SoftJL turns a system description into the UML diagrams, test cases, and Word specifications a software project is supposed to produce, and keeps every artifact traceable back to the requirement it came from. Describe your system in chat and confirm the extracted requirement rules, then work through feasibility analysis with system context, business and system flows, and implementation options weighed by cost, benefit, and risk. From the confirmed rules it builds requirement and design models: functional structure, use cases, domain concepts, architecture, design classes, database and deployment diagrams, all editable as PlantUML with SVG export. Tests follow the same thread, with normal, exceptional, and boundary cases mapped to requirement rules in coverage and traceability matrices that show exactly which requirements lack design or test support before you submit. When a requirement changes, dependencies and update status point at the models, tests, and documents that need review, instead of leaving you to rediscover them by hand. Specifications generate from the saved models as versioned, editable DOCX files, a feasibility report, a requirements specification, and a design description, ready to compare against the diagrams and revise. An optional read-only MCP endpoint lets a coding agent read your designs and acceptance criteria, and the whole workspace runs on your own OpenAI-compatible model service. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache-2.0 licensed.