Baseline interpreter: /usr/bin/python3.12, CPython 3.12.3, Ubuntu 3.12.3-1ubuntu0.17; build and source SHA frozen by chapter 00.
Kernel/platform: Linux 5.10.134-013.16.kangaroo.al8.x86_64 x86_64 glibc 2.39; GCC 13.3.0; ordinary GIL build (not a free-threaded test).
Node used for isolated Hexo pages: /opt/cloudcli/node/bin/node v22.16.0.
Input: word_count task 'One two one'; cpu_work iterations=20000 (same chapter 27/29/30 input). No performance measurement or cross-platform claim.
Docs checked via HTTP 200 on 2026-10-08: https://docs.python.org/3.12/library/asyncio-task.html and https://docs.python.org/3.12/library/asyncio-sync.html (coroutine objects, Task scheduling, cooperative waits, Event).
Async cancellation/group/timeout stress, full-site Hexo build, installed new wheel: NOT_RUN in this chapter.
