scope-check

scope-check is a skill for Claude Code, Codex from momentmaker/kaijutsu. It costs 60 tokens per session (1,188 once invoked), scanned A, original, MIT.

A scope-tracking guide for comparing the original task with the work completed so far.

In plain words
What is it for?
Use it to check whether a coding task has grown beyond its starting goal and group the changes by area.
Why use it?
It shows how much the work has expanded, using changed files and lines instead of guesswork.

Skill for Claude CodeCodex

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

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/momentmaker/kaijutsu/scope-check
Any agent
npx skills add momentmaker/kaijutsu --skill scope-check
Clone the repo
git clone --depth 1 https://github.com/momentmaker/kaijutsu

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 scope-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/momentmaker/kaijutsu/scope-check.svg)](https://agentmods.dev/skills/momentmaker/kaijutsu/scope-check)
Your own site
<a href="https://agentmods.dev/skills/momentmaker/kaijutsu/scope-check"><img src="https://agentmods.dev/badge/skills/momentmaker/kaijutsu/scope-check.svg" alt="Measured on agentmods" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,188 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00060 $0.01188
Opus 5 $0.00030 $0.00594
Sonnet 5 $0.00012 $0.00238
Haiku 4.5 $0.00006 $0.00119

Measured 6d ago against content hash 63583f0809b9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

scope-check 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 6d 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.

skills/core/scope-check/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Scope Check

Hold up a mirror — compare the original task intent to the actual work done. Present data, not judgment.

Step 1: Find the Original Intent

Check these sources in order. Use the first one found:

  1. Active plan file — search your agent's plan/scratch directory for a plan referencing this project. Read the Goal and Context sections.
  2. Task list — if your agent has a tracked task list, the earliest task often captures the original intent.
  3. Ask the user — if neither exists, ask: "What was the original task or goal? I want to compare it to what's actually happened."

Step 2: Measure the Actual Work

Detect default branch first: git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's|refs/remotes/origin/||' — fall back to main if unset.

Run in parallel:

  • git diff --stat — unstaged changes
  • git diff --cached --stat — staged changes
  • git diff {default-branch}...HEAD --stat — all changes on this branch vs default (skip if current branch IS the default branch)
  • git ls-files --others --exclude-standard | wc -l — new untracked files
  • Count new vs modified files
  • Sum lines added/removed

Step 3: Categorize by Concern

Group changed files by their top-level directory or domain:

  • Read the list of changed files
  • Group by the first 2 path segments (e.g., Models/Proximity/, Scenes/ActiveWalk/, src/handlers/)
  • Count files and lines per group

Step 4: Check Time Spent

If your agent keeps a session log, count sessions and estimate total time spent on this project today and yesterday.

Step 4.5: Cost-tier classification

For each changed file, classify by reasoning space per the Agentic Coding Flywheel cost model:

Tier What it touches Rework cost
plan-space design docs, plans, architecture markdown, ADRs, READMEs
bead-space task lists, scope-of-work specs, project tracking, IMPLEMENTATION_PLAN.md, .beads/*
code-space actual implementation files, tests, configs 25×

Read the full file on GitHub · 105 lines

Files

What ships with it

3 files 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. 6d ago First seen · 105 lines · 60 tokens per session scan A 63583f0809b9

Subscribe to this mod's changes

scope-check is a skill published in the GitHub repository momentmaker/kaijutsu (3 stars, last pushed 2mo ago), licensed MIT. It adds 60 tokens to every session and 1,188 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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