| 260330-20:49 |
Update 26U log for Mar 30 |
Normalized the documented Mar 30 graph entries in 26U/0.26u-log.md, applied the repeat suffix to 417, updated the single-day count to 7, and refreshed March weekly/month totals |
| 260330-18:30 |
Add stricter rule to preserve user-set 26U dates |
Updated AGENTS.md and .ai/skills/update-ai/SKILL.md so manually added entries keep the user’s day/date exactly; only the question formatting changes before the day-count table and weekly summary table are refreshed |
| 260330-08:40 |
Recheck Mar 28 and Mar 29 per-day counts |
Corrected the March per-day row in 26U/0.26u-log.md so Mar 28 = 0 and Mar 29 = 6; W4 remains 42 because the week total is unchanged |
| 260330-08:38 |
Add stricter 26U day-update index rule |
Updated AGENTS.md and .ai/skills/update-ai/SKILL.md so day/date edits in 26U/0.26u-log.md must update the second table's single-day count first, then recompute the first table's week and month sums |
| 260330-08:32 |
Update 26U log for Mar 29 |
Normalized the remaining documented Mar 29 graph raws in 26U/0.26u-log.md and refreshed March summary counts to match the updated day row |
| 260329-15:18 |
Add missing Islands and Treasure to NC150 |
Added 286. Islands and Treasure in the NC150 graph sequence, normalized the documented Mar 29 graph raws in 26U/0.26u-log.md, and refreshed March summary counts |
| 260327-17:25 |
Add duplicate-count rule in 26U log and push |
Added the durable repeat-count rule in AGENTS.md and .ai/skills/update-ai/SKILL.md, normalized Mar 27 tree raws in 26U/0.26u-log.md, labeled repeated questions with - 2/- 3/..., regenerated both summary tables, and pushed current workspace changes to main |
| 260327-16:33 |
Verify March W4 count in 26U index |
Confirmed Mar W4 = 34 is correct from the per-day table and corrected stale January and February values in the first summary table |
| 260327-16:25 |
Add durable rule for deriving first 26U index table |
Updated AGENTS.md and .ai/skills/update-ai/SKILL.md so the first 26U/0.26u-log.md summary table must be computed from the second per-day table by week and month totals |
| 260327-16:19 |
Count Mar 27 linked-list record in 26U log |
Converted the raw Copy Linked List with Random Pointer Mar 27 entry in 26U/0.26u-log.md into the standard linked bullet; summary counts remain Mar 50, W4 34, Mar 27 10 |
| 260327-16:17 |
Update 26U index sum counts |
Recomputed the monthly cadence totals in 26U/0.26u-log.md from the day-index counts and corrected stale January and February summary values |
| 260327-16:16 |
Add durable rule for 26U day updates |
Added an AGENTS rule that updating any day section in 26U/0.26u-log.md must refresh both top summary tables together |
| 260327-16:14 |
Fix missed Mar 27 26U log entry |
Added the missing 51. N-Queens link in 26U/0.26u-log.md and refreshed March summary counts |
| 260327-16:13 |
Update 26U log so far |
Normalized the documented Mar 27 Tiktok raw entries in 26U/0.26u-log.md and refreshed March summary counts while leaving undocumented N-Queens as raw |
| 260327-11:53 |
Add 90. 子集 II to Tiktok notes |
Added the 90. 子集 II index entry and detail block in 26U/0.Tiktok.md, linked the documented record in 26U/0.26u-log.md, and refreshed March counts |
| 260327-09:17 |
Update 26U log for one Mar 26 record |
Normalized the new Mar 26 raw entry in 26U/0.26u-log.md and refreshed the March summary tables |
| 260326-10:05 |
Update 26U log for raw entries |
Normalized the raw Mar 25 and Mar 26 entries in 26U/0.26u-log.md into linked bullets and refreshed the March summary tables |
| 260325-06:15 |
Update 26U log for new records |
Normalized the new Mar 24 tree entries in 26U/0.26u-log.md into linked bullets and refreshed both March summary tables |
| 260324-10:25 |
Add durable push workflow |
Added push-git skill, mapped push to that workflow in AGENTS, and logged the new durable instruction |
| 260324-10:19 |
Add 26U log rule for daily month table and descending month prepends |
Updated AGENTS and update-ai workflow rules, normalized Mar 24 entries in 26U/0.26u-log.md, and added/refreshed both top summary tables in descending month order |
| 260323-06:47 |
Update 26U log formatting and summary table |
Normalized the recent March entries in 26U/0.26u-log.md into linked log bullets, moved the stray Mar 15 entry into chronological order, and refreshed the month summary table with March counts |
| 260323-06:46 |
Add AGENTS rule for update log handling in 26U log |
Added a durable AGENTS rule that update log means updating 26U/0.26u-log.md, preserving manually prepended entries, normalizing format, and refreshing the top summary table |
| 260323-06:45 |
Move weekly additions table from AGENTS.md into 26U log file beginning |
Confirmed the table still lived in AGENTS.md, added it to the top of 26U/0.26u-log.md, and kept the rest of the log intact |
| 260317-06:38 |
Fill unanswered placeholder details in 26U/0.nc150.md without copying from blind75.md |
Replaced all remaining placeholder NC150 detail blocks with generated interview-style solutions and canonical signatures; verified zero solve(*args, **kwargs) stubs remain |
| 260317-06:13 |
