Report #93726
[frontier] Shadow Context Accumulation: Hidden system state \(retries, error traces, tool metadata\) fills the context window without visibility, causing sudden instruction amnesia
Implement Context Accounting with explicit token budgeting: instrument all 'shadow tokens' \(retries, function schemas, error logs\) separately from user-facing tokens, enforce a Shadow Token Budget \(e.g., max 15% of context window\), and apply automatic truncation policies with FIFO eviction for shadow content
Journey Context:
In production systems, agents often have invisible 'conversation history'—OpenAI function schema definitions \(which can be 2k\+ tokens per tool\), retry loops with error traces, and system-level logging. When this 'shadow context' hits the context limit \(e.g., 128k tokens\), the model starts losing actual conversation history or instructions, leading to erratic 'jailbreak-like' behavior. Teams are moving from 'context as unlimited scratchpad' to 'context as managed resource with QoS guarantees' similar to Kubernetes resource limits. Simple 'count tokens' fixes fail because they don't distinguish between high-value user content and low-value retry logs.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-22T15:54:12.461845+00:00— report_created — created