This Week I Learned - Week 13 2026

This Week I Learned - 

* Anthropic's Claude Code, a closed-source AI coding CLI tool, leaked ~512,000 lines of TypeScript source code on March 31, 2026, via an exposed source map in its npm package, revealing internal architecture, 44 feature flags, and 20 unreleased features; the company responded with DMCA takedowns on original copies.

A developer quickly rewrote the codebase in Python using OpenAI's Codex, creating a functional derivative hosted on GitHub that evades copyright claims, amassing 29k stars and 40k forks in hours as an educational open-source alternative.

This incident underscores AI's role in accelerating code replication, challenging traditional IP protections for software—Anthropic may overlook enforcement to avoid precedents that could restrict LLM training or generation of similar derived works.

* Andrej Karpathy compares LLMs to probabilistic CPUs that handle tokens statistically, in contrast to the traditional deterministic computation based on bytes.

The agent-as-kernel framing positions it as the orchestrator for LLM execution, managing prompts, skills, and tools in loops, as echoed in Guido van Rossum's prompt-skills-tools definition.

* Sarvam is India's voice-first, multilingual AI that can support 22 Indian languages.

* Microsoft favors Linux: Python support for Azure App Service on Windows and Azure Functions on Windows will be retired, and Python applications on these platforms will cease to run. To maintain Python workloads, create a new app on Azure App Service on Linux or Azure Functions on Linux, and redeploy your Python applications before 31 March 2027.

* SentrySearch is an open-source Python tool (>1.7K Stars on GitHub) for semantic video search, allowing users to query descriptions like "red truck running a stop sign" to instantly extract and export matching clips from raw MP4 files.

Technically, it chunks videos into 30-second overlapping segments, embeds them via Google's Gemini API or local Qwen3-VL models (2B/8B variants with quantization for efficiency), stores in ChromaDB, and retrieves via cosine similarity, running fully offline on Apple Silicon or NVIDIA hardware with at least 6GB VRAM.

Local AI video tools like SentrySearch are great for tasks like CCTV analysis and dashcam reviews, offering privacy advantages over cloud services, though they do require significant GPU resources.

* A DOI (Digital Object Identifier) is a unique and permanent alphanumeric code assigned to a work, such as a journal article or book, ensuring consistent access and citation regardless of any changes to its location.

The DOI Foundation is a not-for-profit organization that governs the ISO standard for the DOI system

* ORCID is a free, unique, persistent identifier (PID) for individuals to use as they engage in research, scholarship, and innovation activities. ORCID allows universities and research institutions to stay up to date with their researchers’ outputs, reduce administrative burden and input errors, and helps their researchers, post-docs, employees, and students improve the discoverability of their work.

* ResearchGate is a commercial social networking site for scientists and researchers to share papers, ask and answer questions, and find collaborators. 

* LaTeX (pronounced “LAY-tek” or “LAH-tek”) is a tool for typesetting professional-looking documents.

A LaTeX document is a plain text file interspersed with LaTeX commands used to express the desired (typeset) results. To produce a visible, typeset document, your LaTeX file is processed by a piece of software called a TeX engine which uses the commands embedded in your text file to guide and control the typesetting process, converting the LaTeX commands and document text into a professionally typeset PDF file. This means you only need to focus on the content of your document and the computer, via LaTeX commands and the TeX engine, will take care of the visual appearance (formatting).

* Overleaf is a collaborative LaTeX editor that automatically compiles your work in the background as you type. This online tool makes writing, editing, and publishing scientific documents faster and easier, streamlining the entire process.

* Zenodo is a platform for hosting and sharing data, software and other research artifacts with DOIs. It supports open data and open access initiatives in Europe and integrates with GitHub. 

Zenodo code is itself open source. The code, work-in-progress and open issues are shared openly in GitHub. All meta data is openly available under CC0 licence, and all open content is openly accessible through open APIs.

The simple web interface is supplemented by a rich API which allows third ­party tools and services to use Zenodo as a backend in their workflow.

Zenodo is derived from Zenodotus, the first librarian of the Ancient Library of Alexandria and father of the first recorded use of metadata, a landmark in library history. 

