Agent skill

Elixir Idioms

by irahardianto in irahardianto/awesome-agv

Elixir and OTP idioms: pattern matching, with pipelines, GenServer and supervision tree architecture, fault-tolerant concurrency, and ExUnit testing.

MITAuto-check passedDevelopment

Install Elixir Idioms

skills CLI

$ npx skills add irahardianto/awesome-agv --skill elixir-idioms -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install irahardianto/awesome-agv elixir-idioms --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/irahardianto/awesome-agv.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/elixir-idioms .claude/skills/elixir-idioms && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "elixir-idioms" agent skill from https://github.com/irahardianto/awesome-agv/tree/main/.agents/skills/elixir-idioms into .claude/skills/elixir-idioms/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "elixir-idioms", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/irahardianto/awesome-agv/tree/main/.agents/skills/elixir-idioms

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add irahardianto/awesome-agv --skill elixir-idioms -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install irahardianto/awesome-agv elixir-idioms --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/irahardianto/awesome-agv.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/elixir-idioms .agents/skills/elixir-idioms && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "elixir-idioms" agent skill from https://github.com/irahardianto/awesome-agv/tree/main/.agents/skills/elixir-idioms into .agents/skills/elixir-idioms/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "elixir-idioms", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add irahardianto/awesome-agv --skill elixir-idioms -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install irahardianto/awesome-agv elixir-idioms --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/irahardianto/awesome-agv.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/elixir-idioms .cursor/skills/elixir-idioms && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "elixir-idioms" agent skill from https://github.com/irahardianto/awesome-agv/tree/main/.agents/skills/elixir-idioms into .cursor/skills/elixir-idioms/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "elixir-idioms", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/irahardianto/awesome-agv.git --path .agents/skills/elixir-idioms

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add irahardianto/awesome-agv --skill elixir-idioms -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install irahardianto/awesome-agv elixir-idioms --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/irahardianto/awesome-agv.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/elixir-idioms .gemini/skills/elixir-idioms && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "elixir-idioms" agent skill from https://github.com/irahardianto/awesome-agv/tree/main/.agents/skills/elixir-idioms into .gemini/skills/elixir-idioms/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "elixir-idioms", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install irahardianto/awesome-agv elixir-idioms

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add irahardianto/awesome-agv --skill elixir-idioms -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/irahardianto/awesome-agv.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/elixir-idioms .github/skills/elixir-idioms && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "elixir-idioms" agent skill from https://github.com/irahardianto/awesome-agv/tree/main/.agents/skills/elixir-idioms into .github/skills/elixir-idioms/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "elixir-idioms", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add irahardianto/awesome-agv --skill elixir-idioms -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install irahardianto/awesome-agv elixir-idioms --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/irahardianto/awesome-agv.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/elixir-idioms .opencode/skills/elixir-idioms && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "elixir-idioms" agent skill from https://github.com/irahardianto/awesome-agv/tree/main/.agents/skills/elixir-idioms into .opencode/skills/elixir-idioms/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "elixir-idioms", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: elixir-idioms
GitHub stars: 157
Token cost: ~771 tokens
SKILL.md length: 177 words
Files: 1
Skills in repo: 34
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Elixir and OTP idioms: pattern matching, with pipelines, GenServer and supervision tree architecture, fault-tolerant concurrency, and ExUnit testing.

Works in 2 steps: Pattern match everything — function… → with for happy-path pipelines
Reviewing Elixir and Phoenix applications
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Tasks that involve LLM observability

What it does

Elixir Idioms is an agent skill from irahardianto/awesome-agv. Elixir and OTP idioms: pattern matching, with pipelines, GenServer and supervision tree architecture, fault-tolerant concurrency, and ExUnit testing. Use when developing, refactoring, or reviewing Elixir and Phoenix applications or OTP systems.

Its SKILL.md is about 770 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering LLM observability and Refactoring. It works with Elixir. The repository describes itself as: Comprehensive sets of standards and practices designed to elevate the capabilities of AI coding agents. The licence is MIT.

