cf-scan

cf-scan is a skill for Claude Code, Codex from dinhanhthi/coding-friend. It costs 55 tokens per session (3,207 once invoked), scanned A, original, MIT.

A project-scanning workflow that examines a codebase and saves an organized description of its structure and technology.

In plain words
What is it for?
Use it to document the architecture, coding conventions, technology stack, features, and infrastructure of a project.
Why use it?
It gives later coding sessions a starting record of the project instead of making the agent rediscover the same context each time.

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/dinhanhthi/coding-friend/cf-scan
Any agent
npx skills add dinhanhthi/coding-friend --skill cf-scan
Clone the repo
git clone --depth 1 https://github.com/dinhanhthi/coding-friend

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 cf-scan

README.md
[![agentmods](https://agentmods.dev/badge/skills/dinhanhthi/coding-friend/cf-scan.svg)](https://agentmods.dev/skills/dinhanhthi/coding-friend/cf-scan)
Your own site
<a href="https://agentmods.dev/skills/dinhanhthi/coding-friend/cf-scan"><img src="https://agentmods.dev/badge/skills/dinhanhthi/coding-friend/cf-scan.svg" alt="Measured on agentmods" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,207 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 $0.00055 $0.03207
Opus 5 $0.00028 $0.01604
Sonnet 5 $0.00011 $0.00641
Haiku 4.5 $0.00006 $0.00321

Measured 5d ago against content hash 61e7ee084f09, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cf-scan 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 5d 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.

plugin-antigravity/skills/cf-scan/SKILL.md · 313 lines

How it starts

The opening of the file, as written. The whole thing — 313 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/cf-scan

CLI Requirement: OPTIONAL — Uses the memory MCP from coding-friend-cli for fast indexed search and storage. Without the CLI: falls back to grep over docs/memory/ and direct file writes. Full functionality preserved, slower memory recall. See CLI requirements.

Scan the project and bootstrap the memory system. User input: $ARGUMENTS

Purpose

New projects start with empty memory. This skill scans the codebase, extracts structured knowledge (architecture, conventions, tech stack, features, infrastructure), and stores it as memories. Safe to run multiple times — existing memories are updated, not duplicated.

Folder

Output goes to {docsDir}/memory/ (default: docs/memory/). Check .coding-friend/config.json for custom docsDir if it exists.

IMPORTANT — path resolution:

  • Use MAIN_REPO_ROOT from the SessionStart bootstrap context (injected via session-init.sh). If absent, fall back to running pwd for $CWD and use $CWD as MAIN_REPO_ROOT.
  • Read config from CF_CONFIG_FILE (= $MAIN_REPO_ROOT/.coding-friend/config.json) — do NOT search sub-folders
  • Use CF_DOCS_ROOT as the docs base dir (= $MAIN_REPO_ROOT/{docsDir} where docsDir comes from config, default docs)
  • Always resolve file_path as an absolute path: {CF_DOCS_ROOT}/memory/{category}/{name}.md
  • Never use relative paths in write specs — they may resolve incorrectly when the working directory contains nested git repos

Workflow

Step 0: Custom Guide

Custom guide — auto-loaded below (if the raw command shows instead of its output, run it yourself):

bash "<plugin-root>/lib/load-custom-guide.sh" cf-scan

If output is not empty, integrate returned sections: ## Before → before first step, ## Rules → apply throughout, ## After → after final step.

Step 0.5: Context Budget Check

Before proceeding, assess context budget:

  • If context is above 50%, prefer selective reads (Read with offset/limit) over full file reads
  • Limit cf-explorer exploration depth — map structure broadly but only deep-read files directly relevant to memory creation
  • If context is above 70%, warn the user that scan quality may degrade and suggest running in a fresh session

Read the full file on GitHub · 313 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. 5d ago First seen · 313 lines · 55 tokens per session scan A 61e7ee084f09

Subscribe to this mod's changes

cf-scan is a skill published in the GitHub repository dinhanhthi/coding-friend (3 stars, last pushed yesterday), licensed MIT. It adds 55 tokens to every session and 3,207 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.