code-comment

A code-documentation helper that adds explanatory comments without changing how the program works.

In plain words
What is it for?
It is for adding useful comments to selected functions, files, or code sections, then checking that only comments changed.
Why use it?
It makes non-obvious decisions, assumptions, side effects, and edge cases easier for future readers to understand.

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/agenturehq/agenture-loop/code-comment
Any agent
npx skills add AgentureHQ/agenture-loop --skill code-comment
Clone the repo
git clone --depth 1 https://github.com/AgentureHQ/agenture-loop

Made for: Claude Code, Codex.

Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 638 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 $0.00051 $0.00638
Opus 5 $0.00026 $0.00319
Sonnet 5 $0.00010 $0.00128
Haiku 4.5 $0.00005 $0.00064

Measured yesterday against content hash c8b584ec5aec, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-comment 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 yesterday.

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/agn/skills/code-comment/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Comment

Add meaningful comments to source code without altering its behavior.

Workflow

  1. Determine scope — identify what the user wants commented: a specific function, a file, a selection, or a set of files.
  2. Read the code — understand the logic, control flow, and data structures before writing anything.
  3. Add comments — apply the rules below, using the correct comment syntax for the language.
  4. Verify — confirm the code is unchanged aside from added comments. Run linters if available.

What to Comment

  • Why, not what — explain intent, trade-offs, and constraints the code itself cannot convey.
  • Non-obvious algorithms or business logic.
  • Assumptions, invariants, and known limitations.
  • Important side effects (I/O, mutations, external calls).
  • Edge cases and error-handling rationale.
  • Public API surface: function/class purpose, parameters, return values.

What NOT to Comment

  • Obvious operations (i += 1 // increment i).
  • Code that is self-documenting through clear naming.
  • Restating the code in English (// loop through items above a for-loop).
  • Commented-out code — remove dead code instead.
  • Change history — that belongs in version control.

Comment Style

  • Use the language's idiomatic comment syntax and doc-comment conventions:
    • Python: # inline, """docstrings""" for modules/classes/functions
    • JS/TS: // inline, /** JSDoc */ for exports
    • Go: // with godoc conventions
    • Rust: /// doc-comments, // inline
    • Java/Kotlin: /** Javadoc */ for public API, // inline
    • Other languages: follow their standard conventions
  • Keep comments concise — one or two sentences per block.
  • Place comments on the line above the code they describe, at the same indentation level.
  • For multi-line explanations, use a block/doc-comment rather than stacking single-line comments.

Safety Rules

  • NEVER modify code logic, formatting, or structure — only add comments.
  • NEVER remove or rewrite existing comments unless they are demonstrably wrong.
  • Preserve all original whitespace and line breaks.

Read the full file on GitHub · 74 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. yesterday First seen · 74 lines · 51 tokens per session scan A c8b584ec5aec

Subscribe to this mod's changes

code-comment is a skill published in the GitHub repository AgentureHQ/agenture-loop (2 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 51 tokens to every session and 638 once invoked, about $0.0003 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.

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