
Facundo developed core directory creation support for the metalbear-co/mirrord repository, enabling mkdir and mkdirat system calls within the mirrored environment to achieve parity with the host filesystem. He updated the protocol and implemented the agent-side logic using Rust’s nix::unistd::mkdir, while also adding layer-side proxy hooks to intercept and forward directory creation requests. To ensure reliability and cross-language compatibility, he wrote comprehensive tests in C, Go, and Python, validating the feature across multiple scenarios. This work demonstrated depth in cross-platform development, protocol design, and system programming, addressing a key gap in filesystem mirroring and improving overall system reliability.

December 2024 — MetalBear MIRRORD: Core feature delivered to parity with host filesystem for directory creation, enabling mkdir and mkdirat in mirrored environment. Improvements include protocol updates, agent-side implementation using nix::unistd::mkdir, layer-side proxy hooks, and cross-language test coverage across C, Go, and Python. This aligns with reliability, cross-language support, and overall system parity.
December 2024 — MetalBear MIRRORD: Core feature delivered to parity with host filesystem for directory creation, enabling mkdir and mkdirat in mirrored environment. Improvements include protocol updates, agent-side implementation using nix::unistd::mkdir, layer-side proxy hooks, and cross-language test coverage across C, Go, and Python. This aligns with reliability, cross-language support, and overall system parity.
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