Scaffold WhiteMagic solution and add AGENTS.md

Create the WhiteMagic net8.0-windows class library and the WhiteMagicTest
xUnit project, grouped in WhiteMagic.slnx (SDK 10 default format). Library
enables nullable, unsafe blocks, x86/x64 platforms, warnings-as-errors.
Empty solution builds clean (0 errors, 0 warnings).

Add AGENTS.md (ASD-STE100) defining the build/test commands, the test-first
rule, and the one-feature-one-branch workflow with review before merge to
master.

Mark project-setup tasks 1.1-1.3, 1.5 done; 1.4 (Native P/Invoke surface)
is the first feature branch.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

AGENTS.md

@@ -0,0 +1,96 @@
+# AGENTS.md
+
+This file gives rules to an AI agent that works in this repository.
+The text uses ASD-STE100 Simplified Technical English.
+Write short sentences. Use the active voice. Give one instruction in each sentence.
+
+## 1. Purpose
+
+WhiteMagic is a .NET 8 library for Windows.
+The library reads and writes the memory of another process.
+The library also injects code, hooks functions, and calls remote functions.
+The target process is a game client (WoW 3.3.5a).
+
+## 2. Repository layout
+
+- `WhiteMagic/` — the library. Write the product code here.
+- `WhiteMagicTest/` — the xUnit test project. Write the tests here.
+- `openspec/` — the design documents. Read these before you write code.
+- `docs/` — the reference study `memory-library-comparison.md`.
+- `reference/` — four older libraries. Git ignores this folder. Read these for study only. Do not build these projects. Do not reference these assemblies.
+
+## 3. Build and test
+
+Run each command from the repository root.
+
+- Build the solution: `dotnet build WhiteMagic.slnx`
+- Run the tests: `dotnet test WhiteMagicTest/WhiteMagicTest.csproj`
+
+The build must show zero errors and zero warnings.
+`TreatWarningsAsErrors` is on. A warning stops the build.
+
+## 4. Code rules
+
+- Target framework: `net8.0-windows`.
+- Enable nullable reference types. Do not disable nullable.
+- Enable unsafe blocks only where a pointer dereference needs them.
+- Keep the library bitness-agnostic. Support x86 and x64.
+- Use `LibraryImport` for a new P/Invoke declaration. Do not use `DllImport` for new code.
+- Match the style of the code near your change.
+
+## 5. Test-first rule
+
+Write the test before you write the product code.
+
+Do these steps in order:
+
+1. Write a test that fails.
+2. Write the smallest code that makes the test pass.
+3. Clean the code. Keep the test green.
+
+Test all pure logic. Pure logic includes the assembler bytes, the marshal cache, the pattern matcher, the stub builder, and the pump queue.
+A test that needs a live process is an integration test. Gate an integration test on an available target.
+
+## 6. Design source
+
+The plan lives in `openspec/changes/whitemagic-foundation/`.
+
+- Read `proposal.md` for the goal.
+- Read `design.md` for the decisions.
+- Read `tasks.md` for the ordered task list.
+- Read the file in `specs/` that matches your feature. Each requirement uses SHALL. Each scenario uses WHEN and THEN.
+
+Make the code agree with the specification.
+If you must change the plan, update the specification first.
+Validate the change: `openspec validate whitemagic-foundation --strict`.
+
+## 7. Branch and review workflow
+
+The team builds one feature at a time.
+
+Obey these rules:
+
+1. Make one branch for one feature. Name the branch `feature/<short-name>`.
+2. Start the branch from `master`.
+3. Write the tests and the code on the branch.
+4. Keep the build green on the branch.
+5. Request a review before a merge.
+6. Do not merge your own feature without a review.
+7. Merge to `master` only after the review passes.
+8. Delete the feature branch after the merge.
+
+`master` must always build. `master` must always pass the tests.
+
+## 8. Commit rules
+
+- Write a clear commit message. Use the present tense.
+- Describe what the commit changes. Describe why the commit changes it.
+- Make a small commit for one logical change.
+- Do not commit build output. Git ignores `bin/` and `obj/`.
+
+## 9. Scope limits
+
+- Do not add WoW offsets to the library. The consumer holds the offsets.
+- Do not add bot logic to the library.
+- Do not add anti-cheat evasion.
+- Add the optional Iced backend only behind the `IAssembler` seam. Keep the default backend free of a third-party dependency.