctx, decodeErrorCode(err)) catch return error.OutOfMemory;    };    const command = domain.validateCommand(ctx.allocator, command_input) catch |err| {        if (err == error.OutOfMemory) return error.OutOfMemory;        return decodeFailure(ctx, validationErrorCode(err)) catch return error.OutOfMemory;    };    errdefer {        var owned = command;        owned.deinit(ctx.allocator);    }     const input = try ctx.allocator.create(Input);    input.* = .{ .command = command };    return .{ .input = .{ .ptr = input, .deinit_fn = inputDeinit } };} fn inputDeinit(ptr: *anyopaque, alloc: Allocator) void {    const input: *Input = @ptrCast(@alignCast(ptr));    input.deinit(alloc);    alloc.destroy(input);} fn decodeFailure(ctx: tool_dispatch.DispatchContext, code: []const u8) !tool_dispatch.DecodeResult {    return .{ .failure = try tool_result.failureAlloc(        ctx.allocator,        ctx.tool_call_id,        null,        "rejected",        code,        false,        null,    ) };} fn decodeErrorCode(err: DecodeError) []const u8 {    return switch (err) {        error.OutOfMemory => unreachable,        error.InvalidRoot => "invalid_root",        error.MissingCommand => "missing_command",        error.UnknownField => "unknown_field",        error.InvalidFieldType => "invalid_field_type",        error.MissingField => "missing_field",        error.InvalidEnum => "invalid_enum",        error.InvalidInteger => "invalid_integer",    };} fn validationErrorCode(err: domain.ValidationError) []const u8 {    return switch (err) {        error.InvalidBranchSelection => "invalid_branch_selection",        error.InvalidNestedBranchSelection => "invalid_nested_branch_selection",        error.MissingName => "missing_name",        error.MissingMode => "missing_mode",        error.MissingOneOffPrompt => "missing_one_off_prompt",        error.MissingInspectId => "missing_inspect_id",        error.InvalidId => "invalid_id",        error.InvalidName => "invalid_name",        error.InvalidModel => "invalid_model",        error.InvalidPrompt => "invalid_prompt",        error.InvalidMessage => "invalid_message",        error.InvalidOperationId => "invalid_operation_id",        error.InvalidNotificationPolicy => "invalid_notification_policy",        error.DuplicateMilestone => "duplicate_milestone",        error.DuplicateStopCondition => "duplicate_stop_condition",        error.InvalidInspectSections => "invalid_inspect_sections",        error.InvalidInspectWait => "invalid_inspect_wait",        error.InvalidCursor => "invalid_cursor",        error.InvalidPageLimit => "invalid_page_limit",        error.InvalidRelationship => "invalid_relationship",        error.EmptyConfiguration => "empty_configuration",        error.OutOfMemory => unreachable,    };} fn parseRoot(arena: Allocator, value: std.json.Value) (DecodeError || Allocator.Error)!domain.CommandInput {    const root = try objectValue(value);    try rejectUnknown(root, &.{"command"});    const command_value = root.get("command") orelse return error.MissingCommand;    const command = try objectValue(command_value);    try rejectUnknown(command, &.{ "create", "inspect", "message", "relationship", "configure", "lifecycle" });     return .{        .create = if (command.get("create")) |branch| try parseCreate(arena, branch) else null,        .inspect = if (command.get("inspect")) |branch| try parseInspect(arena, branch) else null,        .message = if (command.get("message")) |branch| try parseMessage(arena, branch) else null,        .relationship = if (command.get("relationship")) |branch| try parseRelationship(branch) else null,        .configure = if (command.get("configure")) |branch| try parseConfigure(arena, branch) else null,        .lifecycle = if (command.get("lifecycle")) |branch| try parseLifecycle(branch) else null,    };} fn parseCreate(arena: Allocator, value: std.json.Value) (DecodeError || Allocator.Error)!domain.CreateInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "name", "mode", "prompt", "model", "effort", "permission_mode", "notifications" });    return .