Droo Stack

droo-stack

Concrete coding patterns for a polyglot stack. Each rule shows Incorrect and Correct examples with rationale. These complement CLAUDE.md (which sets high-level preferences) with detailed, actionable reference material.

What You Get

• Incorrect/Correct code examples with rationale for each language
• Patterns organized by impact level (critical, high, medium)
• Language-specific idioms: pipes, pattern matching, error handling, testing
• Complements CLAUDE.md preferences with concrete, actionable rules

When to use

This skill activates contextually when working in the languages below. Read the relevant rule file for the language you're working in.

Rules by impact

CRITICAL

• [go-errors](rules/go-errors.md) -- Error wrapping, errors.Is/errors.As, sentinel errors
• [rust-errors](rules/rust-errors.md) -- thiserror/anyhow, ? operator, From implementations
• [noir-patterns](rules/noir-patterns.md) -- Field vs integers, constrained/unconstrained, nargo tests

HIGH

• [elixir-patterns](rules/elixir-patterns.md) -- with chains, pipes, pattern matching in function heads
• [typescript-zod](rules/typescript-zod.md) -- Zod schemas, discriminated unions, safeParse
• [typescript-patterns](rules/typescript-patterns.md) -- Functional patterns, strict mode, error handling
• [go-testing](rules/go-testing.md) -- Table-driven tests, t.Run, t.Helper()
• [rust-patterns](rules/rust-patterns.md) -- Builder pattern, derive traits, clippy, iterators
• [c-patterns](rules/c-patterns.md) -- Memory ownership, const correctness, error codes, string safety
• [zig-patterns](rules/zig-patterns.md) -- Error unions, comptime generics, allocators, C interop, build.zig
• [python-cli](rules/python-cli.md) -- Typer scaffolding, pydantic models, pathlib, pytest
• [lua-modules](rules/lua-modules.md) -- Module pattern, metatables, LuaLS annotations
• [shell-patterns](rules/shell-patterns.md) -- Traps, getopts, [[ ]], quoting, set -euo pipefail

MEDIUM

• [elixir-testing](rules/elixir-testing.md) -- ExUnit patterns, real dependencies over mocks
• [python-patterns](rules/python-patterns.md) -- Type hints, f-strings, async, comprehensions
• [chezmoi-templates](rules/chezmoi-templates.md) -- Whitespace trimming, conditionals, run_onchange scripts

See also

• claude-api -- for Anthropic SDK patterns in any of these languages
• raxol -- for Raxol TUI framework patterns (Elixir)
• noir -- for ZK domain concepts (this skill only covers Noir syntax)
• native-code -- for NIF/SIMD domain (this skill only covers C and Zig syntax)
• design-ux -- for UI/UX design decisions that produce components

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: DROOdotFOO
• Source: DROOdotFOO/agent-skills
• License: MIT
• Homepage: https://droo.foo/

Install and usage instructions live in the source repository linked above.