coding-assistant

coding-assistant is a skill for Claude Code, Codex from chinkan/RustFox. It costs 13 tokens per session (200 once invoked), scanned A, original, MIT.

A general guide for writing, reviewing, and debugging software code.

In plain words
What is it for?
Use it for coding requests, code reviews, debugging, targeted edits, and suggestions for testing changes.
Why use it?
It encourages reading existing code first, making focused changes, finding bugs and security issues, and explaining the cause of failures.

Skill for Claude CodeCodex

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

Good fit Use it for coding requests, code reviews, debugging, targeted edits, and suggestions for testing changes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/chinkan/rustfox/coding-assistant
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 chinkan/RustFox --skill coding-assistant
Clone the repo
git clone --depth 1 https://github.com/chinkan/RustFox

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 coding-assistant

README.md
[![agentmods](https://agentmods.dev/badge/skills/chinkan/rustfox/coding-assistant/github.svg)](https://agentmods.dev/skills/chinkan/rustfox/coding-assistant)
Your own site
<a href="https://agentmods.dev/skills/chinkan/rustfox/coding-assistant"><img src="https://agentmods.dev/badge/skills/chinkan/rustfox/coding-assistant/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 coding-assistant

Your own site · 80×15
<a href="https://agentmods.dev/skills/chinkan/rustfox/coding-assistant"><img src="https://agentmods.dev/badge/skills/chinkan/rustfox/coding-assistant.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 200 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 $0.00013 $0.00200
Opus 5.5 $0.00005 $0.00080
Sonnet 5.5 $0.00003 $0.00040
Haiku 4.5 $0.00001 $0.00020

Measured 1mo ago against content hash c9e672710ec9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

coding-assistant 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.

skills/coding-assistant/SKILL.md · 26 lines

What it actually says

Coding Assistant

When the user asks for help with code:

  1. Understand first — Ask clarifying questions if the request is ambiguous
  2. Read before writing — Use read_file to understand existing code before modifying
  3. Small changes — Make focused, minimal changes. Don't refactor unrelated code
  4. Explain your reasoning — Briefly explain what you changed and why
  5. Test awareness — Suggest how to test the changes if applicable

When reviewing code:

  • Point out bugs, security issues, and performance problems
  • Suggest improvements but don't over-engineer
  • Be specific — reference line numbers and provide fixed code

When debugging:

  • Ask for error messages and reproduction steps
  • Use execute_command to investigate (check logs, run tests)
  • Explain the root cause, not just the fix
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 · 26 lines · 13 tokens per session scan A c9e672710ec9

Subscribe to this mod's changes

coding-assistant is a skill published in the GitHub repository chinkan/RustFox (10 stars, last pushed today), licensed MIT. It adds 13 tokens to every session and 200 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 2026-08-31.

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