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Three OpenAI safety researchers were fired after security officers
discov=
ered Signal chats with disappearing messages turned on on
their=C2=A0= =E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2= =A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C= =C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80= =8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0= =E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2= =A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0= =E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2= =A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C= =C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80= =8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0= =E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=A0=E2=80=8C=C2=
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=09=09TLDR =
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TLDR 2026-10-23
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=F0=9F=93=B1=20
BIG TECH & STARTUPS
THE SIGNAL CHA=
TS THAT COST OPENAI RESEARCHERS THEIR JOBS (13 MINUTE
READ) [8]=20
Th=
ree OpenAI safety researchers were fired after security officers
discover=
ed Signal chats with disappearing messages turned on on their
personal de=
vices. OpenAI claimed the researchers were fired for
violating clear poli=
cies for handling sensitive information and not
for raising safety concer=
ns or speaking out. The researchers had spent
recent months at the compan=
y pushing for more industry collaboration
on safety. They claim their fir=
ings will serve as an excuse for OpenAI
to close a channel to independent=
third-party insight.=20
AMAZON'S NEW TABLET IS A CREDIBLE IPAD RIVAL F=
OR MUCH LESS MONEY (11
MINUTE READ) [9]=20
The Alexa Tablet lineup of=
fers a more open approach to software than
Amazon's previous Fire brand t=
hat lets consumers use the devices like
any other Android tablet. Users c=
an download apps from the Google Play
Store and access popular services l=
ike Gmail and YouTube. Amazon
previously restricted access to its own app=
marketplace. The 12-inch
Alexa Tablet Pro is well constructed and has a =
smooth 12-hertz
display, making it competitive with Apple's iPads.=20
=
=F0=9F=9A=80=20
SCIENCE & FUTURISTIC TECHNOLOGY
SPACEX IN TALKS TO=
ACCESS 80,000 CELL SITES FOR NEW NETWORK (4 MINUTE
READ) [10]=20
Spa=
ceX is in talks with Crown Castle Inc., one of the largest owners
of cell=
ular towers in the US, as part of its plans to secure a minimum
of 80,000=
cell sites across the country. Crown Castle is likely also
in talks with=
Amazon and other satellite-based telecom providers
regarding leasing dea=
ls. Elon Musk has openly discussed creating a
standalone wireless carrier=
from scratch. SpaceX recently acquired
low-band spectrum and has receive=
d approval to launch 15,000
satellites to provide mobile service directly=
to phones.=20
MODERNA AND MERCK SAY THEIR MRNA CANCER VACCINE CUT DEAT=
H, RECURRENCE
BY 42% (3 MINUTE READ) [11]=20
Moderna and Merck's pers=
onalized mRNA vaccines against melanoma
demonstrate how mRNA technology h=
as the potential to fundamentally
challenge how cancer is treated. The va=
ccine's success offers a new
paradigm for cancer therapies. The companies=
are already engaging with
regulatory authorities to get the vaccine appr=
oved.=20
=F0=9F=92=BB=20
PROGRAMMING, DESIGN & DATA SCIENCE
YOU=
R PROMPTS DESERVE MORE CONTEXT THAN YOU'LL EVER TYPE (SPONSOR)
[12]=20
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w [13] lets you say it instead: explain the bug and the edge cases
out lo=
ud, and it types clean, formatted text in any app. 4x faster
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[14]=20
LLM=
S ARE MAKING FORMAL SOFTWARE VERIFICATION FEASIBLE AT A MUCH
LARGER SCALE=
(23 MINUTE READ) [15]=20
We need ways to prove that code is free from =
bugs. Formal software
verification, which could provide this guarantee, h=
as always required
years of expert effort, but LLMs can now produce forma=
l proofs at
large scale. This enables new software development workflows =
that
include proven security guarantees. Formal verification will likely=
become an essential part of secure software development as model
capab=
ilities continue to improve.=20
ANTHROPIC BUILDS ITS OWN SOURCE CONTROL=
SYSTEM (15 MINUTE READ) [16]=20
Anthropic employs around 3,500 staff, =
but its coding output is closer
to that of a company with 35,000 to 70,00=
0 staff. Big tech companies
like Google and Meta moved off Git a long tim=
e ago because it did not
scale for them. Both built their own custom solu=
tions, just like
Anthropic did with Scion. This post provides some detail=
s about how
Anthropic's custom source control system works.=20
=
=F0=9F=8E=81=20
MISCELLANEOUS
=E2=80=98IF ANYTHING HAPPENS TO THIS=
GUY =E2=80=A6 EVERYONE IS SCREWED' (13
MINUTE READ) [17]=20
Ond=
=C5=99ej Sur=C3=BD is one of the volunteers who helps maintain and
automa=
te patches for PHP. He alone is responsible for most of the
world's distr=
ibution of PHP. His work, along with just a handful of
others, has allowe=
d countless websites and organizations to fix the
recently revealed PHP v=
ulnerabilities quickly. He's become arguably
the unsung hero of the entir=
e internet, despite the fact that the only
compensation he receives for h=
is work is from donations. This article
features an interview with Sur=
=C3=BD where he discusses the unfolding
AI-cybersecurity crisis, how the =
internet's infrastructure is
maintained by small crews of volunteers, and=
how it feels to save the
web.=20
AN ARTIST'S TAKE ON AI IN MATH (9 M=
INUTE READ) [18]=20
Mathematics seems to be a field where the outputs a=
re celebrated less
as examples of subjective expression and more as advan=
cements in
knowledge and understanding. A mathematician's work may be inf=
ormed by
their experience, but that's not what gives their contributions =
value.
