Describe the definition of done generically in the distributed docs

CLAUDE.md and the task template recited pytest / lint-imports /
frontend as *the* definition of done in core-owned text; both now say
'the project's configured checks' and point at the checks file. Bench's
own local/CLAUDE.md records that its definition of done is the stdlib
suite, kept in the checks file beside it.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

manager/local/CLAUDE.md

@@ -3,3 +3,7 @@
 This file is yours — updates never touch manager/local/. Put here what an
 agent or teammate needs that the core doc cannot know: post-merge chores,
 what the driver assumes, what each local command is for.
+
+Bench's definition of done is `python3 -m unittest` and nothing else; the
+`checks` file beside this one is what the Focus view's CHECKS panel shows
+for this project.