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← The first move on a legacy code base is tests you can trust, before a single line of the code itself is changed.
17 connected korrents · 16 moments from 29 Jun 2023 to 1 Sept 2026.
Everything filed under software quality
software quality
Everything filed under code generation
code generation
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vibe coding
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design
Everything filed under AI and jobs
AI and jobs
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documentation
Everything filed under compilers
compilers
Everything filed under coding agents
coding agents
Everything filed under developer tools
developer tools Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Read this korrent: The first move on a legacy code base is tests you can trust, before a single line of the code itself is changed. The first move on a legacy code base is tests you can trust, before a single line of the code itself is changed. Last stated 3 years ago
29 Jun 2023
GH
George Hotz — holds since 2023-06-29 — tap for who they are
Same subject: He runs tests locally and pushes straight to main, DHH-style; there is no develop branch and main should always be shippable. — tap to centre the map on it He runs tests locally and pushes straight to main, DHH-style; there is no develop branch and main should always be shippable. Last stated 8 months ago
12 Feb 2026
PS
Peter Steinberger — holds since 2026-02-12 — tap for who they are
Same subject: Redefining the engineer's job as building guardrails is not novel — it is the same problem as making a junior engineer effective, which we never solved either. — tap to centre the map on it Redefining the engineer's job as building guardrails is not novel — it is the same problem as making a junior engineer effective, which we never solved either. Last stated 5 months ago
27 May 2026
DR
Dax Raad — holds since 2026-05-27 — tap for who they are
Same subject: Keeping a codebase clean now pays off directly rather than aesthetically, because a coding agent will copy the patterns already in it almost exactly. — tap to centre the map on it Keeping a codebase clean now pays off directly rather than aesthetically, because a coding agent will copy the patterns already in it almost exactly. Last stated 7 months ago
19 Mar 2026
SW
Simon Willison — holds since 2026-03-19 — tap for who they are
Same subject: A language-agnostic conformance suite is the most powerful thing you can hand a coding agent, because the whole instruction becomes: write code until these tests pass. — tap to centre the map on it A language-agnostic conformance suite is the most powerful thing you can hand a coding agent, because the whole instruction becomes: write code until these tests pass. Last stated 7 months ago
19 Mar 2026
SW
Simon Willison — holds since 2026-03-19 — tap for who they are
Same subject: What trips up newcomers to Rust is not the code but the shape of their data. — tap to centre the map on it What trips up newcomers to Rust is not the code but the shape of their data. Last stated 5 months ago
20 May 2026
AR
Alice Ryhl — holds since 2026-05-20 — tap for who they are
Same subject: Nobody has found keeping specs and code in sync worth the upkeep; the code stays the source of truth. — tap to centre the map on it Nobody has found keeping specs and code in sync worth the upkeep; the code stays the source of truth. Last stated 3 months ago
15 Jul 2026
DH
Dex Horthy — holds since 2026-07-15 — tap for who they are
Same subject: A compiler that names every place a change breaks turns refactoring into fixing errors until the compiler stops shouting. — tap to centre the map on it A compiler that names every place a change breaks turns refactoring into fixing errors until the compiler stops shouting. Last stated 5 months ago
20 May 2026
AR
Alice Ryhl — holds since 2026-05-20 — tap for who they are
Same subject: In an agent-written codebase the agent-written tests are equally untrustworthy; manually using the product is the only reliable measure of whether it works. — tap to centre the map on it In an agent-written codebase the agent-written tests are equally untrustworthy; manually using the product is the only reliable measure of whether it works. Last stated 7 months ago
25 Mar 2026
MZ
Mario Zechner — holds since 2026-03-25 — tap for who they are
Same subject: A model can now port essentially any codebase from one programming language to another, work that used to take a team over a year. — tap to centre the map on it A model can now port essentially any codebase from one programming language to another, work that used to take a team over a year. Last stated 3 months ago
27 Jul 2026
BC
Boris Cherny — holds since 2026-07-27 — tap for who they are
Same subject: AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much. — tap to centre the map on it AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much. Last stated 3 months ago
