Ariel Caplan

Kosher coder | speaker | meetup organizer | Treadmill desk enthusiast | @ShopifyEng | @DevEmpathy book club | @FlatironSchool ❤️ | grep "meaning" | wc -l

[Ariel Caplan @amcaplan]

Hi, friends! 👋

I recently donated each day’s salary to a different Israeli charity, for one month. I slowly built a list of 31 charities to which I’d personally be willing to donate a full day’s salary, and posted a short profile of each.

As a public service, I’m resurfacing the list here in 1 post, grouped by category. I hope you find it useful.

(Note that some charities appear multiple times, as they fall into multiple categories.)

Mega Funds

JGive https://t.co/PKDSbDcDIF
Channel 12 https://t.co/LopcjfsCZe

Medical

United Hatzalah https://t.co/ZkmMBuZXRd
MDA (Israel’s Red Cross) https://t.co/zJZM3KPjmb
Ezer Mizion https://t.co/Qnl7OULmON
Ezra Lamarpe https://t.co/LiqJRoohnZ
Hibuk Rishon https://t.co/0pUUR6RRRJ
ZAKA https://t.co/iVNQvcoIok
Yad Sarah https://t.co/sgk6ipPG86
Haverim LeRefuah (medicine rescue) https://t.co/o3iWYJRWOm

Mental Health

ERAN (mental health helpline) https://t.co/MXyxFLv8Ol
NATAL (trauma center) https://t.co/ALeW9R6AFI
OneFamily (terror victims) https://t.co/oBBbnTUYGg
Koby Mandell Foundation (terror victims) https://t.co/fqLoFq8tBw

Rescue/Recycling (high-efficiency charities)

Leket Yisrael (food) https://t.co/4YfIbqKVen
Shinua Hevrati (furniture, appliances) https://t.co/XYxH4Xx17h
Haverim LeRefuah (medicine) https://t.co/o3iWYJRWOm

Babies

Tinokot Shel HaChayim https://t.co/vcmkB1s4tU
Hibuk Rishon https://t.co/0pUUR6RRRJ

Disability / Special Needs

Shalva https://t.co/nzWxXvkCIH
Beit Issie Shapiro https://t.co/tsaI53rnEz

Terror victims

OneFamily https://t.co/oBBbnTUYGg
Koby Mandell Foundation https://t.co/fqLoFq8tBw

Food

Rav Rimon fund https://t.co/LopcjfsCZe
Leket Yisrael (food rescue) https://t.co/4YfIbqKVen
Tinokot Shel HaChayim (babies) https://t.co/vcmkB1s4tU
Lichyot Bekavod (elderly) https://t.co/tf0ytWqoV0
Latet https://t.co/oMbLf1rwoL
Merkaz HaChessed Sderot https://t.co/bV0Jkj0epX

Soldiers

Lev LaChayal https://t.co/J6slTaAW6e
Yashar LaChayal https://t.co/kjCvOzKIr4
Rav Rimon fund https://t.co/LopcjfsCZe
Tzitzit 4 IDF https://t.co/gQYDPi0rds

Religiously-oriented causes

Tzitzit 4 IDF https://t.co/gQYDPi0rds
Shaalvim & Sderot (hesder yeshivas) https://t.co/LZZFFTnnMv

Uncategorized

Paamonim (financial education and support) https://t.co/FQ0IUEJwrl
Lev Echad (volunteer network) https://t.co/2W3JPFfad8
Shurat HaDin (fighting terror in court) https://t.co/fTWZp5hRiq
Yedidim Roadside Assistance https://t.co/KDZe4NAiae

Original 🧵 here:

https://t.co/SuFt9pJUw9

[Ariel Caplan @amcaplan]

הטענה שהממשלה רודפת את החרדים היא כל כך הזויה. לפי המספרים:

75% מהמשתמטים מהצבא הם חרדים.

מתוך כל 232 כתבי האישום שהוגשו בשנת 2026 נגד משתמטים, פחות מ7% היו נגד חרדים.

רדיפה ממש

https://t.co/zuBPQONCfb

[Nick Wesselman 💙💛 @nick_wesselman]

Shopify CLI 4.0 is here y'all!!

