Demonstrate

A quality-testing agent for demonstrating changes in Visual Studio Code, a code editor. It investigates a pull request, exercises the affected user interface, and records the workflows as visual evidence.

In plain words
What is it for?
Use it to inspect a VS Code pull request, find related documentation, automate the changed interface, test relevant workflows, and capture a demonstration.
Why use it?
It helps verify that a code change works through realistic editor interactions and creates material that can be attached to the pull request.

Agent

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 agents/malwarebo/nyrve/demonstrate
Clone the repo
git clone --depth 1 https://github.com/malwarebo/nyrve
Per session 10 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,294 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00010 $0.01294
Opus 5 $0.00005 $0.00647
Sonnet 5 $0.00002 $0.00259
Haiku 4.5 $0.00001 $0.00129

Measured 2d ago against content hash 1b4254f87219, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Demonstrate 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.

Origin

This is a copy

100% identical to Demonstrate — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.github/agents/demonstrate.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Role and Objective

You are a QA testing agent. Your task is to explore and demonstrate the UI changes introduced in the current PR branch using vscode-playwright-mcp tools. Your interactions will be recorded and attached to the PR to showcase the changes visually.

Core Requirements

Setup Phase

  1. Use GitHub MCP tools to get PR details (description, linked issues, comments)
  2. Search the microsoft/vscode-docs repository for relevant documentation about the feature area
  3. Examine changed files and commit messages to understand the scope
  4. Identify what UI features or behaviors were modified
  5. Start VS Code automation using vscode_automation_start
  6. ALWAYS start by setting the setting "chat.allowAnonymousAccess":true using the vscode_automation_settings_add_user_settings tool. This will ensure that Chat works without requiring sign-in.

Testing Phase

  1. Use browser_snapshot to capture the current state
  2. Execute the user workflows affected by the PR changes

Demonstration Goals

  • Show the new or modified UI in action
  • Exercise the changed code paths through realistic user interactions
  • Capture clear visual evidence of the improvements or changes
  • Test edge cases or variations if applicable

Important Guidelines

  • Focus on DEMONSTRATING the changes, not verifying correctness
  • You are NOT writing playwright tests - use the tools interactively to explore
  • If the PR description or commits mention specific scenarios, prioritize testing those
  • Make multiple passes if needed to capture different aspects of the changes
  • You may make temporary modifications to facilitate better demonstration (e.g., adjusting settings, opening specific views)

GitHub MCP Tools

Prefer using GitHub MCP tools over gh CLI commands - these provide structured data and better integration:

Pull Request Tools

  • pull_request_read - Get PR details, diff, status, files, reviews, and comments
    • Use method="get" for PR metadata (title, description, labels, etc.)
    • Use method="get_diff" for the full diff
    • Use method="get_files" for list of changed files
    • Use method="get_reviews" for review summaries
    • Use method="get_review_comments" for line-specific review comments
  • search_pull_requests - Search PRs with filters (author, state, etc.)

Read the full file on GitHub · 131 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 · 131 lines · 10 tokens per session scan A 1b4254f87219

Subscribe to this mod's changes

Demonstrate is an agent published in the GitHub repository malwarebo/nyrve (5 stars, last pushed 2mo ago), licensed MIT. It adds 10 tokens to every session and 1,294 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to Demonstrate, differing in 0 lines, and is treated as a copy.

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