validate_plan

validate_plan is a command for coding agents from hoblin/claude-ruby-marketplace. It costs 11 tokens per session (1,114 once invoked), scanned A, a copy of validate_plan, MIT.

A command that checks whether an implementation matches its plan and success criteria. It uses repository history, file changes, and project checks such as tests to find deviations.

In plain words
What is it for?
Use it after an implementation to locate the plan, inspect relevant commits and files, run the appropriate checks, and report unresolved issues.
Why use it?
It reduces the chance of declaring work complete based only on a description or recent edits. It verifies what was meant to change against what actually exists.

Command

Part of the rpi plugin — 12 commands, 12 agents 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 commands/hoblin/claude-ruby-marketplace/validate_plan
Clone the repo
git clone --depth 1 https://github.com/hoblin/claude-ruby-marketplace

Or install rpi, the plugin that ships this one along with the rest of its 12 commands, 12 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/commands/hoblin/claude-ruby-marketplace/validate_plan.svg)](https://agentmods.dev/commands/hoblin/claude-ruby-marketplace/validate_plan)
Your own site
<a href="https://agentmods.dev/commands/hoblin/claude-ruby-marketplace/validate_plan"><img src="https://agentmods.dev/badge/commands/hoblin/claude-ruby-marketplace/validate_plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,114 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 94% copy Near-identical to another mod 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 $0.00011 $0.01114
Opus 5 $0.00005 $0.00557
Sonnet 5 $0.00002 $0.00223
Haiku 4.5 $0.00001 $0.00111

Measured 5d ago against content hash aded6f84ced9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 5d 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.

Origin

This is a copy

94% identical to validate_plan — 7 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/rpi/commands/validate_plan.md · 166 lines

How it starts

The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Validate Plan

You are tasked with validating that an implementation plan was correctly executed, verifying all success criteria and identifying any deviations or issues.

Initial Setup

When invoked:

  1. Determine context - Are you in an existing conversation or starting fresh?

    • If existing: Review what was implemented in this session
    • If fresh: Need to discover what was done through git and codebase analysis
  2. Locate the plan:

    • If plan path provided, use it
    • Otherwise, search recent commits for plan references or ask user
  3. Gather implementation evidence:

    # Check recent commits
    git log --oneline -n 20
    git diff HEAD~N..HEAD  # Where N covers implementation commits
    
    # Run comprehensive checks
    cd $(git rev-parse --show-toplevel) && make check test
    

Validation Process

Step 1: Context Discovery

If starting fresh or need more context:

  1. Read the implementation plan completely

  2. Identify what should have changed:

    • List all files that should be modified
    • Note all success criteria (automated and manual)
    • Identify key functionality to verify
  3. Spawn parallel research tasks to discover implementation:

    Task 1 - Verify database changes:
    Research if migration [N] was added and schema changes match plan.
    Check: migration files, schema version, table structure
    Return: What was implemented vs what plan specified
    
    Task 2 - Verify code changes:
    Find all modified files related to [feature].
    Compare actual changes to plan specifications.
    Return: File-by-file comparison of planned vs actual
    
    Task 3 - Verify test coverage:
    Check if tests were added/modified as specified.
    Run test commands and capture results.
    Return: Test status and any missing coverage
    

Step 2: Systematic Validation

For each phase in the plan:

  1. Check completion status:
    • Look for checkmarks in the plan (- [x])
    • Verify the actual code matches claimed completion

Read the full file on GitHub · 166 lines

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. 5d ago First seen · 166 lines · 11 tokens per session scan A aded6f84ced9

Subscribe to this mod's changes

validate_plan is a command published in the GitHub repository hoblin/claude-ruby-marketplace (37 stars, last pushed 25d ago), licensed MIT. It adds 11 tokens to every session and 1,114 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to validate_plan, differing in 7 lines, and is treated as a copy.