copydata.ai
FounderEngineer

mode: engineer

Hacker mode.

I’m J Maria Sanchez. By day I run UseGlace LLC. After hours I read papers, push code and build things nobody asked for, because they’re interesting. This is that half, logged.

The paper databaseWhat I buildgithub.com/jmariasanchez

contributions, 12 mo
7,515
in private repos
6,647
active days
248/366
longest streak
48 days
busiest day
223 · Jul 31, 2026
last pushed build
mun · Aug 30, 2026
papers logged
5

Activity

Pulled from GitHub at build time. Most of it lands in private company repos, so the public profile looks quieter than this.

GitHub contributions, last 12 months7515 contributions over 248 active days. Busiest day: July 31, 2026, with 223.NovDecJanFebMarAprMayJunJulAugSepOctMonWedFri0 on October 19, 20259 on October 20, 20253 on October 21, 20256 on October 22, 20258 on October 23, 20250 on October 24, 20251 on October 25, 20250 on October 26, 20258 on October 27, 20250 on October 28, 20250 on October 29, 202513 on October 30, 20250 on October 31, 20250 on November 1, 20250 on November 2, 20250 on November 3, 20250 on November 4, 20250 on November 5, 20250 on November 6, 20250 on November 7, 20250 on November 8, 20250 on November 9, 20250 on November 10, 20250 on November 11, 20250 on November 12, 20250 on November 13, 20250 on November 14, 20250 on November 15, 20250 on November 16, 20250 on November 17, 20251 on November 18, 20250 on November 19, 20250 on November 20, 20250 on November 21, 20250 on November 22, 20250 on November 23, 20250 on November 24, 20250 on November 25, 20250 on November 26, 20255 on November 27, 20250 on November 28, 20250 on November 29, 20250 on November 30, 20250 on December 1, 20253 on December 2, 20250 on December 3, 20250 on December 4, 20250 on December 5, 20250 on December 6, 20251 on December 7, 20251 on December 8, 20251 on December 9, 20250 on December 10, 20250 on December 11, 20250 on December 12, 20250 on December 13, 20250 on December 14, 20250 on December 15, 20250 on December 16, 20250 on December 17, 20250 on December 18, 20250 on December 19, 20250 on December 20, 20250 on December 21, 20250 on December 22, 20250 on December 23, 20257 on December 24, 20250 on December 25, 20250 on December 26, 20250 on December 27, 20250 on December 28, 20250 on December 29, 20250 on December 30, 20250 on December 31, 20250 on January 1, 20260 on January 2, 20260 on January 3, 20260 on January 4, 20260 on January 5, 20260 on January 6, 20260 on January 7, 20260 on January 8, 20260 on January 9, 20260 on January 10, 20260 on January 11, 20260 on January 12, 20260 on January 13, 20260 on January 14, 20260 on January 15, 20260 on January 16, 20260 on January 17, 20260 on January 18, 20260 on January 19, 20260 on January 20, 20260 on January 21, 20264 on January 22, 20268 on January 23, 20263 on January 24, 20261 on January 25, 20260 on January 26, 20262 on January 27, 20260 on January 28, 20260 on January 29, 20264 on January 30, 20262 on January 31, 20260 on February 1, 20260 on February 2, 20269 on February 3, 202619 on February 4, 202617 on February 5, 202610 on February 6, 202619 on February 7, 202612 on February 8, 202610 on February 9, 202641 on February 10, 202639 on February 11, 202648 on February 12, 202616 on February 13, 20260 on February 14, 20260 on February 15, 202627 on February 16, 202633 on February 17, 202630 on February 18, 202617 on February 19, 202633 on February 20, 202626 on February 21, 202619 on February 22, 202649 on February 23, 202622 on February 24, 202628 on February 25, 20266 on February 26, 202627 on February 27, 202623 on February 28, 20269 on March 1, 202653 on March 2, 202624 on March 3, 202638 on March 4, 20260 on March 5, 20261 on March 6, 20260 on March 7, 20260 on March 8, 2026108 on March 9, 202611 on March 10, 202632 on March 11, 202620 on March 12, 202624 on March 13, 20266 on March 14, 20266 on March 15, 202615 on March 16, 202622 on March 17, 202632 on March 18, 202616 on March 19, 202627 on March 20, 202617 on March 21, 20263 on March 22, 20265 on March 23, 202666 on March 24, 202629 on March 25, 202636 on March 26, 202626 on March 27, 20263 on March 28, 20266 on March 29, 202614 on March 30, 202618 on March 31, 202631 on April 1, 202627 on