fe-doc-sync

fe-doc-sync is a skill for Claude Code from sh5623/fe-rail. It costs 77 tokens per session (2,947 once invoked), scanned A, original, MIT.

A documentation synchronizer that scans a project and updates its CLAUDE.md or README.md to match the actual code and structure.

In plain words
What is it for?
Use it after structural or technology changes in a project, including projects with multiple packages in a monorepo, meaning one repository containing several related applications or packages.
Why use it?
Project documentation can become outdated when routes, components, dependencies, folders, or frameworks change. This helps expose those differences.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions CLAUDE.md; mentions AGENTS.md.

Part of the fe-rail plugin — 5 skills, 15 agents, 4 hooks shipped together

Good fit Use it after structural or technology changes in a project, including projects with multiple packages in a monorepo, meaning one repository containing several related applications or packages.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sh5623/fe-rail/fe-doc-sync
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 sh5623/fe-rail --skill fe-doc-sync
Clone the repo
git clone --depth 1 https://github.com/sh5623/fe-rail

Made for: Claude Code.

Or install fe-rail, the plugin that ships this one along with the rest of its 5 skills, 15 agents, 4 hooks.

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 fe-doc-sync

README.md
[![agentmods](https://agentmods.dev/badge/skills/sh5623/fe-rail/fe-doc-sync/github.svg)](https://agentmods.dev/skills/sh5623/fe-rail/fe-doc-sync)
Your own site
<a href="https://agentmods.dev/skills/sh5623/fe-rail/fe-doc-sync"><img src="https://agentmods.dev/badge/skills/sh5623/fe-rail/fe-doc-sync/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 fe-doc-sync

Your own site · 80×15
<a href="https://agentmods.dev/skills/sh5623/fe-rail/fe-doc-sync"><img src="https://agentmods.dev/badge/skills/sh5623/fe-rail/fe-doc-sync.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,947 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 $0.00077 $0.02947
Opus 5 $0.00039 $0.01473
Sonnet 5 $0.00015 $0.00589
Haiku 4.5 $0.00008 $0.00295

Measured 10d ago against content hash 628cd3251229, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

fe-doc-sync 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 10d 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/fe-doc-sync/SKILL.md · 260 lines

How it starts

The opening of the file, as written. The whole thing — 260 lines — stays where its author put it; the contents beside it link to each section on GitHub.

fe-doc-sync — 사용자 프로젝트 문서 동기화 스킬

이 스킬은 fe-rail 플러그인 자체가 아니라, 이 플러그인을 설치한 사용자 프로젝트 (예: Vibe App, 모노레포 등)에서 호출됩니다. 호출 시점의 작업 디렉토리(cwd)를 기준으로 프로젝트 전반을 스캔해 해당 프로젝트의 CLAUDE.md / README.md 가 실제 코드와 일치하도록 동기화합니다.

중요: 사용자 프로젝트에 CLAUDE.md 또는 README.md 가 없다면 생성을 제안한다. 단, 새 파일을 임의로 만들지 말고 Phase 4 수정안 → Phase 5 승인 절차를 거친다.


Phase 1: 프로젝트 식별 및 전체 스캔

(A) 프로젝트 타입 감지

package.json 을 읽어 프레임워크와 구조를 판별한다.

# 루트 + 모노레포 앱들의 package.json 위치
fd -t f -e json --max-depth 4 --hidden -E node_modules -E .next -E dist 'package.json' . 2>/dev/null \
  || find . -maxdepth 4 -name package.json -not -path '*/node_modules/*' -not -path '*/.next/*' -not -path '*/dist/*'

# 워크스페이스 여부
cat package.json 2>/dev/null | grep -E '"workspaces"|"packageManager"'

판별 매트릭스:

package.json 의존성 판별
next Next.js 앱 (App Router 여부는 app/ vs pages/ 존재로 추가 판별)
vite + @tanstack/react-router Vite SPA (TanStack Router)
vite + (react-router 또는 react-router-dom) v7 이상 Vite SPA (React Router 7·8) — 데이터는 TanStack Query 단독 소유. v8 은 react-router-dom 제거됨
vite + react-router-dom v6 이하 Vite SPA (React Router 레거시)
workspaces 필드 존재 + apps/·packages/ 모노레포
react-native RN Web (참고만, fe-rail 주 대상 아님)

(B) 프로젝트 구조 스캔

# 핵심 디렉토리 트리 (깊이 3까지)
fd -t d --max-depth 3 -E node_modules -E .next -E dist -E .git . 2>/dev/null \
  || find . -maxdepth 3 -type d -not -path '*/node_modules/*' -not -path '*/.next/*' -not -path '*/dist/*' -not -path '*/.git/*'

# 라우트 파일 카운트
# - Next App Router
fd 'page\.(tsx|ts|jsx|js)$' app 2>/dev/null | wc -l
# - Next Pages Router
fd '\.(tsx|ts|jsx|js)$' pages 2>/dev/null | wc -l
# - TanStack Router
fd '\.(tsx|ts)$' src/routes 2>/dev/null | wc -l

# 주요 디렉토리 카운트
for d in components hooks lib services stores api features; do
  count=$(fd -t f --max-depth 5 . "$d" 2>/dev/null | wc -l | tr -d ' ')
  [ "$count" != "0" ] && echo "$d: $count"
done

# 모노레포면 apps/ packages/ 목록
ls -1 apps/ packages/ 2>/dev/null

Read the full file on GitHub · 260 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. 10d ago First seen · 260 lines · 77 tokens per session scan A 628cd3251229

Subscribe to this mod's changes

fe-doc-sync is a skill published in the GitHub repository sh5623/fe-rail (1 stars, last pushed 5d ago), licensed MIT. It adds 77 tokens to every session and 2,947 once invoked, about $0.0004 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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