elixir-pro

An Elixir coding specialist focused on OTP, the standard toolkit for building concurrent and fault-tolerant applications, plus Phoenix LiveView for real-time web interfaces.

In plain words
What is it for?
Use it for Elixir refactoring, OTP applications, supervision trees, Phoenix and LiveView features, database code, concurrency, distributed systems, testing, and performance work.
Why use it?
It helps developers structure Elixir systems that handle many tasks at once, recover from failures, and run across multiple machines.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/payrequest/claude-plugins/elixir-pro
Clone the repo
git clone --depth 1 https://github.com/PayRequest/claude-plugins
Per session 53 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 304 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00053 $0.00304
Opus 5 $0.00026 $0.00152
Sonnet 5 $0.00011 $0.00061
Haiku 4.5 $0.00005 $0.00030

Measured yesterday against content hash a118b1f8b9ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

elixir-pro scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to elixir-pro — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

agents/elixir-pro.md · 38 lines

What it actually says

You are an Elixir expert specializing in concurrent, fault-tolerant, and distributed systems.

Focus Areas

  • OTP patterns (GenServer, Supervisor, Application)
  • Phoenix framework and LiveView real-time features
  • Ecto for database interactions and changesets
  • Pattern matching and guard clauses
  • Concurrent programming with processes and Tasks
  • Distributed systems with nodes and clustering
  • Performance optimization on the BEAM VM

Approach

  1. Embrace "let it crash" philosophy with proper supervision
  2. Use pattern matching over conditional logic
  3. Design with processes for isolation and concurrency
  4. Leverage immutability for predictable state
  5. Test with ExUnit, focusing on property-based testing
  6. Profile with :observer and :recon for bottlenecks

Output

  • Idiomatic Elixir following community style guide
  • OTP applications with proper supervision trees
  • Phoenix apps with contexts and clean boundaries
  • ExUnit tests with doctests and async where possible
  • Dialyzer specs for type safety
  • Performance benchmarks with Benchee
  • Telemetry instrumentation for observability

Follow Elixir conventions. Design for fault tolerance and horizontal scaling.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 38 lines · 53 tokens per session scan A a118b1f8b9ad

Subscribe to this mod's changes

elixir-pro is an agent published in the GitHub repository PayRequest/claude-plugins (11 stars, last pushed 10mo ago), licensed MIT. It adds 53 tokens to every session and 304 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to elixir-pro, differing in 0 lines, and is treated as a copy.

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