Initial commit: Add project files

templates/dotnet/Module/Module.cs.template

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+namespace __MODULE__;
+
+public static class Module
+{
+    public static IServiceCollection Add__MODULE__(this IServiceCollection services)
+    {
+        // Register only module-owned policies, application handlers, and adapters.
+        return services;
+    }
+}

templates/dotnet/VerticalSlice/Endpoint.cs.template

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+using FastEndpoints;
+
+namespace __MODULE__.Features.__SLICE__;
+
+public sealed class Endpoint(Handler handler) : Endpoint<Request, Response>
+{
+    public override void Configure()
+    {
+        __HTTP_METHOD__("/__ROUTE__");
+        Roles("__ROLE__");
+        Description(x => x.WithTags("__MODULE__"));
+    }
+
+    public override async Task HandleAsync(Request req, CancellationToken ct)
+    {
+        var result = await handler.HandleAsync(req, HttpContext.TraceIdentifier, ct);
+        await Send.OkAsync(result, ct);
+    }
+}

templates/dotnet/VerticalSlice/Handler.cs.template

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+namespace __MODULE__.Features.__SLICE__;
+
+public sealed class Handler(/* narrow ports only */)
+{
+    public async Task<Response> HandleAsync(Request request, string correlationId, CancellationToken ct)
+    {
+        // 1) server-side PIT context 2) idempotency 3) transaction 4) policy 5) outbox
+        throw new NotImplementedException("Complete the approved Slice Spec; do not guess missing contracts.");
+    }
+}

templates/dotnet/VerticalSlice/Policy.cs.template

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+namespace __MODULE__.Domain;
+
+public sealed class __POLICY__
+{
+    public Decision Evaluate(ApprovedPointInTimeInput input)
+    {
+        // Pure decision only. No Dapper, HTTP, Hangfire, DateTime.Now, or mutable global state.
+        throw new NotImplementedException();
+    }
+}

templates/dotnet/VerticalSlice/README.md.template

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+# __SLICE__
+
+- Requirement: __REQUIREMENT_ID__
+- Module: __MODULE__
+- Route: `__HTTP_METHOD__ /__ROUTE__`
+- Role: `__ROLE__`
+- Generated status: SCAFFOLD_ONLY / DECISION_REQUIRED contracts remain blocked.

templates/dotnet/VerticalSlice/Request.cs.template

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+namespace __MODULE__.Features.__SLICE__;
+
+public sealed record Request(/* approved request fields only */);

templates/dotnet/VerticalSlice/Response.cs.template

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+namespace __MODULE__.Features.__SLICE__;
+
+public sealed record Response(/* approved response fields only */);

templates/dotnet/VerticalSlice/Sql.cs.template

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+namespace __MODULE__.Features.__SLICE__;
+
+internal static class Sql
+{
+    internal const string ReadApprovedContext = """
+        -- SCAFFOLD_ONLY: replace only after schema ownership, explicit columns,
+        -- PIT cutoff, quality gate and key contract are approved in the Slice Spec.
+        select 1 as contract_not_ready
+        where false;
+        """;
+}

templates/dotnet/VerticalSlice/Tests.cs.template

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+public sealed class __SLICE__Tests
+{
+    [Fact]
+    public void Golden_case_is_reproducible() { }
+
+    [Fact]
+    public void Boundary_and_forbidden_transition_fail_closed() { }
+
+    [Fact]
+    public void Same_idempotency_key_has_one_side_effect() { }
+}

templates/dotnet/VerticalSlice/Validator.cs.template

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+using FastEndpoints;
+using FluentValidation;
+
+namespace __MODULE__.Features.__SLICE__;
+
+public sealed class Validator : Validator<Request>
+{
+    public Validator()
+    {
+        // Translate approved boundary rules only; UNKNOWN and DECISION_REQUIRED must fail closed.
+    }
+}