Worked examples
Not screenshots — real builds. Each example is driven end to end through the spectastic lifecycle, artifacts and all, so you can read exactly how the decisions were made.
Over-engineered tic-tac-toe
A tic-tac-toe you can't beat — six AI opponents from Random to Monte Carlo Tree Search, on boards from 3×3 to 5×5, two- and three-player. Watch every decision get driven through principles, spec, design, tasks, a verification pass that proves the perfect players never lose, a triage log that closes a real defect, and a change proposal — applied — that grows the board.
A portfolio engine in Java
Real-time positions, portfolio weights, and FIFO/LIFO tax lots — a trading-desk backend in Java 21 + Quarkus, too big for one spec. Watch spectastic decompose it into an umbrella and four slices, drive it to a verified terminal state, and prove it with a passing suite — not a toy. Includes a FIFO-vs-LIFO calculator, the real code, and the mvn verify run.
Vibe to learn, spec to keep
The other examples start where you know what you're building. This one starts where you don't. Watch explore quarantine a throwaway shortest-path spike — build BFS and Dijkstra loosely to learn that “shortest” means least weight — with the lifecycle refusing to ship it until it graduates as a tracer-bullet. Includes a live BFS-vs-Dijkstra pathfinder and the anti-ship guard going red.
I know kung fu
A design needs one domain fact — the minimum touch-target size — and a model guesses wrong: 44px, not the AA floor of 24. Watch a knowledge corpus correct it, live: a decision flips from a loud ASSUMED guess to a verified, edition-pinned citation. Includes an “I know kung fu” toggle and the real validate gates going green.
As of when?
A cash balance is a question about time. Point-in-time IBOR/ABOR snapshots grounded on a settlement corpus — then US equities move T+2 → T+1, the corpus supersedes its edition, and a propose → apply change re-grounds the spec. A Rust engine, proven by cargo test; includes a live as-of timeline across the 28 May 2024 cutover.
Session token rotation
A single, focused spec rendered in the house style — status meta, budget gauges, requirements, a decision, and an options table. The anatomy of one artifact, up close.
Read the spec →Per-tenant rate limiter
A production-shaped feature at enterprise rigor — SLOs on every NFR, an eight-category enforcement floor, grounded decisions, and umbrella slices. Plus a simulator: watch a burst get shaped by a token bucket vs. a sliding window.
Read the build →Every example is one or more self-contained HTML files. Open them anywhere.