Remove all neetcode150 lines from 26U/0.nc150.md and strip leading - from following non-empty lines |
Removed all neetcode150 tags from 26U/0.nc150.md and normalized the next placeholder description lines by removing leading list markers |
| 260317-06:06 |
Sync 26U/0.nc150.md detail formatting, remove neetcode tags, and fill unanswered NC150 solutions |
Attempted bulk rewrite, detected block-misalignment risk, and restored 26U/0.nc150.md to committed state instead of leaving a corrupted file |
| 260315-22:19 |
Verify whether all Blind75 solutions (including multi-approach ones) were copied into 0.nc150.md |
Verified full Blind75 coverage in NC150: 75/75 anchors present and all 14 multi-approach blocks matched |
| 260315-17:14 |
Make 26U/0.nc150.md index exactly like 26U/0.blind75.md |
Rewrote the index to blind75 style bullet entries with one-line descriptions under each category while preserving NC150 question set |
| 260315-16:40 |
Fix jammed index formatting in 26U/0.nc150.md while keeping one-line questions |
Normalized category index spacing so each question remains one line with readable separation between entries |
| 260315-16:32 |
Make each index question one line in 26U/0.nc150.md |
Removed per-question index description lines so each question is exactly one line and each next question starts on a new line |
| 260315-16:13 |
Remove every neetcode150 tag from each index question in 26U/0.nc150.md |
Removed standalone neetcode150 tag lines from the index section of 26U/0.nc150.md (kept solution tags untouched) |
| 260315-09:49 |
Push all current workspace changes |
Staged all changes, committed with a concise message, and pushed to main on remote lc |
| 260315-01:41 |
Convert 26U/nc150.md to PDF in repo root |
Generated nc150.pdf at repo root via markdown->HTML->Playwright export and cleaned temp artifacts |
| 260315-01:34 |
Add hyperlinks for quick-reference plan rows (1,1,1,2,2,4) to detailed plan sections below |
Linked all 6 quick-reference plan rows in google_l4_prep_plans.md to #plan-1..#plan-6 and added matching section anchors |
| 260315-00:46 |
Diagnose Codex chat file links opening in browser and adjust config guidance |
Verified config already uses IDE-local file links (open_local_files_in_ide=true, file_links="local"); root issue is response link format, so use IDE path refs like 26U/nc150.md:8 |
| 260315-00:27 |
Update 26U/nc150.md so each index question link jumps to its detail section below |
Rewrote category index links to local #lc-XXXX anchors and inserted matching <a id="lc-XXXX"></a> anchors above each solution header |
| 260315-04:51 |
Create 26U/nc150.md with NeetCode 150 index/order and solutions, reusing Blind75 answers when overlapping |
Added 26U/nc150.md with 150-question category index in NeetCode order and a full solutions section seeded from Blind75 overlaps plus placeholders for added NC150 entries |
| 260307-07:22 |
Deepen /sde modules with richer per-topic guidance on problem fit, implementations, tools, and tradeoffs |
Expanded foundational SDE modules with interview-focused depth: use-cases, alternatives, component impacts, framework fit, and decision tradeoffs |
| 260307-06:26 |
Reorder and deepen /sde learning scope: FR/NFR → estimation → architecture → API → data model → deep dives |
Rebuilt sde/ into a 15-step interview progression, added new foundational modules, and reorganized existing deep-dive files without losing coverage |
| 260306-14:45 |
Expand sd/ax solutions from template-level to full Alex Xu-style deep coverage |
Rewrote all 22 sd/ax/solutions/* with detailed approach flow, APIs, mini-algorithms, failure handling, scaling, DR, security, ops, and interview scripts |
| 260306-06:31 |
Create sd/ax with Alex Xu system design questions and separate deep solution files |
Added sd/ax index + 22 interview-ready solution packets, linked from sd/questions.md, and logged this chat entry |
| 260305-23:48 |
Commit and push current branch to main |
Staged all tracked changes, created commit a46fed2 with workspace + SD scaffolding updates, then pushed HEAD -> main via remote lc (since origin is not configured locally) |
| 260305-22:46 |
Rename 02.social-media, reorder/rename question files by ranked order, and simplify questions index to hyperlink names only |
Renamed social folder to dashed form, renumbered all 80 question files per type based on ranking order (with updated in-file IDs), and rewrote sd/questions.md to compact linked entries like 0101.rate limiter without rank/id table columns |
| 260305-22:41 |
Reorganize SD question files into typed folders and rank each type by interview relevance/likelihood |
Moved all 80 SD question files into type folders like sd/01.core/ and sd/02.social media/, then rewrote sd/questions.md with per-type ranked tables ordered by likelihood then relevance |
| 260305-22:11 |
Reorganize instructions into AGENTS, create .ai agents/skills, scaffold SD/SDE docs, and generate top 80 system design questions (no solutions) |
Moved instruction system to AGENTS.md, created agent and skill hierarchy including p-swe and update-ai, generated sd/questions.md and 80 per-question files, added sd/flow.md, and created sde/ knowledge graph index/modules |