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.
npx agentmods add instructions/microsoft/agent365-dotnet/copilot-instructionsgit clone --depth 1 https://github.com/microsoft/Agent365-dotnetWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.02196 | $0.02196 |
| Opus 5 | $0.01098 | $0.01098 |
| Sonnet 5 | $0.00439 | $0.00439 |
| Haiku 4.5 | $0.00220 | $0.00220 |
Grade A, and why
Agent365-dotnet 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.
How it starts
The opening of the file, as written. The whole thing — 182 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub Copilot Instructions for Agent365-dotnet
The Microsoft Agent 365 SDK (C#/.NET) extends the Microsoft 365 Agents SDK with enterprise capabilities across four modules: Observability, Notifications, Runtime, and Tooling. Packages publish to NuGet under the Microsoft.Agents.A365.* prefix.
Build, Test, and Lint
All commands run from the repository root unless noted. Requires the .NET 8.0.100 SDK (pinned in src/global.json).
# Build / test the whole solution
dotnet build src/Microsoft.Agents.A365.Sdk.sln
dotnet test src/Microsoft.Agents.A365.Sdk.sln
# Build script (traversal build via src/dirs.proj) — preferred for full runs
./build/build.ps1 # Release build
./build/build.ps1 -Clean -Restore -Test # clean rebuild + tests
./build/build.ps1 -Pack # produce NuGet packages
# Run all tests in ONE project
dotnet test src/Tests/Microsoft.Agents.A365.Runtime.Tests/Microsoft.Agents.A365.Runtime.Tests.csproj
# Run a SINGLE test or test class (xUnit primary; some MSTest)
dotnet test src/Microsoft.Agents.A365.Sdk.sln --filter "FullyQualifiedName~TenantContextHelperTests"
dotnet test src/Microsoft.Agents.A365.Sdk.sln --filter "Name=Extract_Returns_TenantId"
# Format check (enforced as a pre-commit hook)
dotnet format src/Microsoft.Agents.A365.Sdk.sln --verify-no-changes
CI (.github/workflows/ci.yml) builds and tests in Release with --no-restore/--no-build, then packs. Some Observability/Tooling tests read AZURE_OPENAI_ENDPOINT, AZURE_OPENAI_API_KEY, and AZURE_OPENAI_DEPLOYMENT from the environment.
Pre-commit hooks (.pre-commit-config.yaml, install with pip install pre-commit && pre-commit install) run gitleaks (secret scanning), whitespace/EOL fixers, and dotnet format.
Architecture
The SDK follows a consistent Core + Extensions pattern. Each module has a Core/Runtime package with base functionality and per-framework extension packages (SemanticKernel, AgentFramework, AzureAIFoundry, OpenAI). Source lives under src/<Module>/:
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.
- 2d ago First seen · 182 lines · 2,196 tokens per session scan A 59c5955257f3
Agent365-dotnet copilot-instructions.md is an instructions file published in the GitHub repository microsoft/Agent365-dotnet (29 stars, last pushed 1mo ago), licensed MIT. It adds 2,196 tokens to every session, about $0.0110 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.
Other instructions, from other repositories
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
next.js AGENTS.md
Instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.