Problem
The product wedge is not merely cross-session transport. A useful proactive
handoff must remain durable without silently steering a busy receiver, and the
new delegated objective must not lose to stale pre-delegation context after a
restart, compaction, or short follow-up.
The deterministic demo proves that a running receiver can retain a pending
checkpoint offer with zero steer, interrupt, or native-turn starts. A real
Codex active-target observation and durable context-epoch behavior are still
missing.
Outcome
A handoff becomes a durable attention item first. The receiving session admits
it at a safe checkpoint, preserves the admitted objective across lifecycle
changes, and never silently resumes a superseded objective.
Acceptance criteria
- Use queue or checkpoint-offer as the default for a busy receiver; steer is an
explicit, separately authorized mode only.
- Cover real Codex targets that are running and temporarily unavailable. The
current turn is neither interrupted nor overwritten.
- Bind an admitted handoff to the exact task incarnation, objective epoch,
checkpoint, adapter reference, and freshness snapshot.
- Preserve that admitted objective through compaction, restart, and a short
follow-up; stale prior context must reject or request clarification rather
than silently becoming authoritative.
- Reopen and explicitly re-inspect the pending active-receiver item after
restart, then admit it exactly once when the receiver becomes eligible.
- Preserve pending attention across app reload and expose it exactly once in
the inspector.
- Keep stale, irrelevant, muted, and unsubscribed events at zero native turns.
- Fail closed with a typed result when a harness cannot provide the required
checkpoint or freshness semantics; never degrade to an untracked raw message.
- Retain exact restart, duplicate, native-turn, disposition, and cleanup
evidence.
Order and non-goals
The native busy-target observation belongs in the #91 live validation. The
remaining product surface is P1 immediately afterward. This issue does not
implement Codex writer takeover, replace the harness queue, or add autonomous
interrupt behavior.
Community evidence
Related ThreadMesh gate: #91.
Problem
The product wedge is not merely cross-session transport. A useful proactive
handoff must remain durable without silently steering a busy receiver, and the
new delegated objective must not lose to stale pre-delegation context after a
restart, compaction, or short follow-up.
The deterministic demo proves that a running receiver can retain a pending
checkpoint offer with zero steer, interrupt, or native-turn starts. A real
Codex active-target observation and durable context-epoch behavior are still
missing.
Outcome
A handoff becomes a durable attention item first. The receiving session admits
it at a safe checkpoint, preserves the admitted objective across lifecycle
changes, and never silently resumes a superseded objective.
Acceptance criteria
explicit, separately authorized mode only.
current turn is neither interrupted nor overwritten.
checkpoint, adapter reference, and freshness snapshot.
follow-up; stale prior context must reject or request clarification rather
than silently becoming authoritative.
restart, then admit it exactly once when the receiver becomes eligible.
the inspector.
checkpoint or freshness semantics; never degrade to an untracked raw message.
evidence.
Order and non-goals
The native busy-target observation belongs in the #91 live validation. The
remaining product surface is P1 immediately afterward. This issue does not
implement Codex writer takeover, replace the harness queue, or add autonomous
interrupt behavior.
Community evidence
Related ThreadMesh gate: #91.