Visual Studio Code is a code editor that supports editing, navigating, understanding, debugging, and extending software projects. Developers use it for the edit-build-debug cycle, and the catalogue add-ons provide skills, instructions, and agents for working within the editor.
Borrowing it
Nothing to install: this file belongs to microsoft/vscode. 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/microsoft/vscode/main/.github/skills/vscode-dev-workbench/SKILL.mdgit clone --depth 1 https://github.com/microsoft/vscodeWrote 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/skills/microsoft/vscode/vscode-dev-workbench)<a href="https://agentmods.dev/skills/microsoft/vscode/vscode-dev-workbench"><img src="https://agentmods.dev/badge/skills/microsoft/vscode/vscode-dev-workbench/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/skills/microsoft/vscode/vscode-dev-workbench"><img src="https://agentmods.dev/badge/skills/microsoft/vscode/vscode-dev-workbench.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00078 | $0.02020 |
| Opus 5.5 | $0.00031 | $0.00808 |
| Sonnet 5.5 | $0.00016 | $0.00404 |
| Haiku 4.5 | $0.00008 | $0.00202 |
Grade A, and why
vscode-dev-workbench scanned grade A with 1 finding 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
On first start you may see one crash like `Cannot find module './indexes'` — it's the watcher racing the first build. nodemon restarts automatically once `out/` finishes compiling. The server is ready when `curl -sk -o / How it starts
The opening of the file, as written. The whole thing — 138 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Running vscode.dev Against Local VS Code Sources
The vscode-dev repo is the vscode.dev server. When run locally with ?vscode-quality=dev, it serves the VS Code web workbench (or Agents window at /agents) from the sibling microsoft/vscode checkout. This is the fastest way to validate web-only changes to the workbench without shipping an Insiders build.
Layout assumption
vscode-dev and vscode must be sibling folders:
<workRoot>/
vscode/ # microsoft/vscode checkout
vscode-dev/ # microsoft/vscode-dev checkout
If your paths differ, check server/ in vscode-dev for the source root resolution — the /vscode-sources/* route maps to ../vscode.
Start the dev server
Critical: Run npm run dev from the vscode-dev folder, NOT from vscode. The vscode repo has no dev script and will fail with npm error Missing script: "dev". Terminal tools that simplify/strip leading cd into separate commands will silently keep the cwd of a previous terminal — always use an absolute pushd or verify with pwd before npm run dev.
cd /path/to/vscode-dev # NOT /path/to/vscode
npm run dev # runs watch + nodemon; serves https://127.0.0.1:3000
If you're driving this through an agent/terminal tool, prefer:
pushd /absolute/path/to/vscode-dev >/dev/null && pwd && npm run dev
On first start you may see one crash like Cannot find module './indexes' — it's the watcher racing the first build. nodemon restarts automatically once out/ finishes compiling. The server is ready when curl -sk -o /dev/null -w "%{http_code}" https://127.0.0.1:3000/ returns 200.
URLs
https://127.0.0.1:3000/?vscode-quality=dev— main workbench, local dev sourceshttps://127.0.0.1:3000/agents?vscode-quality=dev— Agents window, local dev sourceshttps://127.0.0.1:3000/?vscode-version=<commit>— pinned production commit- Add
&vscode-log=tracefor verbose client logging
Interacting via the integrated browser
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.
- 1mo ago First seen · 138 lines · 78 tokens per session scan A a0b88b082b2a
vscode-dev-workbench is a skill published in the GitHub repository microsoft/vscode (194,219 stars, last pushed today), licensed MIT. It adds 78 tokens to every session and 2,020 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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