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 agents/microsoft/typeagent/agent-patternsgit clone --depth 1 https://github.com/microsoft/TypeAgentWhat 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 | $0.00000 | $0.02700 |
| Opus 5 | $0.00000 | $0.01350 |
| Sonnet 5 | $0.00000 | $0.00540 |
| Haiku 4.5 | $0.00000 | $0.00270 |
Grade A, and why
agent-patterns 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 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
Invokes platform APIs directly via `child_process.exec` / `spawn`, device How it starts
The opening of the file, as written. The whole thing — 356 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Patterns — Architecture & Design
Scope: This document describes the nine architectural patterns used by TypeAgent application agents. Use it when designing a new agent or choosing a scaffolding template. For the dispatcher that hosts agents, see
dispatcher.md. For how to automate agent creation, see the onboarding agent atpackages/agents/onboarding/.
Overview
Every TypeAgent agent exports an instantiate(): AppAgent function and
implements the AppAgent interface from @typeagent/agent-sdk. Beyond that
common contract, agents fall into nine patterns based on how they communicate
with external systems, whether they manage persistent state, and what kind of
output they produce.
| Pattern | When to use | Examples |
|---|---|---|
schema-grammar |
Bounded set of typed actions (default) | weather, photo, list |
external-api |
Authenticated REST / cloud API | calendar, email, player |
llm-streaming |
Agent calls an LLM, streams results | chat, greeting |
sub-agent-orchestrator |
API surface too large for one schema | desktop, code, browser |
websocket-bridge |
Automate a host app via a plugin | browser, code |
state-machine |
Multi-phase workflow with approval gates | onboarding, powershell |
native-platform |
OS / device APIs, no cloud | playerLocal, desktop |
view-ui |
Rich interactive web-view UI | turtle, montage, markdown |
command-handler |
Simple settings-style direct dispatch | settings, test |
Pattern details
1. schema-grammar — Standard (default)
The canonical TypeAgent pattern. Define TypeScript action types, generate a
.agr grammar file for natural language matching, and implement a typed
dispatch handler.
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 · 356 lines · 0 tokens per session scan A cc20ddddc931
agent-patterns is an agent published in the GitHub repository microsoft/TypeAgent (738 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,700 tokens. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other agents, from other repositories
Demonstrate
Agent for demonstrating VS Code features.
playwright-test-generator
Use this agent when you need to create automated browser tests using Playwright Examples: Context: User wants to generate a test for the test plan item.
.NET-Notebook-Migration-Agent
Expert .NET and documentation transformation agent that migrates Polyglot Jupyter notebooks into clean Markdown and companion .NET sample code.
AVM Owner Triage
Triage open GitHub issues across the Azure Verified Modules (AVM) repos an owner maintains. Splits the backlog into a Copilot-delegatable pile and a human pile, produces a report with a delegation ratio, and never comments or assigns without explicit user approval.
Ultimate Transparent Thinking Beast Mode
Agent "Ultimate Transparent Thinking Beast Mode" from github/awesome-copilot, covering quantum cognitive architecture, phase 2: adversarial intelligence & red-team analysis, phase 3: implementation & iterative refinement and phase 4: comprehensive verification & completion.
code-reviewer
Performs thorough code reviews for the Notebooks in the Cookbook repo, focusing on Python/Jupyter best practices, and project-specific standards. Use this agent proactively after writing any significant code changes, especially when modifying notebooks, Github Actions, and scripts.