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CrestApps.AgentSkills copilot-instructions.md

Development instructions for CrestApps.AgentSkills, a .NET 10 collection of shared AI-agent skills and MCP tools for .NET and Orchard Core applications. They describe the source projects, package management, build checks, and required coding style.

In plain words
What is it for?
Use them when building or testing the repository, adding Orchard Core or CrestApps skills, maintaining MCP tooling, or updating .NET package and source files.
Why use it?
They make changes consistent across the skill content, MCP engine, and related packages while requiring build warnings and analyzers to be addressed.

Instructions file for GitHub Copilot

13 4d ago A scan 3,271 tokens original MIT
View the source file CrestApps/CrestApps.AgentSkills
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 instructions/crestapps/crestapps.agentskills/copilot-instructions
Clone the repo
git clone --depth 1 https://github.com/CrestApps/CrestApps.AgentSkills

Made for: GitHub Copilot.

Per session 3,271 This file is loaded in full into every session.
When invoked 3,271 The same file — it is already loaded in full.
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 $0.03271 $0.03271
Opus 5 $0.01636 $0.01636
Sonnet 5 $0.00654 $0.00654
Haiku 4.5 $0.00327 $0.00327

Measured 2d ago against content hash 6416527c0355, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

CrestApps.AgentSkills copilot-instructions.md 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 2d 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.

.github/copilot-instructions.md · 248 lines

How it starts

The opening of the file, as written. The whole thing — 248 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CrestApps.AgentSkills Development Instructions

ALWAYS reference these instructions first and fall back to searching only if needed.

Use ASD-STE100 Simplified Technical English for all responses.

Project Overview

CrestApps.AgentSkills contains shared AI agent skills and MCP tooling for .NET applications and Orchard Core projects.

  • Target Framework: .NET 10 (net10.0)
  • SDK Version: .NET 10.0.100 (see global.json)
  • Package Management: Central Package Management via Directory.Packages.props
  • Skill source roots:
    • src/CrestApps.AgentSkills/orchardcore/ - framework-only Orchard Core skills
    • src/CrestApps.AgentSkills/crestapps-orchardcore/ - CrestApps.OrchardCore module skills
    • src/CrestApps.AgentSkills/crestapps-core/ - direct CrestApps.Core skills

Four Source Projects

  1. CrestApps.AgentSkills - Skill content container

    • Contains canonical skill source roots under orchardcore/, crestapps-orchardcore/, and crestapps-core/
    • Not packable — purely a source container referenced by the other packages and plugin bundles

  2. CrestApps.AgentSkills.Mcp - Generic MCP engine

    • Framework-agnostic skill parser and MCP provider
    • Supports .md (front-matter) and .yaml/.yml skill formats
    • Key interfaces: IAgentSkillFilesStore, IMcpPromptProvider, IMcpResourceProvider
    • Key implementations: DefaultAgentSkillFilesStore, SkillPromptProvider, SkillResourceProvider
    • Key parsers: SkillFrontMatterParser, SkillYamlParser, SkillFileParser
    • No bundled skills — expects consumer to provide skill directory

  3. CrestApps.AgentSkills.OrchardCore - Dev-time skill distributor

    • Development dependency only (IncludeBuildOutput=false, DevelopmentDependency=true)
    • Uses MSBuild .targets to copy both orchardcore/ and crestapps-orchardcore/ to solution root .agents/skills/ on first build
    • No runtime code — purely for local AI authoring

  4. CrestApps.AgentSkills.Mcp.OrchardCore - Runtime MCP server for Orchard Core

    • Extends CrestApps.AgentSkills.Mcp with Orchard Core–specific convenience wrappers
    • Bundles both orchardcore/ and crestapps-orchardcore/, packed under skills/ and copied to the consuming app's build and publish output at .agents/skills/ by a buildTransitive targets file (not contentFiles, which NuGet drops for transitive references)
    • Entry point: OrchardCoreSkillMcpExtensions (AddOrchardCoreSkills, AddOrchardCoreAgentSkillServices)
    • Services registered as singletons for caching

Read the full file on GitHub · 248 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. 2d ago First seen · 248 lines · 3,271 tokens per session scan A 6416527c0355

Subscribe to this mod's changes

CrestApps.AgentSkills copilot-instructions.md is an instructions file published in the GitHub repository CrestApps/CrestApps.AgentSkills (13 stars, last pushed 4d ago), licensed MIT. It adds 3,271 tokens to every session, about $0.0164 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.

Testingagent-skillsaiai-agents-frameworkdotnetmcpmcp-server
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