fix: regenerate the stale avp_pb2 so import avp works with the protobuf 5.x runtime

CHANGELOG.md

@@ -4,6 +4,16 @@ All notable changes to the AVP Python SDK are documented in this file.
 
 Format follows [Keep a Changelog](https://keepachangelog.com/). Versions follow [Semantic Versioning](https://semver.org/).
 
+## [Unreleased]
+
+### Changed
+
+- **Minimum `protobuf` raised to `>=5.29`** (from `>=4.21`) to match the regenerated gencode. Environments pinned to `protobuf` 4.21–5.28 must upgrade; protobuf 4.x is end-of-life.
+
+### Fixed
+
+- **Protobuf gencode/runtime mismatch** — the checked-in `avp_pb2.py` carried gencode 6.31.1, whose runtime guard rejects any `protobuf` older than 6.31.1, while `pyproject.toml` required only `>=4.21`. Every environment constrained below 6.31.1 failed at `import avp`, including `avp[all]`, where `autogen-core` requires `protobuf~=5.29.3`. Regenerated with protoc 5.29 (gencode 5.29.0). `grpcio-tools` is pinned to `>=1.71.2,<1.72` (1.72+ needs `protobuf>=6.30`, which cannot coexist with `autogen-core`'s pin) so a later `make proto` cannot reintroduce the mismatch. Also drops the dead `EMBEDDING` value that v0.5.0 removed from `proto/avp.proto` but never from the generated module.
+
 ## [0.6.2] - 2026-04-26
 
 ### Added

Makefile

@@ -1,5 +1,8 @@
 .PHONY: proto test lint clean install
 
+# Regenerate avp_pb2.py. Keep grpcio-tools on the 5.29 gencode line
+# (>=1.71.2,<1.72): the autogen extra pins protobuf to 5.29.x, so a
+# newer protoc would emit gencode the runtime refuses to load.
 proto:
 	python -m grpc_tools.protoc \
 		-I proto \

pyproject.toml

@@ -23,7 +23,7 @@ classifiers = [
 
 dependencies = [
     "numpy>=1.24",
-    "protobuf>=4.21",
+    "protobuf>=5.29",
     "zstandard>=0.21",
 ]
 
@@ -57,7 +57,10 @@ dev = [
     "pytest>=7.0",
     "pytest-asyncio>=0.21",
     "ruff>=0.1",
-    "grpcio-tools>=1.59",
+    # Keep protoc on the 5.29 gencode line. grpcio-tools 1.72+ targets
+    # protobuf>=6.30 (1.84+ targets >=7.35.1), neither of which can coexist
+    # with autogen-core's protobuf~=5.29.3.
+    "grpcio-tools>=1.71.2,<1.72",
 ]
 
 [project.entry-points."vllm.general_plugins"]