latitude-llm: Skill for Claude Code

.agents/skills/explain-diff-html/SKILL.md

explain-diff-html is a skill for Claude Code, Codex from latitude-dev/latitude-llm. It costs 32 tokens per session (639 once invoked), scanned A, original, MIT.

A tool for turning a code change, branch, or pull request into an interactive HTML explanation with background, examples, diagrams, a code walkthrough, and a quiz.

In plain words
What is it for?
Use it to explain what a change does, why it was made, and how its main parts fit together.
Why use it?
It helps readers understand unfamiliar changes without piecing together the surrounding code themselves.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is latitude-dev/latitude-llm's own configuration. It tells Claude Code and Codex how to work on latitude-llm itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything latitude-llm configures →

About the project

Latitude is an open-source platform for monitoring AI agents by collecting execution traces, grouping failures, dispatching coding agents to make fixes, and replaying failures to verify them. Teams use it to observe agent behavior, investigate errors, and monitor whether fixes prevent regressions. The catalogue entries include skills, instructions, and an MCP server for working with Latitude.

latitude-dev/latitude-llm · 4,734 stars · on GitHub · latitude.so

Reuse

Borrowing it

Nothing to install: this file belongs to latitude-dev/latitude-llm. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/latitude-dev/latitude-llm/development/.agents/skills/explain-diff-html/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/latitude-dev/latitude-llm

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 explain-diff-html

README.md
[![agentmods](https://agentmods.dev/badge/skills/latitude-dev/latitude-llm/explain-diff-html/github.svg)](https://agentmods.dev/skills/latitude-dev/latitude-llm/explain-diff-html)
Your own site
<a href="https://agentmods.dev/skills/latitude-dev/latitude-llm/explain-diff-html"><img src="https://agentmods.dev/badge/skills/latitude-dev/latitude-llm/explain-diff-html/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 explain-diff-html

Your own site · 80×15
<a href="https://agentmods.dev/skills/latitude-dev/latitude-llm/explain-diff-html"><img src="https://agentmods.dev/badge/skills/latitude-dev/latitude-llm/explain-diff-html.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 639 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00032 $0.00639
Opus 5.5 $0.00013 $0.00256
Sonnet 5.5 $0.00006 $0.00128
Haiku 4.5 $0.00003 $0.00064

Measured 1mo ago against content hash 5bafcb8a6550, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

explain-diff-html 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.agents/skills/explain-diff-html/SKILL.md · 30 lines

What it actually says

Explain Diff

Please make me a rich, interactive explanation of the specified code change.

It should have these sections:

  • Background: Explain the existing system relevant to this change. (You should broadly explore surrounding code for this.) We don't know how much the reader already knows, so include a deep background for beginners (note that it can be skipped if the reader is already familiar), and then a more narrow background directly relevant to the change.
  • Intuition: Explain the core intuition for the code change. The focus here is to explain the essence, not the full details. Use concrete examples with toy data. Use figures and diagrams liberally.
  • Code: Do a high-level walkthrough of the changes to the code. Group/order the changes in an understandable way.
  • Quiz: Come up with five questions that test the reader's knowledge of this PR. This should be medium difficulty, difficult enough that you actually need to understand the substance of the PR to answer them, but not gotchas. The goal is to help the reader make sure that they've actually understood. These should be presented as interactive multiple-choice questions, and when the user clicks, it tells them whether they were correct and gives feedback.

Format:

  • Output a single self-contained HTML file which includes CSS and JavaScript. Make the whole thing one long page with section headers and a table of contents. Don't use tabs for the top-level structure. Basic responsive styling so you can view it on a phone is nice too. Put the file in a global place on my computer outside of the code repo, and make sure the filename always starts with today's date in YYYY-MM-DD- format, because it helps keep the files time-sorted and out of version control. For example: /tmp/2026-01-12-explanation-.html
  • Please write with the clarity and flow of Martin Kleppmann, making it engaging and written in classic style. Transitions between sections should be smooth.
  • Some tips on diagrams. Ideally, you should pick a small number of diagram families that can be reused throughout the explanation to explain various cases. Some useful kinds of diagrams:
    • A very simplified version of the UI that the user sees in the app, to explain UI changes.
    • A system diagram showing data flow or communication between components. Make sure to include example data here!
  • Don't use ASCII diagrams. Always use simple HTML designs for your diagrams, HTML lists for lists of things, etc.
    • For code blocks, always use <pre> tags. If you use a custom styled div instead, it must have white-space: pre-wrap in its CSS, or the browser will collapse all newlines into a single line. Before saving the file, scan each code block in the HTML source and confirm its CSS includes white-space: pre or pre-wrap.
  • Use callouts for key concepts or definitions, important edge cases, etc.
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 First seen · 30 lines · 32 tokens per session scan A 5bafcb8a6550

Subscribe to this mod's changes

explain-diff-html is a skill published in the GitHub repository latitude-dev/latitude-llm (4,734 stars, last pushed yesterday), licensed MIT. It adds 32 tokens to every session and 639 once invoked, about $0.0001 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.