address copilot review

CLAUDE.md

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+# Claude Code instructions
+
+> **TL;DR**
+> | | |
+> |---|---|
+> | Local tests | `./bin/run-tests.sh` (exit 0 GREEN · 1 RED · 2 AMBER · 3 FILTERED) |
+> | Hardware tests | `./mcp-server/run-tests.sh` |
+> | Format | `trunk fmt` |
+> | Mirror docs | `.github/copilot-instructions.md` (canonical) · `AGENTS.md` |
+>
+> **Need this? It's here.**
+> | | |
+> |---|---|
+> | General helpers (clamp, UTF-8, string fmt…) | `src/meshUtils.h` |
+> | Logging macros (LOG_DEBUG / INFO / WARN…) | `src/DebugConfiguration.h` |
+> | New module skeleton | inherit `ProtobufModule<T>` in `src/mesh/ProtobufModule.h` |
+> | Observer / event wiring | `src/Observer.h` |
+
+**Read `.github/copilot-instructions.md` first.** That file is the canonical agent-facing document for this repo. It covers project layout, coding conventions, the build system, CI/CD, the native C++ test suite, and the MCP Server & Hardware Test Harness. Read it top-to-bottom before starting any non-trivial change.
+
+This file (`CLAUDE.md`) is a short pointer for Claude Code sessions. Slash commands live in `.claude/commands/`.