Migrate protobuf layer to @teslemetry/tesla-protocol (ts-proto API)

AGENTS.md

@@ -0,0 +1,16 @@
+# Project agent memory
+
+This file is the project's committed home for project-intrinsic agent knowledge: build, test, release, architecture, and sharp-edge notes that should travel with the code.
+
+- Add durable project-specific notes here as they are discovered through real work.
+- Tesla protobuf types (`RoutableMessage`, `vcsec`, `car_server`, `signatures`, `keys`, ...) come from the published `@teslemetry/tesla-protocol` package (subpaths like `@teslemetry/tesla-protocol/command/signatures`), not a bundled `src/pb2`. It is ts-proto generated: plain-object messages with `Type.create(partial)` / `Type.encode(msg).finish()` / `Type.decode(bytes)`, not the old `google-protobuf` `.setX()`/`.serializeBinary()` style.
+- `tsconfig.json` must keep `"module": "NodeNext"` / `"moduleResolution": "NodeNext"`. Dependencies like `@teslemetry/tesla-protocol` gate access behind a package.json `exports` map with per-subpath types; classic/ESNext resolution can't see those subpaths and every scoped-package import (even `@types/node` internals) fails to resolve.
+- There is no test suite yet; `pnpm install` (which runs `tsc` via the `prepare` script) is the whole CI gate. Run `npx tsc --noEmit` to typecheck without emitting.
+- `VehicleSigned` (`src/vehiclesigned.ts`) mostly delegates commands straight to the cloud HTTP parent rather than building and dispatching signed protobuf `RoutableMessage`s itself - the `Session`/HMAC scaffolding exists but the signed-command transport seam is unfinished. Its `Session` class is the only current protobuf call site in the library.
+
+## Maintaining this file
+
+Keep this file for knowledge useful to almost every future agent session in this project.
+Do not repeat what the codebase already shows; point to the authoritative file or command instead.
+Prefer rewriting or pruning existing entries over appending new ones.
+When updating this file, preserve this bar for all agents and keep entries concise.

CLAUDE.md

@@ -0,0 +1 @@
+AGENTS.md

package.json

@@ -8,9 +8,8 @@
         "url": "https://teslemetry.com"
     },
     "devDependencies": {
-        "@types/node": "^20.12.12",
-        "ts-protoc-gen": "^0.15.0",
-        "typescript": "^5.4.5"
+        "@types/node": "^24.13.3",
+        "typescript": "^5.9.2"
     },
     "scripts": {
         "prepare": "tsc",
@@ -29,6 +28,6 @@
     "main": "dist/index.js",
     "license": "Apache-2.0",
     "dependencies": {
-        "google-protobuf": "^3.21.4"
+        "@teslemetry/tesla-protocol": "^0.5.0"
     }
 }