github-auth

A setup guide for connecting a coding agent to GitHub, using Git or the GitHub command-line tool. It covers access tokens, SSH keys, saved credentials, and sign-in checks.

In plain words
What is it for?
Use it to configure GitHub access over HTTPS or SSH, save credentials safely, or check whether GitHub authentication is already working.
Why use it?
It removes the guesswork from choosing and configuring a way for the agent to access GitHub repositories.

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/neolabs-systems/neoagent/github-auth
Any agent
npx skills add NeoLabs-Systems/NeoAgent --skill github-auth
Clone the repo
git clone --depth 1 https://github.com/NeoLabs-Systems/NeoAgent

Made for: Claude Code, Codex.

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,964 The whole file, excluding the scripts and references it only reads on demand.
Security scan F 4 findings. Scan, not verified.
Origin unknown 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 $0.00048 $0.01964
Opus 5 $0.00024 $0.00982
Sonnet 5 $0.00010 $0.00393
Haiku 4.5 $0.00005 $0.00196

Measured 2d ago against content hash cfa444cb6622, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade F, and why

github-auth scanned grade F with 4 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 2d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/gh-env.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Enumerates the file system for secretshighData exfiltration

Searching home directories for .env, .ssh, .aws or credential files is reconnaissance for credential theft.

ls -la ~/.ssh/id_*.pub 2>/dev/null || echo "No SSH keys found"

Asks for rootmediumPrivilege escalation

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

3. If `gh` is not installed → use "git-only" method below (no sudo needed)

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

ssh-keygen -t ed25519 -C "[email protected]" -f ~/.ssh/id_ed25519 -N ""

Makes network callslowCapability

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

When `gh` is not available, you can still access the full GitHub API using `curl` with a personal access token. This is how the other GitHub skills implement their fallbacks.
server/catalog_sources/store-bundles/skills/github/github-auth/SKILL.md · 247 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 247 lines · 48 tokens per session scan F cfa444cb6622

Subscribe to this mod's changes

github-auth is a skill published in the GitHub repository NeoLabs-Systems/NeoAgent (23 stars, last pushed 2d ago), licensed AGPL-3.0. It adds 48 tokens to every session and 1,964 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it F with 4 findings (enumerates the file system for secrets, asks for root, reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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