dev

dev is a skill for Claude Code, Codex from yonatangross/orchestkit. It costs 76 tokens per session (3,220 once invoked), scanned A, original, MIT.

A command that starts a project’s local development setup: the app server, stateful API mocks, a named local HTTPS address, and a browser session. It keeps this setup associated with the current Git branch.

In plain words
What is it for?
Use it when beginning or resuming branch work, checking the development setup, stopping its processes, or sharing a local preview with others.
Why use it?
Starting several development services by hand is repetitive and can cause port conflicts, especially when working on multiple branches or worktrees.

Skill for Claude CodeCodex

Part of the ork plugin — 68 skills, 35 commands, 36 agents, 32 hooks shipped together

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/yonatangross/orchestkit/dev
Any agent
npx skills add yonatangross/orchestkit --skill dev
Clone the repo
git clone --depth 1 https://github.com/yonatangross/orchestkit

Made for: Claude Code, Codex.

Or install ork, the plugin that ships this one along with the rest of its 68 skills, 35 commands, 36 agents, 32 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for dev

README.md
[![agentmods](https://agentmods.dev/badge/skills/yonatangross/orchestkit/dev.svg)](https://agentmods.dev/skills/yonatangross/orchestkit/dev)
Your own site
<a href="https://agentmods.dev/skills/yonatangross/orchestkit/dev"><img src="https://agentmods.dev/badge/skills/yonatangross/orchestkit/dev.svg" alt="Measured on agentmods" height="20"></a>
Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,220 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00076 $0.03220
Opus 5 $0.00038 $0.01610
Sonnet 5 $0.00015 $0.00644
Haiku 4.5 $0.00008 $0.00322

Measured yesterday against content hash 968395cf86e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

dev scanned grade A with 0 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 yesterday.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/boot.sh, scripts/status.sh, scripts/stop.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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/ork/skills/dev/SKILL.md · 256 lines

How it starts

The opening of the file, as written. The whole thing — 256 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/ork:dev — Lab-Stack Boot

One command boots the four moving parts of a Vercel-Labs-flavored dev loop:

  1. portless → named HTTPS https://<branch>.localhost (no port collisions across worktrees)
  2. emulate → stateful API emulators on the same origin via @emulators/adapter-next
  3. dev serverpnpm dev / npm run dev / yarn dev (auto-detected)
  4. agent-browser → pre-warmed session named after the branch

State lives in .claude/state/dev-stack.json. Teardown via /ork:dev stop reads the PIDs and signals SIGTERM in reverse boot order.

Paired with /ork:expect: the agent-browser session that /ork:dev warms is the same one /ork:expect (and the M125 #2 auto-trigger) attach to — no second startup latency on the first UI test.

When to invoke

Situation Command
Start work on a new branch /ork:dev
Resume after a session break /ork:dev (idempotent — skips already-live processes)
Tear down before deleting branch /ork:dev stop
Inspect state /ork:dev status
Share preview with stakeholder /ork:dev --share (tailnet) or /ork:dev --funnel (public)
Time-boxed live demo /ork:dev --live 4 (public funnel, 4-hour expiry)

Resuming a backgrounded dev session (CC 2.1.144+): Sessions started via claude --bg now appear in /resume alongside interactive ones, marked bg — use /resume as the direct recovery path after a crash or session end instead of navigating the agent view.

Background shell sessions (CC 2.1.154+): In claude agents, type ! <command> to run a shell command as a backgrounded session you can attach to and detach from — also available as claude --bg --exec '<command>'. Useful for long dev-loop processes (watchers, builds, servers) you want to monitor without holding a terminal.

Modes (M127)

Flag Wraps Reach Tailscale CLI
(none) portless <slug> <pkg-mgr> run dev https://<branch>.localhost only not required
--share portless --tailscale ... tailnet members on https://*.ts.net required
--funnel portless --funnel ... public on the internet required
--live N portless --funnel ... + N-hour expiry public, tracked in live-demos.jsonl required

Read the full file on GitHub · 256 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. yesterday First seen · 256 lines · 76 tokens per session scan A 968395cf86e0

Subscribe to this mod's changes

dev is a skill published in the GitHub repository yonatangross/orchestkit (225 stars, last pushed yesterday), licensed MIT. It adds 76 tokens to every session and 3,220 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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