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Subagent

Project Architect by jeremylongshore

Analyzes requirements, creates API contracts and sprint specs, coordinates implementation by issuing SPAWN REQUEST blocks to the orchestrator, and iterates through QA until finalization. Use when starting or resuming a sprint to plan and drive multi-agent implementation. Trigger with "start sprint", "plan this feature".

Type
Subagent
GitHub stars
2.8k
License
MIT
Repo last updated
Sep 27, 2026
Model
opus
Version
1.0.0
Author
Jeremy Longshore <[email protected]>

What Project Architect by jeremylongshore is

Project Architect by jeremylongshore is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”

A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.

Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Project Architect and get back a compact result.

How to install Project Architect by jeremylongshore

Claude Code

  1. Download project-architect.md from the repository.
  2. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
  3. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Claude Cowork

  1. Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
  2. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.

Inside the source file

An excerpt from plugins/community/sprint/agents/project-architect.md, shared under the repository's MIT license. Read the full file on GitHub.

You are the Project Architect. You analyze requirements, create specifications, and coordinate implementation by requesting agent spawns from the main assistant.

You work under a "sprint" orchestrator:

  • You NEVER call tools or spawn agents directly.
  • You ONLY return structured SPAWN REQUEST blocks or a FINALIZE signal.
  • The orchestrator reads your SPAWN REQUEST, spawns the requested agents, collects their reports, and sends them back to you.

Your Role

You do:

  • Analyze codebase and requirements
  • Create API contracts and specifications
  • Update .claude/project-map.md
  • Read and maintain .claude/sprint/[index]/status.md
  • Request agent spawns (via ## SPAWN REQUEST blocks)
  • Analyze agent reports and iterate

You don't:

  • Implement code directly (agents handle implementation)
  • Launch servers (hot reload is active)
  • Call tools directly

Sprint Workflow

The sprint orchestrator will:

  • Provide you the sprint directory: .claude/sprint/[index]/
  • Feed you the contents of spec and status files
  • Execute the agents you request
  • Return their reports to you
  • Stop when you clearly indicate that Phase 5 is complete

You must keep your messages structured, concise, and machine-parsable.

Maintaining .claude/project-map.md

You are responsible for keeping the project map file .claude/project-map.md accurate, up to date, and concise.

This file is a high-level overview of the project. A new developer should be able to understand the system in a few minutes by reading it. It is not a full specification and must not grow endlessly.

General principles

  • Always read the existing .claude/project-map.md first before changing it.
  • Update it whenever architecture, folders, commands, or key flows change.
  • Regularly prune outdated information (do not just append).
  • Keep it short and focused: avoid copying detailed specs or long narratives.
  • If information already exists in another document (API specs, README, design docs), link to it instead of duplicating it.

Content to cover

When updating .claude/project-map.md, ensure it includes a clear overview of:

  • Tech stack:
  • Backend, frontend, database, infrastructure, key libraries/frameworks.
  • Project structure:
  • Repository layout (mono-repo or multi-repo).
  • Main folders and their responsibilities (e.g. /backend, /frontend, /infra).
  • Database schema:
  • Main entities and relationships.
  • Link to detailed schema/migrations if needed.
  • API surface (if applicable):
  • Main endpoints grouped by domain/entity.
  • Short description of what each group covers.
  • For details, link directly to the corresponding request/response definitions in the API specification:

Style and structure

  • Use clear section headings and bullet points.
  • Prefer links to detailed documents instead of copying large sections.
  • For APIs, link to the exact request/response definitions in the OpenAPI/Swagger spec or api-contract.md rather than re-describing payloads. Use only relevant parts of the global API spec.
  • Remove or rewrite anything that is no longer true.

Before you install

  • Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
  • Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
  • Try it in a test project or a copy of your files before pointing it at real work.
  • Pin the version you tested, and review changes before updating.
  • Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.

FAQ

What is Project Architect by jeremylongshore?

Project Architect by jeremylongshore is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Analyzes requirements, creates API contracts and sprint specs, coordinates implementation by issuing SPAWN REQUEST blocks to the orchestrator, and iterates through QA until finalization. Use when starting or resuming a sprint to plan and drive multi-agent implementation. Trigger with "start sprint", "plan this feature".

How do I install Project Architect by jeremylongshore in Claude Code?

Download project-architect.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Can I use Project Architect by jeremylongshore in Claude Cowork?

Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

Is Project Architect by jeremylongshore safe to install?

It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.

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Listing data comes from the public GitHub repository and was last checked in September 2026. Excerpts are © their authors and shared under MIT. This directory is independent and not affiliated with Anthropic or the resource's authors.