const std = @import("std"); const Allocator = std.mem.Allocator; /// Classifies command-shaped tool calls that use captured execution rather/// than a durable terminal session. Historical `run_command` records remain/// presentation-compatible even though that tool is no longer executable.pub fn isToolCall(    alloc: Allocator,    tool_name: []const u8,    arguments_json: []const u8,) Allocator.Error!bool {    if (std.mem.eql(u8, tool_name, "run_command")) return true;    if (!std.mem.eql(u8, tool_name, "terminal")) return false;     var parsed = std.json.parseFromSlice(std.json.Value, alloc, arguments_json, .{}) catch |err| switch (err) {        error.OutOfMemory => return error.OutOfMemory,        else => return false,    };    defer parsed.deinit();    if (parsed.value != .object) return false;    const action = parsed.value.object.get("action") orelse return false;    return action == .string and std.mem.eql(u8, action.string, "exec");} test "captured command classification recognizes terminal exec and historical records" {    const alloc = std.testing.allocator;    try std.testing.expect(try isToolCall(        alloc,        "terminal",        "{\"action\":\"exec\",\"command\":\"printf ok\"}",    ));    try std.testing.expect(!try isToolCall(        alloc,        "terminal",        "{\"action\":\"start\",\"command\":\"printf ok\"}",    ));    try std.testing.expect(try isToolCall(alloc, "run_command", "{}"));    try std.testing.expect(!try isToolCall(alloc, "read_file", "{}"));    try std.testing.expect(!try isToolCall(alloc, "terminal", "not-json"));}