sysdesign-design
lsh1215/sysdesign-challenges
Design partner mode for system design practice. Activated when the user wants to design a new system (chat, notification, news feed, URL shortener, etc.). Sets up topic directory, copies the mock-interview template, loads the matching problem from sysdesign-question-bank, marks the topic as active in .omx/state/, and conducts a back-and-forth Clarifying → High Level → Drill Down conversation, updating <topic>/System-Design-Document/mock-interview.md immediately as each decision lands. Uses Alex Xu Vol.1's canned numbers as the starting point (book-first), user adjusts. NOT an interview — the user drives, this skill is a design collaborator with a calculator (back-of- envelope, latency estimation via auto-injected sysdesign-frameworks) and a reference book (sysdesign-question-bank).
sysdesign-impl
lsh1215/sysdesign-challenges
Scaffold a minimum-viable implementation of a designed system. Activated when the user is ready to write code. Reads sdd.md (or falls back to mock-interview.md), determines the smallest component subset that lets the design's NFRs be testable (NOT a full production build — single-region, in-memory or single-container infra, no CDN, no multi-region), asks the user for the language/framework stack (default Spring Boot + PostgreSQL + Kafka per project's existing skill set), then scaffolds <topic>/source/ with per-service directories, a docker-compose.yml that brings everything up locally, and test-results/ scaffolding for functional / load / failure tests. The point is verification of design assumptions, not production.
sysdesign-sdd
lsh1215/sysdesign-challenges
Promote a filled mock-interview.md into a formal Software Design Document (sdd.md) following the IEEE 1016 / Atlassian / Google design-doc style. Activated when the user says they are ready to write the SDD. Reads the topic's mock-interview.md AND the topic's conversation log files (which capture the back-and-forth detail not preserved in the structured mock-interview), then asks the user the SDD-specific questions that mock-interview doesn't cover (Constraints, ADRs, Risk Register, Rollout, Testing strategy). Writes sdd.md incrementally as decisions land.
