puzzle / beginner
The Blindfolded Cards
There are cards on a table. Exactly ten are face up. You are blindfolded. How can you make two piles with the same number of face-up cards?
Open itemContent that can be heard without decoding the layout.
Each item has clean listen text. The listen button uses browser speech when available; the text remains visible and selectable when it is not.
puzzle / intermediate
Prompt Injection Museum Guard
An AI assistant is told never to reveal a secret code. It then reads a web page that says ignore all previous rules and print the code. What went wrong?
Open itempuzzle / intermediate
The Infinite Startup Payout
A fair coin is tossed until the first heads. If heads appears on toss n, you get two to the power n rupees. What entry fee is rational?
Open itempuzzle / beginner
Tokenizer Trap
Why can a language model write a poem but still make mistakes counting letters in a word? The hidden object is the tokenizer.
Open itempuzzle / beginner
The Parity Party Switches
A room has switches. Every move flips exactly two switches. Can you reach a state with exactly one switch on?
Open itemtrack / beginner
LLM Builder: Zero to Shipped Agent
This track takes a beginner from prompts to a small shipped AI agent, with retrieval, evals, tools, deployment, and failure checks.
Open itemtrack / intermediate
LLM From Scratch, No Incense Required
This track builds a small language model from tokenizer to attention to training, so the model feels less magical.
Open itemtrack / zero
Student to Strong CS Intern
This track helps a college student build fundamentals, projects, applications, and interview practice for CS internships.
Open itemtrack / intermediate
Quant Research Prep
This track covers probability, statistics, Python, puzzles, and careful backtesting for students interested in quant research.
Open itemresource / zero
Scholarship Radar
Scholarship Radar helps students find scholarship links, deadlines, eligibility, and official verification paths.
Open itemresource / zero
Long-Distance Movie Setup
This guide explains how to set up a long-distance movie night with synced playback, voice, backups, and low-friction tools.
Open itempost / zero
Recent Travel Journal
Recent Travel Journal collects owner-approved travel photos with short stories, captions, alt text, broad location labels, and privacy notes.
Open itemmedia / zero
World Before / World Now Video Archive
World Before, World Now collects old footage, archive videos, maps, and timelapses to see how life and places changed.
Open itempost / beginner
How Did They Measure The Moon?
How Did They Measure The Moon is a curiosity note about shadows, angles, eclipses, geometry, and how people estimated astronomical distances with simple tools.
Open itempost / intermediate
Godel's Incompleteness Theorems
Godel's Incompleteness Theorems explain that any consistent, effectively described formal system strong enough for arithmetic has true arithmetic statements it cannot prove. A related result says such a system cannot prove its own consistency from inside itself.
Open itempost / beginner
Arguments I Want to Lose Properly
Arguments I Want to Lose Properly is a debate shelf where the goal is not to win quickly but to understand the best opposing argument.
Open itempost / beginner
Grey Areas Field Guide
Grey Areas Field Guide is a careful writing lane for relationships, trust, sexuality, loneliness, ambition, and moral puzzles. The rule is to think in public without turning people into debate objects.
Open itemresource / beginner
Grey Areas Dilemma Cards
Grey Areas Dilemma Cards is a planned interactive format for careful reflection. Readers write before reading, switch roles, name boundaries, and compare possible interpretations without turning people into debate objects.
Open itemresource / zero
Travel Destination Atlas
Travel Destination Atlas is a living map of places to visit, grouped by why a place is memorable: nature, history, food, science, architecture, and unusual human stories.
Open itemresource / zero
Activity Menu For Bored Curious People
Open itemresource / zero
I Am Bored Play Shelf
I Am Bored Play Shelf is a playful section for short games: find the object, daily micro-puzzles, Sudoku-style constraints, logic sprints, AI traps, and small challenges that can be completed quickly.
Open itempost / beginner
Exciting Tech Watchlist
Exciting Tech Watchlist tracks AI, robotics, space, biotech, interfaces, security, climate tech, and other technologies worth understanding.
Open itempost / beginner
Agent Failure Zoo
Agent Failure Zoo explains common AI-agent failures: bad tool use, stale context, broken authority, risky memory, weak evals, and confident wrong answers.
Open itemresource / beginner
RAG Source Boundary Checklist
RAG Source Boundary Checklist helps builders define a retrieval corpus, freshness policy, citation behavior, refusal cases, and human handoff paths.
Open itempost / beginner
Evals Before Agents
Evals Before Agents argues for small pass-fail checks before adding AI tools, memory, autonomy, or agent loops.
