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igmarin/rails-agent-skills

Curated library of 28 public AI agent skills for Ruby on Rails development. Organized by category: testing, code-quality, engines, infrastructure, api, and context. Covers code review, architecture, security, testing (RSpec), engines, Hotwire, and TDD automation. Shared Ruby skills (YARD docs, DDD, service objects) have moved to ruby-core-skills. Repository agents remain documented in GitHub but are intentionally excluded from the Tessl tile.

93

1.78x
Quality

95%

Does it follow best practices?

Impact

93%

1.78x

Average score across 28 eval scenarios

SecuritybySnyk

Passed

No known issues

Overview
Quality
Evals
Security
Files

criteria.jsonevals/scenario-18/

{
  "context": "Checks whether the final artifact follows the write-tests instructions from the published Rails Agent Skills tile.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "instruction-1",
      "description": "The submitted artifact follows this skill instruction: Use this skill when the task is to write, review, or clean up RSpec tests.",
      "max_score": 10
    },
    {
      "name": "instruction-2",
      "description": "The submitted artifact follows this skill instruction: **Core principle:** Prefer behavioral confidence over implementation coupling. Good specs are readable, deterministic, and cheap to maintain.",
      "max_score": 10
    },
    {
      "name": "instruction-3",
      "description": "The submitted artifact follows this skill instruction: Run spec and verify it fails",
      "max_score": 10
    },
    {
      "name": "instruction-4",
      "description": "The submitted artifact follows this skill instruction: Run spec and verify it passes",
      "max_score": 10
    },
    {
      "name": "instruction-5",
      "description": "The submitted artifact follows this skill instruction: **Write the failing spec** — pick the smallest spec type that exercises the intended behaviour (model > service > request > system). See table below for guidance.",
      "max_score": 10
    },
    {
      "name": "instruction-6",
      "description": "The submitted artifact follows this skill instruction: **Run it and confirm the failure message** — show the concrete RED failure class/message for the first spec. Do not leave this as a placeholder template and do not use illustrative `e.g.` failure examples in the final artifact.",
      "max_score": 10
    },
    {
      "name": "instruction-7",
      "description": "The submitted artifact follows this skill instruction: **Verify** — run the full relevant spec file, then the suite, before committing.",
      "max_score": 10
    },
    {
      "name": "instruction-8",
      "description": "The submitted artifact follows this skill instruction: Load these files only when their specific content is needed:",
      "max_score": 10
    },
    {
      "name": "instruction-9",
      "description": "The submitted artifact follows this skill instruction: **[assets/tdd_proof_checklist.md](assets/tdd_proof_checklist.md)** — Use when the task involves new behavior and the final answer must show RED/GREEN proof.",
      "max_score": 10
    },
    {
      "name": "instruction-10",
      "description": "The submitted artifact follows this skill instruction: When asked to write or review RSpec specs, your output MUST satisfy each rule below. Each is graded independently — one violation drops the whole check.",
      "max_score": 10
    }
  ]
}

README.md

tile.json