n8n-self-hosted-diagnostics

n8n-self-hosted-diagnostics is a skill for Claude Code, Codex from humanerd-drew/opencode-drewgent. It costs 0 tokens per session (1,559 once invoked), scanned B, original, MIT.

A guide for diagnosing and managing a self-hosted n8n installation on macOS. n8n is a tool for connecting services and automating workflows; self-hosted means it runs on your own computer or server.

In plain words
What is it for?
Use it to manage an npm-installed n8n process with macOS launchd, inspect its status and logs, and locate its local settings and SQLite database.
Why use it?
It gives the locations and commands needed to check whether n8n is running and to start, stop, restart, update, or inspect it. It also identifies its data, database, configuration, and log files.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit Use it to manage an npm-installed n8n process with macOS launchd, inspect its status and logs, and locate its local settings and SQLite database.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/humanerd-drew/opencode-drewgent/n8n-self-hosted-diagnostics
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 humanerd-drew/opencode-drewgent --skill n8n-self-hosted-diagnostics
Clone the repo
git clone --depth 1 https://github.com/humanerd-drew/opencode-drewgent

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 n8n-self-hosted-diagnostics

README.md
[![agentmods](https://agentmods.dev/badge/skills/humanerd-drew/opencode-drewgent/n8n-self-hosted-diagnostics.svg)](https://agentmods.dev/skills/humanerd-drew/opencode-drewgent/n8n-self-hosted-diagnostics)
Your own site
<a href="https://agentmods.dev/skills/humanerd-drew/opencode-drewgent/n8n-self-hosted-diagnostics"><img src="https://agentmods.dev/badge/skills/humanerd-drew/opencode-drewgent/n8n-self-hosted-diagnostics.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,559 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 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 $0.00000 $0.01559
Opus 5 $0.00000 $0.00779
Sonnet 5 $0.00000 $0.00312
Haiku 4.5 $0.00000 $0.00156

Measured 7d ago against content hash 9b5b57832347, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade B, and why

n8n-self-hosted-diagnostics scanned grade B with 2 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 7d 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

**확인**: `curl -X POST -H 'Content-Type: application/json' -d '{"content":"test"}' <webhook_url>`

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -o /dev/null -w "%{http_code}" http://localhost:5678
skills/automation/n8n-self-hosted-diagnostics/SKILL.md · 173 lines

How it starts

The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.


title: n8n Self-Hosted Diagnostics name: n8n-self-hosted-diagnostics description: npm으로 설치된 n8n 셀프호스트 상태 진단 + launchd 관리 스킬 type: skill space: outcome tags: [skill, n8n, self-hosted, diagnostics] created: 2026-06-01 updated: 2026-06-01 links:

  • "[[@action/skills/SKILL-INDEX]]"
  • "[[skills/automation/DESCRIPTION]]"
  • "[[@identity/brain/rules]]"---

n8n Self-Hosted Diagnostics

npm으로 설치된 n8n 셀프호스트의 상태를 진단하고 launchd로 관리하는 스킬.

환경 (2026-06-01 기준)

  • 설치: npm global (/opt/homebrew/lib/node_modules/n8n)
  • 실행 경로: /opt/homebrew/bin/n8n → symlink to npm package
  • 데이터 경로: ~/.n8n/
  • DB: ~/.n8n/database.sqlite (SQLite)
  • 설정: ~/.n8n/config (JSON — encryptionKey 포함)
  • 포트: 5678
  • launchd plist: ~/Library/LaunchAgents/ai.{{AGENT_NAME_LOWER}}.n8n.plist
  • 로그: ~/P6-prefrontal/logs/n8n.log, n8n.error.log
  • launchd label: ai.{{AGENT_NAME_LOWER}}.n8n
  • 업데이트: npm update -g n8n (Homebrew formula 없음)

launchd 관리

# 상태 확인
launchctl list | grep n8n

# 수동 시작
launchctl start ai.{{AGENT_NAME_LOWER}}.n8n

# 수동 정지
launchctl stop ai.{{AGENT_NAME_LOWER}}.n8n

# 재시작
launchctl stop ai.{{AGENT_NAME_LOWER}}.n8n && sleep 2 && launchctl start ai.{{AGENT_NAME_LOWER}}.n8n

# plist reload
launchctl unload ~/Library/LaunchAgents/ai.{{AGENT_NAME_LOWER}}.n8n.plist
launchctl load ~/Library/LaunchAgents/ai.{{AGENT_NAME_LOWER}}.n8n.plist

재부팅 시 RunAtLoad: true로 자동 시작됩니다.

진단 체크리스트

# 1. launchd 상태
launchctl list | grep n8n

# 2. 프로세스 확인
ps aux | grep n8n | grep -v grep

# 3. 포트 LISTEN 확인
lsof -i :5678

# 4. HTTP 응답 확인
curl -s -o /dev/null -w "%{http_code}" http://localhost:5678

# 5. 데이터 디렉토리
ls -la ~/.n8n/

# 6. 로그 확인
tail -20 ~/P6-prefrontal/logs/n8n.log
tail -20 ~/P6-prefrontal/logs/n8n.error.log

계정 복구 — SQLite 직접 초기화 (bcrypt 해시 교체)

n8n은 bcrypt 해시 사용. UI "Forgot my password"가 작동하지 않는 경우 SQLite에서 직접 bcrypt 해시를 교체.

핵심: bcrypt 해시 — $2b$ vs $2a$

최신 n8n (2025~2026)은 $2b$ prefix도 인식함.

import bcrypt, sqlite3, os

DB = os.path.expanduser('~/.n8n/database.sqlite')
new_password = '새비밀번호'

# bcrypt 해시 생성
salt = bcrypt.gensalt(rounds=10)
hashed_str = bcrypt.hashpw(new_password.encode(), salt).decode()

# 유저 확인
conn = sqlite3.connect(DB)
cur = conn.execute('SELECT id, email FROM "user"')
for row in cur.fetchall():
    print(row)

# 비밀번호 업데이트
conn.execute('UPDATE "user" SET password = ? WHERE email = ?', (hashed_str, '대상@이메일.com'))
conn.commit()

# 검증
row = conn.execute('SELECT password FROM "user" WHERE email = ?', ('대상@이메일.com',)).fetchone()
print(f'해시 검증: {bcrypt.checkpw(new_password.encode(), row[0].encode())}')
conn.close()
print('완료 — http://localhost:5678 에서 로그인 시도')

Read the full file on GitHub · 173 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. 7d ago First seen · 173 lines · 0 tokens per session scan B 9b5b57832347

Subscribe to this mod's changes

n8n-self-hosted-diagnostics is a skill published in the GitHub repository humanerd-drew/opencode-drewgent (2 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,559 tokens. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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