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Agent skill

Speckit Plan

by foryourhealth111-pixel in foryourhealth111-pixel/Vibe-Skills

Generate technical implementation plans from feature specifications.

Apache-2.0Auto-check passedAgent Workflows

Install Speckit Plan

skills CLI
$ npx skills add foryourhealth111-pixel/Vibe-Skills --skill speckit-plan -a claude-code

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

GitHub CLI
$ gh skill install foryourhealth111-pixel/Vibe-Skills speckit-plan --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/foryourhealth111-pixel/Vibe-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/bundled/skills/speckit-plan .claude/skills/speckit-plan && 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
speckit-plan
GitHub stars
3.6k
Token cost
~870 tokens
SKILL.md length
343 words
Files
1
Skills in repo
81
Repo updated
First seen
Licence
Apache-2.0

At a glance

Generate technical implementation plans from feature specifications.

  • Works in 2 steps: Outline & Research → Design & Contracts
  • Tasks that involve Spec-driven development
  • SKILL.md covers User Input, Outline, Phases and Key rules
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Speckit Plan is an agent skill from foryourhealth111-pixel/Vibe-Skills. Generate technical implementation plans from feature specifications. Use after creating a spec to define architecture, tech stack, and implementation phases. Creates plan.md with detailed technical design.

Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Requires spec-kit project structure with .specify/ directory

It sits in Agent Workflows, covering Spec-driven development and Planning. The repository describes itself as: Intelligent Skill routing and workflow orchestration for AI agents — +21.12 pp reward, −29.6% tokens on SkillsBench with DeepSeekV4Flash-VE. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Spec-driven development
  • Tasks that involve Planning

Example prompts

  • “/speckit-plan”

Requirements

  • Compatibility (from SKILL.md): Requires spec-kit project structure with .specify/ directory

Workflow steps

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

  1. Outline & Research
  2. Design & Contracts

What it can do on your machine

Read from SKILL.md and the folder at commit ddcaa2a. 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.

    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.

  • Compatibility

    Requires spec-kit project structure with .specify/ directory

    From compatibility in the SKILL.md frontmatter.

Context cost

Speckit Plan loads about 870 tokens when it runs. Until then it costs about 55 tokens; SKILL.md has 343 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~55
When it runs · the whole SKILL.md, loaded when a task matches
~870

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 foryourhealth111-pixel/Vibe-Skills at commit ddcaa2a, republished under its Apache-2.0 licence (© foryourhealth111-pixel). 343 words, ~870 tokens.

Download SKILL.mdSave it as .claude/skills/speckit-plan/SKILL.md (or your agent's skills folder).
name
speckit-plan
description
Generate technical implementation plans from feature specifications. Use after creating a spec to define architecture, tech stack, and implementation phases. Creates plan.md with detailed technical design.
compatibility
Requires spec-kit project structure with .specify/ directory
metadata.author
github-spec-kit
metadata.source
templates/commands/plan.md

Speckit Plan Skill

User Input

text
$ARGUMENTS

You MUST consider the user input before proceeding (if not empty).

Outline

  1. Setup: Run .specify/scripts/powershell/setup-plan.ps1 -Json from repo root and parse JSON for FEATURE_SPEC, IMPL_PLAN, SPECS_DIR, BRANCH. For single quotes in args like "I'm Groot", use escape syntax: e.g 'I'''m Groot' (or double-quote if possible: "I'm Groot").

  2. Load context: Read FEATURE_SPEC and .specify/memory/constitution.md. Load IMPL_PLAN template (already copied).

  3. Execute plan workflow: Follow the structure in IMPL_PLAN template to:

    • Fill Technical Context (mark unknowns as "NEEDS CLARIFICATION")
    • Fill Constitution Check section from constitution
    • Evaluate gates (ERROR if violations unjustified)
    • Phase 0: Generate research.md (resolve all NEEDS CLARIFICATION)
    • Phase 1: Generate data-model.md, contracts/, quickstart.md
    • Phase 1: Update agent context by running the agent script
    • Re-evaluate Constitution Check post-design

  4. Stop and report: Command ends after Phase 2 planning. Report branch, IMPL_PLAN path, and generated artifacts.

Phases

Phase 0: Outline & Research

  1. Extract unknowns from Technical Context above:

    • For each NEEDS CLARIFICATION → research task
    • For each dependency → best practices task
    • For each integration → patterns task

  2. Generate and dispatch research agents:

    text
    For each unknown in Technical Context:
  Task: "Research {unknown} for {feature context}"
For each technology choice:
  Task: "Find best practices for {tech} in {domain}"

  3. Consolidate findings in research.md using format:

    • Decision: [what was chosen]
    • Rationale: [why chosen]
    • Alternatives considered: [what else evaluated]

Output: research.md with all NEEDS CLARIFICATION resolved

Show full SKILL.md (141 more words)Show less
Phase 1: Design & Contracts

Prerequisites: research.md complete

  1. Extract entities from feature spec → data-model.md:

    • Entity name, fields, relationships
    • Validation rules from requirements
    • State transitions if applicable

  2. Define interface contracts (if project has external interfaces) → /contracts/:

    • Identify what interfaces the project exposes to users or other systems
    • Document the contract format appropriate for the project type
    • Examples: public APIs for libraries, command schemas for CLI tools, endpoints for web services, grammars for parsers, UI contracts for applications
    • Skip if project is purely internal (build scripts, one-off tools, etc.)

