[Nitin-Sagar-B]

Summary

Modernizes SparkOllama as a bounded, local-only Ollama client.

• separates Streamlit UI, application service, and provider boundaries
• enforces loopback-only Ollama endpoints and loopback-only Streamlit serving
• disables Streamlit usage reporting
• bounds prompts, complete conversation turns, session state, and responses
• adds safe rendering, typed error translation, partial-stream recovery, locked packaging, and a runnable launcher
• adds accurate privacy, architecture, limitations, troubleshooting, and llms.txt documentation

Validation

• 28 deterministic tests
• Ruff formatting and linting
• strict mypy
• wheel and source distribution builds
• CI package smoke-test matrix for Python 3.11–3.13
• independent review completed; LAN exposure, telemetry, history, packaging, endpoint, and context-boundary findings were remediated

Known limitation

The current Streamlit interface cannot interrupt a blocked in-flight Ollama request. The application relies on the configured client timeout and documents this explicitly rather than claiming full cancellation.

Part of Wave 2 in the Sparkience modernization plan.