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Agent skill

Sdd Planning

by madebyaris in madebyaris/spec-kit-command-cursor

Generate technical plans from specifications. An agent skill from madebyaris/spec-kit-command-cursor.

MITAuto-check passedDevelopment

Install Sdd Planning

skills CLI
$ npx skills add madebyaris/spec-kit-command-cursor --skill sdd-planning -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install madebyaris/spec-kit-command-cursor sdd-planning --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/madebyaris/spec-kit-command-cursor.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.cursor/skills/sdd-planning .claude/skills/sdd-planning && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
sdd-planning
GitHub stars
197
Token cost
~499 tokens
SKILL.md length
150 words
Files
3 (incl. references, assets)
Skills in repo
6
Repo updated
First seen
Licence
MIT

At a glance

Generate technical plans from specifications. An agent skill from madebyaris/spec-kit-command-cursor.

  • Works in 5 steps: Understand Requirements → Design Architecture → Select Technology → …
  • Creating architecture documents
  • SKILL.md covers When to Use, Planning Protocol, Output Format and References, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Sdd Planning is an agent skill from madebyaris/spec-kit-command-cursor. Generate technical plans from specifications. Use when creating architecture documents, designing system components, or preparing for implementation.

Its SKILL.md is about 500 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files and assets (for example `assets/diagram-templates.md` and `references/estimation-heuristics.md`).

It sits in Development. The repository describes itself as: SDD toolkit for Cursor IDE — /specify, /plan, /tasks to turn ideas into specs, plans, and actionable tasks. The licence is MIT.

When your agent uses it

  • Creating architecture documents
  • Designing system components
  • Preparing for implementation

Example prompts

  • “/sdd-planning”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Understand Requirements
  2. Design Architecture
  3. Select Technology
  4. Plan Implementation
  5. Assess Risks

What it can do on your machine

Read from SKILL.md and the folder at commit 36b26f9. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Sdd Planning loads about 499 tokens when it runs, and up to ~1.1k if it reads all its reference files. Until then it costs about 41 tokens; SKILL.md has 150 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~41
When it runs · the whole SKILL.md, loaded when a task matches
~499
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from madebyaris/spec-kit-command-cursor at commit 36b26f9, republished under its MIT licence (© madebyaris). 150 words, ~499 tokens.

Download SKILL.mdSave it as .claude/skills/sdd-planning/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
sdd-planning
description
Generate technical plans from specifications. Use when creating architecture documents, designing system components, or preparing for implementation.

SDD Planning Skill

Transform specifications into actionable technical plans.

When to Use

  • Spec exists but plan doesn't
  • Designing system architecture
  • Breaking down features into components
  • After research is complete

Planning Protocol

Step 1: Understand Requirements

Read spec.md, note functional/non-functional requirements, review research findings.

Step 2: Design Architecture

Identify components, define responsibilities, design interfaces, plan data flow.

Step 3: Select Technology

Evaluate against requirements, consider existing stack, document rationale.

Step 4: Plan Implementation

Break into phases (Setup → Core → Integration → Polish), identify dependencies, estimate effort.

Step 5: Assess Risks

Identify technical risks, plan mitigations, note assumptions.

Output Format

Generate plan.md with:

markdown
# Technical Plan: [Task ID]

## Overview
## Architecture (Mermaid diagram)
## Components (table: name, responsibility, dependencies)
## Technology Stack (with rationale)
## API Design
## Data Models
## Security Considerations
## Performance Targets
## Implementation Phases (Setup → Core → Integration → Polish)
## Risks (probability, impact, mitigation)
## Testing Strategy (unit, integration, E2E)
## Open Questions

References

  • assets/diagram-templates.md — Architecture diagram patterns (Mermaid templates)
  • references/estimation-heuristics.md — Task sizing guidelines, common pitfalls, and estimation by task type
  • .sdd/templates/decision-matrix.md — When to use Brief vs Full SDD planning

Integration

  • Input from: sdd-research skill, sdd-explorer subagent
  • Output to: /tasks command, sdd-implementer subagent
  • Use the ask question tool for architectural decisions with significant tradeoffs

© madebyaris, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references, assets) in .cursor/skills/sdd-planning of madebyaris/spec-kit-command-cursor.

