aspnet-core-knowledge-patch

aspnet-core-knowledge-patch is a skill for Claude Code, Codex from Nevaberry/nevaberry-plugins. It costs 11 tokens per session (1,891 once invoked), scanned A, original, MIT.

A reference guide for ASP.NET Core, Microsoft's framework for building web applications and services with .NET. It covers current behavior and changes across components, forms, hosting, security, testing, APIs, and related areas.

In plain words
What is it for?
Use it when working on Blazor, forms, HTTP hosting, migrations, identity, SignalR, OpenAPI, minimal APIs, or JSON behavior in ASP.NET Core.
Why use it?
It helps developers check for breaking changes and use guidance that matches the application they are implementing, reviewing, testing, or upgrading.

Skill for Claude CodeCodex

Part of the knowledge-patch plugin — 57 skills, 1 hook shipped together

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/nevaberry/nevaberry-plugins/aspnet-core-knowledge-patch
Any agent
npx skills add Nevaberry/nevaberry-plugins --skill aspnet-core-knowledge-patch
Clone the repo
git clone --depth 1 https://github.com/Nevaberry/nevaberry-plugins

Made for: Claude Code, Codex.

Or install knowledge-patch, the plugin that ships this one along with the rest of its 57 skills, 1 hook.

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 aspnet-core-knowledge-patch

README.md
[![agentmods](https://agentmods.dev/badge/skills/nevaberry/nevaberry-plugins/aspnet-core-knowledge-patch.svg)](https://agentmods.dev/skills/nevaberry/nevaberry-plugins/aspnet-core-knowledge-patch)
Your own site
<a href="https://agentmods.dev/skills/nevaberry/nevaberry-plugins/aspnet-core-knowledge-patch"><img src="https://agentmods.dev/badge/skills/nevaberry/nevaberry-plugins/aspnet-core-knowledge-patch.svg" alt="Measured on agentmods" height="20"></a>
Per session 11 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,891 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 $0.00011 $0.01891
Opus 5 $0.00005 $0.00945
Sonnet 5 $0.00002 $0.00378
Haiku 4.5 $0.00001 $0.00189

Measured 3d ago against content hash bb0bc22e374e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

aspnet-core-knowledge-patch 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 3d 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.

plugins/knowledge-patch/patches-claude/aspnet-core-knowledge-patch/SKILL.md · 241 lines

How it starts

The opening of the file, as written. The whole thing — 241 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ASP.NET Core Knowledge Patch

Use this patch when implementing, reviewing, testing, or upgrading ASP.NET Core applications. Check breaking behavior first, then open only the topic references relevant to the task.

Index

Reference Topics
Components, Navigation, and Interop Blazor navigation, reconnection, JavaScript interop, streaming, component state, circuits, and culture
Forms, Validation, and Persistence Recursive validation, form binding, and persistent component state
Hosting, HTTP, Caching, and Security Kestrel, HTTP.sys, memory pools, and development domains
Migrations, Assets, and Tooling Blazor WebAssembly migration, boot assets, fingerprinting, bundlers, and testing
Observability, Identity, and SignalR Exception diagnostics, authentication and Identity metrics, passkeys, and Identity redirects
OpenAPI, Minimal APIs, and JSON OpenAPI 3.1, OpenAPI.NET 2, transformers, XML comments, and JSON converters

Breaking-change checks

Stop depending on blazor.boot.json

The boot configuration is inlined into dotnet.js; there is no separate blazor.boot.json. Workflows that inspect or mutate the old file, including published-integrity and DLL-extension customizations, have no documented direct replacement. Remove assumptions about that artifact before upgrading.

Also remove BlazorCacheBootResources. Fingerprinted browser assets now provide the cache behavior, so the property is unavailable or ineffective.

Audit WebAssembly response-stream consumers

Blazor WebAssembly enables response streaming by default. ReadAsStreamAsync returns BrowserHttpReadStream, which does not support synchronous reads. Code that expects a buffered MemoryStream must become asynchronous or disable streaming per request:

Read the full file on GitHub · 241 lines

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. 3d ago First seen · 241 lines · 11 tokens per session scan A bb0bc22e374e

Subscribe to this mod's changes

aspnet-core-knowledge-patch is a skill published in the GitHub repository Nevaberry/nevaberry-plugins (24 stars, last pushed 7d ago), licensed MIT. It adds 11 tokens to every session and 1,891 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 2026-08-30.

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