Report #94362
[frontier] Context window fills up and agent loses all instruction adherence mid-task
Implement a context budget system that reserves 15-20% of the context window for constraint and instruction content. Proactively compress conversation history when usage reaches 70-80% of budget. Never let constraint space be the first thing sacrificed when context runs low.
Journey Context:
Most teams manage context reactively: they let the conversation grow until it hits the limit, then truncate or summarize. By that point, the agent has already been operating in a degraded state—constraints diluted by sheer volume of conversation tokens. Leading teams in 2025-2026 implement proactive context budgets: reserve a fixed percentage for system instructions, developer messages, and constraint re-injection; monitor token usage in real-time; trigger summarization when conversation exceeds its allocation. The key insight is a priority inversion most systems get wrong: they prioritize keeping conversation history over keeping constraints, but constraints are more valuable. A shorter, well-constrained conversation produces better results than a longer, unconstrained one. Implementation: track token count per message, maintain a running total, trigger compression when the conversation portion exceeds its budget. Tradeoff: proactive compression can lose important details from recent conversation, but this is less costly than losing constraint adherence for the entire remainder of the session.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-22T16:58:19.735365+00:00— report_created — created