system-text-json-net11 SKILL.md skillA
system-text-json-net11 from dotnet/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dotnet/skills/system-text-json-net11@git:20261005.c6ec97bPins git:20261005.c6ec97b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dotnet/skills
- Path
plugins/dotnet11/skills/system-text-json-net11/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261005.c6ec97b, committed Oct 5, 2026
- First version recorded
- May 4, 2026
- Size
- 15,762 bytes
- Repository stars
- 5,836
- License
- MIT
Imperative guidance for the System.Text.Json APIs added in .NET 11: the built-in `JsonNamingPolicy.PascalCase` naming policy, and the strongly-typed generic `JsonSerializerOptions.GetTypeInfo` and `JsonSerializerOptions.TryGetTypeInfo` metadata accessors (generic overloads that return a typed `JsonTypeInfo`). USE ONLY when the user is targeting net11.0 or later and needs PascalCase JSON property or dictionary-key names without writing a custom naming policy, a strongly-typed generic…
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
# System.Text.Json — .NET 11 Three APIs were added to `System.Text.Json` in .NET 11. This skill tells you exactly when to reach for each one, what to write, what **not** to write, and how to prove the result runs. Do not describe these APIs to the user — apply them, then run the code and show the output. | API | Replaces the pre-.NET-11 workaround of... | | --- | --- | | `JsonNamingPolicy.PascalCase` (static property) | writing a custom `JsonNamingPolicy` subclass or hand-annotating every member with `[JsonPropertyName]` | | `JsonSerializerOptions.GetTypeInfo<T>()` | calling non-generic `GetTypeInfo(typeof(T))` and casting to `JsonTypeInfo<T>` | | `JsonSerializerOptions.TryGetTypeInfo<T>(out JsonTypeInfo<T>? info)` | wrapping `GetTypeInfo` in `try`/`catch` to probe availability | ## Step 0 — Make the requested `net11.0` validation possible These APIs only exist in the .NET 11 base class library. Before writing code: 1. Run `dotnet --list-sdks` and confirm an SDK that can target `net11.0` is present — an `11.x` SDK, or a later SDK with the `net11.0` targeting pack. 2. If the user explicitly asks you to run the sample and no suitable SDK is installed, …
Read the whole file at its exact version.
How to install
mdr add dotnet/skills/system-text-json-net11@sha256:e067f1ad212f97bdThe line at the top of this page pins the label git:20261005.c6ec97b, 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_lwospeuq27fz2w4u)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between May 4, 2026 and Oct 5, 2026, about one every 51 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261005.c6ec97b latest | 2026-10-05 | c6ec97b | 15,762 B | A | view · diff |
| git:20260831.a7a6170 | 2026-08-31 | a7a6170 | 15,731 B | A | view · diff |
| git:20260724.9b27066 | 2026-07-24 | 9b27066 | 13,385 B | A | view · diff |
| git:20260504.2633d3d | 2026-05-04 | 2633d3d | 3,476 B | A | view |
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 (15762 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
dotnet/skills · 5,836 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lwospeuq27fz2w4u GET https://markdownregistry.com/api/v1/resolve?ref=dotnet/skills/system-text-json-net11 GET https://markdownregistry.com/api/v1/blob/e067f1ad212f97bd11510505748f2ed87b51b3e0328b27fb8116c01a86817e7d
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.