# Rajdeep Mondal > Rajdeep Mondal builds AI systems that can defend their answers. He owns Polly Lens at Elucidata. He writes about founder judgment, proof, and hard systems. Rajdeep Mondal builds AI systems that can defend their answers. Current work: Polly Lens at Elucidata, PMCGrab, Vaidya, and Claude Code, Under The Hood. Direction: founder judgment built through painful problems, trust, and proof. ## Operating standard - Fluency is not evidence. The system must show sources, cite what matters, and say when it does not know. - Founder judgment is trained through problem selection, product judgment, distribution, writing, and proof. This context was generated from 189 published essays. Latest archive update: 2026-08-26T12:00:00.000Z. Every essay also serves a plain markdown mirror at its canonical URL plus a .md suffix. ## Core pages - [Home](https://www.rajdeepmondal.com/): Canonical entry point and public profile. - [About](https://www.rajdeepmondal.com/about): Founder profile, current role, principles, and collaboration fit. - [Resume](https://www.rajdeepmondal.com/resume): Printable CV for hiring and collaboration scans. - [Projects](https://www.rajdeepmondal.com/projects): AI systems, open-source tools, and public code. - [Writing map](https://www.rajdeepmondal.com/writing): Guided paths into AI systems, course notes, field guides, books, letters, essays, and the complete archive. - [Claude Code, Under The Hood (series)](https://www.rajdeepmondal.com/series/claude-code-under-the-hood): A field guide to how systems like Claude Code and Codex work, told as one building argument in five acts: the anatomy of a single turn, what that turn costs, the disciplines of acting well, scaling past one agent, and the shape every coding agent converges on. - [Contact](https://www.rajdeepmondal.com/connect): Best route for specific collaborations and technical notes. ## Machine-readable indexes - [Sitemap](https://www.rajdeepmondal.com/sitemap.xml): Complete URL inventory for indexable pages. - [RSS feed](https://www.rajdeepmondal.com/feed.xml): Latest archive entries as RSS. - [Search index](https://www.rajdeepmondal.com/search.json): JSON index with title, summary, body excerpt, tags, date, and path. - [Full LLM context](https://www.rajdeepmondal.com/llms-full.txt): Expanded context with every published essay summary. ## Projects - [Multi-agent metadata curation](https://www.biorxiv.org/content/10.1101/2025.06.10.658658v1): A multi-agent system that reads GEO entries and their papers, then extracts, normalizes, and infers the metadata fields a dataset is missing. 93% recall across 23 fields Status: complete. Tags: Agents, Biomedical, Ontologies, Evaluation. - [PMCGrab](https://github.com/rajdeepmondaldotcom/pmcgrab): Extracts PubMed Central papers into structured JSON: sections, tables, figures, references. 98% accuracy across 7,500+ papers Status: active. Tags: Python, NLP, RAG, Data Processing. - [ACE AI](https://www.aceaiinterview.site/): AI engineering interview prep with a 2,049-question bank across 28 topics, built around study, quiz, review, and progress loops. 2,049 answers, ~650 users in three weeks Status: active. Tags: Product, Interview Prep, AI Systems, Spaced Repetition. - [Oncopacket](https://github.com/monarch-initiative/oncopacket): A Python package that converts cancer data into GA4GH phenopackets, so records from different studies can be read by the same tools. 23,650 phenopackets released Status: active. Tags: Python, Phenopackets, GA4GH, Open source. - [Vaidya](https://github.com/rajdeepmondaldotcom/vaidya): Voice-first navigator for Indian public health schemes. A caller asks in their own language and hears which coverage they can claim. 