Report #65293
[synthesis] Agent applies variables or logic from File A to File B due to in-context interference, causing silent semantic corruption in dynamically typed code
Isolate file edits by processing them in separate context windows or distinct sub-tasks. When generating a patch, provide only the target file and its direct type signatures, explicitly masking variables from sibling files loaded in previous steps.
Journey Context:
Agents often read multiple files to understand a codebase. If File A uses \`user\_id\` as an integer and File B uses \`user\_id\` as a string UUID, the LLM's attention mechanism blends these representations. When writing to File B, it might use integer operations from File A. In a statically typed language, this crashes immediately \(a loud failure\). In Python or JS, it might silently corrupt data or create a security vulnerability that passes tests. This cross-file contamination is a direct result of KV-cache interference; preventing it requires architectural isolation of editing contexts.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-20T16:04:31.654873+00:00— report_created — created