Borrowing it
Nothing to install: this file belongs to rajbos/ai-engineering-fluency. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/rajbos/ai-engineering-fluency/main/.github/instructions/visualstudio-extension.instructions.mdgit clone --depth 1 https://github.com/rajbos/ai-engineering-fluencyWrote 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.
[](https://agentmods.dev/instructions/rajbos/ai-engineering-fluency/visualstudio-extension)<a href="https://agentmods.dev/instructions/rajbos/ai-engineering-fluency/visualstudio-extension"><img src="https://agentmods.dev/badge/instructions/rajbos/ai-engineering-fluency/visualstudio-extension/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/rajbos/ai-engineering-fluency/visualstudio-extension"><img src="https://agentmods.dev/badge/instructions/rajbos/ai-engineering-fluency/visualstudio-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00817 | $0.00817 |
| Opus 5.5 | $0.00327 | $0.00327 |
| Sonnet 5.5 | $0.00163 | $0.00163 |
| Haiku 4.5 | $0.00082 | $0.00082 |
Grade A, and why
ai-engineering-fluency visualstudio-extension.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 yesterday.
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 — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Visual Studio Extension — Architecture & Development Guide
The visualstudio-extension/ folder contains a C# Visual Studio extension (.vsix) that replicates the core views of the VS Code extension for users of Visual Studio IDE.
Planned Approach (Option C — WebView2 + existing webviews)
The extension hosts a WebView2 control inside a Visual Studio Tool Window (C# AsyncPackage). The existing compiled webview bundles from vscode-extension/dist/webview/ run inside WebView2 — avoiding a full UI rewrite. A thin C# bridge handles file I/O and passes JSON to the webview via PostWebMessageAsJson.
Key design decisions
- Data layer: The
VisualStudioDataAccessclass insrc/visualstudio.tsalready handles all session discovery and parsing for Visual Studio Copilot Chat binary session files (MessagePack format). The C# host reads session metadata and delegates token estimation to this layer by shelling out to the CLI, or by re-implementing only the discovery logic in C#. - UI: WebView2 renders the existing
details,chart,usage, anddiagnosticswebview bundles. The VS Code CSS theme tokens (--vscode-*) will need a compatibility shim mapping to Visual Studio theme tokens. - No cloud storage: Azure Storage integration is out of scope for the initial version.
Developer Workflow
# Prerequisites: Visual Studio 2022, .NET SDK, VSIX workload
cd visualstudio-extension
dotnet build --configuration Release
Or from the repo root:
./build.ps1 -Project visualstudio
Build Validation
VSIX projects require Visual Studio's MSBuild toolchain — not dotnet build.
Correct way: use build.ps1
Always build the VS extension via the root orchestrator:
# From the repo root:
./build.ps1 -Project visualstudio
This uses vswhere.exe to locate the correct MSBuild.exe from the Visual Studio install. Running dotnet build against the .csproj directly always fails with:
error MSB4018: The "GenerateResourceAndCtoFileManifests" task failed unexpectedly.
That error is a dotnet build / VSSDK incompatibility, not a code error — ignore it if seen.
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.
- yesterday First seen · 73 lines · 817 tokens per session scan A de34fc77a06f
ai-engineering-fluency visualstudio-extension.instructions.md is an instructions file published in the GitHub repository rajbos/ai-engineering-fluency (119 stars, last pushed yesterday), licensed MIT. It adds 817 tokens to every session, about $0.0033 per session on Opus 5.5. 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 2026-10-26.
Other instructions, from other repositories
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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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 copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.