dev-experience

dev-experience is a skill for Claude Code, Codex from paruff/uFawkesAI. It costs 23 tokens per session (517 once invoked), scanned A, original, MIT.

A setup guide for a local software development environment, including development containers, workspace bootstrapping, local simulations, and command-line tools. A development container is a ready-made environment for coding a project.

In plain words
What is it for?
Use it to configure container images, editor extensions, ports, mounted folders, dependencies, environment variables, Git hooks, IDE settings, local clusters, and supporting services.
Why use it?
It reduces the manual setup needed before developers can run, test, and change a project locally.

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/paruff/ufawkesai/dev-experience
Any agent
npx skills add paruff/uFawkesAI --skill dev-experience
Clone the repo
git clone --depth 1 https://github.com/paruff/uFawkesAI

Made for: Claude Code, Codex.

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-experience

README.md
[![agentmods](https://agentmods.dev/badge/skills/paruff/ufawkesai/dev-experience.svg)](https://agentmods.dev/skills/paruff/ufawkesai/dev-experience)
Your own site
<a href="https://agentmods.dev/skills/paruff/ufawkesai/dev-experience"><img src="https://agentmods.dev/badge/skills/paruff/ufawkesai/dev-experience.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 517 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 $0.00023 $0.00517
Opus 5 $0.00012 $0.00259
Sonnet 5 $0.00005 $0.00103
Haiku 4.5 $0.00002 $0.00052

Measured 5d ago against content hash 73ace95d6ea8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

dev-experience 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 5d 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.

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.

.agents/skills/dev-experience/SKILL.md · 103 lines

What it actually says

Skill: Dev Experience

Load trigger: "load dev-experience skill" > DORA: Cap 3 (AI-Accessible Internal Data) Token cost: Low

Purpose

Set up local development environment for fast feedback loops.

Responsibilities

  • Configure devcontainers
  • Bootstrap workspace
  • Set up local simulation
  • Configure CLI tools
  • Validate environment

Sub-Skills

Skill Purpose
dev-experience/devcontainer Configure devcontainers
dev-experience/workspace Bootstrap workspace
dev-experience/local-sim Set up local simulation

Dependencies

Skill Relationship
(none) Foundation skill, no dependencies

Inputs

  • Project requirements
  • Language/framework
  • Tool requirements

Outputs

  • .devcontainer/devcontainer.json
  • Makefile or justfile
  • .env.example

Setup Rules

Devcontainer

  • Base image defined
  • Extensions configured
  • Ports forwarded
  • Volume mounts set
  • Post-create command defined

Workspace

  • Dependencies installed
  • Environment variables set
  • Git hooks configured
  • IDE settings configured

Local Simulation

  • Local cluster configured (kind/k3d)
  • Services deployed locally
  • Observability stack running
  • Development workflow documented

Output Format

{
  "skill": "dev-experience",
  "status": "pass | fail",
  "artifacts": {
    "devcontainer": ".devcontainer/devcontainer.json",
    "makefile": "Makefile",
    "env_example": ".env.example"
  },
  "validation": {
    "devcontainer_valid": true,
    "workspace_ready": true,
    "local_sim_running": false
  }
}

Success Criteria

  • Devcontainer configured
  • Workspace bootstrapped
  • Local simulation available (optional)
  • Development workflow documented
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. 5d ago First seen · 103 lines · 23 tokens per session scan A 73ace95d6ea8

Subscribe to this mod's changes

dev-experience is a skill published in the GitHub repository paruff/uFawkesAI (2 stars, last pushed 12d ago), licensed MIT. It adds 23 tokens to every session and 517 once invoked, about $0.0001 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 2026-08-31.

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