crap4csharp: faithful C# port of crap4java (WIP)

[parthopdas]

Running PR for the crap4csharp port — a high-fidelity C# port of the read-only Java tool crap4java. Driven task-by-task (T1–T16) via the hub-and-spoke agentic loop (Dave codes, Bhaskar verifies, Anders reviews, JARVIS orchestrates, Mr. Das decides). Authoritative plan: docs/features/crap4csharp-port.md; locked decisions: docs/decisions.md.

This is a WIP draft and will accumulate commits as tasks land. Do not merge until all slices are green and Mr. Das approves.

Progress

Slice	Status
S1 — scaffolding	✅ T1 done (d3dd17f) — Release build 0/0, dotnet test green
S2 — pure core	⏳ next
S3 — adapters	⏳
S4 — composition + fail-fast + e2e	⏳

T1 landed

• crap4csharp.sln + src/Crap4CSharp (net8.0 Exe, Roslyn Microsoft.CodeAnalysis.CSharp 4.14.0) + tests/Crap4CSharp.Tests (xUnit + coverlet + FluentAssertions pinned [7.0.0,8.0.0)), shared .targets imported, packages.lock.json committed.

Open decisions for Mr. Das (non-blocking for S2)

• C1 — single production assembly (convention-based layering) vs Core/Adapters/Exe split. Anders recommends single assembly.
• C2 — CA1707 (warnings-as-errors) forbids underscores in member names; keep PascalCase test names everywhere (recommended) vs suppress CA1707 for tests/**.

Co-authored-by: Copilot

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