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traefik: Instructions file for Claude Code

CLAUDE.md

traefik CLAUDE.md is an instructions file for Claude Code from freyr/traefik. It costs 559 tokens per session, scanned B, original, MIT.

A project instruction file for Traefik, a reverse proxy that routes web traffic to local services and provides HTTPS. It documents setup, service exposure rules, certificate handling, and daily commands.

In plain words
What is it for?
Use it when starting, stopping, creating, or removing the Traefik setup; exposing Docker services; copying certificates; and configuring or testing automatic renewal.
Why use it?
It gives agents the exact operational rules needed to manage local routing safely, including which services may be exposed and which certificate file and permissions are required.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is freyr/traefik's own configuration. It tells Claude Code how to work on traefik itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything traefik configures →

not rated 2repo 8mo ago B scan 559 tokens original MIT
View source ↗ freyr/traefik
Reuse

Borrowing it

Nothing to install: this file belongs to freyr/traefik. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/freyr/traefik/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/freyr/traefik

Made for: Claude Code.

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.

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README.md
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Your own site
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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 traefik CLAUDE.md

Your own site · 80×15
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Per session 559 This file is loaded in full into every session.
When invoked 559 The same file — it is already loaded in full.
Security scan B 1 finding. 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 $0.00559 $0.00559
Opus 5.5 $0.00224 $0.00224
Sonnet 5.5 $0.00112 $0.00112
Haiku 4.5 $0.00056 $0.00056

Measured 2mo ago against content hash f1a5187655ba, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

traefik CLAUDE.md scanned grade B with 1 finding 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 2mo 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- **TFK001**: First-time setup requires `sudo make create` — installs loopback alias LaunchDaemon on macOS.
CLAUDE.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Traefik

Local development reverse proxy routing HTTPS for *.example.dev via loopback alias 172.16.123.1.

Critical Rules

  • TFK001: First-time setup requires sudo make create — installs loopback alias LaunchDaemon on macOS.
  • TFK002: Services must opt in with traefik.enable=true label — exposedByDefault is false.
  • TFK003: SSL key must have 644 permissions — Docker container needs read access.
  • TFK004: Use fullchain.pem (not cert.pem) — includes intermediate certificates.

Quick Start

# One-time setup (requires sudo on macOS)
sudo make create           # Loopback alias + network + start Traefik

# Daily operations
make start                 # Start Traefik
make stop                  # Stop Traefik
make destroy               # Remove everything
make                       # Show help

Certificate Management

make setup-certs           # Copy Let's Encrypt certs to Traefik
make install-renew-hook    # Post-renewal hook
make setup-auto-renewal    # Automatic renewal (macOS LaunchDaemon)
make test-renewal          # Dry-run renewal test

Service Discovery

Add these Docker labels to expose a service:

labels:
  traefik.enable: true
  traefik.http.routers.<service>.tls: true
  traefik.http.routers.<service>.entrypoints: websecure
  traefik.http.routers.<service>.rule: "Host(`subdomain.example.dev`)"

Architecture

  • Traffic flow: Client → 172.16.123.1:443 → Traefik → containers on local Docker network
  • Static config: traefik.toml (entrypoints, providers)
  • TLS config: configs/certs.toml + ssl/ directory
  • Auto HTTP→HTTPS redirect; dashboard at https://traefik.example.dev
  • Platform setup: macOS (LaunchDaemon), Linux (systemd), Windows (manual)

References

Boundaries

NEVER:

  • Commit SSL private keys to git
  • Modify loopback alias config without testing connectivity afterward

Read the full file on GitHub · 68 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. 2mo ago First seen · 68 lines · 559 tokens per session scan B f1a5187655ba

Subscribe to this mod's changes

traefik CLAUDE.md is an instructions file published in the GitHub repository freyr/traefik (2 stars, last pushed 8mo ago), licensed MIT. It adds 559 tokens to every session, about $0.0022 per session on Opus 5.5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

CloudDevOps and cloud
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