Reflections on two years of writing Rust:
miniblog.
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It's confusing how 'REPL' refers to two different UIs:
A CLI like IPython or Julia, where things like multiline editing and syntax highlighting need careful implementation.
An editor protocol like SLIME or CIDER where multiline editing is a total non-issue.
I've realised that AGENTS.md / CLAUDE.md solve two distinct problems:
* It tells the LLM the conventions of the project, avoiding follow-up prompts.
* It precomputes a summary of the project, saving a bunch of searches at the start of a session.
Further tinkering with diagnostics, following feedback!
* Two lines of context above and below now.
* The caret is included in the line below where possible.
* Syntax highlighting of keywords.
I kinda feel that smart context sizing would be better. What do you think so far?