When your agent uses it

Reviewing Elixir and Phoenix applications
Tasks that involve LLM observability
Tasks that involve Refactoring

Example prompts

“/elixir-idioms”

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

Pattern match everything — function heads, case, with
with for happy-path pipelines

What it can do on your machine

Read from SKILL.md and the folder at commit 9e997ba. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are elixir).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Elixir Idioms loads about 771 tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 177 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~65
When it runs · the whole SKILL.md, loaded when a task matches: ~771

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from irahardianto/awesome-agv at commit 9e997ba, republished under its MIT licence (© irahardianto). 177 words, ~771 tokens.

Download SKILL.mdSave it as .claude/skills/elixir-idioms/SKILL.md (or your agent's skills folder).

name: elixir-idioms
description: Elixir and OTP idioms: pattern matching, `with` pipelines, GenServer and supervision tree architecture, fault-tolerant concurrency, and ExUnit testing. Use when developing, refactoring, or reviewing Elixir and Phoenix applications or OTP systems.

Elixir Idioms and Patterns

Elixir rewards immutability, pattern matching, and the OTP supervision model. Idiomatic Elixir = functional, fault-tolerant, process-oriented.

Scope: Elixir coding idioms. Test naming: .agents/rules/testing-strategy.md.

Pattern Matching

Pattern match everything — function heads, case, with:

elixir

def handle_result({:ok, task}), do: {:reply, task}
def handle_result({:error, :not_found}), do: {:error, 404}
def handle_result({:error, reason}), do: {:error, 500, reason}

with for happy-path pipelines:

elixir

with {:ok, user} <- fetch_user(user_id),
     {:ok, task} <- create_task(user, params),
     :ok <- notify(user, task) do
  {:ok, task}
end

OTP and Supervision

GenServer for stateful processes:

elixir

defmodule TaskCache do
  use GenServer

  def start_link(opts), do: GenServer.start_link(__MODULE__, %{}, opts)
  def get(pid, id), do: GenServer.call(pid, {:get, id})

  @impl true
  def handle_call({:get, id}, _from, state) do
    {:reply, Map.get(state, id), state}
  end
end

Supervision trees — "let it crash" philosophy. Supervisors restart failed children.
Never try/catch in normal flow — let processes crash and restart cleanly.

Pipe Operator

|> for data transformation pipelines:

elixir

tasks
|> Enum.filter(&(&1.active))
|> Enum.sort_by(& &1.priority, :desc)
|> Enum.map(&TaskView.render/1)

First argument must be the piped value. Design APIs pipe-friendly.

Naming

snake_case for functions, variables, atoms, module attributes.
PascalCase for module names.
? suffix for boolean functions: active?/1.
! suffix for functions that raise: get!/1 (vs get/1 returning {:ok, _}).

Testing

ExUnit:

elixir

defmodule TaskServiceTest do
  use ExUnit.Case, async: true

  test "creates task with valid params" do
    {:ok, task} = TaskService.create(%{title: "Test", priority: :high})
    assert task.title == "Test"
  end
end

Mox for mock-based testing (behaviour contracts).

Formatting and Static Analysis

Tool	Purpose	Command
`mix format`	Formatting	`mix format`
Credo	Linting	`mix credo --strict`
Dialyzer	Type checking	`mix dialyzer`
`mix deps.audit`	CVE scanning	`mix deps.audit`

Code Idioms and Conventions .agents/rules/code-idioms-and-conventions.md
Error Handling Principles .agents/rules/error-handling-principles.md
Testing Strategy .agents/rules/testing-strategy.md
Concurrency and Threading Principles @.agents/rules/concurrency-and-threading-principles.md

Files

Just SKILL.md in .agents/skills/elixir-idioms of irahardianto/awesome-agv.

