MDL

Write and review production Rust using the official API Guidelines, Style Guide, and this engineering standard: allocation contracts, ownership, Result vs panic, debug_assert, Clippy, tests, rustdoc, unsafe, and Cargo CI. Use when writing, reviewing, or refactoring Rust; choosing borrow vs clone; designing crate APIs; handling errors; bounding heap use; configuring clippy or rustfmt; or when the user runs /rust-best-practices. Do not use for other languages. Triggers: rust, rustc, cargo, clippy, rustfmt, ownership, clone, borrow, Result, unwrap, expect, panic, thiserror, anyhow, heapless, no_std, allocation, debug_assert, type-state, Send, Sync, unsafe, FFI, rustdoc, MSRV, rust-best-practices, rust style, rust guidelines

Updated 16 days ago

Use Nerd Fonts (nerdfonts) glyphs for icons in CLI output, TUIs, shell prompts, statuslines, editor and terminal configs, docs, and web pages. Pick a named glyph from the 10,995 on nerdfonts.com/cheat-sheet (nf-md-, nf-fa-, nf-dev-, nf-oct-, nf-cod-, nf-seti-, nf-pl-), verify the codepoint, and install a patched font from nerdfonts.com/font-downloads. Use when adding or fixing terminal or editor icons, tofu or empty boxes instead of icons, starship, powerlevel10k, oh-my-posh, tmux, lualine, nvim-tree, or a Nerd Font install, even if the user does not say nerd fonts. Do not use for Lucide, Heroicons, Tabler, Iconify SVGs, or Google Fonts pairings. Also: Nerd Font Mono vs Propo, brew, scoop, choco, font-patcher. Triggers: icon, glyph, nerd font, nerdfonts, powerline, starship, powerlevel10k, oh-my-posh, tmux status, lualine, nvim-tree, devicons, tofu, boxes instead of icons, terminal font, editor font, codepoint, font-patcher, emoji, icon font, file icons, statusline icons.

Updated 20 days ago

Decompose dense codebase-wide, multi-document, PDF, and aggregation work even when the input fits the context window, following Recursive Language Models (Zhang, Kraska, Khattab, 2025). Use when the user asks to analyse all files, a whole repo, all docs, large PDFs, or to aggregate or multi-hop across scattered sources. Skip one file, one function, a single needle, or a one-page PDF conversion. Triggers: long context, context rot, large codebase, many files, all files, big document, multi-document, PDF, aggregate, summarize everything, codebase-wide, multi-hop, recursive, sub-agents, map-reduce.

Updated 20 days ago