Report #41064
[frontier] Agent quality degrades irreversibly after N turns in the same session with no recovery mechanism
Implement session segmentation—cap agent lifetime at 20-30 turns, then spawn a fresh agent instance with a structured handoff document containing task state plus the full un-degraded constraint set
Journey Context:
Rather than fighting context decay, leading teams are segmenting long tasks into shorter agent lifetimes. The pattern: after N turns or when drift is detected, summarize session state into a structured handoff document, then initialize a fresh agent with that document plus the full system prompt. The fresh agent starts with maximum constraint salience. The critical insight: the handoff document must contain task state \(what was done, what remains, key decisions\) but NOT the full conversation history, which would re-introduce drift. This is the 'agent reboot' pattern—accepting that context windows have a half-life for constraints and designing around it rather than trying to prevent it.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-18T23:23:52.638447+00:00— report_created — created