jhub-deploy

A deployment guide for building and running web applications on JupyterHub named servers. JupyterHub is a shared service that gives users separate computing environments.

In plain words
What is it for?
Use it to deploy frontends and backends, check application status, and stop or delete running deployments through the JupyterHub API.
Why use it?
It provides a defined way to check access, required runtimes, and application dependencies before deploying, reducing failures caused by missing setup.

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/nebari-dev/pi-coding-agent-pack/jhub-deploy
Any agent
npx skills add nebari-dev/pi-coding-agent-pack --skill jhub-deploy
Clone the repo
git clone --depth 1 https://github.com/nebari-dev/pi-coding-agent-pack

Made for: Claude Code, Codex.

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,706 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00037 $0.03706
Opus 5 $0.00018 $0.01853
Sonnet 5 $0.00007 $0.00741
Haiku 4.5 $0.00004 $0.00371

Measured 2d ago against content hash 3bf7cee42abc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

jhub-deploy scanned grade A 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 2d 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.

Makes network callslowCapability

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

curl -fsS -H "Authorization: token $API_TOKEN" \
skills/shared-skills/jhub-deploy/SKILL.md · 438 lines

How it starts

The opening of the file, as written. The whole thing — 438 lines — stays where its author put it; the contents beside it link to each section on GitHub.

JHub Arbitrary Deploy Skill

Use this skill when the user wants agents to:

  • build arbitrary frontend/backend apps,
  • deploy them through JupyterHub,
  • manage lifecycle (status/stop/delete) via Hub API directly,
  • avoid framework-specific preference and avoid mandatory image push.

This skill piggybacks on JupyterHub named servers.


1) Preconditions

Resolve Hub API context from runtime:

API_URL="${NEBARI_HUB_API_URL:-${JUPYTERHUB_API_URL:-}}"
API_TOKEN="${NEBARI_HUB_API_TOKEN:-${JUPYTERHUB_API_TOKEN:-}}"
HUB_USER="${JUPYTERHUB_USER:-${NB_USER:-}}"

[ -n "$API_URL" ] || echo "Missing API_URL"
[ -n "$API_TOKEN" ] || echo "Missing API_TOKEN"
[ -n "$HUB_USER" ] || echo "Missing HUB_USER"

Validate token can read own user:

curl -fsS -H "Authorization: token $API_TOKEN" \
  "$API_URL/users/$HUB_USER?include_stopped_servers=true" >/dev/null

If this fails, stop and report missing scopes/credentials.

1.1) Runtime dependency preflight (MUST run)

Before selecting command/image strategy, verify required runtime dependencies for the target app.

Examples:

  • shell-out binaries (pdftotext, ffmpeg, etc.)
  • language runtimes/toolchains
  • expected package managers/build tools

If required binaries are missing in target image/runtime:

  • either switch to image mode,
  • or include bootstrap installation/fallback logic explicitly,
  • or fail fast with clear remediation.

2) Deployment modes (default = no image push)

A) Source-on-home mode (conditional, not assumed)

  • Build/install app on user home/workspace (/home/jovyan/...)
  • Spawn named server to run command from that path
  • No image push required

Critical rule: use source-on-home mode only if shared storage between build context and target named server is confirmed.

B) Bootstrap-on-target mode (safe default when storage is uncertain)

  • Treat target named server as isolated storage
  • Build/write artifacts inside target server startup flow
  • Prefer Python bootstrap wrapper that prepares files then execs runtime

Read the full file on GitHub · 438 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. 2d ago First seen · 438 lines · 37 tokens per session scan A 3bf7cee42abc

Subscribe to this mod's changes

jhub-deploy is a skill published in the GitHub repository nebari-dev/pi-coding-agent-pack (2 stars, last pushed 7d ago), licensed Apache-2.0. It adds 37 tokens to every session and 3,706 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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