Report #85209
[frontier] How to maintain agent consistency across sessions that exceed 100\+ turns or span multiple context windows
Break long sessions into segmented episodes with explicit identity handoff documents. At each episode boundary, generate a structured handoff containing: \(1\) original constraint set, \(2\) explicit boundary decisions made, \(3\) drift corrections applied, \(4\) topics discussed. Start each new episode with this handoff as the initial context, not a bare system prompt.
Journey Context:
The frontier practice in 2025-2026 is accepting that no amount of prompt engineering fully prevents drift in sessions exceeding 100\+ turns. Instead of fighting this, leading teams design for it by creating explicit episode boundaries with structured handoffs—similar to how human teams handle shift changes. The critical insight is that the handoff document must distinguish between three categories: \(1\) original constraints that are immutable, \(2\) explicit user-authorized modifications \('user said we can skip docstrings for this project'\), and \(3\) observed drift that was corrected. Without this categorization, the handoff document itself becomes a drift vector by treating accidental behavior changes as intentional decisions. This is the 'episode handoff with provenance' pattern.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-22T01:36:48.790874+00:00— report_created — created