ppll

Boris Cherny

Creator of Claude Code at Anthropic.

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What they believe

The bold line is korrents’ wording; the quote is theirs. These 2: what they wrote before what they said aloud, one per source, newest first.

All 35 beliefs, on korrents

Everything, newest first — across every channel.

Sources

15 October

Boris Chernyx.com
  • Anthropicprompt injection

8 October

Boris Chernyx.com

7 October

Boris Chernyx.com

6 October

Boris Chernyx.com
  • Anthropic

  • acquired.fm

    Anthropic

1 October

Boris Chernyx.com
  • Anthropic

28 September

Boris Chernyx.com
  • Anthropic

26 September

Boris Chernyx.com

25 September

Boris Chernyx.com
  • claude.com

    AnthropicJavaScript

24 September

Boris Chernyx.com

23 September

Boris Chernyx.com

22 September

Boris Chernyx.com
Boris ChernyRecommends
  • Usestheir ownrcmnd.app

    Opus

    Their words

    I used Opus 5.5 to formally verify the Claude Agent SDK using Lean. A couple short prompts = 16 PRs fixing various bugs and race conditions.

    x.com

  • Usesrcmnd.app

    Lean

    Their words

    I used Opus 5.5 to formally verify the Claude Agent SDK using Lean. A couple short prompts = 16 PRs fixing various bugs and race conditions.

    x.com

  • Usesrcmnd.app

    TLA+

    Their words

    TLA+ also works well. I sometimes combine Lean and TLA+ to look for issues around data flow, concurrency, and state mgmt.

    x.com

20 September

19 September

Boris ChernyKorrents

From one piece I am often wrong — Boris Cherny's Blog 2 beliefs · borischerny.com

17 September

Boris Chernyx.com
  • Anthropic

Boris ChernyRecommends
  • Recommendstheir ownrcmnd.app

    Projects

    Their words

    Projects are how I write a lot of my code these days. Really excited for everyone to try the new experience! Rolling out now

    x.com

16 September

Boris ChernyRecommends
  • Lovedtheir ownrcmnd.app

    Claude

    Their words

    Simple enough for everyone to access Claude's full capabilities. I've been using this experience every day for the last few weeks, and it feels awesome. Simpler, faster, and more powerful.

    x.com

14 September

Boris ChernyRecommends
  • Likedrcmnd.app

    Claude

    Their words

    Super cool way to use Claude https://www.vals.ai/blogs/fable-solves-cyphral-distich

    x.com

11 September

7 September

1 September

Boris ChernyRecommends
  • Lovedtheir ownrcmnd.app

    Fable 5.1

    Their words

    This model is a pleasure to work with, and I've been using it for everything.

    x.com

7 August

Boris ChernyRecommends
  • Usestheir ownrcmnd.app

    Auto mode

    Their words

    The team and I use Auto mode exclusively, and have been for many months. I couldn't imagine going back to permission prompts! Really excited to get this out to everyone.

    x.com

27 July

Boris ChernyKorrents

From one piece Boris Cherny: We Cut 80% of Claude Code's Prompt 13 beliefs · youtube.com

+ 10 more

24 July

Boris ChernyRecommends
  • Likedtheir ownrcmnd.app

    Claude Opus 5

    Their words

    Opus 5 is a great model for coding, data analysis, design, biology, knowledge work.

    x.com

8 July

2 July

Boris ChernyRecommends
  • Lovedtheir ownrcmnd.app

    Claude Code Artifacts

    Their words

    Artifacts in Claude Code have been life changing. Excited to expand to Pro and Max!

    x.com

12 June 2025

4 June 2025

8 May 2025

12 December 2024

19 June 2024

2 June 2024

10 December 2023

Boris ChernyRecommends
  • Usestheir ownrcmnd.app

    Workplace

    Their words

    Instead of meetings, I used Workplace posts (Meta’s internal version of Facebook Group posts) to share thoughts, start discussions, and make announcements.

    borischerny.com

7 September 2022

Boris ChernySite
  • Time and Timing

17 January 2022

13 March 2021

24 December 2019

8 September 2019

Boris ChernySite
  • On Contagion

26 May 2019

Boris ChernySite
  • 13 Tips for Writing a Technical Book

    TypeScript

10 August 2018

Boris ChernySite
  • On Derived State

The whole feed →

Beliefs

What is a korrent?

A korrent is a belief a person has stated in their own words: one sentence stating the claim, backed by a quote and a source, kept at korrents.com.

Under a name here, the quoted block is what they actually said. The korrent beneath it is the claim those words support, in korrents' wording — tap it to see the record, its source, and who else holds it.

Nobody here wrote their own korrents. They are compiled from public statements, and a person can change their mind, which is recorded too.

Recommends rcmnd

  • rcmnd What they recommend 13 things — each backed by an exact quote.

    Compiled by rcmnd.app, not by them: the quotes are theirs, and each links to the post it was copied from.

    Recent

    • Uses TLA+
      TLA+ also works well. I sometimes combine Lean and TLA+ to look for issues around data flow, concurrency, and state mgmt.

      x.com 22 Sept 2026

      What others say about TLA+ →

    • Uses Lean
      I used Opus 5.5 to formally verify the Claude Agent SDK using Lean. A couple short prompts = 16 PRs fixing various bugs and race conditions.

      x.com 22 Sept 2026

      What others say about Lean →

    • Uses Opus
      I used Opus 5.5 to formally verify the Claude Agent SDK using Lean. A couple short prompts = 16 PRs fixing various bugs and race conditions.

      x.com 22 Sept 2026

      their own

      What others say about Opus →

    Show 10 more

    All 13 recommendations →

Where they publish

About the English under a post

Some people here publish in a language other than English. Where they do, this site shows a machine translation beneath the post, in this typeface — the site's own, not theirs.

The post itself is never changed, moved or hidden: what is set in the serif above is exactly what the person published, and it is what to quote them on. A translation can be wrong in ways that matter, especially about tone.

Only the post's own words are translated. A quoted post, a linked article and a belief on korrents.com are left in their original language.