Notes on language design, capabilities, contracts, and what changes when LLMs write systems code.https://fastc.skelfresearch.com/en-ushttps://fastc.skelfresearch.com/blog/evolution-06-fastc-core-the-curated-ecosystem/https://fastc.skelfresearch.com/blog/evolution-06-fastc-core-the-curated-ecosystem/Walking through the 11 packages of the fastc-core ecosystem, the v1.0.x cutover, and why we don't want 11 competing JSON libraries.Sat, 06 Jun 2026 00:00:00 GMThttps://fastc.skelfresearch.com/blog/llm-c-recurring-bugs/https://fastc.skelfresearch.com/blog/llm-c-recurring-bugs/The bug shapes we see over and over when an agent generates C, and which of them fastC structurally prevents, converts into a build-time trap, or simply makes louder.Thu, 04 Jun 2026 00:00:00 GMThttps://fastc.skelfresearch.com/blog/reading-fastc-vs-c/https://fastc.skelfresearch.com/blog/reading-fastc-vs-c/A column-by-column tour. If you can read C, you can read fastC in twenty minutes — but the things that look the same do not always mean the same thing.Sat, 30 May 2026 00:00:00 GMThttps://fastc.skelfresearch.com/blog/agent-friendly-language-design/https://fastc.skelfresearch.com/blog/agent-friendly-language-design/"Designed for LLMs" sounds like marketing. It is not. Here is the concrete list of language-design choices that change when the modal author of code is a stochastic process.Fri, 22 May 2026 00:00:00 GMThttps://fastc.skelfresearch.com/blog/evolution-05-v13-and-the-agent-tooling-layer/https://fastc.skelfresearch.com/blog/evolution-05-v13-and-the-agent-tooling-layer/Stage 1.3 annotations, the v1.0.x close-out — `fastc fix` / `context` / `diff`, expanded MCP, the unified diagnostic envelope.Fri, 15 May 2026 00:00:00 GMThttps://fastc.skelfresearch.com/blog/evolution-04-supply-chain-and-cross-compile/https://fastc.skelfresearch.com/blog/evolution-04-supply-chain-and-cross-compile/Stages 1.7 + 1.9 + the v2.0 hardening — sha256, cosign keyless, SLSA L3, eight cross-compile targets, compiler-binary reproducibility.Fri, 10 Apr 2026 00:00:00 GMThttps://fastc.skelfresearch.com/blog/evolution-03-capabilities-and-contracts/https://fastc.skelfresearch.com/blog/evolution-03-capabilities-and-contracts/Stages 1.4 + 1.5 + 2.1 — how fastC's two non-Rust safety claims were built.Sun, 08 Mar 2026 00:00:00 GMThttps://fastc.skelfresearch.com/blog/evolution-02-stages-0-and-1-the-core/https://fastc.skelfresearch.com/blog/evolution-02-stages-0-and-1-the-core/How fastC's rust harness, safety core, type system, traits, generics, and stdlib MVP got built — six months of foundational work.Thu, 12 Feb 2026 00:00:00 GMThttps://fastc.skelfresearch.com/blog/evolution-01-from-c-to-fastc/https://fastc.skelfresearch.com/blog/evolution-01-from-c-to-fastc/fastC's foundational thesis — what wedge it takes against C, Rust, Zig, and Go.Thu, 15 Jan 2026 00:00:00 GMT