26 Jul 2026
DH
David Heinemeier Hansson — holds since 2026-07-26 — tap for who they are
Same subject: AI code generation's default reward loop works like a slot machine and undermines skill retention. — tap to centre the map on it AI code generation's default reward loop works like a slot machine and undermines skill retention. Last stated 5 months ago
28 May 2026
VB
Vicki Boykis — holds since 2026-05-28 — tap for who they are
Same subject: A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach. — tap to centre the map on it A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach. Last stated 5 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: A good tool raises the floor of what people can build without lowering the ceiling, and almost every tool quietly lowers the ceiling. — tap to centre the map on it A good tool raises the floor of what people can build without lowering the ceiling, and almost every tool quietly lowers the ceiling. Last stated a year ago
18 Sept 2025
TL
Tobias Lütke — holds since 2025-09-18 — tap for who they are
Same subject: A new API framework that ignores how existing apps were historically built undermines its own introduction — tap to centre the map on it A new API framework that ignores how existing apps were historically built undermines its own introduction Last stated 2 months ago
31 Aug 2026
CH
Craig Hockenberry — holds since 2026-08-31 — tap for who they are
Same subject: A boring but non-superficial SaaS app that would have done well five years ago might now get no signups because tens of thousands can easily vibe code it. — tap to centre the map on it A boring but non-superficial SaaS app that would have done well five years ago might now get no signups because tens of thousands can easily vibe code it. Last stated 2 months ago
1 Sept 2026
PL
Pieter Levels — holds since 2026-09-01 — tap for who they are
Same subject: A person at maximum vibe-coding speed has about three productive hours a day, and a company that will not let them stop there is going to break. — tap to centre the map on it A person at maximum vibe-coding speed has about three productive hours a day, and a company that will not let them stop there is going to break. Last stated 7 months ago
11 Mar 2026
SY
Steve Yegge — holds since 2026-03-11 — tap for who they are
Same subject: A screenshot is the fastest, easiest way to build, without having to voice it or type it. — tap to centre the map on it A screenshot is the fastest, easiest way to build, without having to voice it or type it. Last stated 4 months ago
30 Jun 2026
MT
Meng To — holds since 2026-06-30 — tap for who they are
At the centre
The first move on a legacy code base is tests you can trust, before a single line of the code itself is changed.
Holds Read this korrent →
He runs tests locally and pushes straight to main, DHH-style; there is no develop branch and main should always be shippable.
Holds
Redefining the engineer's job as building guardrails is not novel — it is the same problem as making a junior engineer effective, which we never solved either.
Holds
Keeping a codebase clean now pays off directly rather than aesthetically, because a coding agent will copy the patterns already in it almost exactly.
Holds
A language-agnostic conformance suite is the most powerful thing you can hand a coding agent, because the whole instruction becomes: write code until these tests pass.
Holds
What trips up newcomers to Rust is not the code but the shape of their data.
Holds
Nobody has found keeping specs and code in sync worth the upkeep; the code stays the source of truth.
Holds
A compiler that names every place a change breaks turns refactoring into fixing errors until the compiler stops shouting.
Holds
In an agent-written codebase the agent-written tests are equally untrustworthy; manually using the product is the only reliable measure of whether it works.
Holds
A model can now port essentially any codebase from one programming language to another, work that used to take a team over a year.
Holds
AI acceleration threatens 'less software': without the constraint of scarce hours, even 37signals will likely build too much.
Holds
AI code generation's default reward loop works like a slot machine and undermines skill retention.
Holds
A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach.
Holds
A good tool raises the floor of what people can build without lowering the ceiling, and almost every tool quietly lowers the ceiling.
Holds
A new API framework that ignores how existing apps were historically built undermines its own introduction
Holds
A boring but non-superficial SaaS app that would have done well five years ago might now get no signups because tens of thousands can easily vibe code it.
Holds
A person at maximum vibe-coding speed has about three productive hours a day, and a company that will not let them stop there is going to break.
Holds
A screenshot is the fastest, easiest way to build, without having to voice it or type it.
Holds