{        .name = try optionalString(object, "name"),        .mode = if (try optionalString(object, "mode")) |raw| try parseMode(raw) else null,        .prompt = try optionalString(object, "prompt"),        .model = try optionalString(object, "model"),        .effort = if (try optionalString(object, "effort")) |raw|            types.ReasoningEffort.parse(raw) orelse return error.InvalidEnum        else            null,        .permission_mode = if (try optionalString(object, "permission_mode")) |raw|            std.meta.stringToEnum(types.PermissionMode, raw) orelse                return error.InvalidEnum        else            null,        .notifications = if (object.get("notifications")) |raw| try parseNotifications(arena, raw) else null,    };} fn parseInspect(arena: Allocator, value: std.json.Value) (DecodeError || Allocator.Error)!domain.InspectInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "id", "sections", "cursor", "limit", "wait" });    return .{        .id = try optionalString(object, "id"),        .sections = if (object.get("sections")) |raw| try parseInspectSections(arena, raw) else &.{},        .cursor = try optionalString(object, "cursor"),        .limit = if (object.get("limit")) |raw| try positiveUsize(raw) else null,        .wait = if (object.get("wait")) |raw| try parseInspectWait(raw) else null,    };} fn parseInspectWait(value: std.json.Value) DecodeError!domain.InspectWaitInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "until", "after_generation", "timeout_ms" });    return .{        .until = if (try optionalString(object, "until")) |raw|            if (std.mem.eql(u8, raw, "settled"))                .settled            else                return error.InvalidEnum        else            null,        .after_generation = if (object.get("after_generation")) |raw|            try nonNegativeU64(raw)        else            null,        .timeout_ms = if (object.get("timeout_ms")) |raw|            try positiveU64(raw)        else            null,    };} fn parseMessage(arena: Allocator, value: std.json.Value) (DecodeError || Allocator.Error)!domain.MessageInput {    _ = arena;    const object = try objectValue(value);    try rejectUnknown(object, &.{ "send", "milestone" });    return .{        .send = if (object.get("send")) |raw| try parseSend(raw) else null,        .milestone = if (object.get("milestone")) |raw| try parseMilestone(raw) else null,    };} fn parseSend(value: std.json.Value) DecodeError!domain.MessageSendInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "id", "content" });    return .{        .id = try requiredString(object, "id"),        .content = try requiredString(object, "content"),    };} fn parseMilestone(value: std.json.Value) DecodeError!domain.MessageMilestoneInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{"name"});    return .{ .name = try requiredString(object, "name") };} fn parseRelationship(value: std.json.Value) DecodeError!domain.RelationshipInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "action", "id", "parent_id" });    const action_raw = try requiredString(object, "action");    const action: domain.RelationshipAction = if (std.mem.eql(u8, action_raw, "attach"))        .attach    else if (std.mem.eql(u8, action_raw, "detach"))        .detach    else if (std.mem.eql(u8, action_raw, "reparent"))        .reparent    else        return error.InvalidEnum;    return .{        .action = action,        .id = try requiredString(object, "id"),        .parent_id = try optionalString(object, "parent_id"),    };} fn parseConfigure(arena: Allocator, value: std.json.Value) (DecodeError || Allocator.Error)!domain.ConfigureInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "id", "name", "model", "effort", "permission_mode", "notifications" });    return .{        .id = try requiredString(object, "id"),        .name = try optionalString(object, "name"),        .model = try optionalString(object, "model"),        .effort = if (try optionalString(object, "effort")) |raw|            types.ReasoningEffort.parse(raw) orelse return error.InvalidEnum        else            null,        .permission_mode = if (try optionalString(object, "permission_mode")) |raw|            std.meta.stringToEnum(types.PermissionMode, raw) orelse                return error.InvalidEnum        else            null,        .notifications = if (object.get("notifications")) |raw| try parseNotifications(arena, raw) else null,    };} fn parseLifecycle(value: std.json.Value) DecodeError!domain.LifecycleInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "id", "action" });    const action_raw = try requiredString(object, "action");    const action: domain.LifecycleAction = if (std.mem.eql(u8, action_raw, "cancel"))        .cancel    else if (std.mem.eql(u8, action_raw, "resume"))        .