Curated library of 41 public AI agent skills for Ruby on Rails development. Organized by category: planning, testing, code-quality, ddd, engines, infrastructure, api, patterns, context, and orchestration. Covers code review, architecture, security, testing (RSpec), engines, service objects, DDD patterns, and TDD automation. Repository workflows remain documented in GitHub but are intentionally excluded from the Tessl tile.
95
93%
Does it follow best practices?
Impact
96%
1.77xAverage score across 41 eval scenarios
Passed
No known issues
{
"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
}
]
}docs
evals
scenario-1
scenario-2
scenario-3
scenario-4
scenario-5
scenario-6
scenario-7
scenario-8
scenario-9
scenario-10
scenario-11
scenario-12
scenario-13
scenario-14
scenario-15
scenario-16
scenario-17
scenario-18
scenario-19
scenario-20
scenario-21
scenario-22
scenario-23
scenario-24
scenario-25
scenario-26
scenario-27
scenario-28
scenario-29
scenario-30
scenario-31
scenario-32
scenario-33
scenario-34
scenario-35
scenario-36
scenario-37
scenario-38
scenario-39
scenario-40
scenario-41
mcp_server
skills
api
generate-api-collection
implement-graphql
code-quality
apply-code-conventions
apply-stack-conventions
assets
snippets
code-review
refactor-code
respond-to-review
review-architecture
security-check
context
load-context
setup-environment
ddd
define-domain-language
model-domain
review-domain-boundaries
engines
create-engine
create-engine-installer
document-engine
extract-engine
release-engine
review-engine
test-engine
upgrade-engine
infrastructure
implement-background-job
implement-hotwire
optimize-performance
review-migration
seed-database
version-api
orchestration
skill-router
patterns
create-service-object
implement-calculator-pattern
write-yard-docs
planning
create-prd
generate-tasks
plan-tickets
testing
plan-tests
test-service
triage-bug
write-tests
workflows