April 2, 202625 on April 3, 202610 on April 4, 202632 on April 5, 20264 on April 6, 202620 on April 7, 202616 on April 8, 202638 on April 9, 202630 on April 10, 202628 on April 11, 202623 on April 12, 202648 on April 13, 202653 on April 14, 202636 on April 15, 202651 on April 16, 202655 on April 17, 202644 on April 18, 202628 on April 19, 202621 on April 20, 202618 on April 21, 202639 on April 22, 202657 on April 23, 202628 on April 24, 202622 on April 25, 20260 on April 26, 20260 on April 27, 20264 on April 28, 2026108 on April 29, 2026107 on April 30, 2026117 on May 1, 202622 on May 2, 202683 on May 3, 202691 on May 4, 202628 on May 5, 20260 on May 6, 20260 on May 7, 20260 on May 8, 20269 on May 9, 202645 on May 10, 202615 on May 11, 20262 on May 12, 202645 on May 13, 202614 on May 14, 20269 on May 15, 20265 on May 16, 20262 on May 17, 20260 on May 18, 202671 on May 19, 202637 on May 20, 202624 on May 21, 202636 on May 22, 202611 on May 23, 202631 on May 24, 202637 on May 25, 20260 on May 26, 20260 on May 27, 202655 on May 28, 202617 on May 29, 202616 on May 30, 202653 on May 31, 20260 on June 1, 202643 on June 2, 20260 on June 3, 202610 on June 4, 202635 on June 5, 202695 on June 6, 202642 on June 7, 202618 on June 8, 202620 on June 9, 202627 on June 10, 202621 on June 11, 20266 on June 12, 202640 on June 13, 202672 on June 14, 202619 on June 15, 20260 on June 16, 202640 on June 17, 202628 on June 18, 20267 on June 19, 20268 on June 20, 20262 on June 21, 202697 on June 22, 202695 on June 23, 202626 on June 24, 2026121 on June 25, 20260 on June 26, 20260 on June 27, 202625 on June 28, 202619 on June 29, 202615 on June 30, 202614 on July 1, 20266 on July 2, 202623 on July 3, 202614 on July 4, 202633 on July 5, 202623 on July 6, 20260 on July 7, 20260 on July 8, 202641 on July 9, 202618 on July 10, 202617 on July 11, 20260 on July 12, 20261 on July 13, 20265 on July 14, 20265 on July 15, 20265 on July 16, 20260 on July 17, 202647 on July 18, 202660 on July 19, 2026125 on July 20, 20260 on July 21, 20267 on July 22, 20260 on July 23, 202621 on July 24, 202648 on July 25, 202612 on July 26, 2026190 on July 27, 2026101 on July 28, 20260 on July 29, 20260 on July 30, 2026223 on July 31, 202627 on August 1, 202618 on August 2, 202616 on August 3, 202617 on August 4, 202611 on August 5, 20264 on August 6, 202656 on August 7, 20269 on August 8, 202630 on August 9, 202662 on August 10, 202614 on August 11, 202680 on August 12, 20260 on August 13, 20267 on August 14, 202629 on August 15, 202617 on August 16, 202663 on August 17, 20263 on August 18, 202651 on August 19, 20266 on August 20, 20261 on August 21, 202613 on August 22, 202612 on August 23, 202615 on August 24, 20261 on August 25, 20260 on August 26, 202636 on August 27, 202627 on August 28, 202673 on August 29, 202696 on August 30, 202691 on August 31, 20264 on September 1, 202639 on September 2, 202660 on September 3, 20260 on September 4, 20266 on September 5, 202621 on September 6, 202670 on September 7, 202639 on September 8, 20267 on September 9, 20268 on September 10, 202635 on September 11, 202653 on September 12, 202680 on September 13, 20262 on September 14, 202612 on September 15, 202623 on September 16, 202626 on September 17, 202624 on September 18, 202692 on September 19, 202651 on September 20, 202646 on September 21, 202673 on September 22, 20265 on September 23, 202613 on September 24, 20264 on September 25, 202612 on September 26, 202611 on September 27, 20265 on September 28, 202630 on September 29, 202613 on September 30, 20262 on October 1, 202659 on October 2, 202610 on October 3, 202611 on October 4, 202618 on October 5, 20260 on October 6, 20265 on October 7, 202684 on October 8, 202642 on October 9, 202638 on October 10, 202616 on October 11, 202610 on October 12, 20260 on October 13, 202617 on October 14, 202647 on October 15, 202677 on October 16, 2026107 on October 17, 202637 on October 18, 20260 on October 19, 2026
7,515 contributions in the last year
Contributions per year, since joining in 2021
  1. 20214
  2. 202233
  3. 2023159
  4. 20241,158
  5. 20251,593
  6. 2026 to date7,448
Languages across 31 public repos
  1. TypeScript13
  2. Go7
  3. Python4
  4. Astro2
  5. Swift2
  6. Shell1
  7. C#1

