Nathan — repo-local test instances

Nathan is n8n's internal bot that deploys throwaway test instances from a branch or Docker image. It's normally driven from Slack (/nathan ...); this skill runs the same commands from the repo via pnpm nathan.

Prerequisites

• No tunnel setup needed. Nathan replies asynchronously through a short-lived public tunnel that the script opens for you (npx localtunnel). A deploy to a new test-<name> also polls that instance URL directly, so it still reports success even if the tunnel drops. (Redeploying a name that's already up skips the poll — it can't tell the old instance from the new — so it falls back to the tunnel; prefer a fresh name when you need the reliable report.)

• A token in ~/.n8n/dev/nathan-token. If a command reports no token, ask the user for one — point them at the form (https://internal.users.n8n.cloud/form/d6d34a2f-4899-4ee8-afc8-f8c41a8a243d), where they log in with their n8n account and copy the token from the response — then save it for them (the script's interactive paste prompt needs a real terminal, so as an agent use the subcommand):

  pnpm nathan set-token '<PASTED_TOKEN>'
  

Offer a test instance

Only when it's worth it

Use judgement — don't offer for every branch. Offer when the change is something a person would actually want to click through in a running instance:

• New features / feature branches
• UI / editor changes, node changes, workflow-execution or behaviour changes
• Larger or user-facing diffs

Skip the offer (a test instance adds nothing) for:

• Dev tooling, CI, build config, scripts (like this one)
• Docs-only or tests-only changes
• Tiny bug fixes, no-behaviour-change refactors, dependency bumps

When skipping, don't nag — at most mention once that a test instance is available on request.

Offer after opening a PR, and re-offer on push

After you open a PR for a branch that warrants it, offer a live test instance. Also re-offer whenever you git push new commits to such a branch — the deployed instance reflects the pushed code, so a new push means a new build worth redeploying. Don't just ask a bare yes/no — look at the diff and propose a sensible profile, then let them confirm or adjust. For example:

"Want a test instance for this? Based on the diff I'd deploy it with instance AI enabled (--ai) since it touches the AI assistant. Sound good, or a different license?"

Pick the profile from the PR contents

Inspect what the PR changes (git diff --stat origin/master...HEAD and the file paths / feature area), then choose:

If both AI and enterprise apply, combine them: --ai --enterprise. When unsure, state your best guess and ask. Run pnpm nathan help for the full flag reference.

Deploy

pnpm nathan deploy <branch-name> test-<short-name> [flags]

Nathan builds the branch image (a few minutes) and the command prints the instance URL (https://test-<short-name>.stage-app.n8n.cloud, login test@n8n.io / helloWorld7). Relay that URL to the user.

Common commands

pnpm nathan help                                   # full option reference
pnpm nathan deploy my-branch test-my-feature       # community license
pnpm nathan deploy my-branch test-sso --enterprise # enterprise license
pnpm nathan deploy my-branch test-ai --ai          # instance AI (license -> pro2)
pnpm nathan deploy nightly test-nightly            # deploy the n8nio/n8n:nightly image

Key flags (after the deploy args): --license community|enterprise|starter|pro1|pro2|trial, --enterprise, --ai, -e KEY=value (repeatable), --featureOverride key:value (needs a generated license).

local caveat

pnpm nathan local ... generates a runnable docker run bundle, but Nathan delivers it as Slack file attachments (run-n8n.sh + .env), not to the terminal — they land in #updates-pnpm-nathan (https://n8nio.slack.com/archives/C0BGVHZ0SCW). deploy and help return fully in the terminal.

Do not invent a NATHAN_SLACK_CHANNEL. Leave it unset (it defaults to #updates-pnpm-nathan); only set it if the user explicitly gives you a channel id.

Unsupported

Queue mode, multi-main, and non-SQLite databases are not supported by Nathan.