@"resume"    else if (std.mem.eql(u8, action_raw, "close"))        .close    else if (std.mem.eql(u8, action_raw, "reopen"))        .reopen    else        return error.InvalidEnum;    return .{        .id = try requiredString(object, "id"),        .action = action,    };} fn parseNotifications(    arena: Allocator,    value: std.json.Value,) (DecodeError || Allocator.Error)!domain.NotificationPolicyInput {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "terminal", "milestones", "report_interval_ms", "report_duration_ms", "stop_conditions" });    var result = domain.NotificationPolicyInput{};    if (object.get("terminal")) |raw| result.terminal = try parseTerminal(raw);    if (object.get("milestones")) |raw| result.milestones = try parseStringArray(arena, raw);    if (object.get("report_interval_ms")) |raw| result.report_interval_ms = try positiveU64(raw);    if (object.get("report_duration_ms")) |raw| result.report_duration_ms = try positiveU64(raw);    if (object.get("stop_conditions")) |raw| result.stop_conditions = try parseStopConditions(arena, raw);    return result;} fn parseTerminal(value: std.json.Value) DecodeError!domain.TerminalEvents {    const object = try objectValue(value);    try rejectUnknown(object, &.{ "completed", "failed", "cancelled" });    var result = domain.TerminalEvents{};    if (object.get("completed")) |raw| result.completed = try boolValue(raw);    if (object.get("failed")) |raw| result.failed = try boolValue(raw);    if (object.get("cancelled")) |raw| result.cancelled = try boolValue(raw);    return result;} fn parseInspectSections(arena: Allocator, value: std.json.Value) (DecodeError || Allocator.Error)![]domain.InspectSection {    if (value != .array) return error.InvalidFieldType;    const out = try arena.alloc(domain.InspectSection, value.array.items.len);    for (value.array.items, 0..) |item, index| {        const raw = try stringValue(item);        out[index] = if (std.mem.eql(u8, raw, "status"))            .status        else if (std.mem.eql(u8, raw, "messages"))            .messages        else if (std.mem.eql(u8, raw, "tool_activity"))            .tool_activity        else if (std.mem.eql(u8, raw, "events"))            .events        else if (std.mem.eql(u8, raw, "configuration"))            .configuration        else if (std.mem.eql(u8, raw, "relationship"))            .relationship        else            return error.InvalidEnum;    }    return out;} fn parseStopConditions(arena: Allocator, value: std.json.Value) (DecodeError || Allocator.Error)![]domain.StopCondition {    if (value != .array) return error.InvalidFieldType;    const out = try arena.alloc(domain.StopCondition, value.array.items.len);    for (value.array.items, 0..) |item, index| {        const raw = try stringValue(item);        out[index] = if (std.mem.eql(u8, raw, "terminal"))            .terminal        else if (std.mem.eql(u8, raw, "duration_elapsed"))            .duration_elapsed        else            return error.InvalidEnum;    }    return out;} fn parseStringArray(arena: Allocator, value: std.json.Value) (DecodeError || Allocator.Error)![][]const u8 {    if (value != .array) return error.InvalidFieldType;    const out = try arena.alloc([]const u8, value.array.items.len);    for (value.array.items, 0..) |item, index| out[index] = try stringValue(item);    return out;} fn parseMode(raw: []const u8) DecodeError!domain.Mode {    if (std.mem.eql(u8, raw, "one_off")) return .one_off;    if (std.mem.eql(u8, raw, "persistent")) return .persistent;    return error.InvalidEnum;} fn objectValue(value: std.json.Value) DecodeError!std.json.ObjectMap {    return if (value == .object) value.object else error.InvalidFieldType;} fn stringValue(value: std.json.Value) DecodeError![]const u8 {    return if (value == .string) value.string else error.InvalidFieldType;} fn boolValue(value: std.json.Value) DecodeError!bool {    return if (value == .bool) value.bool else error.InvalidFieldType;} fn requiredString(object: std.json.ObjectMap, key: []const u8) DecodeError![]const u8 {    const value = object.get(key) orelse return error.MissingField;    return stringValue(value);} fn optionalString(object: std.json.ObjectMap, key: []const u8) DecodeError!?