  3. Agent context update:

    • Run .specify/scripts/powershell/update-agent-context.ps1 -AgentType codex
    • These scripts detect which AI agent is in use
    • Update the appropriate agent-specific context file
    • Add only new technology from current plan
    • Preserve manual additions between markers

Output: data-model.md, /contracts/*, quickstart.md, agent-specific file

Key rules

  • Use absolute paths
  • ERROR on gate failures or unresolved clarifications

© foryourhealth111-pixel, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in bundled/skills/speckit-plan of foryourhealth111-pixel/Vibe-Skills.

Open the folder on GitHubat commit ddcaa2a

Compare with similar skills

Speckit Plan 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.

Speckit Plan compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Speckit Plan this skillforyourhealth111-pixel/Vibe-Skills3.6k—~870Automated safety check: PassApache-2.0
OpenSpec Guided OnboardingFission-AI/OpenSpec72k1 repos~4.5kAutomated safety check: PassMIT
Implementation Plan Writerimbue-ai/bouncer399—~2.1kAutomated safety check: PassAGPL-3.0
Speckit Implementkunstmusik/blue15418 repos~3.3kAutomated safety check: WarnGPL-3.0
Vibe Workflow RouterKhazP/vibe-coding-prompt-template3.1k—~544Automated safety check: NotesMIT
Spektacular Plan Implementationjumppad-labs/jumppad263—~1.8kAutomated safety check: PassMPL-2.0

Similar skills

  • OpenSpec Guided Onboarding

    Fission-AI/OpenSpec

    Walks you through a complete OpenSpec workflow cycle with narration while doing real work in your codebase.

    72k GitHub starsUsed in 1 repo~4.5k tokens
    Agent WorkflowsAuto-check passed

  • Implementation Plan Writer

    imbue-ai/bouncer

    Turns a feature's goals, requirements and architecture documents into a set of self-contained task files that a developer with no project context can follow.

    399 GitHub stars~2.1k tokensUpdated 3 days ago
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  • Speckit Implement

    kunstmusik/blue

    Execute the implementation plan by processing and executing all tasks defined in tasks.md

    154 GitHub starsUsed in 18 repos~3.3k tokens
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  • Vibe Workflow Router

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    Picks the next useful step for an app project, whether planning a new product, changing an existing app, fixing a bug or writing a handoff, loading only the context needed.

    3.1k GitHub stars~544 tokensUpdated 6 days ago
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  • Spektacular Plan Implementation

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    Executes an approved plan step by step through the spektacular CLI, which acts as the state machine, producing code, tests and a changelog.

    263 GitHub stars~1.8k tokensUpdated 9 days ago
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  • Spec-Driven Development

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    Runs a gated Spec, Plan, Build, Test, Review, Ship workflow so non-trivial changes are specified, verified and reviewed before they ship, with a named artifact per phase.

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Categories

Questions about Speckit Plan

What does Speckit Plan do?

Generate technical implementation plans from feature specifications. Speckit Plan is an agent skill from foryourhealth111-pixel/Vibe-Skills. Generate technical implementation plans from feature specifications.

When should I use Speckit Plan?

Speckit Plan fits situations like: tasks that involve Spec-driven development; tasks that involve Planning.

How do I install Speckit Plan in Claude Code?

Run `npx skills add foryourhealth111-pixel/Vibe-Skills --skill speckit-plan -a claude-code`. Or copy the skill folder (bundled/skills/speckit-plan in foryourhealth111-pixel/Vibe-Skills) into .claude/skills/speckit-plan in your project. Claude Code loads it when a task matches its description.

How do I install Speckit Plan in Codex?

Run `npx skills add foryourhealth111-pixel/Vibe-Skills --skill speckit-plan -a codex`. Or copy the skill folder (bundled/skills/speckit-plan in foryourhealth111-pixel/Vibe-Skills) into .agents/skills/speckit-plan in your project. Codex loads it when a task matches its description.

Can I use Speckit Plan 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 foryourhealth111-pixel/Vibe-Skills --skill speckit-plan -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/speckit-plan, .gemini/skills/speckit-plan, .github/skills/speckit-plan and .opencode/skills/speckit-plan in your project.

What does Speckit Plan need to run?

SKILL.md names no scripts, command-line tools or credentials: Speckit Plan is instructions for the agent only. Compatibility (from SKILL.md): Requires spec-kit project structure with .specify/ directory.

Does Speckit Plan 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 Speckit Plan 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 Speckit Plan use?

Speckit Plan is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Speckit Plan use?

About 870 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Speckit Plan?

Skills that share tags, products or a category with Speckit Plan: OpenSpec Guided Onboarding (Fission-AI/OpenSpec, 72k stars), Implementation Plan Writer (imbue-ai/bouncer, 399 stars), Speckit Implement (kunstmusik/blue, 154 stars) and Vibe Workflow Router (KhazP/vibe-coding-prompt-template, 3.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Speckit Plan?

foryourhealth111-pixel (a GitHub user) maintains it in foryourhealth111-pixel/Vibe-Skills, which has 3,627 GitHub stars. The repository holds 81 skills in this directory. The repository was last updated on August 31, 2026.

Source: foryourhealth111-pixel/Vibe-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.