speckit-plan

speckit-plan is a skill for Claude Code, Codex from boussadjra/vuestrata. It costs 0 tokens per session (84 once invoked), scanned A, original, MIT.

A planning guide that turns an approved software specification into a detailed implementation plan. It records the plan in the project's specified feature folder.

In plain words
What is it for?
Use it before implementing a feature whose requirements have already been approved. It helps document design decisions, project rules, risks, and checks.
Why use it?
It gives developers a structured path from agreed requirements to code. It also makes technical risks, affected files, and validation steps explicit.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it before implementing a feature whose requirements have already been approved. It helps document design decisions, project rules, risks, and checks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/boussadjra/vuestrata/speckit-plan
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 boussadjra/vuestrata --skill speckit-plan
Clone the repo
git clone --depth 1 https://github.com/boussadjra/vuestrata

Made for: Claude Code, Codex.

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 speckit-plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/boussadjra/vuestrata/speckit-plan/github.svg)](https://agentmods.dev/skills/boussadjra/vuestrata/speckit-plan)
Your own site
<a href="https://agentmods.dev/skills/boussadjra/vuestrata/speckit-plan"><img src="https://agentmods.dev/badge/skills/boussadjra/vuestrata/speckit-plan/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 speckit-plan

Your own site · 80×15
<a href="https://agentmods.dev/skills/boussadjra/vuestrata/speckit-plan"><img src="https://agentmods.dev/badge/skills/boussadjra/vuestrata/speckit-plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 84 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 $0.00000 $0.00084
Opus 5 $0.00000 $0.00042
Sonnet 5 $0.00000 $0.00017
Haiku 4.5 $0.00000 $0.00008

Measured 12d ago against content hash a50c95b6def2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

speckit-plan 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 12d 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.

.github/skills/speckit-plan/SKILL.md · 12 lines

What it actually says

speckit-plan Skill

Use to turn an approved spec into an implementation plan.

Rules

  1. Read the constitution, plan template, and feature spec.md.
  2. Write a Constitution Check covering every principle.
  3. Show only affected paths in Project Structure.
  4. Define technical direction, risks, and validation.
  5. Write to .specify/specs/NNN-feature/plan.md.
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. 12d ago First seen · 12 lines · 0 tokens per session scan A a50c95b6def2

Subscribe to this mod's changes

speckit-plan is a skill published in the GitHub repository boussadjra/vuestrata (111 stars, last pushed 5d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 84 tokens. 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.

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