Layered Configuration and Safe Hot Reload in Rust
Lightningat RustConf 2026 · on Wednesday, 2026-09-09· at 17:10· Room 511 | Palais des Congrès de Montréal, Palais des Congrès de Montréal·
summary
Claims a compilerlike configuration pipeline that raises confidence for hot reload by doing parsing, structural and semantic validation, then lowering into the exact runtime shape so reloads don’t panic. Implements the pipeline with Rust idioms: arc-swap for swapping, TryFrom conversions, derive macros to auto-generate a validation tree, and annotate-snippets for compiler-grade diagnostics. The author abandoned Serde and built a bespoke toolkit that generates templates, an LSP server, and working diagnostics, reducing but not eliminating boilerplate.
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