[]const u8 {    const value = object.get(key) orelse return null;    return try stringValue(value);} fn positiveU64(value: std.json.Value) DecodeError!u64 {    if (value != .integer or value.integer <= 0) return error.InvalidInteger;    return std.math.cast(u64, value.integer) orelse error.InvalidInteger;} fn nonNegativeU64(value: std.json.Value) DecodeError!u64 {    if (value != .integer or value.integer < 0) return error.InvalidInteger;    return std.math.cast(u64, value.integer) orelse error.InvalidInteger;} fn positiveUsize(value: std.json.Value) DecodeError!usize {    const parsed = try positiveU64(value);    return std.math.cast(usize, parsed) orelse error.InvalidInteger;} fn rejectUnknown(object: std.json.ObjectMap, allowed: []const []const u8) DecodeError!void {    var fields = object.iterator();    while (fields.next()) |entry| {        for (allowed) |name| {            if (std.mem.eql(u8, entry.key_ptr.*, name)) break;        } else return error.UnknownField;    }} pub fn validate(    _: tool_dispatch.DispatchContext,    _: tool_dispatch.ToolInput,) tool_dispatch.DispatchError!?[]u8 {    return null;} pub fn call(    ctx: tool_dispatch.DispatchContext,    erased: tool_dispatch.ToolInput,) tool_dispatch.DispatchError!tool_dispatch.ToolResult {    const provider = ctx.subagent_provider orelse {        const body = tool_result.failureAlloc(            ctx.allocator,            ctx.tool_call_id,            null,            "rejected",            "host_unavailable",            false,            null,        ) catch |err| return switch (err) {            error.OutOfMemory, error.WriteFailed => error.OutOfMemory,        };        return .{ .failure = body };    };    const result = try provider.execute(        ctx.allocator,        &erased.as(Input).command,        ctx.tool_call_id,    );    return switch (result.status) {        .success => .{ .success = result.body },        .failure => .{ .failure = result.body },    };} pub fn readsOnly(input: tool_dispatch.ToolInput) bool {    return switch (input.as(Input).command) {        .inspect => true,        else => false,    };} pub fn isIrreversible(_: tool_dispatch.ToolInput) bool {    return false;} fn expectDecodeFailure(args_json: []const u8, code: []const u8) !void {    const alloc = std.testing.allocator;    const result = try decode(.{ .allocator = alloc }, args_json);    switch (result) {        .input => |input| {            input.deinit(alloc);            return error.TestUnexpectedResult;        },        .failure => |message| {            defer alloc.free(message);            const needle = try std.fmt.allocPrint(alloc, "\"error_code\":\"{s}\"", .{code});            defer alloc.free(needle);            try std.testing.expect(std.mem.find(u8, message, needle) != null);        },    }} fn expectCommandTag(args_json: []const u8, expected: std.meta.Tag(domain.Command)) !void {    const alloc = std.testing.allocator;    const result = try decode(.{ .allocator = alloc }, args_json);    switch (result) {        .failure => |message| {            defer alloc.free(message);            return error.TestUnexpectedResult;        },        .input => |input| {            defer input.deinit(alloc);            try std.testing.expectEqual(expected, std.meta.activeTag(input.as(Input).command));        },    }} test "call executes a validated command through the registered provider" {    const Fixture = struct {        calls: usize = 0,        command: ?*domain.Command = null,        invocation_id: ?[]const u8 = null,         fn execute(            raw_context: ?*anyopaque,            alloc: Allocator,            command: *domain.Command,            invocation_id: []const u8,        ) Allocator.Error!tool_provider.Result {            const self: *@This() = @ptrCast(@alignCast(raw_context.?));            self.calls += 1;            self.command = command;            self.invocation_id = invocation_id;            return .{                .status = .success,                .body = try alloc.dupe(u8, "{\"ok\":true}"),            };        }    };     const alloc = std.testing.allocator;    const decoded = try decode(

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