March 2025 monthly summary for lf-lang/lingua-franca focusing on delivering robust TypeScript code generation for network components and improving overall system reliability.

January 2025 highlights for lf-lang: Delivered federated-execution enhancements, stabilized semantics, improved observability, and aligned dependencies across core repos. Key work focused on lf-lang/reactor-c and lf-lang/lingua-franca with concrete commits that improve reliability, performance, and developer experience. Accomplishments by area: - Federated Next Event Tag handling and logging improvements: Ensure NET is sent when DNET is disabled and improve logging for NETs in the federated execution module (commits 05f5acc9, e22ca8d1). - LTC/TAG optimization toggle and rollback: Temporarily disable LTC and TAG optimizations and revert to original LTC behavior to preserve federated execution semantics (commits 463d4905, d32b2255). - CLI usage clarity: Update dnet flag text to --disable_dnet for clearer CLI usage (commit df786d36). - Wait/Timing optimization in reactor_threaded.c: Improve wait_until timing for short durations and optimize waits, including busy-wait for sub-min sleep durations and refining target time checks (commits fd7bd222, 184b55f0b5a846ae839f57bc4e3e319268eeb15a, f9081b172cc47f8a0e35cf8bd0f46258bd599a5b, 98b1090c0edd70abe2f7f257ebf3ec55f8843888). - Lingua-Franca dependency alignment: Update reference to lingua-franca master to keep dependencies aligned (commit 31d28e2e). - Dependency alignment across stack: Update reactor-c submodule to stable commits and align with lingua-franca (commits 874bceaa1033d162fa685bed196ecc75cb20d7be, 4a2541ce94e17cb7c9b73ee0c2bd88ac9e4750c5) and update reactor-ts dependency to latest compatible version (commit aa0f12021e2b04b28421ac01c25647409a61c1b1). - DNET warning mechanism in C extension: Emit a warning when DNET is enabled and a physical action is present to alert about potential lag (commit 0d772cd61c2f4adfdb2cc950110067cd24aebc05). Impact: - Improved reliability and observability in federated execution, with clearer CLI usage and reduced risk of lag under DNET-enabled scenarios. - Faster, more predictable federated runs due to timing optimizations and correct semantics when LTC/TAG optimizations are toggled. - Streamlined maintenance with synchronized dependency versions across reactor-c, lingua-franca, and reactor-ts. Technologies/skills demonstrated: - C/C++ performance tuning and thread timing, logging improvements, and feature toggles. - Submodule and dependency management across multiple repositories. - Observability enhancements and user-focused CLI UX improvements.

October 2024: Stability and correctness improvements for lf-lang/reactor-c focusing on federated RTI DNET analysis; delivered a critical bug fix that enhances accuracy and inter-node timing.