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
95%
Does it follow best practices?
Impact
93%
1.78xAverage score across 28 eval scenarios
Passed
No known issues
Example 1 — Move a PORO (pricing calculator)
Task: "Extract the Pricing::Calculator into MyEngine with no host-model dependency yet."
Expected output (JSON):
{ "slice_name": "pricing_calculator", "actions": [ "move app/services/pricing/calculator.rb -> my_engine/app/services/my_engine/pricing_calculator.rb", "rename module Pricing::Calculator -> MyEngine::PricingCalculator", "add minimal spec to spec/services/my_engine/pricing_calculator_spec.rb" ], "verification_commands": [ "bundle exec rspec spec/services/pricing/ spec/requests/orders/" ] }
Example 2 — Add adapter for current_user
Task: "Engine needs current_user; provide a configurable provider seam."
Expected output (JSON):
{ "slice_name": "order_creator_adapter", "actions": [ "add lib/my_engine/configuration.rb with current_user_provider attr_accessor", "change OrderCreator.for_request to use MyEngine.config.current_user_provider.call(request)", "document host initializer and expected callable signature" ], "verification_commands": [ "bundle exec rspec spec/services/order_creator_spec.rb"] }
agents
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
skills
api
generate-api-collection
implement-graphql
code-quality
apply-code-conventions
apply-stack-conventions
assets
snippets
code-review
refactor-code
review-architecture
security-check
context
load-context
setup-environment
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
testing
plan-tests
test-service
write-tests