Today (2026-05-13 10:30 IDT) a recurring daily-digest task fired on
time but produced no output. Unlike the 2026-05-11 incident (which
was the SDK auto-compacting the task prompt away — see PR nanocoai#2411 on
upstream/main), today no compaction happened. The agent saw the
<task> block, mis-read its row-insertion timestamp as the scheduled
fire time, conflated it with yesterday's manual-recovery delivery,
and explicitly logged "Sending again would be a duplicate. Skipped"
before ending the turn. markCompleted ran, next recurrence scheduled
for tomorrow, container sat idle until the absolute-ceiling kill.

Three coordinated changes:

1. formatter: expose `scheduled_for` on <task> blocks, populated from
   `process_after`. The existing `time` attribute reflects the row's
   insertion timestamp (often the previous fire), which today's agent
   read as the scheduled fire time. Keeping `time` for back-compat
   and adding `scheduled_for` removes the ambiguity.

2. scheduling.instructions.md: add a "When a scheduled task fires"
   section telling the agent each fire is independent, the scheduler
   guarantees no duplicates, and prior conversation history about
   late-delivered earlier fires is never about the current one.

3. compact-instructions.ts: extend the PreCompact custom-instructions
   so the compaction summarizer preserves the <task> body verbatim
   when the latest input is a task. This is the architectural analog
   of upstream PR nanocoai#2411 — that branch's push-after-compact mechanism
   was removed in PR nanocoai#2412, replaced with this PreCompact-driven
   approach.

Tests: new `formatTaskMessage` describe block with two cases —
distinct timestamp vs scheduled_for, and null process_after fallback.
91/91 agent-runner tests pass.

Container source is bind-mounted (-v container/agent-runner/src:/app/src:ro)
so no image rebuild is needed — next container spawn picks up the change.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

…ination-reminder

revert: remove compaction destination reminder (PR nanocoai#2327)

…ination-reminder

revert: remove compaction destination reminder (PR nanocoai#2327)