superplan

superplan is a skill for Claude Code from asteroid-belt/skulto. It costs 67 tokens per session (6,806 once invoked), scanned A, original, MIT.

A planning tool for large software features, projects, and other complex tasks. It creates a phased plan with estimates, tests written before implementation, quality checks, and phases that can be done in parallel.

In plain words
What is it for?
Use it to plan new features or epics, inspect the existing codebase and development tools, define acceptance checks, and prepare work for multiple agents.
Why use it?
It turns a broad request into an agreed sequence of concrete work, so the team can understand the scope before coding begins.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions CLAUDE.md; mentions subagents; mentions Claude Code.

Good fit Use it to plan new features or epics, inspect the existing codebase and development tools, define acceptance checks, and prepare work for multiple agents.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/asteroid-belt/skulto/superplan
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.

Any agent
npx skills add asteroid-belt/skulto --skill superplan
Clone the repo
git clone --depth 1 https://github.com/asteroid-belt/skulto

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 superplan

README.md
[![agentmods](https://agentmods.dev/badge/skills/asteroid-belt/skulto/superplan/github.svg)](https://agentmods.dev/skills/asteroid-belt/skulto/superplan)
Your own site
<a href="https://agentmods.dev/skills/asteroid-belt/skulto/superplan"><img src="https://agentmods.dev/badge/skills/asteroid-belt/skulto/superplan/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 superplan

Your own site · 80×15
<a href="https://agentmods.dev/skills/asteroid-belt/skulto/superplan"><img src="https://agentmods.dev/badge/skills/asteroid-belt/skulto/superplan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,806 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00067 $0.06806
Opus 5 $0.00034 $0.03403
Sonnet 5 $0.00013 $0.01361
Haiku 4.5 $0.00007 $0.00681

Measured 9d ago against content hash 999d0435a97f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

superplan 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 9d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • superplan — 92% identical, 45 lines differ
.claude/skills/superplan/SKILL.md · 771 lines

How it starts

The opening of the file, as written. The whole thing — 771 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Superplan: Comprehensive Feature Planning

Overview

Superplan creates detailed, executable implementation plans that enable parallel agent execution. Each plan includes everything needed to implement a feature: requirements, architecture, code changes, tests, and acceptance criteria.

When to Use Superplan

  • Starting a new feature or epic
  • Complex tasks requiring multiple phases
  • Tasks that could benefit from parallel execution by multiple agents
  • When you need comprehensive documentation of implementation decisions
  • When the team needs to understand the full scope before committing

Core Workflow

┌─────────────────────────────────────────────────────────────────────┐
│                         SUPERPLAN WORKFLOW                          │
├─────────────────────────────────────────────────────────────────────┤
│  1. INTAKE          →  Gather story/requirements from user          │
│  2. DETECT          →  Check CLAUDE.md/AGENTS.md first, then scan   │
│                        (BYPASS codebase scan if docs complete)      │
│  3. INTERVIEW       →  Ask clarifying questions                     │
│  4. RESEARCH        →  Look up best practices for DETECTED STACK    │
│                        (BYPASS if CLAUDE.md/AGENTS.md was complete) │
│  5. EXPLORE         →  Understand existing codebase patterns        │
│                        (ALWAYS runs - never bypassed)               │
│  6. REFACTOR ASSESS →  Evaluate if refactoring should precede work  │
│  7. ARCHITECT       →  Design solution with diagrams                │
│  8. PHASE           →  Break into parallelizable phases + ESTIMATES │
│  9. DETAIL          →  Specify code deltas per phase                │
│ 10. TEST            →  Define failing tests per phase (TDD)         │
│ 11. DOCUMENT        →  Write plan to docs/<feature>-plan.md         │
└─────────────────────────────────────────────────────────────────────┘

CRITICAL: Parallel Execution with Sub-Agents

YOU MUST USE SUB-AGENTS OR PARALLEL TASKS for every parallelizable operation:

Read the full file on GitHub · 771 lines

Files

What ships with it

6 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. 9d ago First seen · 771 lines · 67 tokens per session scan A 999d0435a97f

Subscribe to this mod's changes

superplan is a skill published in the GitHub repository asteroid-belt/skulto (50 stars, last pushed yesterday), licensed MIT. It adds 67 tokens to every session and 6,806 once invoked, about $0.0003 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.