validate-plan

validate-plan is a skill for Claude Code from coalesce-labs/catalyst. It costs 57 tokens per session (2,084 once invoked), scanned A, original, no licence file.

A checklist for checking whether an implementation plan was carried out correctly. It compares the completed work with the plan's phases and success criteria.

In plain words
What is it for?
Use it after implementing a plan, or when asked to verify that a plan was followed and its stated results were achieved.
Why use it?
It helps catch skipped steps or incomplete results after a planned change has been implemented.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the catalyst-dev plugin — 33 skills, 9 agents shipped together

Good fit Use it after implementing a plan, or when asked to verify that a plan was followed and its stated results were achieved.

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

Made for: Claude Code.

Or install catalyst-dev, the plugin that ships this one along with the rest of its 33 skills, 9 agents.

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 validate-plan

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/coalesce-labs/catalyst/validate-plan"><img src="https://agentmods.dev/badge/skills/coalesce-labs/catalyst/validate-plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,084 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 $0.00057 $0.02084
Opus 5.5 $0.00023 $0.00834
Sonnet 5.5 $0.00011 $0.00417
Haiku 4.5 $0.00006 $0.00208

Measured 1mo ago against content hash 3e7801c9cfb7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

validate-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 1mo 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.

plugins/dev/skills/validate-plan/SKILL.md · 259 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

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. 1mo ago Changed · +15 lines 3e7801c9cfb7
  2. 1mo ago First seen · 244 lines · 57 tokens per session scan A 247c27fe194a

Subscribe to this mod's changes

validate-plan is a skill published in the GitHub repository coalesce-labs/catalyst (20 stars, last pushed 26d ago), with no licence file. It adds 57 tokens to every session and 2,084 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-30.

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