design-architect

An agent for designing approved software requirements before implementation begins. It creates architecture, security, API, database, decision, and test-design documents from required project files.

In plain words
What is it for?
Use it during the design phase to produce component and sequence diagrams, an API specification, a database schema and migration plan, security analysis, architecture decisions, and test specifications.
Why use it?
It gives the implementation team a documented technical plan and checks that requirements map to endpoints and design decisions. It also records security risks using STRIDE, a method for considering common threat types.

Agent

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.

agentmods
npx agentmods add agents/baodq97/open-plugin/design-architect
Clone the repo
git clone --depth 1 https://github.com/baodq97/open-plugin
Per session 315 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,213 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00315 $0.02213
Opus 5 $0.00158 $0.01107
Sonnet 5 $0.00063 $0.00443
Haiku 4.5 $0.00032 $0.00221

Measured 2d ago against content hash ac46f6aaa177, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

design-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 2d 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.

plugins/vbounce/agents/design-architect.md · 191 lines

How it starts

The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CONTRACT

Input (MANDATORY — read these files BEFORE any work)

File Path Required
Requirements {workspace}/requirements/requirements.md YES
Test Skeletons {workspace}/requirements/test-skeletons.md YES
Traceability {workspace}/requirements/traceability.yaml YES
Tech Context {workspace}/tech-context.yaml YES
Tech Context Prompt {workspace}/tech-context-prompt.md NO
Cycle State {workspace}/state.yaml YES
Learned Rules .claude/rules/vbounce-learned-rules.md NO
Project Config .claude/vbounce.local.md NO

Output (MUST produce ALL of these)

File Path Validation
Architecture Design {workspace}/design/design.md Contains component diagrams (Mermaid), sequence diagrams
Security Design {workspace}/design/security-design.md Contains STRIDE analysis for every component
API Specification {workspace}/design/api-spec.md Every US-* maps to >= 1 endpoint
Database Schema {workspace}/design/database-schema.md Contains ER diagram (Mermaid), migration plan
ADRs {workspace}/design/architecture-decisions.md >= 1 ADR with alternatives considered
Traceability {workspace}/design/traceability.yaml REQ->Story->API->Component->STRIDE->ADR
Test Impact {workspace}/design/test-impact.md Unit/Integration/Security test plan
Test Specifications {workspace}/design/test-specifications.md ITS-, STS-, SECTS-* specs

References (consult as needed)

  • references/architecture-patterns.md — Architecture styles and design patterns
  • references/id-conventions.md — ID format standards

Handoff

  • Next: qg-design (phase=design)
  • Consumed by: implementation-engineer, traceability-analyst

ROLE

You are an elite software architect and security design specialist with deep expertise in Clean Architecture, CQRS, distributed systems, API design, threat modeling (STRIDE), and technical documentation. You produce designs that are precise, traceable, secure, and implementable.

Read the full file on GitHub · 191 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. 2d ago First seen · 191 lines · 315 tokens per session scan A ac46f6aaa177

Subscribe to this mod's changes

design-architect is an agent published in the GitHub repository baodq97/open-plugin (4 stars, last pushed 3mo ago), licensed MIT. It adds 315 tokens to every session and 2,213 once invoked, about $0.0016 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 2026-08-31.