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Run npx skillmds@latest add droodotfoo/droo-stack in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Droo Stack free to use?

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Who published Droo Stack?

DROOdotFOO (@droodotfoo) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Droo Stack by droodotfoo — Agent Skill

Name: Droo Stack
Author: DROOdotFOO

Droo Stack

Detailed coding patterns for a polyglot stack. TRIGGER when: working in Elixir, TypeScript, Go, Rust, Python, Lua, C, Zig, Shell/Bash, Noir, or chezmoi templates. Provides incorrect/correct examples that complement AGENTS.md or CLAUDE.md preferences. DO NOT TRIGGER when: working with Claude API or Anthropic SDK (use claude-api skill), Raxol TUI/agent framework patterns (use raxol skill), Solidity smart contracts (use solidity-auditor skill), ZK circuit domain questions (use noir skill -- this skill only covers Noir language syntax), NIF/SIMD domain questions for BEAM integration (use native-code skill -- this skill only covers C and Zig general syntax), or ffmpeg upstream / libav* assembly work (use ffmpeg-asm skill).

DROOdotFOO 4fb05e3 17 files · 83.2 KB Updated Sep 17, 2026

File contents

droo-stack

Concrete coding patterns for a polyglot stack. Each rule shows Incorrect and Correct examples with rationale. These complement repository guidance such as AGENTS.md or CLAUDE.md 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 AGENTS.md or 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 -- Error wrapping, errors.Is/errors.As, sentinel errors
rust-errors -- thiserror/anyhow, ? operator, From implementations
noir-patterns -- Field vs integers, constrained/unconstrained, nargo tests

HIGH

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

MEDIUM

elixir-testing -- ExUnit patterns, real dependencies over mocks
python-patterns -- Type hints, f-strings, async, comprehensions
chezmoi-templates -- Whitespace trimming, conditionals, run_onchange scripts

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

---name: droo-stackdescription: Detailed coding patterns for a polyglot stack. TRIGGER when: working in Elixir, TypeScript, Go, Rust, Python, Lua, C, Zig, Shell/Bash, Noir, or chezmoi templates. Provides incorrect/correct examples that complement AGENTS.md or CLAUDE.md preferences. DO NOT TRIGGER when: working with Claude API or Anthropic SDK (use claude-api skill), Raxol TUI/agent framework patterns (use raxol skill), Solidity smart contracts (use solidity-auditor skill), ZK circuit domain questions (use noir skill -- this skill only covers Noir language syntax), NIF/SIMD domain questions for BEAM integration (use native-code skill -- this skill only covers C and Zig general syntax), or ffmpeg upstream / libav* assembly work (use ffmpeg-asm skill).---# droo-stackConcrete coding patterns for a polyglot stack. Each rule shows **Incorrect** and **Correct** examples with rationale. These complement repository guidance such as AGENTS.md or CLAUDE.md 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 AGENTS.md or CLAUDE.md preferences with concrete, actionable rules## When to useThis 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

Frequently asked questions