explain

explain is a skill for Claude Code, Codex from a1f/agent-templates. It costs 48 tokens per session (1,334 once invoked), scanned A, original, MIT.

A command for explaining a software task or pull request in everyday language. A pull request is a proposed code change submitted for review.

In plain words
What is it for?
Use it to explain a numbered project slice, pull-request row, or GitHub pull request. It finds the matching plan or request and produces a short explanation of why it matters and what changes.
Why use it?
It helps someone understand the purpose and impact of a change without reading the whole code diff or knowing the project's terminology.

Skill for Claude CodeCodex

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

Good fit Use it to explain a numbered project slice, pull-request row, or GitHub pull request. It finds the matching plan or request and produces a short explanation of why it matters and what changes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/a1f/agent-templates/explain
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 a1f/agent-templates --skill explain
Clone the repo
git clone --depth 1 https://github.com/a1f/agent-templates

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/a1f/agent-templates/explain/github.svg)](https://agentmods.dev/skills/a1f/agent-templates/explain)
Your own site
<a href="https://agentmods.dev/skills/a1f/agent-templates/explain"><img src="https://agentmods.dev/badge/skills/a1f/agent-templates/explain/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

Your own site · 80×15
<a href="https://agentmods.dev/skills/a1f/agent-templates/explain"><img src="https://agentmods.dev/badge/skills/a1f/agent-templates/explain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,334 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00048 $0.01334
Opus 5.5 $0.00019 $0.00534
Sonnet 5.5 $0.00010 $0.00267
Haiku 4.5 $0.00005 $0.00133

Measured 2mo ago against content hash 02b7f58eb776, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

explain 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 2mo 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/explain/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Explain

Explain a slice or a PR in plain words — for someone who has never seen the code.

Do it the way Thing Explainer does — hard things in common words, so a pencil becomes a "writing stick." Show the impact, not the mechanics.

/explain <id> [--issue=N]

  <id> = a slice (4, 7), a PR row (4.2, 5.1), or a GitHub PR (#92)

  1. Find  the slice or PR   (don't guess; ask if unsure)
  2. Read  just enough       (the row + the "why", never the whole diff)
  3. Write it plain          (2–3 short paragraphs)

Phase 1 — Find the slice or PR

Resolve <id> in this order:

  1. Empty → ask which slice or PR they mean (or offer the current branch's PR, gh pr view --json title,body).
  2. #92 or PR 92 → a GitHub PR. gh pr view 92 --json title,body,files; take the "why" from its body (no such PR → ask). Go to Phase 3.
  3. A bare or dotted number → open the plan issue (gh issue view <N> --json body). Match the id whole against both tables. The table it sits in decides: PR breakdown → PR row, slice table → slice (including a hand-inserted 4.5). Whole-cell, so 4.2 ≠ 14.2.
  4. No single match → a whole number may be a GitHub PR; confirm "Did you mean PR #?" before gh pr view <id> --json title,body. If it errors, the id is dotted, or both tables match, ask which they mean.
  5. Anything else (a word, a slug) → ask which slice or PR they mean.

Find the plan issue: --issue=N if given, else gh issue list --state all --label Plan, then gh issue list --state all --search "Build plan in:body". One match, use it; many, narrow then ask; zero, ask — show the issue # and title.

Phase 2 — Read just enough

Pull the facts, not the whole diff:

  • Slice or PR row → its row, and the issue's ## The problem / ## What we're building for the "why". For a slice, also the PRs under it; for a PR row, its parent slice.
  • A PR row often links its merged PR (a #number); else find it unmistakably (gh pr list --state all --search "<words from the row>") and read its title and body. On zero or many matches, stay with the issue facts.

Read the full file on GitHub · 115 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. 2mo ago First seen · 115 lines · 48 tokens per session scan A 02b7f58eb776

Subscribe to this mod's changes

explain is a skill published in the GitHub repository a1f/agent-templates (2 stars, last pushed 2mo ago), licensed MIT. It adds 48 tokens to every session and 1,334 once invoked, about $0.0002 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 2026-08-31.

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