* Matomo, previously known as Piwik, is an open-source web analytics tool that serves as an alternative to Google Analytics, giving users complete ownership of their data.

* kaun.city is an open civic accountability platform for Indian cities. It is "infrastructure for civic accountability" revealed through a map. Although Bengaluru is showcased first due to having the richest data, it’s designed to work for any Indian city. This social initiative led Bharat Jilledumudi is open source and if you want this for your city, open a GitHub issue and provide the following -

• Ward boundary GeoJSON (usually available via datameet or municipal GIS portals)
• Elected rep data (MyNeta has every state)
• Work order / tender data (most municipal corporations publish this)

The architecture is city-agnostic: ward boundaries, elected reps, budget data, contractor profiles, RTI generation - all driven by a city config file.

The contractor entity resolution engine, blacklist cross-referencing, and the civic news pipeline work across any city once the base data is loaded.

* For those who think climate change is a hoax, here is more proof - Kyoto's Cherry blossoms are blooming earlier than any time in recorded history (812-2026 CE). After a millennium of relative stability, bloom dates have shifted dramatically earlier since the Industrial Revolution, a proxy for warming spring temperatures.

Source - John Bistline

* By the time WhatsApp was acquired by Meta, it had fewer than 30 engineers serving 450 million monthly active users. Due to the high trust environment, there were no code reviews according to Jean Lee, engineer #19 at the company.

* Like a rotary phone, the manual typewriter appears simple but is not intuitive to the smartphone generation...the dinging bell signifies the end of a line and the need to manually return the carriage to start the next line. ("Oh," said one student, "that's why it's called 'return."')

* HP, Canon, and Epson hold over 75% of the consumer printer market.

* A VPN gives you a different postal address, but your timezone, language, DNS, WebRTC, browser fingerprint, and login details are still the same. Netflix, Google and Spotify don’t care about your IP address. They care about your account. Your registered country is stored in their database, not in your connection. 

* Starting April 1, 2026, India requires mandatory cybersecurity certification for internet-connected CCTV cameras, effectively halting sales from major Chinese makers like Hikvision, Dahua, and TP-Link due to concerns over chip origins and vulnerabilities. Domestic companies such as CP Plus, now holding 45-50% market share, have filled the gap by switching to Taiwanese chips and securing approvals for over 500 models, though prices rose 15-20%. This push boosts homegrown tech like L&T's indigenous chips for millions of cameras, aiming for secure surveillance amid smart city growth, even as some buyers miss familiar options. 

* Naming changes in 2026 -

The two confusing terms: Previous Year (you earn) + Assessment Year (you file) have been replaced with one unified term - "Tax Year"

Tax Year 2026=income earned from Apr 2025-Mar 2026

Form 16 is now Form 130 - Salary TDS certificate from employer

Form 16A is Form 131 - TDS certificate for non-salary income

Form 26AS / AIS is now Form 168 - Summary of all taxes linked to PAN

Form 26Q is Form 140 - TDS return for non-salary payments

* Since 2003, on a five-year rolling return basis, the Mutual Fund category ELSS (equity-linked savings schemes) has outperformed Flexi-cap funds 53 per cent of the time and the Nifty 500 TRI index 58 per cent of the time. 

* There is zero tax advantage to an SWP (Systematic Withdrawal Plan) over a manual redemption of the same amount. SWP has a "tax advantage" when compared to the IDCW (Dividend) option, not manual redemptions. Dividends are taxed at your Income Tax Slab Rate (can be up to 30%+). SWP/Redemption is taxed as LTCG (12.5% above ₹1.25L) or STCG (20%).

 

* Ramayana: The Legend of Prince Rama is a 1993 anime film by Yugo Sako. In the United States, the film was released as The Prince of Light: The Legend of Ramayana, or Warrior Prince in 2001. This version was released in a localized English dub with narration by James Earl Jones and prince Rama voiced by Bryan Cranston (best known for his work on the hit 'Breaking Bad' series).

* Our ability to flourish comes not from life’s wins and losses, but from how we navigate them. To flourish is to have a life that feels meaningful and rich, despite the challenges we’ll inevitably face. Flourishing falls into a few main categories: awareness, connection, insight and purpose.