Open the folder on GitHubat commit 9e997ba

Compare with similar skills

Elixir Idioms next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Elixir Idioms compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Elixir Idioms this skillirahardianto/awesome-agv	157	—	~771	Automated safety check: Pass	MIT	5 days ago
Elixirstreamband/hydra-srt	147	—	~804	Automated safety check: Pass	Apache-2.0	23 days ago
Change CleanupSimon-Initiative/oli-torus	119	—	~3.7k	Automated safety check: Pass	MIT	yesterday
Elixir AntipatternsGentleman-Programming/Gentleman-Skills	658	—	~2.1k	Automated safety check: Pass	MIT	6 mo ago
Elixirericrisco/rsc-harness	174	—	~2.9k	Automated safety check: Pass	MIT	2 days ago
Phx Techdebtoliver-kriska/claude-elixir-phoenix	565	—	~583	Automated safety check: Pass	MIT	4 days ago

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Questions about Elixir Idioms

What does Elixir Idioms do?

Elixir and OTP idioms: pattern matching, with pipelines, GenServer and supervision tree architecture, fault-tolerant concurrency, and ExUnit testing. Elixir Idioms is an agent skill from irahardianto/awesome-agv. Elixir and OTP idioms: pattern matching, with pipelines, GenServer and supervision tree architecture, fault-tolerant concurrency, and ExUnit testing.

When should I use Elixir Idioms?

Elixir Idioms fits situations like: reviewing Elixir and Phoenix applications; tasks that involve LLM observability; tasks that involve Refactoring.

How do I install Elixir Idioms in Claude Code?

Run `npx skills add irahardianto/awesome-agv --skill elixir-idioms -a claude-code`. Or copy the skill folder (.agents/skills/elixir-idioms in irahardianto/awesome-agv) into .claude/skills/elixir-idioms in your project. Claude Code loads it when a task matches its description.

How do I install Elixir Idioms in Codex?

Run `npx skills add irahardianto/awesome-agv --skill elixir-idioms -a codex`. Or copy the skill folder (.agents/skills/elixir-idioms in irahardianto/awesome-agv) into .agents/skills/elixir-idioms in your project. Codex loads it when a task matches its description.

Can I use Elixir Idioms in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add irahardianto/awesome-agv --skill elixir-idioms -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/elixir-idioms, .gemini/skills/elixir-idioms, .github/skills/elixir-idioms and .opencode/skills/elixir-idioms in your project.

What does Elixir Idioms need to run?

SKILL.md names no scripts, command-line tools or credentials: Elixir Idioms is instructions for the agent only.

Does Elixir Idioms access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Elixir Idioms safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Elixir Idioms use?

Elixir Idioms is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Elixir Idioms use?

About 771 tokens (SKILL.md is roughly 3.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Elixir Idioms?

Skills that share tags, products or a category with Elixir Idioms: Elixir (streamband/hydra-srt, 147 stars), Change Cleanup (Simon-Initiative/oli-torus, 119 stars), Elixir Antipatterns (Gentleman-Programming/Gentleman-Skills, 658 stars) and Elixir (ericrisco/rsc-harness, 174 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Elixir Idioms?

irahardianto (a GitHub user) maintains it in irahardianto/awesome-agv, which has 157 GitHub stars. The repository holds 34 skills in this directory. The repository was last updated on October 5, 2026.

Source: irahardianto/awesome-agv on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Elixir Idioms

Install Elixir Idioms

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Elixir Idioms and Patterns

Pattern Matching

OTP and Supervision

Pipe Operator

Naming

Testing

Formatting and Static Analysis

Files

Compare with similar skills

Similar skills

Elixir

Change Cleanup

Elixir Antipatterns

Elixir

Phx Techdebt

Phx Techdebt

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Questions about Elixir Idioms

Install Elixir Idioms

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Elixir Idioms and Patterns

Pattern Matching

OTP and Supervision

Pipe Operator

Naming

Testing

Formatting and Static Analysis

Related

Files

Compare with similar skills

Similar skills

More from irahardianto/awesome-agv

Related

Questions about Elixir Idioms