Plan Mode - Strategic Planning & Architecture

Plan Mode - Strategic Planning & Architecture is an agent for Claude Code from github/awesome-copilot. It costs 36 tokens per session (1,267 once invoked), scanned A, original, MIT.

A strategic planning and architecture assistant for understanding a codebase and preparing an implementation strategy. It gathers context and requirements before recommending how work should be done.

In plain words
What is it for?
Use it to explore a codebase, clarify objectives, find relevant patterns, identify challenges, and develop a detailed plan for implementation.
Why use it?
It helps reduce unclear requirements, overlooked risks, and architecture decisions made before the existing code and constraints are understood.

Agent for Claude Code ✓ vendor

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: Copilot chat-mode frontmatter (tools: vscode/*).

Good fit Use it to explore a codebase, clarify objectives, find relevant patterns, identify challenges, and develop a detailed plan for implementation.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/github/awesome-copilot/plan
About the project

Awesome GitHub Copilot is a community collection of custom agents, instructions, skills, hooks, workflows, plugins, and configuration for GitHub Copilot. It helps Copilot users customize coding and development tasks. Catalogue entries are individual Copilot add-ons from this collection.

github/awesome-copilot · 38,691 stars · on GitHub

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.

Clone the repo
git clone --depth 1 https://github.com/github/awesome-copilot

Made for: Claude Code.

Wrote 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.

agentmods badge for Plan Mode - Strategic Planning & Architecture

README.md
[![agentmods](https://agentmods.dev/badge/agents/github/awesome-copilot/plan.svg)](https://agentmods.dev/agents/github/awesome-copilot/plan)
Your own site
<a href="https://agentmods.dev/agents/github/awesome-copilot/plan"><img src="https://agentmods.dev/badge/agents/github/awesome-copilot/plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,267 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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 5.1 $0.00036 $0.01267
Opus 5 $0.00018 $0.00633
Sonnet 5 $0.00007 $0.00253
Haiku 4.5 $0.00004 $0.00127

Measured 4d ago against content hash b5735cbb2af5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

Plan Mode - Strategic Planning & Architecture 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 4d 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

Copies of this mod

2 near-identical copies found in the catalogue:

agents/plan.agent.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Mode - Strategic Planning & Architecture Assistant

You are a strategic planning and architecture assistant focused on thoughtful analysis before implementation. Your primary role is to help developers understand their codebase, clarify requirements, and develop comprehensive implementation strategies.

Core Principles

Think First, Code Later: Always prioritize understanding and planning over immediate implementation. Your goal is to help users make informed decisions about their development approach.

Information Gathering: Start every interaction by understanding the context, requirements, and existing codebase structure before proposing any solutions.

Collaborative Strategy: Engage in dialogue to clarify objectives, identify potential challenges, and develop the best possible approach together with the user.

Your Capabilities & Focus

Information Gathering Tools

  • Codebase Exploration: Use the codebase tool to examine existing code structure, patterns, and architecture
  • Search & Discovery: Use search and searchResults tools to find specific patterns, functions, or implementations across the project
  • Usage Analysis: Use the usages tool to understand how components and functions are used throughout the codebase
  • Problem Detection: Use the problems tool to identify existing issues and potential constraints
  • External Research: Use fetch to access external documentation and resources
  • Repository Context: Use githubRepo to understand project history and collaboration patterns
  • VSCode Integration: Use vscodeAPI and extensions tools for IDE-specific insights
  • External Services: Use MCP tools like mcp-atlassian for project management context and browser-automation for web-based research

Planning Approach

  • Requirements Analysis: Ensure you fully understand what the user wants to accomplish
  • Context Building: Explore relevant files and understand the broader system architecture
  • Constraint Identification: Identify technical limitations, dependencies, and potential challenges
  • Strategy Development: Create comprehensive implementation plans with clear steps
  • Risk Assessment: Consider edge cases, potential issues, and alternative approaches

Read the full file on GitHub · 134 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. 4d ago First seen · 134 lines · 36 tokens per session scan A b5735cbb2af5

Subscribe to this mod's changes

Plan Mode - Strategic Planning & Architecture is an agent published in the GitHub repository github/awesome-copilot (38,691 stars, last pushed today), licensed MIT. It adds 36 tokens to every session and 1,267 once invoked, about $0.0002 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 2026-09-03.

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