tanya.engineerNotes on cloud infrastructure, AI-augmented engineering, and personal-OS work.https://tanya.engineer/en-usIdentity API: Writing Your Operating Manualhttps://tanya.engineer/blog/identity-api/https://tanya.engineer/blog/identity-api/A typed identity layer for AI agents. Schemas, evidence-backed claims and bidirectional links across 173 vault files turn freeform user context into a structured API for LLMs.Sat, 09 May 2026 00:00:00 GMTPKMLLMObsidianIva and Me: Building a Personal Operating System with Obsidian, RAG, OCR and AIhttps://tanya.engineer/blog/iva-and-me/https://tanya.engineer/blog/iva-and-me/Twenty years of handwritten diaries as the memory layer of a personal AI. How vault, RAG, OCR and an agent loop come together into a system that knows who you actually are.Mon, 04 May 2026 00:00:00 GMTPersonal OSRAGOCRAn MCP server that does not log the patient ID, on purposehttps://tanya.engineer/blog/mcp-server-patient-id/https://tanya.engineer/blog/mcp-server-patient-id/Most public MCP demos that read patient data would fail a HIPAA audit on a single grep. A walk-through of a healthcare-grade MCP server design where the patient ID never enters logs by construction.Sun, 26 Apr 2026 00:00:00 GMTMCPHealthcarePrivacyBeyond the Research Wiki: What Happens When the Data Is Youhttps://tanya.engineer/blog/beyond-research-wiki/https://tanya.engineer/blog/beyond-research-wiki/What changes when a personal knowledge base is about you, decisions, energy, health, inner life. Domain policy files, behavioral contracts for AI agents, and why one librarian with one behavior breaks down.Sun, 19 Apr 2026 00:00:00 GMTAgentsPKMPrivacyThe Architect: Building a Weekly Review Agent on Top of an Obsidian Vaulthttps://tanya.engineer/blog/weekly-review-agent/https://tanya.engineer/blog/weekly-review-agent/A structured weekly review agent with MCP read-write access to an Obsidian vault. From capability to application, and why the specificity of the workflow turned out to be the point.Thu, 16 Apr 2026 00:00:00 GMTAgentsObsidianPKMOver Two Decades of Handwriting, One Local Language Model, and an OCR Problemhttps://tanya.engineer/blog/handwriting-ocr/https://tanya.engineer/blog/handwriting-ocr/Building a Cyrillic handwriting OCR pipeline for 20+ years of personal diaries. TrOCR, LoRA fine-tuning, and why the hardest part is not the model.Sun, 12 Apr 2026 00:00:00 GMTOCRLocal LLMPrivacyFrom Scattered Notes to Living System: Obsidian, Claude, and a Personal OShttps://tanya.engineer/blog/from-scattered-notes/https://tanya.engineer/blog/from-scattered-notes/How I built a local REST API over an Obsidian vault, connected it to a React dashboard, and added an MCP layer for AI-driven read-write access. Treating personal knowledge management as infrastructure.Wed, 08 Apr 2026 00:00:00 GMTPKMObsidianMCPMy experience participating in an AWS workshop as an AWS Certification SMEhttps://tanya.engineer/blog/aws-certification-sme-workshop/https://tanya.engineer/blog/aws-certification-sme-workshop/A look behind the curtain of AWS certification creation. How Subject Matter Experts develop and refine exam questions, the workshop format, and what the program is actually like from the inside.Sun, 19 May 2024 00:00:00 GMTAWSCertificationsSME