Engineering writeups from building LK Forge: AI-assisted development retrospectives, game AI deep dives, and honest build data.https://lkforge.com/en-ushttps://lkforge.com/tools/timer/human-timing-accuracy/https://lkforge.com/tools/timer/human-timing-accuracy/A live experiment, currently gathering data: stop a stopwatch at exactly 10.00 seconds and your anonymized attempt joins a public dataset. Add a data point and watch the error distribution grow.Mon, 27 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/are-online-pdf-tools-safe/https://lkforge.com/blog/are-online-pdf-tools-safe/Many online PDF tools upload your file to a server. How client-side, no-upload PDF tools work, why it matters for contracts and scans, and how to tell whether a site uploads your files.Sun, 26 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/building-a-no-upload-pdf-suite/https://lkforge.com/blog/building-a-no-upload-pdf-suite/Twelve PDF tools running fully client-side with pdf-lib, pdf.js, jspdf and SheetJS — no WebAssembly, nothing uploaded — plus the limits we chose to ship honestly.Sun, 26 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/how-pdf-compression-works/https://lkforge.com/blog/how-pdf-compression-works/Downsampling embedded images vs. rasterizing pages, why rasterizing removes selectable text, and why a small or text-only PDF may not shrink — or can grow.Sun, 26 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/pdf-to-word-what-transfers/https://lkforge.com/blog/pdf-to-word-what-transfers/Converting a PDF to Word transfers the text, not the layout. What carries over, what is lost, why scanned PDFs need OCR, and when to use Word's own import.Sun, 26 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/wwf-vs-scrabble-scoring/https://lkforge.com/blog/wwf-vs-scrabble-scoring/We scored all 172,835 ENABLE words in both games. A word can gain up to 11 points playing Words With Friends over Scrabble, but the Scrabble edge never exceeds 3 — and only 8.02% of words score identically in both.Tue, 21 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/random-word-generator-randomness/https://lkforge.com/blog/random-word-generator-randomness/We ran 20,000 seeded draws against our word generator's default 365-word pool and tested the sampling with a chi-square goodness-of-fit test: chi-square 320.572, 364 degrees of freedom, p = 0.9509 — no word is favored over any other.Tue, 21 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/how-long-is-golden-hour/https://lkforge.com/blog/how-long-is-golden-hour/Golden hour is almost never an hour — we measured its length for 27 cities with the NOAA solar-position algorithm; it runs from ~24 minutes at the equator to about 58 minutes in Berlin in December, and never reaches an hour.Tue, 21 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/enable-lexicon-study/https://lkforge.com/blog/enable-lexicon-study/We counted every letter across the 172,835-word ENABLE list. Scrabble's tile values don't match how letters actually occur: C outranks three cheaper tiles, H beats B, and 11 letters are mispriced against frequency — with the longest isograms and richest anagram set thrown in.Tue, 21 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/game-ai-three-algorithms/https://lkforge.com/blog/game-ai-three-algorithms/The six games here run on three textbook algorithms — minimax with alpha-beta pruning, expectimax, and breadth-first search. What it takes to ship them correct and frame-fast in vanilla JS, with the measured numbers: 0 losses across 1,200 tic-tac-toe games, 69.6% of 2048 runs reaching the tile.Sun, 19 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/benchmarking-game-ai/https://lkforge.com/blog/benchmarking-game-ai/Unbeatable is a testable claim, not a slogan. The headless self-play harness that runs before any strength number ships: 1,200 tic-tac-toe games with zero losses — and the honest finding that a depth-2 search still lost 2 of 200.Sun, 19 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/search-in-one-browser-tab/https://lkforge.com/blog/search-in-one-browser-tab/No backend, no worker thread — adversarial search runs between two frames on the player's own device. How alpha-beta pruning (a 93% node cut, 549,945 → 36,528) and adaptive depth keep it under the frame budget at ~0.3 ms per move.Sun, 19 Jul 2026 12:00:00 GMThttps://lkforge.com/blog/26-repos-in-29-days/https://lkforge.com/blog/26-repos-in-29-days/Real numbers from a one-month AI-assisted build sprint: 26 repositories, 1,549 commits, 335 pages — the commit data, the structural failures that mattered, the 93% token-cost finding, and the rules that survived.Sun, 12 Jul 2026 12:00:00 GMT