Add AGENTS.md for coding agents

AGENTS.md

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+# Shimmer-Labview-API
+
+LabVIEW support for Shimmer devices. **This repo is mid-migration**, and that shapes almost every
+decision in it.
+
+## The migration
+
+LabVIEW support is moving onto a **new wrapper built over the core C# API** (`Shimmer-C-API`). The
+old LabVIEW API is being retired and existing users have to migrate onto the wrapper.
+
+The stated reason, from `Readme.md`: the C# API is widely used across research, industry and Shimmer's
+own internal tools, so it is the most heavily developed and tested. Aligning LabVIEW to it gives
+consistent behaviour and faster fixes rather than a second parallel implementation to maintain.
+
+**The practical consequence:** this is a wrapper, not an implementation. A parsing, protocol,
+calibration or timestamp fix belongs in `Shimmer-C-API` — fix it there and it reaches LabVIEW users
+through the bridge. Reimplementing that logic here would recreate exactly the divergence the
+migration exists to remove.
+
+```
+ShimmerLabviewC#Wrapper/   ShimmerBridge.cs, ShimmerLVWrapper.sln/.csproj — the C# bridge
+ShimmerLabview/            Bin/, Examples/ — the LabVIEW side
+```
+
+The wrapper uses `packages.config`-style NuGet, so restore behaves differently from the
+`PackageReference` projects elsewhere in `C:\dev\csharp\`.
+
+## Before changing anything here
+
+Check whether the change belongs in `Shimmer-C-API` instead. If it does, make it there; if it is
+genuinely bridge-specific — marshalling, LabVIEW type mapping, the VI surface — it belongs here.
+Say which you concluded and why, because the answer is not obvious from inside this repo.
+
+Anything documenting the *old* LabVIEW API is being retired: prefer updating the wrapper's story over
+extending the legacy one.

CLAUDE.md

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+@AGENTS.md
+
+<!--
+This file exists only so Claude Code picks up AGENTS.md.
+
+Recent Claude Code versions read AGENTS.md directly, but only when no CLAUDE.md
+is present at or above the working directory — and support is unavailable on
+older versions, on third-party providers such as Amazon Bedrock, and with
+telemetry or hooks disabled. This one-line import makes AGENTS.md reach every
+session regardless: https://code.claude.com/docs/en/memory
+
+Put shared agent instructions in AGENTS.md — the vendor-neutral convention that
+Cursor, Copilot, Codex and others read directly. Only genuinely Claude-specific
+instructions belong in this file, below the import.
+
+A symlink would also work, but creating one on Windows needs Administrator
+privileges or Developer Mode, so the import is the portable choice for this team.
+-->