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dotnet-managedcode-mimetypes SKILL.md skillA

dotnet-managedcode-mimetypes from postpartum-genushyacinthus29/dotnet-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add postpartum-genushyacinthus29/dotnet-skills/dotnet-managedcode-mimetypes@v1.0.0

Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: postpartum-genushyacinthus29/dotnet-skills
Path: skills/dotnet-managedcode-mimetypes/SKILL.md
Versions recorded: 1
Latest version: v1.0.0, committed Mar 15, 2026
Size: 1,802 bytes
Repository stars: 13
License: MIT

Use ManagedCode.MimeTypes when a .NET application needs consistent MIME type detection, extension mapping, and content-type decisions for uploads, downloads, or HTTP responses.

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

# ManagedCode.MimeTypes

## Trigger On

- integrating `ManagedCode.MimeTypes` into upload or download flows
- mapping file extensions to content types in APIs or background processing
- reviewing content-type handling for files, blobs, or attachments
- documenting a reusable MIME-type decision point in a .NET application

## Workflow

1. Identify where the application needs stable MIME-type decisions:
   - upload validation
   - download response headers
   - storage metadata
   - attachment processing
2. Centralize content-type mapping instead of scattering ad-hoc string tables across the codebase.
3. Use one library boundary for extension and MIME lookups.
4. Validate the extensions and media types that matter to the product.
5. Document any product-specific overrides separately from the library defaults.

```mermaid
flowchart LR
  A["File name or extension"] --> B["ManagedCode.MimeTypes lookup"]
  B --> C["Resolved MIME type"]
  C --> D["Upload validation, storage metadata, or HTTP response"]
```

## Deliver

- guidance on where MIME lookup belongs in application code
- recommendations for centralized content-type decisions
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add postpartum-genushyacinthus29/dotnet-skills/dotnet-managedcode-mimetypes@sha256:21d2d4fe5be278f2

The line at the top of this page pins the label v1.0.0, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_ble5667ivn7la7yf.svg)](https://markdownregistry.com/a/art_ble5667ivn7la7yf)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Mar 15, 2026.

version	committed	commit	size	audit
v1.0.0 latest	2026-03-15	a98c3c8	1,802 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (1802 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

GitHub

postpartum-genushyacinthus29/dotnet-skills · 13 stars · license MIT · pushed 2026-10-13 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ble5667ivn7la7yf
GET https://markdownregistry.com/api/v1/resolve?ref=postpartum-genushyacinthus29/dotnet-skills/dotnet-managedcode-mimetypes
GET https://markdownregistry.com/api/v1/blob/21d2d4fe5be278f24a54bef27f90d34db8568dc3ad97bd193fce17422085743c

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.