Be excited, but not worried. The breaking changes are no big deal.

https://t.co/lBuvsODeQD

[Ariel Caplan @amcaplan]

@Grummz Around for months?! It was released on Nov 24!

2 weeks ago it had been out for 3 weeks. Sounds like a reasonable evaluation period.

[Ariel Caplan @amcaplan]

In 2021, we asked: Do we need people in offices?

In 2026, 5 years later, we will start asking: Do we need people?

[Ariel Caplan @amcaplan]

@shevereshtus I will also add my voice to those who have said that "babysitting" is the incorrect term for watching your own children.

You are 100% responsible for your kids.
Your wife is 100% responsible for your kids.

How you divvy up the work in practice is between the two of you.

[Ariel Caplan @amcaplan]

@shevereshtus I really appreciate this post, and often I struggle with the same. I know intellectually my kids need me and thrive on my presence, but honestly playing war, or feeding someone who doesn't want to eat what I'm serving, feels like a waste of everything I've built myself to be.

[Ariel Caplan @amcaplan]

The @tryramp year in review was surprisingly adorable. But it was pretty foolish to calculate it before the end of the year. They should know how many expenses are submitted at the very end of the year to meet deadlines!

[Ariel Caplan @amcaplan]

This feels right. You can see the bets being placed by the companies being acquired.

Cursor is betting on a future where we code like we did 5 years ago, but faster.

Anthropic is betting on a future where we evolve beyond that. Where we build systems, not file collections.

[Ben Scharfstein @benscharfstein]

Cursor x Graphite
Cognition x Windsurf
Google x Windsurf (team)
Anthropic x Bun

The consolidation is happening, the players are being finalized and the game is being played at the highest level

[Ariel Caplan @amcaplan]

@shevereshtus Knowledge of the basics of generations/history of tannaim and amoraim is similarly transformative for studying gemara, and gives an appreciation for the greatness of these individuals you'd miss otherwise. How many yeshiva students know any of it?

[Ariel Caplan @amcaplan]

@levelsio This is... exactly what happened when GPS became a thing. When it funneled you to a better route, it did the same thing for thousands of others, and ultimately it turned random side streets into traffic nightmares.

Those who guide the herd hold great power.

[Ariel Caplan @amcaplan]

Cloudflare is down, and all the AI services with it.

Some might decry this as a warning that we can't rely on AI for everything.

I celebrate that we have found the SPoF for AI. The plug to pull when it goes rogue and we need to shut it down globally.

The plug is Cloudflare.

[Ariel Caplan @amcaplan]

@shevereshtus If anything, the major outcome of the study is to show how similar YCT/Maharat are to avowedly non-Orthodox institutions. A more interesting study would compare JTS, YCT, RIETS, Chabad, and Lakewood. The variety of answers on some of the questions would be incredibly interesting.

[Ariel Caplan @amcaplan]

@shevereshtus The "Modern Orthodox" contingent interviewed consisted exclusively of YCT and Yeshivat Maharat, plus those who studied in non-Orthodox institutions and decided to call themselves Orthodox rabbis later.

I know you know this @shevereshtus, just posting for others to be aware.

[Ariel Caplan @amcaplan]

@piersmorgan This is like spending 10 minutes in the former CHAZ in Seattle and concluding America is overwhelmingly socialist

[Ariel Caplan @amcaplan]

עכשיו מתברר אפילו יותר שהמחאות לשחרור החטופים זה בדיוק מה שהחמאס רצו. המחאות *העלו* את המחיר, *מנעו* עיסקה, ו*האריכו* את השבי והמלחמה, חד משמעית.

https://t.co/Xks4K3mJoR

[Ariel Caplan @amcaplan]

Claude Code NCSY
🤝

[Ariel Caplan @amcaplan]

It finally happened. Completed the Arabic course, lately doing Russian.

Good on Duolingo for making it addicting to form a habit.

[Ariel Caplan @amcaplan]

@_catwu What does it mean to clear tool calls - are they completely eliminated, or summarized?

Often a tool call (e.g. Bash(run-my-tests)) will have a wall of output that could be summarized effectively as "187 succeeded, 3 failed, here are the failures..."

[Jake Ward @jakezward]

The future of SEO is happening right now.

It’s called LLM SEO (or LEO).

And it’s quietly driving 100,000s of users.

Here’s your chance to get ahead: