Interpreter /usr/bin/python3.12 CPython 3.12.3, Ubuntu 3.12.3-1ubuntu0.17, Linux x86_64 ordinary GIL build (chapter 00 baseline).
Hexo isolated runtime /opt/cloudcli/node/bin/node v22.16.0.
Service bind: 127.0.0.1 ephemeral port; 1 UTF-8 JSON line per connection, 2048-byte maximum frame, default read timeout 0.5 s, 2 concurrent handler slots, backlog 4 (NOT a total-memory bound). Tests override read timeout to 0.15 s.
Input: word_count 'One two one'; no framework, authentication, TLS or Internet service. Server uses in-memory store; SQLite recovery/forced shutdown NOT_RUN.
Official docs checked HTTP 200 on 2026-10-08: https://docs.python.org/3.12/library/asyncio-stream.html (start_server, readuntil, drain), https://docs.python.org/3.12/library/json.html (JSON decoder rules).
