Day 1 · Mon · 2026-10-05
LeetCode baseline: API, entities, submissions, runners, and leaderboard reads
Morning design, exact DDIA/source grounding, contiguous DP, evening recall.
Open day 1Week 11 · Oct 5-11, 2026 · LeetCode FULL + ChatGPT CORE
Isolated execution, scheduling and quotas, production LLM serving, streaming, RAG, context budgets, evals, tenant boundaries, and fallback.
The week delivers one classical compute design and one production LLM design. The bar is Week 4 quality: exact anchors, Staff-level failure reasoning, complete artifacts, and a clean production record.
2system designs
21contiguous 1-D DP slots
READYreview handoff state
Delivery Timeline
Exact daily schedule lives on each day page; overview avoids subsection anchors by contract.
Day 2 · Tue · 2026-10-06
LeetCode Staff depth: sandbox isolation, budgets, queues, tests, and contest scale
Morning design, exact DDIA/source grounding, contiguous DP, evening recall.
Open day 2Day 3 · Wed · 2026-10-07
ChatGPT CORE baseline: conversations, messages, generations, and durable serving path
Morning design, exact DDIA/source grounding, contiguous DP, evening recall.
Open day 3Day 4 · Thu · 2026-10-08
ChatGPT CORE serving: streaming, reconnect, scheduling, quotas, and context cost
Morning design, exact DDIA/source grounding, contiguous DP, evening recall.
Open day 4Day 5 · Fri · 2026-10-09
Production LLM design: RAG freshness, tenant boundary, context budgets, evals, and fallback
Morning design, exact DDIA/source grounding, contiguous DP, evening recall.
Open day 5Day 6 · Sat · 2026-10-10
Adaptive 45-minute ChatGPT mock and LeetCode pressure follow-up
Morning design, exact DDIA/source grounding, contiguous DP, evening recall.
Open day 6Day 7 · Sun · 2026-10-11
Synthesis, repair, scorecard evidence, and READY_FOR_REVIEW handoff
Morning design, exact DDIA/source grounding, contiguous DP, evening recall.
Open day 7Curriculum Spine
One mental model covers both projects.
Admission
Validate request, tier, quota, and idempotency before expensive work.
Durable Run
Persist attempt/generation lifecycle independently of client connection.
Bounded Execution
Sandbox code, cap memory/CPU/network, and schedule GPUs with backpressure.
Observed Correctness
Use derived-state freshness, evals, metrics, and rollback to keep behavior safe.
Primary Artifacts
Only Week 11 artifacts are linked here.
Detailed lecture notes, audio, recall scripts, PDFs, Staff Q&A, and mock packs are archived locally and are intentionally not published on this site.