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Shelly

Shelly is an agent for Claude Code from mandelbro/agent-workflow-kit. It costs 28 tokens per session (365 once invoked), scanned A, original, Apache-2.0.

A project-planning agent that turns discovery documents, product requirements, and technical proposals into implementation tasks. It estimates work with Fibonacci story points, where larger numbers mean more complexity or uncertainty.

In plain words
What is it for?
Use it to create task lists, write user stories and implementation prompts, assign target files, estimate effort, sequence work, and plan sprints.
Why use it?
It helps convert broad plans into ordered, estimable work that a development team can schedule. It also enforces a consistent task format and a maximum sprint size of 15 points.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

not rated 2repo changed 7d ago A scan 28 tokens original Apache-2.0

Good fit Use it to create task lists, write user stories and implementation prompts, assign target files, estimate effort, sequence work, and plan sprints.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/mandelbro/agent-workflow-kit/shelly
View source ↗ mandelbro/agent-workflow-kit
Install

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.

Clone the repo
git clone --depth 1 https://github.com/mandelbro/agent-workflow-kit

Made for: Claude Code.

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 Shelly

README.md
[![agentmods](https://agentmods.dev/badge/agents/mandelbro/agent-workflow-kit/shelly/github.svg)](https://agentmods.dev/agents/mandelbro/agent-workflow-kit/shelly)
Your own site
<a href="https://agentmods.dev/agents/mandelbro/agent-workflow-kit/shelly"><img src="https://agentmods.dev/badge/agents/mandelbro/agent-workflow-kit/shelly/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 Shelly

Your own site · 80×15
<a href="https://agentmods.dev/agents/mandelbro/agent-workflow-kit/shelly"><img src="https://agentmods.dev/badge/agents/mandelbro/agent-workflow-kit/shelly.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 365 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 $0.00028 $0.00365
Opus 5.5 $0.00011 $0.00146
Sonnet 5.5 $0.00006 $0.00073
Haiku 4.5 $0.00003 $0.00036

Measured 7d ago against content hash d32e752eb27f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Shelly 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 7d 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.

src/claude_workflow_kit/assets/agents/Shelly.md · 42 lines

What it actually says

Shelly: Task Generation & Sprint Planning Agent

You are a project management specialist who breaks down work into well-structured, estimable tasks following the Task Workflow System.

Core Responsibilities

  1. Task Generation — Convert discovery documents, PRDs, and RFCs into implementation tasks
  2. Sprint Planning — Estimate effort, sequence work, and plan sprints
  3. Story Pointing — Evaluate complexity using Fibonacci scale (1, 2, 3, 5, 8)

Task Structure

Each task must include:

  • Task ID: Sequential identifier
  • Title: Concise, action-oriented description
  • File: Target file path for implementation
  • Sprint Points: Fibonacci estimate (1, 2, 3, 5, 8)
  • User Story: As a [role], I want [capability], so that [outcome]
  • Prompt: Detailed implementation instructions

Estimation Guidelines

Points Description
1 Trivial — Simple change, minimal risk
2 Small — Straightforward, low complexity
3 Medium — Moderate complexity, some unknowns
5 Large — Significant complexity, multiple components
8 Extra Large — High complexity, consider splitting

Sprint Planning Rules

  • Maximum 15 points per PR
  • Tasks should be ordered by dependency, then priority
  • No more than 10 tasks per task file
  • Task files should not exceed 500 lines
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. 7d ago Changed · +5 lines · +28 tokens per session d32e752eb27f
  2. 2mo ago First seen · 37 lines · 0 tokens per session scan A 24b30aa525aa

Subscribe to this mod's changes

Shelly is an agent published in the GitHub repository mandelbro/agent-workflow-kit (2 stars, last pushed 7d ago), licensed Apache-2.0. It adds 28 tokens to every session and 365 once invoked, about $0.0001 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 2026-08-31.

PlanningProject management
Related

Shelly compared with agents from other repositories

Shelly next to 6 agents from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
Shellymandelbro/agent-workflow-kitAgent27d agoApache-2.0A28Claude Code
playwright-test-generatormicrosoft/playwrightAgent100ktodayApache-2.0A151Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginnersAgent79ktodayMITA33Claude Code
AVM Owner Triagegithub/awesome-copilotAgent41kyesterdayMITA61Claude Code
code-revieweranthropics/claude-cookbooksAgent54k3d agoMITA52Claude Code
Pimcore Expertgithub/awesome-copilotAgent41kyesterdayMITA26Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilotAgent41kyesterdayMITA11Claude Code