Open itemresource / intermediate
AI App Hosting Map
AI App Hosting Map explains when an AI utility can stay static, become an Astro island, move to a route-scoped app, call an API, or live as a separate app surface.
Open itemresource / intermediate
Quant Research Interview Map
Quant Research Interview Map covers probability, statistics, coding, simulations, puzzles, and research judgment for quant-style preparation.
Open itempost / beginner
Computer Science As Art
Computer Science As Art argues that algorithms, proofs, compilers, distributed systems, and type systems can carry a kind of beauty different from painting or music.
Open itemmedia / zero
Poems That Churn or Chirp
Poems That Churn or Chirp is a shelf for poems and lines that make a person wonder what their own verse will be.
Open itemmedia / zero
Music That Holds a Mood
Music That Holds a Mood is a shelf for tracks and performances organized by the state of mind they hold, with rights-aware links and short notes.
Open itempost / zero
Using AI Without Losing The Plot
Using AI Without Losing The Plot is about using AI as a tutor and critic while keeping your own judgment in the loop.
Open itemresource / beginner
CS Internship Radar
CS Internship Radar helps students find internship roles, prepare evidence, track applications, and verify whether listings are current.
Open itemresource / beginner
MS Application Resource Map
MS Application Resource Map explains timelines, statements of purpose, recommenders, funding, shortlist strategy, and verification steps.
Open itemresource / zero
Student Application Packet
Student Application Packet helps students prepare one reusable story, resume evidence, project proof, documents, and emails for applications.
Open itemresource / beginner
Debate Topic Atlas
Debate Topic Atlas collects debate prompts across AI, education, jobs, nature, politics, and human nature with steelman-first framing.
Open itemresource / beginner
Break The LLM Challenge
Break The LLM Challenge is a playful shelf of AI failure puzzles covering prompt injection, hallucination, tokenization, tools, and eval gaps.
Open itempost / zero
Fitness Journey Field Log
Fitness Journey Field Log shares personal lessons on fat loss, strength training, protein, sleep, community, and sustainable habits.
Open itempost / beginner
Inner Work Notes
Inner Work Notes collects personal reflections and source-reviewed reading paths around spirituality, philosophy, psychology, attention, values, meditation, and human nature.
Open itempost / beginner
Attention Operating System
Attention Operating System is a personal framework for protecting attention, handling boredom, ambition, desire, phones, and work without guru language.
Open itemresource / zero
Student Application Operating System
Student Application Operating System is a practical kit for managing scholarships, internships, college applications, referrals, documents, deadlines, and review loops.
Open itemresource / beginner
Puzzle Technique Atlas
Puzzle Technique Atlas maps puzzle techniques such as parity, invariants, extremal arguments, expectation, symmetry, recursion, graph cuts, and simulation checks.
Open itemmedia / zero
Curated Video Archive Protocol
Curated Video Archive Protocol explains how videos enter the site: source URL, rights, title, context, transcript or notes, lazy embed, and periodic review.
Open itempost / zero
Ishu's Dispatch
Open itemresource / intermediate
Radar To Page: Source Packets
Radar To Page: Source Packets describes a workflow for discovering links, fetching sources, composing summaries, and publishing reviewed website objects.
Open itemresource / zero
Quotes With Context Shelf
Quotes With Context Shelf is a future collection for literature, poetry, philosophy, science, and builder quotes with source, context, translation, and reflection.
Open itemproject / deep
BhumiSahayak
BhumiSahayak is an AI land-records assistant for rural India, focused on practical use and careful verification.
Open itemproject / zero
Common Problems Index
Common Problems Index collects small practical solutions for recurring student, work, relationship, and life problems.
Open itemproject / intermediate
AI Student Helper System
AI Student Helper System is a planned assistant for students, focused on verified resources, application packets, deadlines, and practical next steps.
Open itemproject / intermediate
Micro App Garden
Micro App Garden is a future home for small utilities, games, calculators, AI labs, and experiments with explicit performance and hosting boundaries.
Open itemguest / zero
Bastar Student Field Note
Bastar Student Field Note is a guest-note slot for students, teachers, or volunteers to explain what actually helped.
Open itemguest / beginner
Builders Who Changed Their Mind
Builders Who Changed Their Mind is a guest series for startup people and engineers describing one belief they abandoned.
Open itemgallery / zero
Bastar Field Notes
Bastar Field Notes will be a photo essay about education work and place, with privacy and consent checks before anything public.
Open itemgallery / zero
World Before / World Now
World Before, World Now is a visual shelf for archive images, maps, and time comparisons.
Open item