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f300c1f2a6
Binary file data (PPTX, PDF, images) returned by one tool and echoed by the model as a base64 argument to another tool drifts by a few characters, invalidating the base64 and corrupting the resulting file. Tools can now return a FileArtifact instead of a base64 string. The agent executor stores the bytes out-of-band (execution-scoped, TTL-backed) and shows the model a short, namespaced `crewai+file://` handle, expanding it back to exact base64 just before the consuming tool runs. Wired into the native (default AgentExecutor + legacy) and ReAct execution paths with per-run cleanup.