Home / vargasjr-dev / mycadet-temp · GitHub

headless-claude-code SKILL.md skillA

headless-claude-code from vargasjr-dev/mycadet-temp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add vargasjr-dev/mycadet-temp/headless-claude-code@git:20261007.09b94d2

Pins git:20261007.09b94d2 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: vargasjr-dev/mycadet-temp
Path: skills/headless-claude-code/SKILL.md
Versions recorded: 5
Latest version: git:20261007.09b94d2, committed Oct 7, 2026
First version recorded: Apr 24, 2026
Size: 17,169 bytes
Repository stars: 47
License: MIT

Reference guide for running Claude Code in third-party headless, container, and CI environments. Covers auth strategies, interactive mode pitfalls, tmux orchestration, root user workarounds, and git auth without SSH agents or keychains.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Headless Claude Code

Running Claude Code outside a desktop terminal — in Docker containers, CI runners, cloud
VMs, or orchestrated by another process — is full of undocumented friction. This guide
covers everything we've learned getting CC to work reliably in these environments.

---

## 1. Authentication

CC tries multiple auth strategies in a fixed priority order. Understanding this chain is
the key to headless auth.

### Priority Order (highest → lowest)

1. **Cloud provider ambient credentials** — AWS Bedrock, GCP Vertex (auto-detected)
2. **`ANTHROPIC_AUTH_TOKEN`** — raw bearer token for Anthropic's API
3. **`ANTHROPIC_API_KEY`** — direct API key (pay-per-token, no Pro subscription features)
4. **`apiKeyHelper`** — executable that prints a token to stdout (set via `--settings`)
5. **`CLAUDE_CODE_OAUTH_TOKEN`** — OAuth token (Pro/Team subscription)
6. **`/login`** — interactive browser OAuth dance (unusable in headless)

### Recommended: `apiKeyHelper`

The most flexible headless strategy. Point CC at a script that returns a valid token:

```json
{
  "apiKeyHelper": "/path/to/your-auth-script"
}
```
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add vargasjr-dev/mycadet-temp/headless-claude-code@sha256:c2bd14241d514d85

The line at the top of this page pins the label git:20261007.09b94d2, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_2qv37kz253thjzjb.svg)](https://markdownregistry.com/a/art_2qv37kz253thjzjb)

0 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Apr 24, 2026 and Oct 7, 2026, about one every 42 days.

version	committed	commit	size	audit
git:20261007.09b94d2 latest	2026-10-07	09b94d2	17,169 B	A	view · diff
git:20261007.cbfc397	2026-10-07	cbfc397	17,170 B	A	view · diff
git:20260807.cd12932	2026-08-07	cd12932	17,171 B	A	view · diff
git:20260603.ff934d9	2026-06-03	ff934d9	17,039 B	A	view · diff
git:20260424.8098008	2026-04-24	8098008	17,011 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (17169 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

vargasjr-dev/mycadet-temp · 47 stars · license MIT · pushed 2026-11-03 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_2qv37kz253thjzjb
GET https://markdownregistry.com/api/v1/resolve?ref=vargasjr-dev/mycadet-temp/headless-claude-code
GET https://markdownregistry.com/api/v1/blob/c2bd14241d514d85bb5ffce7b21bf1175b3496f73f55bf2ecd7df6ba0beff694

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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