Dev Environment Patterns SKILL.md skillB
Dev Environment Patterns from nxtg-ai/forge-plugin is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nxtg-ai/forge-plugin/Dev Environment Patterns@git:20261015.6ff23adPins git:20261015.6ff23ad in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nxtg-ai/forge-plugin
- Path
plugins/nxtg-forge/skills/dev-environment-patterns/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261015.6ff23ad, committed Oct 15, 2026
- First version recorded
- Feb 7, 2026
- Size
- 8,010 bytes
- Repository stars
- 6
- License
- MIT
Debug and configure local dev-server networking for multi-device access — Vite proxy, env-var URL priority, 0.0.0.0 binding, and WSL2 quirks. Use when API/fetch or WebSocket calls fail from a phone/tablet/other PC ("localhost refused", CORS blocked, NetworkError, WS won't connect), when a server is only reachable from localhost, when a leftover VITE_API_URL breaks dev, or when setting up network access on WSL2.
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
# Development Environment Patterns
Institutional knowledge for local dev-server networking, learned from real
forge-ui debugging. All code here mirrors the live config in
`forge-ui/vite.config.ts` and `forge-ui/src/services/api-client.ts` (ports:
UI 5050 → proxies to API/WS 5051).
---
## Pattern: Multi-Device Development Access
**Severity**: Critical (blocks all functionality from non-localhost devices).
### Symptom
API/WS calls fail only when accessed from a phone, tablet, or another PC:
- `Cross-Origin Request Blocked: localhost:5051`
- `NetworkError when attempting to fetch resource`
- WebSocket connection failures
### Root cause
`localhost` on the remote device points at *that device*, not the dev server.
Any URL that names `localhost` (hardcoded or via `VITE_API_URL`) is unreachable
off-machine. The fix is relative URLs proxied by Vite, so the browser only ever
talks same-origin to whatever host it loaded the page from.
### Correct pattern (matches live source)
```ts
// src/services/api-client.ts — env var wins, else relative /api in dev
const getApiBaseUrl = () => {
if (import.meta.env.VITE_API_URL) return import.meta.env.VITE_API_URL; // prod only
…Read the whole file at its exact version.
How to install
mdr add nxtg-ai/forge-plugin/Dev Environment Patterns@sha256:0f8e757f2005dc35The line at the top of this page pins the label git:20261015.6ff23ad, 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_zubwknzmlbgnctta)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Feb 7, 2026 and Oct 15, 2026, about one every 125 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261015.6ff23ad latest | 2026-10-15 | 6ff23ad | 8,010 B | B | view · diff |
| git:20260714.4fd0952 | 2026-07-14 | 4fd0952 | 8,016 B | B | view · diff |
| git:20260207.88c1f6e | 2026-02-07 | 88c1f6e | 4,347 B | B | view |
Audit of the latest version
- fail: No link to a raw IP address (matched: http://192.0.2.10:5050)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8010 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 script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
nxtg-ai/forge-plugin · 6 stars · license MIT · pushed 2026-10-15 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zubwknzmlbgnctta GET https://markdownregistry.com/api/v1/resolve?ref=nxtg-ai/forge-plugin/Dev Environment Patterns GET https://markdownregistry.com/api/v1/blob/0f8e757f2005dc357e8d832c0031ccc8bdc75e5ee39a1891e97055a432e11fef
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.