rb:work

rb:work is a skill for Claude Code from slbug/claude-ruby-grape-rails. It costs 46 tokens per session (2,635 once invoked), scanned A, original, MIT.

A workflow for carrying out the unchecked tasks in a Ruby or Rails implementation plan and recording completed work.

In plain words
What is it for?
Use it to resume an active plan, implement tasks one by one, and track progress with plan checkboxes.
Why use it?
It keeps implementation tied to the plan, requires verification after each task, and stops when repeated attempts fail.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the ruby-grape-rails plugin — 52 skills, 19 agents, 17 hooks shipped together

Good fit Use it to resume an active plan, implement tasks one by one, and track progress with plan checkboxes.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add slbug/claude-ruby-grape-rails
Claude Code
/plugin install ruby-grape-rails

Made for: Claude Code.

Or install ruby-grape-rails, the plugin that ships this one along with the rest of its 52 skills, 19 agents, 17 hooks.

Wrote 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.

agentmods badge for rb:work

README.md
[![agentmods](https://agentmods.dev/badge/skills/slbug/claude-ruby-grape-rails/work/github.svg)](https://agentmods.dev/skills/slbug/claude-ruby-grape-rails/work)
Your own site
<a href="https://agentmods.dev/skills/slbug/claude-ruby-grape-rails/work"><img src="https://agentmods.dev/badge/skills/slbug/claude-ruby-grape-rails/work/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.

agentmods 80×15 button for rb:work

Your own site · 80×15
<a href="https://agentmods.dev/skills/slbug/claude-ruby-grape-rails/work"><img src="https://agentmods.dev/badge/skills/slbug/claude-ruby-grape-rails/work.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,635 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.02635
Opus 5.5 $0.00018 $0.01054
Sonnet 5.5 $0.00009 $0.00527
Haiku 4.5 $0.00005 $0.00264

Measured 1mo ago against content hash 9cdae533e3de, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rb:work 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 1mo 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.

plugins/ruby-grape-rails/skills/work/SKILL.md · 350 lines

How it starts

The opening of the file, as written. The whole thing — 350 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Work

Execute the unchecked tasks from a plan file.

Usage

  • /rb:work .claude/plans/user-auth/plan.md
  • /rb:work .claude/plans/user-auth/plan.md --from P2-T3
  • /rb:work (resumes the active plan)

Iron Laws

  1. Never auto-start /rb:review.
  2. Plan checkboxes are the state - check them off as you complete.
  3. Read scratchpad.md before implementing.
  4. Verify after every task with the project's actual toolchain.
  5. After three failed attempts, create a blocker instead of thrashing.
  6. Ask when a task is ambiguous rather than guessing.
  7. Prefer small, verifiable commits over large changes.
  8. Keep Iron Laws visible - review them before each task batch.

Execution State Machine

START ──▶ READ PLAN ──▶ ANALYZE CONTEXT ──▶ PICK TASK
                              │                   │
                              ▼                   ▼
                        CHECK SCRATCHPAD ◀──────┘
                              │
                              ▼
                  ┌───────────────────────┐
                  │   IMPLEMENT TASK      │
                  │   - Read files        │
                  │   - Make changes      │
                  │   - Verify            │
                  └───────────┬───────────┘
                              │
                    ┌─────────┴─────────┐
                    ▼                   ▼
              [SUCCESS]            [FAILURE]
                    │                   │
                    ▼                   ▼
           CHECK OFF TASK ◀─── CREATE BLOCKER
                    │         (after 3 tries)
                    ▼
              MORE TASKS?
                    │
          ┌─────────┴─────────┐
          ▼                   ▼
       [YES]              [NO]
          │                   │
          ▼                   ▼
    PICK NEXT TASK      UPDATE PLAN
                              │
                              ▼
                        SUMMARIZE & OFFER
                        /rb:review

Startup Sequence

Read the full file on GitHub · 350 lines

Files

What ships with it

5 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.

Changes

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.

  1. 1mo ago First seen · 350 lines · 46 tokens per session scan A 9cdae533e3de

Subscribe to this mod's changes

rb:work is a skill published in the GitHub repository slbug/claude-ruby-grape-rails (7 stars, last pushed 16d ago), licensed MIT. It adds 46 tokens to every session and 2,635 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-03.