plan

plan is a skill for Claude Code, Codex, Cursor from YSAA1/harness-workflow. It costs 68 tokens per session (2,196 once invoked), scanned A, original, no licence file.

A planning workflow that turns an approved specification or clear non-trivial request into an executable plan, including the work slice and checks needed.

In plain words
What is it for?
Use it to define the work area, validation path, missing capabilities, and commit unit before coding.
Why use it?
It prevents implementation from starting when the requirements or verification approach are still unclear.

Skill for Claude CodeCodexCursor

Part of the harness-workflow plugin — 12 skills shipped together

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.

agentmods
npx agentmods add skills/ysaa1/harness-workflow/plan
Any agent
npx skills add YSAA1/harness-workflow --skill plan
Clone the repo
git clone --depth 1 https://github.com/YSAA1/harness-workflow

Made for: Claude Code, Codex, Cursor.

Or install harness-workflow, the plugin that ships this one along with the rest of its 12 skills.

Per session 68 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,196 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00068 $0.02196
Opus 5 $0.00034 $0.01098
Sonnet 5 $0.00014 $0.00439
Haiku 4.5 $0.00007 $0.00220

Measured 3d ago against content hash d29f51b8ca4f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 3d 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.

.cursor/skills/plan/SKILL.md · 148 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file 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. 3d ago First seen · 148 lines · 68 tokens per session scan A d29f51b8ca4f

Subscribe to this mod's changes

plan is a skill published in the GitHub repository YSAA1/harness-workflow (2 stars, last pushed 21d ago), with no licence file. It adds 68 tokens to every session and 2,196 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 2026-08-31.

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