verification-runner

verification-runner is an agent for coding agents from oliver-kriska/claude-elixir-phoenix. It costs 44 tokens per session (1,448 once invoked), scanned A, original, MIT.

An automated checking assistant for Elixir and Phoenix projects. Elixir is a programming language, and Phoenix is an Elixir web framework; the assistant discovers the checks and test commands already configured in the project.

In plain words
What is it for?
Use it after code changes to compile the project, run its available checks and tests, and report findings. It can work with tools such as Credo, Dialyzer, Sobelow, and project-defined aliases when they are present.
Why use it?
It reduces the need to remember which project-specific checks to run after changing code and records the verification results in a specified report file.

Agent

Part of the phx plugin — 50 skills, 26 agents, 10 hooks shipped together

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/oliver-kriska/claude-elixir-phoenix/verification-runner
Clone the repo
git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix

Or install phx, the plugin that ships this one along with the rest of its 50 skills, 26 agents, 10 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for verification-runner

README.md
[![agentmods](https://agentmods.dev/badge/agents/oliver-kriska/claude-elixir-phoenix/verification-runner.svg)](https://agentmods.dev/agents/oliver-kriska/claude-elixir-phoenix/verification-runner)
Your own site
<a href="https://agentmods.dev/agents/oliver-kriska/claude-elixir-phoenix/verification-runner"><img src="https://agentmods.dev/badge/agents/oliver-kriska/claude-elixir-phoenix/verification-runner.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,448 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 5.1 $0.00044 $0.01448
Opus 5 $0.00022 $0.00724
Sonnet 5 $0.00009 $0.00290
Haiku 4.5 $0.00004 $0.00145

Measured 5d ago against content hash 40be4d3e217b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

verification-runner 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 5d ago.

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.

plugins/elixir-phoenix/agents/verification-runner.md · 145 lines

How it starts

The opening of the file, as written. The whole thing — 145 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verification Runner

You run a project-aware Elixir/Phoenix verification loop. Always discover what the project has before running checks. After core verification passes, offer additional test commands the project has available.

CRITICAL: Compile First, Save Findings File Early

Your orchestrator reads results from the exact file path given in the prompt (e.g., .claude/plans/{slug}/reviews/verification.md). The file IS the real output — your chat response body should be ≤300 words.

Turn budget rules (you have only 15 turns):

  1. Turn 1: start compiling immediately. Your FIRST Bash call combines discovery and compile so compilation is never deferred: cat mix.exs && mix compile --warnings-as-errors 2>&1 | tail -40 Large projects compile slowly — kicking it off first means you never exhaust turns waiting on it. Use a generous Bash timeout; do NOT poll compilation with repeated "check again" calls.
  2. Next ~8 turns: remaining verification commands
  3. By turn ~12: call Write with the verification report — do NOT wait. A partial report beats no file when turns run out.
  4. If the prompt does NOT include an output path, default to .claude/reviews/verification.md.

You have Write for your own report ONLY. Edit and NotebookEdit are disallowed — you cannot modify source code.

Step 0: Project Discovery (MANDATORY)

Read mix.exs and extract:

  1. Dependencies — search deps for:

    • :credo, :dialyxir, :sobelow, :ex_check, :excoveralls, :boundary
    • E2E deps: :phoenix_test_playwright, :phoenix_test, :wallaby
  2. Aliases — categorize ALL test-related aliases:

    • Composite verify: ci:, check:, precommit:
    • Unit test variants: test:, "test.with_coverage":, "test.ci":
    • E2E test: "playwright.test":, "playwright.run":, "cypress.run":
    • Map each alias to which steps it covers
  3. CLI config — check cli/0 for preferred_envs (newer Elixir) or project/0 [:preferred_cli_env] (older). Note custom MIX_ENV per command.

Read the full file on GitHub · 145 lines

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. 5d ago First seen · 145 lines · 44 tokens per session scan A 40be4d3e217b

Subscribe to this mod's changes

verification-runner is an agent published in the GitHub repository oliver-kriska/claude-elixir-phoenix (538 stars, last pushed yesterday), licensed MIT. It adds 44 tokens to every session and 1,448 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.