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Changelog

All notable changes to this project will be documented here.

This project follows Semantic Versioning. Format: ## [version] - YYYY-MM.

[3.0.0] - 2026-05

Added — Hackathons & Recent Topics (Major Expansion)

  • 10_Hackathons/README.md — Hub landing page with 3-theme overview, decision matrix, stack of record (MongoDB Atlas + AWS)
  • 10_Hackathons/templates/ — Canonical idea template, 90-second demo script template, judging rubric
  • 10_Hackathons/theme_1_prolonged_coordination/ — README + 33 research-grounded hackathon ideas (#1–#33)
  • 10_Hackathons/theme_2_multi_agent_collaboration/ — README + 44 ideas (#34–#77) including full A2A protocol coverage
  • 10_Hackathons/theme_3_adaptive_retrieval/ — README + 23 ideas (#78–#100) anchored on ColPali, Search-R1, GraphRAG, HippoRAG
  • 10_Hackathons/deep_dive_ideas/ — 10 full implementation blueprints (Viral Autopsy, Replicant, Portfall, Tipping Oracle, TruthWeight, ChronoLaw, Ghostwriter Forensics, Exodus Mapper, Protocol Darwin, Carbon Lie Detector)
  • 10_Hackathons/deep_dive_ideas/starter_code/ — 4 runnable Python skeletons (ReasoningBank, A2A handshake, ColPali indexing, GraphRAG + HippoRAG PPR)
  • 11_Recent_Topics/README.md — Anchor papers index and usage guide
  • 11_Recent_Topics/2025_2026_trends.md — 25-row trend tracker with maturity ratings and per-role learning guide
  • 11_Recent_Topics/stack_watch.md — MongoDB Atlas, AWS, LLM landscape, retrieval stack, agent frameworks, LLMOps, fine-tuning tooling
  • 11_Recent_Topics/paper_digests/ — 12 paper digests: ReasoningBank, MIRIX, Zep, SagaLLM, VIGIL, Magentic-One, A2A Protocol, MCP, ColPali, Search-R1, GraphRAG, HippoRAG

Changed

  • README.md — What's New (May 2026) section reflects new 10_Hackathons and 11_Recent_Topics additions
  • README.md — Paper Digests link updated to point to 11_Recent_Topics/paper_digests/

[2.0.0] - 2026-03

Added

  • 05_Hands_On_Labs/challenges/ — Community Challenges section with 3 inaugural challenges (Titanic, RAG from scratch, FastAPI + Docker)
  • PROGRESS.md — Personal progress tracker template for forks
  • CHANGELOG.md — This file
  • Forks and GitHub Actions badge in main README
  • Footer navigation links in README (CHANGELOG, PROGRESS, CONTRIBUTING, LICENSE)
  • New advanced notebooks: finetuning_alignment, multi_agent, safety_guardrails, advanced_retrieval under 03_AI_Engineer/advanced/
  • Interview prep notebooks for ML Engineer and AI Engineer tracks (06_Interview_Prep/ml_engineer/, 06_Interview_Prep/ai_engineer/)
  • Statistics foundation notebooks (04_Foundations/statistics/)

Changed

  • README badges now point to the correct repo viraj97-sl/ai-ml-ds-learning-hub
  • Clone URL in 05_Hands_On_Labs/README.md updated to correct repo name
  • Broken challenges/ link in Hands-On Labs converted to a proper challenges directory

Fixed

  • All yourusername and ai-ml-ds-hub placeholders replaced with viraj97-sl and ai-ml-ds-learning-hub

[1.1.0] - 2026-02

Added

  • 03_AI_Engineer/advanced/ track with 4 new notebooks:
    • finetuning_alignment.ipynb — RLHF, DPO, Constitutional AI
    • multi_agent.ipynb — LangGraph multi-agent orchestration
    • safety_guardrails.ipynb — LLM safety, red-teaming, guardrails
    • advanced_retrieval.ipynb — HyDE, re-ranking, multi-hop RAG
  • 04_Foundations/statistics/ — 5 statistics notebooks (descriptive, probability, hypothesis testing, regression, experimental design)
  • 04_Foundations/programming/sql_basics.md — SQL reference guide

Changed

  • Expanded 07_Resources/ with datasets.md listing 50+ practice datasets
  • Updated salary data in 00_Overview/salary_guide.md to 2026 figures

[1.0.0] - 2025-03

Added

  • Initial release of the AI/ML/DS Learning Hub
  • Three full career tracks: Data Scientist, ML Engineer, AI Engineer
  • 01_Data_Scientist/ — 20 notebooks across beginner, intermediate, and advanced levels
  • 02_ML_Engineer/ — 14 notebooks (beginner + intermediate + advanced)
  • 03_AI_Engineer/beginner/ — 5 notebooks (LLM APIs, prompt engineering, chatbot, basic RAG, deployment)
  • 03_AI_Engineer/intermediate/ — 7 notebooks (advanced RAG, LangChain, vector DBs, agents, LlamaIndex, evals, production)
  • 04_Foundations/mathematics/ — 7 mathematics notebooks (linear algebra, calculus, probability)
  • 05_Hands_On_Labs/ — 20 standalone lab notebooks + mini-projects for all 3 tracks
  • 06_Interview_Prep/data_scientist/ — 20+ Q&As, SQL challenges, coding problems
  • 07_Resources/ — Books, courses, papers, communities, tools reference
  • 08_Career_Guide/ — Portfolio guide, salary guide, networking guide
  • 00_Overview/ — Role comparison, salary data, navigation guide
  • GitHub Actions link-checking workflow
  • GitHub Codespaces devcontainer configuration
  • CONTRIBUTING.md, LICENSE (MIT), requirements.txt, .gitignore

This changelog is maintained by the repo maintainers. Community contributors are credited in the Contributors section of the main README.