  • SKILL.md
  • assets/diagram-templates.md
  • references/estimation-heuristics.md

Open the folder on GitHubat commit 36b26f9

Compare with similar skills

Sdd Planning next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Sdd Planning compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Sdd Planning this skillmadebyaris/spec-kit-command-cursor197—~499Automated safety check: PassMIT
Vercel Composition Patternssupabase/supabase111k58 repos~726Automated safety check: PassMIT
Finishing a Development Branchobra/superpowers297k5 repos~1.9kAutomated safety check: PassMIT
Typescript Advanced Typesrolling-scopes/rsschool-app10k25 repos~4.2kAutomated safety check: PassMPL-2.0
PR Babysitteropeninterpreter/openinterpreter69k3 repos~4.2kAutomated safety check: PassApache-2.0
Code Review ChecklistshareAI-lab/learn-claude-code78k4 repos~1.1kAutomated safety check: PassMIT

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More from madebyaris/spec-kit-command-cursor

  • Sdd Evolve

    madebyaris/spec-kit-command-cursor

    Update specifications with discoveries made during development.

    197 GitHub stars~562 tokensUpdated 3 mo ago
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  • Sdd Implementation

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    Execute planned implementations following todo-lists systematically.

    197 GitHub stars~444 tokensUpdated 3 mo ago
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  • Sdd Research

    madebyaris/spec-kit-command-cursor

    Pattern investigation and technical research before specification.

    197 GitHub stars~1.3k tokensUpdated 3 mo ago
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  • Sdd Audit

    madebyaris/spec-kit-command-cursor

    Compare implementation against specifications, identify gaps and issues.

    197 GitHub stars~405 tokensUpdated 3 mo ago
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  • Sdd Memory

    madebyaris/spec-kit-command-cursor

    Recall and persist durable project knowledge (decisions, conventions, gotchas, architecture) across SDD sessions.

    197 GitHub stars~862 tokensUpdated 3 mo ago
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Categories

Questions about Sdd Planning

What does Sdd Planning do?

Generate technical plans from specifications. An agent skill from madebyaris/spec-kit-command-cursor. Sdd Planning is an agent skill from madebyaris/spec-kit-command-cursor. Generate technical plans from specifications.

When should I use Sdd Planning?

Sdd Planning fits situations like: creating architecture documents; designing system components; preparing for implementation.

How do I install Sdd Planning in Claude Code?

Run `npx skills add madebyaris/spec-kit-command-cursor --skill sdd-planning -a claude-code`. Or copy the skill folder (.cursor/skills/sdd-planning in madebyaris/spec-kit-command-cursor) into .claude/skills/sdd-planning in your project. Claude Code loads it when a task matches its description.

How do I install Sdd Planning in Codex?

Run `npx skills add madebyaris/spec-kit-command-cursor --skill sdd-planning -a codex`. Or copy the skill folder (.cursor/skills/sdd-planning in madebyaris/spec-kit-command-cursor) into .agents/skills/sdd-planning in your project. Codex loads it when a task matches its description.

Can I use Sdd Planning in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add madebyaris/spec-kit-command-cursor --skill sdd-planning -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sdd-planning, .gemini/skills/sdd-planning, .github/skills/sdd-planning and .opencode/skills/sdd-planning in your project.

What does Sdd Planning need to run?

SKILL.md names no scripts, command-line tools or credentials: Sdd Planning is instructions for the agent only.

Does Sdd Planning access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Sdd Planning safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Sdd Planning use?

Sdd Planning is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Sdd Planning use?

About 499 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 603 tokens, read only when the agent opens those files.

What are the alternatives to Sdd Planning?

Skills that share tags, products or a category with Sdd Planning: Vercel Composition Patterns (supabase/supabase, 111k stars), Finishing a Development Branch (obra/superpowers, 297k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and PR Babysitter (openinterpreter/openinterpreter, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Sdd Planning?

madebyaris (a GitHub user) maintains it in madebyaris/spec-kit-command-cursor, which has 197 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on June 22, 2026.

Source: madebyaris/spec-kit-command-cursor on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.