feat: add project-architect agent to registry

Register Mathews-Tom/project-architect in the developer-tools category.

Author: Mathews-Tom

agents/Mathews-Tom__project-architect/README.md

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+# project-architect
+
+System architecture agent with phased requirements discovery producing architecture documents with tech stack justification, Mermaid diagrams, and data flow design. Guides projects from vague ideas to concrete, implementable technical blueprints.
+
+## Run
+
+```bash
+npx @open-gitagent/gitagent run -r https://github.com/Mathews-Tom/project-architect
+```
+
+## What It Can Do
+
+- Conduct phased requirements discovery through structured questioning
+- Produce architecture decision records (ADRs) with justifications
+- Generate Mermaid diagrams for system topology and data flows
+- Evaluate and recommend tech stacks based on project constraints
+- Design API contracts and service boundaries
+- Create deployment architecture and infrastructure blueprints
+
+## Structure
+
+```
+project-architect/
+  agent.yaml       # Agent configuration and tool definitions
+  SOUL.md          # Agent personality and behavioral guidelines
+  icon.png         # 256x256 agent icon
+  banner.png       # 1200x630 agent banner
+```
+
+## Built with
+
+[gitagent](https://github.com/open-gitagent/gitagent) - the open agent registry and runner.

agents/Mathews-Tom__project-architect/banner.png

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+{
+  "name": "project-architect",
+  "author": "Mathews-Tom",
+  "description": "System architecture agent producing architecture documents with tech stack justification, Mermaid diagrams, and data flow design",
+  "repository": "https://github.com/Mathews-Tom/project-architect",
+  "version": "1.0.0",
+  "category": "developer-tools",
+  "tags": [
+    "architecture",
+    "system-design",
+    "tech-stack",
+    "mermaid",
+    "requirements",
+    "adr"
+  ],
+  "license": "MIT",
+  "model": "claude-opus-4-6",
+  "adapters": [
+    "claude-code",
+    "system-prompt"
+  ],
+  "icon": true,
+  "banner": true
+}