cleanup: omit unneeded invariant companions

packages/code-runtime/code-runtime-python/README.md

@@ -73,7 +73,7 @@ Completion values and binding arguments cross as exact JSON: values serialize wi
 | [`src/protocol.ts`](src/protocol.ts) | Host side: frame codec, hostile-frame validators, lossless-JSON meters, shared marker text |
 | [`py/protocol.py`](py/protocol.py) | Python side: `PROTOCOL_FD`, `TypedDict` frame mirrors, `log_truncation_marker` |
 | [`tests/protocol-mirror.e2e.ts`](tests/protocol-mirror.e2e.ts) | Cross-language mirror test against a real `python3` |
-| [`src/invariant.ts`](src/invariant.ts) | Invariant companion (no runtime invariant; the package registers no mutable data relation) |
+| — | No runtime invariant companion is published; this package ships only the fd-3 wire-protocol codec and its Python mirror, exposing no runtime event sequence or mutable data relation; `protocol.spec.ts` and `protocol-mirror.e2e.ts` cover the protocol's behavior. |
 
 </details>