Depot GitHub Runners

What it does

When your agent uses it

• Migrating GitHub Actions workflows to use Depot runners
• Choosing runner sizes (CPU/RAM)
• Configuring runs-on labels
• Troubleshooting GitHub Actions runner issues

Example prompts

• “Use the depot-github-runners skill to configure Depot-managed GitHub Actions runners as a drop-in replacement for GitHub-hosted runners”
• “/depot-github-runners”

Requirements

• Docker
• A credential in DEPOT_TOKEN

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

1. 1Depot dashboard → GitHub Actions → Connect to GitHub → Install Depot GitHub App
2. 2For public repos: GitHub org settings → Actions → Runner groups → Default → "Allow public repositories"
3. 3Update runs-on in your workflow files

What it can do on your machine

Read from SKILL.md and the folder at commit 2c48221. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • turbo
  • bazel

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • depot.dev

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • DEPOT_TOKEN

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Depot GitHub Runners loads about 2.8k tokens when it runs. Until then it costs about 176 tokens; SKILL.md has 942 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~176

When it runs · the whole SKILL.md, loaded when a task matches

~2.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from PostHog/posthog-foss at commit 2c48221, republished under its MIT licence (© PostHog). 942 words, ~2,805 tokens.

name

depot-github-runners

description

Configures Depot-managed GitHub Actions runners as a drop-in replacement for GitHub-hosted runners. Use when setting up or migrating GitHub Actions workflows to use Depot runners, choosing runner sizes (CPU/RAM), configuring runs-on labels, setting up ARM or Windows or macOS runners, troubleshooting GitHub Actions runner issues, configuring egress filtering, using Depot Cache with GitHub Actions, or running Dagger/Dependabot on Depot runners. Also use when the user mentions depot-ubuntu, depot-windows, depot-macos runner labels, or asks about faster/cheaper GitHub Actions runners. Not for Depot CI, the separate engine that reads .depot/workflows/ — that is the depot-ci skill.

<!-- PostHog-local section. Keep it when resyncing from upstream; see UPSTREAM.md. -->

<!-- End PostHog-local section. -->

depot org show              # Current org ID
depot org list              # Orgs the user belongs to
depot org switch <org-id>   # Optional: set default org

jobs:
  build:
    # Before:
    # runs-on: ubuntu-latest
    # After:
    runs-on: depot-ubuntu-24.04-4
    steps:
      - uses: actions/checkout@v4
      - run: npm ci
      - run: npm test

# ❌ WRONG — multiple labels cause stability issues
runs-on: [self-hosted, depot-ubuntu-24.04]

# ✅ CORRECT — always use a single Depot runner label
runs-on: depot-ubuntu-24.04-4

runs-on: depot-ubuntu-latest,dagger=0.18.4

{
  "acls": [
    {
      "action": "accept",
      "src": ["tag:depot-runner"],
      "dst": ["database-hostname"]
    }
  ]
}

{
  "acls": [
    {
      "action": "accept",
      "src": ["tag:depot-runner"],
      "dst": ["192.0.2.0/24:*"]
    }
  ]
}

steps:
  - uses: actions/checkout@v4
  - uses: mxschmitt/action-tmate@v3
  - run: npm test

© PostHog, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in .agents/skills/depot-github-runners of PostHog/posthog-foss.

• SKILL.md
• UPSTREAM.md

Open the folder on GitHubat commit 2c48221