Coach Hub

LLM-maintained. Updated after every retro or scorecard. Read by /coach to get current week state without scanning Private/ for the right weekly file.

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Current Week Pointer

current_week: W06 / Sprint S2 (Jun 29–Jul 5, 2026) — Backtracking + SD (KV Store + Consistent Hashing)
current_week_file: Private/Project_2026/Weekly Tracker/Week 06 (Jun 29–Jul 5) — Backtracking.md
week_number: 6
week_end_date: 2026-07-05
calendar_slip: +1 week vs original plan (Jun 8–21 DDIA detour)
sd_resequenced: Rate Limiter done (S2); current-week SD = Design KV Store + Consistent Hashing; next week (W07) SD = URL Shortener + Unique ID Generator (user call 2026-07-02)

Update this block every Sunday night after retro.

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W05 Status Summary — FINAL (scored 2026-07-02, late retro)

Pattern: Tries (3) + Heap (7) — Sprint S1 DSA score: 8/10 on time | 2 fail: 621 (used simulation not O(N) formula, 43:30/30), 355 (k-way merge needed hints, 36:00/35 — same gap as LC 23 in W2) Both hards solo: 212 (24:00/45), 295 (9:00/40). Strongest: heap core (703 3:00, 215 5:00). Gate verdict: PASS STRONG → S2 Backtracking

Non-DSA: URL Shortener SD deferred (did Rate Limiter in S2). Redis started (notes + build-your-own topic list). DDIA Ch6 not logged. Fix carried: drill LC 23 → 355 no-hints (merge pattern failed twice).

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⚠️ Re-baseline note (Jun 21)

Jun 8–21 deviation: after W4 (Jun 7) DSA stopped. Two weeks (W5+W6 calendar) went to DDIA Ch1/Ch2 deep formatting + building /ddia skill — off critical path. No problems, no apps, no DMs. W5/W6 trackers never created.

REPLAN (Vatsal, Jun 21): Compressed into an 8-week sprint Jun 22 → Aug 15 — finish ALL DSA + HLD/SD problems + Redis playlist, THEN apply from mid-Aug. ~90 NeetCode left at ~11/wk. Full week-by-week table: [[Coach/project_dsa_sd_curriculum]]. Sprint weeks labeled S1–S8.

Decisions applied (Vatsal, Jun 21):

• Applications + referral DMs → AUGUST (was W3-mandatory). Tracked, no gate. Risk: 90-day notice + Aug apps → offers ~Dec, tight vs Nov 11.
• DDIA → merged into SD track (lunch slot, 1 ch/2wk; no marathons).
• DSA → compress + slip 1 week. Tries + full Heap folded into W05.
• STAR reps → dropped from weekly gate (resume before first screen).

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W01 Status Summary — FINAL (scored 2026-05-19)

Problems solved: 15/15 on time, solo — W1 GATE: PASS — STRONG Total solve time: ~192 min vs 420 min target (finished in 46% of allocated time) Weakest pattern: Binary Search — Search Rotated Array 28/30 min (tightest problem in set) Strongest patterns: Two Pointers + Stack (all problems well under time limits)

Non-DSA goals:

• ✅ Resume rewrite (May 13)
• ✅ LinkedIn rewrite (May 14)
• ✅ 30 target companies list (May 16)
• ✅ Splunk + Amazon contact list 5+5 (May 16)
• ❌ STAR drills → CARRY TO W2 (WebSocket geo 10 reps + AskTGE 5 reps)
• ❌ Pre-screen Q drafts → CARRY TO W2 (3 answers)
• ✅ SD theory: Databases + Introduction to System Design completed (W1)

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W02 Status Summary — FINAL (scored 2026-05-25)

Pattern: Linked List — 15 problems (NeetCode 11 + 4 extended) DSA score: 13/15 on time | 1 FAIL (LC 328 — timer blown 34/25 min) | 1 asterisked (LC 23 — heapq taught mid-session) Gate verdict: PASS STRONG → W3 Trees pt 1

Non-DSA results:

• ✅ SD theory: Caching done
• ❌ SD theory: Async Systems + Resiliency + Essentials → CARRY TO W3 (3 sections, ~6.75h)
• ❌ BA drills: WebSocket geo 3/10, AskTGE 1/5 → CARRY TO W3 (7 + 4 reps remaining)
• ✅ Drill Qs: all 3 drafted
• ❌ Drill Qs: 0/3 rehearsed → CARRY TO W3

Pattern to fix: Default to insertion-at-front rotation (328, 25). Canonical LL patterns — two-chain rejoin, getKth+standard reversal — must be first instinct. heapq API must be pre-loaded before W5.

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W03 Status Summary — FINAL (scored 2026-05-31)

Pattern: Trees pt 1 — NeetCode Trees (Easy + Medium, 13 problems) DSA score: 13/13 on time | ~86 min vs 265 min target (32% of time used) Gate verdict: PASS STRONG → W4 Trees pt 2

Non-DSA results:

• ✅ SD theory: Async Systems + Resiliency + Essentials (3/3 sections done)
• ✅ Drill Qs: all 3 rehearsed
• ❌ STAR reps: 0/3 → CARRY TO W4 (3rd week running)
• ❌ Referral DMs: 0/10 → CARRY TO W4, mandatory by Jun 7

Pattern to fix: nonlocal mutation reflex (LC 1448 self-corrected). When DFS can return a value, return it — don't mutate outer state. SD theory: switch to 25-min Pomodoros, not marathon sessions.

W3 problem set (Trees pt 1):

1. Invert Binary Tree (LC 226) — E — 10 min
2. Maximum Depth of Binary Tree (LC 104) — E — 10 min
3. Diameter of Binary Tree (LC 543) — E — 15 min
4. Balanced Binary Tree (LC 110) — E — 15 min
5. Same Tree (LC 100) — E — 10 min
6. Subtree of Another Tree (LC 572) — E — 20 min
7. Lowest Common Ancestor of BST (LC 235) — M — 20 min
8. Binary Tree Level Order Traversal (LC 102) — M — 25 min
9. Binary Tree Right Side View (LC 199) — M — 25 min
10. Count Good Nodes in Binary Tree (LC 1448) — M — 25 min
11. Validate Binary Search Tree (LC 98) — M — 25 min
12. Kth Smallest Element in BST (LC 230) — M — 25 min
13. Construct Binary Tree from Preorder + Inorder (LC 105) — M — 40 min

Decision gate (Sun May 31): 11–13 → Pass strong → Trees pt 2 (W4). 8–10 → Patchy → Trees pt 2 + retry weakest. <8 → Fail → Repeat Trees pt 1.

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W04 Status Summary — FINAL (scored 2026-06-07)

Pattern: Trees pt 2 — Hard + advanced (7 core + 3 bonus) DSA score: 6/7 on time | 1 FAIL (LC 450 — 36/30 min, hybrid iter/recursive) | bonuses 112, 117, 2196 solved Gate verdict: PASS STRONG → W5 Tries + Heap

Non-DSA: SD Consumer Facing not logged. STAR 0/3 (4th wk) → DROPPED from gate. DMs 0/10 (was mandatory Jun 7) → moved to AUGUST. Mock 0 → deferred. (All per Jun 21 decisions, see re-baseline note.)

Post-W4 deviation (Jun 8–21): no DSA. DDIA Ch1/Ch2 deep notes + /ddia skill build — off critical path.

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Past Week Summaries

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Applications Sent

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Mock Interviews Done

None yet. First mock target W4 (Jun 1–7).