What is review-delta?

A focused review tool for uncommitted code changes and the other files or functions they may affect. The blast radius means the wider part of the codebase that could be impacted by a change.

Use it for quick local reviews of changed files, affected callers, inheritance changes, code snippets, and test-coverage gaps.

It helps find risks before a commit, including missing tests and changes that affect many related parts of the program.

review-delta — Skill for Claude Code by n24q02m

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 n24q02m/claude-plugins --skill review-delta

Clone the repo

git clone --depth 1 https://github.com/n24q02m/claude-plugins

Made for: Claude Code.

Or install better-code-review-graph, the plugin that ships this one along with the rest of its 6 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/n24q02m/claude-plugins/review-delta/github.svg)](https://agentmods.dev/skills/n24q02m/claude-plugins/review-delta)

Your own site

<a href="https://agentmods.dev/skills/n24q02m/claude-plugins/review-delta"><img src="https://agentmods.dev/badge/skills/n24q02m/claude-plugins/review-delta/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/n24q02m/claude-plugins/review-delta"><img src="https://agentmods.dev/badge/skills/n24q02m/claude-plugins/review-delta.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 663 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00022	$0.00663
Opus 5	$0.00011	$0.00331
Sonnet 5	$0.00004	$0.00133
Haiku 4.5	$0.00002	$0.00066

Measured 10d ago against content hash 0930aa6ef6d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

review-delta 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 10d 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/better-code-review-graph/skills/review-delta/SKILL.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review Delta

Perform a focused, token-efficient code review of uncommitted changes and their blast radius. Use this for quick local reviews BEFORE committing. For full branch/PR reviews, use review-pr instead.

Command surface: run the local CLI through the coding harness shell. Examples use the installed better-code-review-graph command; from a source checkout, prefix it with uv run. No MCP mapping is required. Use better-code-review-graph review --help for the command reference.

Steps

Ensure the graph is current with better-code-review-graph graph build --base HEAD --repo-root "<path>".
Get review context with better-code-review-graph review context --base HEAD --repo-root "<path>". This returns:
- Changed files (auto-detected from git diff)
- Impacted nodes and files (blast radius)
- Source code snippets for changed areas
- Review guidance (test coverage gaps, wide impact warnings, inheritance concerns)
Analyze the blast radius by reviewing the impacted_nodes and impacted_files in the JSON result. Focus on:
- Functions whose callers changed (may need signature/behavior verification)
- Classes with inheritance changes (Liskov substitution concerns)
- Files with many dependents (high-risk changes)
Perform the review using the context. For each changed file:
- Review the source snippet for correctness, style, and potential bugs
- Check if impacted callers/dependents need updates
- Verify test coverage with better-code-review-graph query query --pattern tests_for --target "<function>" --repo-root "<path>"
- Flag any untested changed functions

Report findings in a structured format:

## Delta Review

### Summary
<One-line overview of the changes>

### Risk Level
- **Low**: Test-only changes, documentation, config files
- **Medium**: Implementation changes with <5 impacted files, no public API changes
- **High**: >5 impacted files OR public API signature/behavior change

### Issues Found
- <Bugs, style issues, missing tests>

### Blast Radius
- <List of impacted files/functions>

### Recommendations
1. <Actionable suggestion>

Read the full file on GitHub · 72 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.

10d ago First seen · 72 lines · 22 tokens per session scan A 0930aa6ef6d7

Subscribe to this mod's changes

review-delta is a skill published in the GitHub repository n24q02m/claude-plugins (4 stars, last pushed yesterday), licensed Apache-2.0. It adds 22 tokens to every session and 663 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.

Claude Code Code review anthropic claude hooks marketplace mcp

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