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.
npx skills add tech-leads-club/agent-skills --skill rails-devgit clone --depth 1 https://github.com/tech-leads-club/agent-skillsWrote 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.
[](https://agentmods.dev/skills/tech-leads-club/agent-skills/rails-dev)<a href="https://agentmods.dev/skills/tech-leads-club/agent-skills/rails-dev"><img src="https://agentmods.dev/badge/skills/tech-leads-club/agent-skills/rails-dev/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/tech-leads-club/agent-skills/rails-dev"><img src="https://agentmods.dev/badge/skills/tech-leads-club/agent-skills/rails-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00199 | $0.02055 |
| Opus 5 | $0.00100 | $0.01027 |
| Sonnet 5 | $0.00040 | $0.00411 |
| Haiku 4.5 | $0.00020 | $0.00205 |
Grade A, and why
rails-dev 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 11d 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.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
What ships with it
24 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/api.md 8.0 KB
- references/async.md 1.7 KB
- references/auth.md 9.8 KB
- references/caching.md 4.8 KB
- references/concerns.md 5.9 KB
- references/crud.md 5.3 KB
- references/error-handling.md 8.4 KB
- references/events.md 4.1 KB
- references/http-client.md 3.4 KB
- references/jobs.md 8.9 KB
- references/logging.md 8.5 KB
- references/mailer.md 3.7 KB
- references/migration.md 6.6 KB
- references/model.md 16 KB
- references/multi-tenant.md 3.6 KB
- references/review.md 6.2 KB
- references/routes.md 5.3 KB
- references/state-records.md 7.1 KB
- references/stimulus.md 4.6 KB
- references/test.md 8.8 KB
- references/turbo.md 4.8 KB
- references/validator.md 3.0 KB
- references/view.md 5.2 KB
- references/webhooks.md 9.5 KB
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.
- 11d ago First seen · 208 lines · 199 tokens per session scan A edb41dc63a47
rails-dev is a skill published in the GitHub repository tech-leads-club/agent-skills (5,159 stars, last pushed today), with no licence file. It adds 199 tokens to every session and 2,055 once invoked, about $0.0010 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.
Other skills, from other repositories
new
Create a new project to start development quickly.
golang-graphql
Implements GraphQL APIs in Golang using gqlgen or graphql-go. Apply when building GraphQL servers, designing schemas, writing resolvers, handling subscriptions, or integrating GraphQL with existing Go HTTP services. Also apply when the codebase imports github.com/99designs/gqlgen or github.com/graph-gophers/graphql-go.
golang-grpc
Provides gRPC usage guidelines, protobuf organization, and production-ready patterns for Golang microservices. Use when implementing, reviewing, or debugging gRPC servers/clients, writing proto files, setting up interceptors, handling gRPC errors with status codes, configuring TLS/mTLS, testing with bufconn, or…
golang-samber-ro
Reactive streams and event-driven programming in Golang using samber/ro — ReactiveX implementation with 150+ type-safe operators, cold/hot observables, 5 subject types (Publish, Behavior, Replay, Async, Unicast), declarative pipelines via Pipe, 40+ plugins (HTTP, cron, fsnotify, JSON, logging), automatic backpressure…
golang-samber-slog
Structured logging extensions for Golang using samber/slog- packages — multi-handler pipelines (slog-multi), log sampling (slog-sampling), attribute formatting (slog-formatter), HTTP middleware (slog-fiber, slog-gin, slog-chi, slog-echo), and backend routing (slog-datadog, slog-sentry, slog-loki, slog-syslog…
golang-samber-do
Dependency injection in Golang using samber/do — service containers, lifecycle management, scopes, health checks, graceful shutdown, and module organization. Apply when using or adopting samber/do, when the codebase imports github.com/samber/do or github.com/samber/do/v2, or when refactoring manual constructor…