gen-env SKILL.md skillA
gen-env from aiskillstore/marketplace is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add aiskillstore/marketplace/gen-env@git:20260113.222b7dePins git:20260113.222b7de in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- aiskillstore/marketplace
- Path
skills/0xbigboss/gen-env/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260113.222b7de, committed Jan 13, 2026
- Size
- 7,988 bytes
- Repository stars
- 471
- License
- none declared
Creates, updates, or reviews a project's gen-env command for running multiple isolated instances on localhost. Handles instance identity, port allocation, data isolation, browser state separation, and cleanup.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# gen-env Skill
Generate or review a `gen-env` command that enables running **multiple isolated instances** of a project on localhost simultaneously (e.g., multiple worktrees, feature branches, or versions).
## The Problem
Without isolation, multiple instances of the same project:
- Fight for hardcoded ports (3000, 5432, 8080)
- Share Docker volumes → data corruption
- Share browser cookies/localStorage → auth confusion
- Have ambiguous container names → can't tell which is which
- Risk catastrophic cleanup → `docker down -v` nukes everything
## The Solution: Instance Identity
Everything flows from a **workspace name**:
```
name = "feature-x"
↓
┌─────────────────────────────────────────────────────┐
│ COMPOSE_PROJECT_NAME = localnet-feature-x │
│ DOCKER_NETWORK = localnet-feature-x │
│ VOLUME_PREFIX = localnet-feature-x │
│ CONTAINER_PREFIX = localnet-feature-x- │
│ TILT_HOST = feature-x.localhost │
│ Ports = dynamically allocated │
│ URLs = derived from host + ports │
└─────────────────────────────────────────────────────┘
```
…Read the whole file at its exact version.
How to install
mdr add aiskillstore/marketplace/gen-env@sha256:8a506941ba677cc9The line at the top of this page pins the label git:20260113.222b7de, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ktnl6r2j2x24o64f)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jan 13, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7988 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
aiskillstore/marketplace · 471 stars · license none declared · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ktnl6r2j2x24o64f GET https://markdownregistry.com/api/v1/resolve?ref=aiskillstore/marketplace/gen-env GET https://markdownregistry.com/api/v1/blob/8a506941ba677cc9062ce03e1e71aaa8aa46b979c4730240fe9ffa0ca65c8be8
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.