diff-review

diff-review is a skill for Claude Code, Codex from aaronnat23/disp8ch. It costs 0 tokens per session (64 once invoked), scanned A, original, MIT.

A review method for comparing two versions of code, prompts, settings, or workflow definitions. It presents changes as before-and-after differences or patches.

In plain words
What is it for?
Use it to review file changes, workflow nodes, configuration keys, and test coverage.
Why use it?
It makes behavioral changes, regressions, and missing tests easier to spot than a general description of what was edited.

Skill for Claude CodeCodex

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/aaronnat23/disp8ch/diff-review
Any agent
npx skills add aaronnat23/disp8ch --skill diff-review
Clone the repo
git clone --depth 1 https://github.com/aaronnat23/disp8ch

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 diff-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/aaronnat23/disp8ch/diff-review.svg)](https://agentmods.dev/skills/aaronnat23/disp8ch/diff-review)
Your own site
<a href="https://agentmods.dev/skills/aaronnat23/disp8ch/diff-review"><img src="https://agentmods.dev/badge/skills/aaronnat23/disp8ch/diff-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 64 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 $0.00000 $0.00064
Opus 5 $0.00000 $0.00032
Sonnet 5 $0.00000 $0.00013
Haiku 4.5 $0.00000 $0.00006

Measured 4d ago against content hash 6cc57b1d7fc3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

diff-review 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 4d 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.

extensions/diffs/skills/diff-review/SKILL.md · 8 lines

What it actually says

Diff Review

Use diff-style reasoning when comparing versions of code, prompts, configs, or workflow JSON.

  • Prefer before/after or patch summaries over vague edit descriptions.
  • Call out behavioral changes, regressions, and missing tests first.
  • Keep the summary tied to concrete files, nodes, or config keys.
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. 4d ago First seen · 8 lines · 0 tokens per session scan A 6cc57b1d7fc3

Subscribe to this mod's changes

diff-review is a skill published in the GitHub repository aaronnat23/disp8ch (98 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 64 tokens. 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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