Builds

Side projects with no customer behind them. Small tools, built to understand something or to scratch an itch.

  1. mun

    Private speech-to-text for whole folders, on your own machine.

    Python CLI. Pinned model revisions, a whisper.cpp backend, typed trust labels on every transcript. Diarization researched, not shipped.

    Language
    Python
    Status
    Alpha
    Active
    Aug 2026

  2. kora

    A native macOS music player that only reads folders.

    Swift. No library import, no account. The now-playing view takes its colour from the album art.

    Language
    Swift
    Status
    Working
    Active
    Jun 2026 → Jul 2026

  3. cvx

    A CV kept as a repo that an agent can edit safely.

    Go CLI plus an agent skill. Strict schemas, deterministic rendering, every change auditable in git.

    Language
    Go
    Status
    Working
    Active
    May 2026

  4. jv

    Build and run plain Java without Maven, Gradle or an IDE.

    Bash. Detects the layout, finds the main class, shows the plan, then runs the latest code.

    Language
    Shell
    Status
    Working
    Active
    Oct 2025 → May 2026

  5. altie

    Switch Alacritty themes and fonts from the terminal.

    Go, built on pterm. An early itch, scratched.

    Language
    Go
    Status
    Shelved
    Active
    Jun 2023 → Mar 2024

  6. file-transfer-go

    Send files between two machines over raw TCP.

    Go. A server, a client and a protocol small enough to read in one sitting.

    Language
    Go
    Status
    Done
    Active
    Jun 2022

  7. essential-maths

    A study site for Maths for Computer Science.

    TypeScript. Built to learn the course by explaining it.

    Language
    TypeScript
    Status
    Done
    Active
    Nov 2023 → Mar 2024

Reading

Papers and books I actually read, each tied to the build or course that made me read it. Open the database

  1. 2022
    Robust Speech Recognition via Large-Scale Weak Supervision

    Radford, Kim, Xu, Brockman, McLeavey, Sutskever · arXiv 2212.04356

    → mun
  2. 2020
    pyannote.audio: neural building blocks for speaker diarization

    Bredin, Yin, Coria, Gelly, Korshunov, Lavechin, et al. · ICASSP 2020 · arXiv 1911.01255

    → mun
  3. 2018
    Competitive Programmer's Handbook

    Laaksonen · Book · CSES

    → Competitive programming
  4. 2015
    Deep learning

    LeCun, Bengio, Hinton · Nature 521

    → Research Methods

Notes

Longer writing, finished or not. All notes · RSS

  1. How to take over againEssay