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using System.Text.Json;
namespace Agent.Core.Tools;
public sealed class InternalToolDispatcher(IToolPolicyEngine policy, IInternalToolBackend backend)
{
public Task BeginTaskAsync(Guid taskId, Guid sessionId, CancellationToken cancellationToken) => backend.BeginTaskAsync(taskId, sessionId, cancellationToken);
public Task EndTaskAsync(Guid taskId, bool success, CancellationToken cancellationToken) => backend.EndTaskAsync(taskId, success, cancellationToken);
public async Task<ToolExecutionResult> DispatchAsync(Guid taskId, string toolName, JsonElement arguments, CancellationToken cancellationToken)
{
InternalToolValidator.Validate(toolName, arguments);
ToolPolicyDecision decision = policy.Evaluate(toolName, arguments);
if (!decision.Allowed) return new(false, decision.Reason, false, $"policy:{toolName}:{decision.Reason}", RetryAllowed: false,
ErrorCode: "policy.tool_denied", ErrorCategory: "policy", Resolution: "Review the enabled Internal Tool policy.");
return await backend.ExecuteAsync(taskId, toolName, arguments, cancellationToken).ConfigureAwait(false);
}
}
public sealed class FakeInternalToolBackend : IInternalToolBackend
{
private readonly List<(string Name, JsonElement Arguments)> _calls = [];
public IReadOnlyList<(string Name, JsonElement Arguments)> Calls => _calls;
public Task<ToolExecutionResult> ExecuteAsync(Guid taskId, string toolName, JsonElement arguments, CancellationToken cancellationToken)
{
_calls.Add((toolName, arguments.Clone()));
bool effect = toolName is "file_edit" or "process_run" or "dir";
return Task.FromResult(new ToolExecutionResult(true, "fake-ok", effect));
}
}
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