23 languages, near-zero false positives Status: active. Tags: Voice, Multilingual, Public Health, Agents. - [Caliper](https://github.com/rajdeepmondaldotcom/caliper): Local-first analytics for AI coding spend. It reads Codex CLI and Claude Code logs on disk, prices usage at API rates, and breaks cost down by project, PR, model, and session. $200 plan, ~$8.5K of work a month Status: active. Tags: Python, CLI, Cost Analytics, Local-first. - [WHOOP MCP Server](https://github.com/rajdeepmondaldotcom/whoop-mcp-server): Read-only MCP server that connects WHOOP records to Claude, ChatGPT, and other MCP clients so health and training questions are answered from computed data. 24 WHOOP tools plus prompts and resources Status: active. Tags: MCP, Health Data, Python, OAuth. ## Selected essays - [Dayara Bugyal: Twenty-One Kilometers, Sixteen Months Later](https://www.rajdeepmondal.com/writing/dayara-bugyal-return): Summary: The same twenty-one kilometers sixteen months later, walked as a measurement. Published 2026-02-01T12:00:00.000Z. 10 min read. Tags: trekking, travel, adventure, mountains, growth. - [The Battlefield Moved](https://www.rajdeepmondal.com/writing/battlefield-moved-yc-ai-camp): Summary: Notes from YC's AI Startup School, where the field moved past chat. Published 2025-06-19T12:00:00.000Z. 18 min read. Tags: ai, startups, agents, technology, founders. - [Goechala: Sixty-Five Kilometers to One Sunrise](https://www.rajdeepmondal.com/writing/goechala-trek): Summary: Ten days and sixty-five kilometers for one sunrise on Kanchenjunga. Published 2025-05-04T12:00:00.000Z. 7 min read. Tags: trekking, travel, adventure, mountains. - [Stack Money for the Wrong Reasons](https://www.rajdeepmondal.com/writing/stack-money-for-the-wrong-reasons): Summary: On ugly motivation that works, and the permission money buys. Published 2024-10-09T12:00:00.000Z. 5 min read. Tags: letters, money, motivation, power, self-improvement, mindset. - [Dayara Bugyal: The Trek I Was Not Fit For](https://www.rajdeepmondal.com/writing/dayara-bugyal-trek): Summary: Six monsoon days to 11,830 feet, booked before the fitness existed. Published 2024-09-29T12:00:00.000Z. 9 min read. Tags: trekking, travel, adventure, mountains, beginnings. - [Let Your Calm Be the Threat](https://www.rajdeepmondal.com/writing/let-your-calm-be-the-threat): Summary: On the three advantages built before the meeting, and the last dollar left on the table. Published 2024-08-31T12:00:00.000Z. 7 min read. Tags: letters, negotiation, business, mindset, self-improvement. - [Become Undefinable](https://www.rajdeepmondal.com/writing/become-undefinable): Summary: On refusing a label, because a label names your replacements. Published 2024-07-24T12:00:00.000Z. 13 min read. Tags: letters, discipline, self-improvement, motivation, mindset, entrepreneurship. - [Keep Your Mind Fed](https://www.rajdeepmondal.com/writing/keep-your-mind-fed): Summary: On the attention diet, and the week of inputs that changed nothing. Published 2024-06-07T12:00:00.000Z. 5 min read. Tags: letters, focus, self-improvement, mindfulness, learning. - [Clean Up Your Mind](https://www.rajdeepmondal.com/writing/clean-up-your-mind): Summary: On a messy mind as a systems problem with five inputs. Published 2024-05-27T12:00:00.000Z. 5 min read. Tags: focus, self-improvement, productivity, mindfulness. - [Nothing You Do Not Earn Stays Free](https://www.rajdeepmondal.com/writing/nothing-you-dont-earn-stays-free): Summary: On help that builds strength against help that replaces it, with terms attached. Published 2024-04-29T12:00:00.000Z. 5 min read. Tags: letters, self-reliance, discipline, wisdom, giving. - [Earn Your Name in Private](https://www.rajdeepmondal.com/writing/earn-your-name-in-private): Summary: On a name measured by what your weeks contain when nobody watches. Published 2024-04-23T12:00:00.000Z. 6 min read. Tags: letters, humility, service, character, self-improvement, leadership. - [Keep Your Heart, Trust Your Eyes](https://www.rajdeepmondal.com/writing/keep-your-heart-trust-your-eyes): Summary: On reading people by the patterns that cost them something. Published 2024-04-11T12:00:00.000Z. 5 min read. Tags: letters, trust, self-improvement, relationships, wisdom. ## Optional - [All writing](https://www.rajdeepmondal.com/writing): Browse guided writing paths and the complete archive. - [GitHub profile](https://github.com/rajdeepmondaldotcom): Open-source work and repositories. - [LinkedIn profile](https://www.linkedin.com/in/rajdeep-mondal/): Professional profile. - [X profile](https://x.com/_rajdeepmondal): Short-form notes and public updates.