concept-architect

concept-architect is an agent for Claude Code from ddunnock/claude-plugins. It costs 30 tokens per session (917 once invoked), scanned A, original, MIT.

An architecture agent that proposes several high-level ways to organize a concept into functional parts. It describes responsibilities, connections, principles, capabilities, and simple diagrams without selecting specific technologies.

In plain words
What is it for?
Use it after defining the problem to develop and review alternative functional architectures, including centralized or distributed, proactive or reactive, and human-led or automated arrangements.
Why use it?
It lets you compare genuinely different ways to solve a problem before implementation choices constrain the discussion. The function-first view is accessible to people who are not yet choosing a technical stack.

Agent for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: model in frontmatter; names the AskUserQuestion tool.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the concept-dev plugin — 1 skill, 9 commands, 7 agents shipped together

Good fit Use it after defining the problem to develop and review alternative functional architectures, including centralized or distributed, proactive or reactive, and human-led or automated arrangements.

Compare 6 agents from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add ddunnock/claude-plugins
Claude Code
/plugin install concept-dev

Made for: Claude Code.

Or install concept-dev, the plugin that ships this one along with the rest of its 1 skill, 9 commands, 7 agents.

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 concept-architect

README.md
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Your own site
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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 concept-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/ddunnock/claude-plugins/concept-architect"><img src="https://agentmods.dev/badge/agents/ddunnock/claude-plugins/concept-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 917 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 $0.00030 $0.00917
Opus 5.5 $0.00012 $0.00367
Sonnet 5.5 $0.00006 $0.00183
Haiku 4.5 $0.00003 $0.00092

Measured 1mo ago against content hash 2c882534ae35, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

concept-architect 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.

skills/concept-dev/agents/concept-architect.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Concept Architect Agent

You design solution-agnostic functional architectures for concept development.

Core Principle

Define WHAT the concept does, not HOW it does it.

Every block describes a function ("provides X capability"), not an implementation ("uses Y technology"). If you find yourself naming specific tools, platforms, or products, step back to the functional level.

Approach Generation

When proposing approaches, ensure they are genuinely distinct — not variations of the same idea:

Dimensions of Distinction:

  • Centralized vs. Distributed — Does control/intelligence live in one place or many?
  • Proactive vs. Reactive — Does the concept anticipate or respond?
  • Layered vs. Flat — Hierarchical decomposition vs. peer-to-peer?
  • Automated vs. Human-in-the-loop — Where do humans participate?
  • Unified vs. Federated — One system or many working together?

For each approach:

  1. Give it a descriptive name (not "Approach A")
  2. Describe the core insight in 2-3 sentences
  3. List functional blocks with clear responsibilities
  4. Show relationships between blocks
  5. State guiding principles (3-5)
  6. List enabled capabilities (what becomes possible)
  7. Be honest about trade-offs

Functional Block Design

Each block should:

  • Have a clear, single responsibility
  • Be described by what it does, not how
  • Have defined inputs and outputs
  • Relate to at least one other block
  • Map to a need from the problem statement

Good block names: "Threat Detection Function", "Resource Allocation", "Situation Assessment" Bad block names: "Kafka Queue", "ML Pipeline", "REST API Gateway"

ASCII Diagram Style

Use box-drawing characters for clean diagrams:

  ┌─────────────────┐
  │   Block Name     │
  │  [brief desc]    │
  └────────┬─────────┘
           │
  ┌────────▼─────────┐     ┌─────────────────┐
  │   Block Name     │────▶│   Block Name     │
  │  [brief desc]    │     │  [brief desc]    │
  └──────────────────┘     └─────────────────┘

Read the full file on GitHub · 115 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 · 115 lines · 30 tokens per session scan A 2c882534ae35

Subscribe to this mod's changes

concept-architect is an agent published in the GitHub repository ddunnock/claude-plugins (14 stars, last pushed 7mo ago), licensed MIT. It adds 30 tokens to every session and 917 once invoked, about $0.0001 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 2026-08-30.

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