cron/scheduler.py no longer re-exports the split modules (scheduler_delivery /
_script / _prompt / _preflight); it imports only the 19 names it calls itself
(bottom-of-file, E402 kept for the import cycle). Dropped the shim-only
`import shutil` and the F401 note on windows_hide_flags (still used by
scheduler.py). Split modules now call same-module helpers directly, reach
sibling split modules via late-bound module refs (_delivery/_script/_preflight)
next to _sched, and import windows_hide_flags themselves; origin-resident names
(load_config, Path, _SCRIPT_TIMEOUT, heartbeat_run_claim, ...) still go through
_sched. Callers/tests import + patch the defining module.
build_session_key embeds the workspace segment (scope_id) in every Slack
dm/group/thread key, but both cron seed helpers built their SessionSource
without it: the seeded row keyed agent:main:slack:dm:<chat>:<thread> while
a real scoped reply keys agent:main:slack:dm:<team>:<chat>:<thread> — a
row no reply ever resolves to. DMs were rescued only incidentally by the
legacy-key claim-once migration; scoped channels/threads got continuation
amnesia, and identical channel ids in two workspaces could collide.
Capture HERMES_SESSION_SCOPE_ID into the cron origin (_origin_from_env —
the session-context var async_delegation already snapshots), add scope_id
to _seed_cron_thread_session/_seed_cron_channel_session, and pass the
origin's scope at all three seed call sites.
Tests: scoped dm-thread / channel-thread / flat-channel seed-vs-reply key
equality through the real build_session_key, plus a two-workspace
non-collision guard.
Live incident (Alice canary 2026-08-20, job 8e21a957b77b): the continuable
thread seed created its session with chat_type='thread', but a Slack DM
in-thread reply arrives chat_type='dm' and build_session_key routes DM
threads through the DM arm (...:dm:<chat>:<thread>). Seed row and reply row
never matched — the reply had no brief in context (continuation amnesia).
is_dm on _seed_cron_thread_session selects the seeded chat_type at both call
sites (opened-thread and the companion in_channel thread seed); channel
threads are unchanged. Sibling lane of the flat seed's is_dm fix. Tests pin
the key-equality contract: seeded key == the key the reply builds.
Teknium