speckit-plan

speckit-plan is a skill for Claude Code, Codex from ldilov/harness-forge. It costs 19 tokens per session (1,423 once invoked), scanned A, original, GPL-3.0.

An implementation-planning step that turns a feature description into design documents using a standard template.

In plain words
What is it for?
Use it to outline how a requested feature should be built and record the resulting design details.
Why use it?
It gives a feature a written technical plan before coding begins, reducing unclear decisions during implementation.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to outline how a requested feature should be built and record the resulting design details.

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

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/ldilov/harness-forge/speckit-plan.svg)](https://agentmods.dev/skills/ldilov/harness-forge/speckit-plan)
Your own site
<a href="https://agentmods.dev/skills/ldilov/harness-forge/speckit-plan"><img src="https://agentmods.dev/badge/skills/ldilov/harness-forge/speckit-plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,423 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 unknown 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 $0.00019 $0.01423
Opus 5 $0.00010 $0.00711
Sonnet 5 $0.00004 $0.00285
Haiku 4.5 $0.00002 $0.00142

Measured 7d ago against content hash 8f23b270185a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, 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 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.

.agents/skills/speckit-plan/SKILL.md · 148 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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 First seen · 148 lines · 19 tokens per session scan A 8f23b270185a

Subscribe to this mod's changes

speckit-plan is a skill published in the GitHub repository ldilov/harness-forge (4 stars, last pushed 3mo ago), licensed GPL-3.0. It adds 19 tokens to every session and 1,423 once invoked, about $0.0001 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 2026-08-31.

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