v0.1.0

Initial release of Sage, an offline-first academic assistant using Retrieval-Augmented Generation (RAG) with multi-agent orchestration via LangGraph.

Added

• Multi-Agent Orchestration: LangGraph-based workflow router executing 7 specialized agent flows (Explain, Quiz Me, Diagram, Study Plan, Research, Fix Code, and Thinking) using a hierarchical model strategy (primary 2B/4B + utility 0.8B models).
• Hybrid RAG Pipeline: Local document ingestion and search combining dense vector retrieval (ChromaDB + ONNX BGE-small embeddings) and sparse keyword retrieval (BM25) fused via Reciprocal Rank Fusion (RRF).
• Desktop Shell Integration: Wrapped python backend using pywebview with a custom C-based launcher, system tray control via pystray, and offline fallback check.
• Interactive Diagram Rendering: Client-side rendering of generated diagrams using Mermaid with robust server-side syntax validation and sanitization.
• Long-term Semantic Memory: Automated memory extraction and history compression to persist learning facts across chat sessions.
• Typst-Powered Exports: Report exports in PDF and Markdown format, with patched checkpointer-based retrieval for persistent download access.
• Sandboxed Code Execution: Safe local code execution environment pre-configured with scientific libraries (NumPy, Pandas, SciPy, SymPy, Matplotlib, Scikit-learn).
• Academic Search Engines: Integrated arXiv API, Wikipedia search, and DuckDuckGo search APIs.
• Windows Installer (NSIS): Complete Windows packaging scripts (build.ps1) with auto-configuration and model checksum verification.
• Staging Hub & Frontend UI: Responsive React/TypeScript SPA with dynamic loading, landing page flow, staging hub, and prompt length limits.
• Comprehensive CI/CD Pipeline: GitHub Actions workflows for linting, security scans, unit tests, release installers, R2 bucket storage uploads, and GitHub Pages deployments.
• Developer Documentation: Complete guides for Architecture, Environment Setup, API Contracts, Deployment, and Departmental customizability.

Changed

• Unified Release CDN: Standardized CI/CD builds (main and dev-main branches) to upload release artifacts to a single, persistent Cloudflare R2 directory (vdev-ci) to resolve download path fragmentation.
• Embeddings & Fonts: Standardized font-embedding configuration for consistent local PDF exports.
• Performance & Structure: Deduplicated LLM parameters in llm.py, removed redundant retrieval modules for Code Fix and Diagram modes to speed up generation, and solved Ruff/Mypy linting errors across all modules.

Fixed

• Mermaid Syntax Errors: Sanitized Mermaid generation output to eliminate class suffix syntax errors and label formatting issues.
• Course List Ingestion: Patched /api/courses endpoint to dynamically read and populate the UI from courses.json.
• UI Overflow: Capped maximum prompt input length in the chat panel to prevent visual breaks.
• Download Persistence: Solved retrieval bugs in SQLite memory checkpointing to ensure research download list persists across user sessions.
• Unit Tests: Repaired failing agent core tests (test_agents_core.py and test_agents_response.py) and reached 85%+ test coverage.

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