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 ag0os/rails-dev-plugin --skill rails-jobs-patternsgit clone --depth 1 https://github.com/ag0os/rails-dev-pluginWrote 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/ag0os/rails-dev-plugin/rails-jobs-patterns)<a href="https://agentmods.dev/skills/ag0os/rails-dev-plugin/rails-jobs-patterns"><img src="https://agentmods.dev/badge/skills/ag0os/rails-dev-plugin/rails-jobs-patterns.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00072 | $0.01412 |
| Opus 5 | $0.00036 | $0.00706 |
| Sonnet 5 | $0.00014 | $0.00282 |
| Haiku 4.5 | $0.00007 | $0.00141 |
Grade A, and why
rails-jobs-patterns 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 175 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Rails Background Job Patterns
Analyze and recommend patterns for reliable, efficient background jobs in Rails applications.
Follow standard Rails conventions for retry_on, discard_on, queue_as, and basic ActiveJob structure. Focus on the opinionated patterns below.
Quick Reference
| Pattern | Use When |
|---|---|
_later/_now convention |
Every async operation — name both versions |
| Shallow job + model logic | All new jobs — jobs are wrappers only |
| Double-check locking | Idempotency with concurrent workers |
| Self-splitting batch | Datasets too large for one job |
limits_concurrency |
Solid Queue race condition prevention |
perform_all_later |
Bulk enqueueing (Rails 7.1+) |
Supporting Documentation
- patterns.md - Complete job patterns with detailed examples
Core Principles
- Jobs are shallow wrappers: Business logic lives in its Axis A home (
rails-stack-profiles) — models and concerns fornative, service objects forextracted. Jobs handle only queuing and retry infrastructure _later/_nowconvention: Definething_later(queues job) andthing(does work) on the model. The job just calls the model method- Double-check locking for idempotency: Guard clause THEN
with_lockTHEN guard again — prevents races between concurrent workers - Pass IDs, not objects: Avoid serialization issues and stale data
- Queue segmentation: Separate critical, default, low, and mailers
The _later/_now Pattern (37signals)
# Model defines both versions
class Webhook::Delivery < ApplicationRecord
after_create_commit :deliver_later
def deliver_later
Webhook::DeliveryJob.perform_later(self)
end
def deliver
in_progress!
self.response = perform_request
completed!
rescue => e
failed!(e.message)
end
end
# Job is a shallow wrapper — no business logic
class Webhook::DeliveryJob < ApplicationJob
queue_as :webhooks
def perform(delivery)
delivery.deliver
end
end
What ships with it
1 file 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.
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.
- 8d ago First seen · 175 lines · 72 tokens per session scan A 16016a03f441
rails-jobs-patterns is a skill published in the GitHub repository ag0os/rails-dev-plugin (5 stars, last pushed 3mo ago), licensed MIT. It adds 72 tokens to every session and 1,412 once invoked, about $0.0004 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 2026-08-31.
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