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#80 — Top 94.5%

exuanbo

Xuanbo Cheng

B

Solid engineer

Overall

0.0

/ 100

01 · Roasts

The 32-Week Sabbatical

Your heatmap is a ghost town for weeks 1–32 — literally 30+ consecutive weeks of zeroes. assembler-simulator somehow survived despite its author going into hibernation for half the year.

60% Graveyard Operator

staleRepoRatio = 0.60 means 3 out of every 5 of your repos haven't been touched in 2+ years. That's not a portfolio, that's a digital cemetery with two living exhibits.

Stars Without Docs

cs61b-sp21 has 200 stars and zero documentation — no README, no license, no tests. Congrats on accidentally becoming a Berkeley crib-sheet supply chain.

65 Commits, 58 Repos

You maintain 58 public repos on 65 commits per year. That's barely more than one commit per repo annually. Breadth is admirable; follow-through is a different conversation.

PRs? Heard Of 'Em

2 external PRs in a whole year. You built a 508-star CPU simulator from scratch but apparently the open-source world doesn't need your help anywhere else.

Built using

Zoral

Shadows one worker for a week, then takes over their job with zero extra setup. Behaves exactly like the original.

zoral.ai

02 · Category breakdown

  • Impact
    25% weight
    73B
  • Consistency
    20% weight
    55D
  • Quality
    20% weight
    77B
  • Depth
    15% weight
    70B
  • Breadth
    10% weight
    65C
  • Community
    10% weight
    40D

03 · Stats

365-day commit heatmap

55 active days

Less
More

Language distribution

7 langs
  • TypeScript57%
  • JavaScript17%
  • Python17%
  • Assembly4%
  • C2%
  • HTML1%
  • Other2%

04 · Numbers

Owned repos

non-fork

45

Commits

last 12 months

65

Followers

100

Joined GitHub

May 2017

05 · Top repos

06 · Timeline

  1. May 8, 2017
    Joined GitHub
  2. Nov 12, 2020
    Created assembler-simulator — The Assembler Simulator is an 8-bit CPU simulation tool that utilizes the "Samphire" sms32v50 Microprocessor Simulator instruction set.
  3. Mar 1, 2021
    Created cs61b-sp21 — CS 61B, Spring 2021
  4. Oct 9, 2024
    Created di-wise — 🧙‍♀️ Lightweight and flexible dependency injection library for JavaScript and TypeScript, w/wo ECMAScript decorators.
  5. Nov 14, 2025
    Most recent push to assembler-simulator

07 · Compare

github.com/
exuanbo · 6dmedian coder

08 · Rubric

How this score was produced

Overall = Σ (category × weight) + gentle top-end curve

CategoryWeightScoreContrib.
Raw total65.7
Top-end curve+5.8
Final overall71.4

Tier thresholds

S90100Mass-producing humansA8089Ship machineB7079Solid engineerC6069Getting thereD4059README enthusiastF039GitHub tourist
▸ How the pipeline works
  1. 01Scrape.Pull every non-fork repo pushed in the last 90 days, plus your contribution calendar, followers, and language byte counts — straight from GitHub's REST & GraphQL APIs.
  2. 02Triage.A small model reads every repo's file tree + README and picks the 20 files per repo that actually reveal how you code.
  3. 03Grade each repo. All repos run in parallel through a fast scoring model that reads the picked files and rates each one independently on Impact, Quality, and Depth — with evidence citations.
  4. 04Aggregate. A larger reasoning model combines the per-repo scores with server-computed stats (heatmap, commit cadence, language entropy, follower count) to produce the 6-dimension profile score + roasts.
  5. 05Correct.Deterministic server-side checks enforce anchor-scale floors (e.g. a profile with 2,000+ public commits can't score 30 Consistency) and recompute the final verdict.

~90 seconds per profile, ~$0.25 in compute. Total of ~240 files read across your top-12 repos. One rating per GitHub account per day.

▸ Data sources & caveats
  • Heatmap & commit totals: GitHub GraphQL contributionsCollection — covers the last 365 days, includes private repos when the user has opted in (default).
  • Language %: byte totals across the top 30 owned non-fork repos.
  • Curve: a small upward nudge centered on raw score ≈ 70, capping at 100. Prevents specialists from being unfairly penalised for narrow breadth.
  • Anchor corrections: when server-measured signals (e.g. privateWorkLikely, multiRepoVolume, follower count) mandate a minimum category score, the aggregation step enforces it. These are signal-conditional, not identity-based floors.
exuanbo · 71.4/100 — Rate My GitHub