Unit tests (T1): the grammar, the input table, the records, the frames

Row T1 of testing-plan.md § Evidence plan. Run at the PR's head on 2026-09-19, in this repository's cli/ with uv.

Command

cd cli && uv run python -m pytest -q tests/test_channels_mentions.py tests/test_channels_verbs.py tests/test_collaborators.py tests/test_workchannels.py tests/test_channels.py

Outcome

Files	Result	Duration
test_channels_mentions.py (manifest, probe, the two record shapes, the two frames, the status lines, the threads column), test_channels_verbs.py (strip_mention, parse_verb, compose_keyword, help_text), test_collaborators.py (CollaboratorRecord.slack, parse_subjects, slack_ids, fail-closed from_dict), test_workchannels.py (listen, the two-value guard, add(listen=)), test_channels.py (the channel, the ledger, channels threads)	234 passed	0.84 s

The whole suite under make check (T12, checks.md): 4127 passed, 1 skipped.