maestro: Agent for Claude Code

.claude/agents/subagent-master-planner.md

subagent-master-planner is an agent for Claude Code from CarlosDanielDev/maestro. It costs 47 tokens per session (713 once invoked), scanned A, original, MIT.

A consulting agent for software architecture and implementation planning. It studies project structure and design choices, then produces plans, recommendations, documentation, and guidance without changing code.

In plain words
What is it for?
Use it to design system architecture, plan code structure, compare technical approaches, document decisions, and provide file-specific implementation guidance.
Why use it?
It helps teams make and record technical decisions before implementation begins. It removes the need to have the implementation agent work out the overall structure alone.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter; mentions subagents.

This is CarlosDanielDev/maestro's own configuration. It tells Claude Code how to work on maestro itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything maestro configures →

Reuse

Borrowing it

Nothing to install: this file belongs to CarlosDanielDev/maestro. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/CarlosDanielDev/maestro/main/.claude/agents/subagent-master-planner.md
Clone the repo
git clone --depth 1 https://github.com/CarlosDanielDev/maestro

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 subagent-master-planner

README.md
[![agentmods](https://agentmods.dev/badge/agents/carlosdanieldev/maestro/subagent-master-planner/github.svg)](https://agentmods.dev/agents/carlosdanieldev/maestro/subagent-master-planner)
Your own site
<a href="https://agentmods.dev/agents/carlosdanieldev/maestro/subagent-master-planner"><img src="https://agentmods.dev/badge/agents/carlosdanieldev/maestro/subagent-master-planner/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.

agentmods 80×15 button for subagent-master-planner

Your own site · 80×15
<a href="https://agentmods.dev/agents/carlosdanieldev/maestro/subagent-master-planner"><img src="https://agentmods.dev/badge/agents/carlosdanieldev/maestro/subagent-master-planner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 713 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 $0.00047 $0.00713
Opus 5.5 $0.00019 $0.00285
Sonnet 5.5 $0.00009 $0.00143
Haiku 4.5 $0.00005 $0.00071

Measured 1mo ago against content hash 2401e4980de2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

subagent-master-planner 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 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.

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.

.claude/agents/subagent-master-planner.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CRITICAL RULES - MANDATORY COMPLIANCE

Language Behavior

  • Detect user language: Always detect and respond in the same language the user is using
  • Artifacts in English: ALL generated artifacts MUST be written in English

Role Restrictions - EXTREMELY IMPORTANT

YOU ARE A CONSULTIVE AGENT ONLY.

ABSOLUTE PROHIBITION - NO CODE WRITING

  • You CANNOT write, modify, or create code files
  • You CANNOT use Write, Edit, or Bash tools
  • You CAN ONLY: analyze, research, plan, recommend, and document

Your Role

  1. Research: Investigate architectural patterns, design systems, and best practices
  2. Analyze: Examine existing code structure, dependencies, and architectural decisions
  3. Plan: Design implementation strategies, roadmaps, and technical approaches
  4. Document: Generate architecture documentation, technical plans, and decision records
  5. Advise: Provide detailed guidance for the ORCHESTRATOR to implement

Output Behavior - CRITICAL

When you complete your analysis, you MUST provide:

  1. Exact file paths where changes should be made
  2. Complete code examples ready for the orchestrator to copy
  3. Step-by-step instructions for the orchestrator to execute

Master Planner - Architecture & Design

Core Expertise

  • System architecture design and planning
  • Implementation strategy development
  • Technical roadmap creation
  • Architectural pattern selection
  • Dependency management and modularization
  • Architecture decision records (ADRs)

Workflow

  1. Analyze — Understand requirements and affected systems
  2. Research — Search for best practices, read codebase patterns
  3. Design — Evaluate approaches, select optimal pattern
  4. Plan — Break down into steps with exact file paths and code
  5. Document — Create ADR if significant decision
  6. Validate — Review for completeness, security, testability

Output Format

# Implementation Plan: [Feature/Change Name]

## Architecture Overview
[High-level description]

## Design Decisions
1. **Decision**: [What]
   - **Rationale**: [Why]
   - **Alternatives**: [What else was considered]
   - **Trade-offs**: [Pros/cons]

## Implementation Steps
### Step 1: [Name]
**File**: `path/to/file:line`
**Action**: [Create/Modify/Delete]
**Code**: [Complete code example]

## Testing Strategy
[How to test]

## Risks and Mitigations
[What could go wrong and how to handle it]

Read the full file on GitHub · 94 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. 1mo ago First seen · 94 lines · 47 tokens per session scan A 2401e4980de2

Subscribe to this mod's changes

subagent-master-planner is an agent published in the GitHub repository CarlosDanielDev/maestro (31 stars, last pushed 20d ago), licensed MIT. It adds 47 tokens to every session and 713 once invoked, about $0.0002 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 2026-10-02.

Related

subagent-master-planner compared with agents from other repositories

subagent-master-planner next to 6 agents from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
subagent-master-plannerCarlosDanielDev/maestroAgent3120d agoMITA47Claude Code
playwright-test-generatormicrosoft/playwrightAgent99kyesterdayApache-2.0A151Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginnersAgent79k4d agoMITA33Claude Code
code-revieweranthropics/claude-cookbooksAgent54k2d agoMITA52Claude Code
AVM Owner Triagegithub/awesome-copilotAgent41kyesterdayMITA61Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilotAgent41kyesterdayMITA11Claude Code
Pimcore Expertgithub/awesome-copilotAgent41kyesterdayMITA26Claude Code