explain-code

A code-explanation aid that describes how software modules behave, how data moves through them, and which types or interfaces matter.

In plain words
What is it for?
Use it to answer how a function or module works, trace inputs and outputs, explain side effects and errors, and identify important edge cases.
Why use it?
It gives a concise explanation tied to exact file and line locations, so readers can verify claims in the source instead of guessing from a broad summary.

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/pilinux/gorest/explain-code
Any agent
npx skills add pilinux/gorest --skill explain-code
Clone the repo
git clone --depth 1 https://github.com/pilinux/gorest

Made for: Claude Code, Codex.

Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 236 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 $0.00023 $0.00236
Opus 5 $0.00012 $0.00118
Sonnet 5 $0.00005 $0.00047
Haiku 4.5 $0.00002 $0.00024

Measured 2d ago against content hash 30f49dcbcf28, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

explain-code 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 2d 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.

.agents/skills/explain-code/SKILL.md · 36 lines

What it actually says

Explain Code

When to Use

  • The user asks "how does X work?" or needs a human-readable overview tied to exact code locations.

Rules

  • Read-only and source-cited: every non-trivial claim must include path:line.
  • Keep summaries short and pragmatic. Focus on inputs/outputs, side effects, and error handling.

Output

  • What it does: 1-4 sentences.
  • How it works: 3-6 bullets with path:line citations for key statements.
  • Key types/APIs: short list with path:line.
  • Edge cases / invariants: 1-3 bullets.

Examples

  • "Explain handler.Login behavior and where passwords are hashed."
  • "How does the JWT blacklist work end-to-end?"
  • file-reader (low-level excerpts), code-navigation (impact mapping)
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. 2d ago First seen · 36 lines · 23 tokens per session scan A 30f49dcbcf28

Subscribe to this mod's changes

explain-code is a skill published in the GitHub repository pilinux/gorest (502 stars, last pushed 4d ago), licensed MIT. It adds 23 tokens to every session and 236 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 2026-08-30.

Related

Other skills, from other repositories