Mathematical knowledge remains objectively true whether it is obse=
rved
by humans or sea sponges or computer programs.=20
=E2=9A=A1=20
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SOFTWARE IS SLOW BECAUSE OF BAD DESIGN, NOT SLOW LANGUAGES (7 MINUTE
REA=
D) [20]=20
Most programs can't be meaningfully sped up by rewriting the=
m in C or
Rust.=20
JPEG XL, WELCOME TO THE WEB! (5 MINUTE READ) [21] =
JPEG XL is the end-game universal image format because it has
exce=
llent compression efficiency, a universal feature set, wide color
depth, =
gamut, and native HDR, lossless JPEG transcoding, high-speed
parallel sof=
tware encoding and decoding, and an open-source,
permissive license.=20
=
WARHOUND RAISES $200M TO ENGINEER WAR DOGS AND ARM THEM WITH ANDURIL
=
GEAR (4 MINUTE READ) [22]=20
The US has become increasingly reliant on =
foreign nations for dogs
that play an important role in the US military a=
nd law enforcement.=20
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SUPERVISORY ENGINEERING WORK (17 MINUTE READ) [25]=20
Supervisory engin=
eering work is a different job from software
engineering and so requires =
a different system around it.=20
FINANCE IN THE INTELLIGENCE ERA (15 MI=
NUTE READ) [26]=20
Finance companies in the AI era need to be built aro=
und continuous
decisions, portable assets, and delegated distribution. =
I'M NOT DOING 996 (18 MINUTE READ) [27]=20
We are the ones who g=
et to decide what to do with all of the
productivity that AI creates.=20
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<div style=3D"display: none; max-height: 0px; overflow: hidden;">Three Open=
AI safety researchers were fired after security officers discovered Signal = chats with disappearing messages turned on on their =E2=80=8C =E2= =80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2= =80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2= =80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2= =80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2= =80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C &nb= sp;=E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C&nb= sp;=E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C&nb= sp;=E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C&nb= sp;=E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C&nb= sp;=E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C =E2=80=8C&nb= sp;=E2=80=8C </div>
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<h1><strong>TLDR <span id=3D"date">2026-10-23</span></strong></h1>
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<strong>Meeting notes you don't hav=
e to clean up, plus up to 12 months of Wispr Flow free (Sponsor)</strong>
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<h1><strong>Big Tech & Startups</strong></h1>
</div>
</div>
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<table style=3D"table-layout: fixed; width: 100%;" width=3D"100%"><tbody><t= r><td style=3D"padding:0;border-collapse:collapse;border-spacing:0;margin:0=
;" valign=3D"top">
<table align=3D"center" border=3D"0" cellpadding=3D"0" cellspacing=3D"0" wi= dth=3D"100%"><tbody><tr><td class=3D"container" style=3D"padding: 15px 15px=
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<span>
<strong>The Signal Chats That Cost = OpenAI Researchers Their Jobs (13 minute read)</strong>
</span>
<span style=3D"font-family: "Helvetica Neue", Helvetica, Arial, V= erdana, sans-serif;">
Three OpenAI safety researchers were fi= red after security officers discovered Signal chats with disappearing messa= ges turned on on their personal devices. OpenAI claimed the researchers wer=
e fired for violating clear policies for handling sensitive information and=
not for raising safety concerns or speaking out. The researchers had spent=
recent months at the company pushing for more industry collaboration on sa= fety. They claim their firings will serve as an excuse for OpenAI to close =
a channel to independent third-party insight.
</span>
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<span>
<strong>Amazon's New Tablet Is a Cr= edible iPad Rival for Much Less Money (11 minute read)</strong>
</span>
<span style=3D"font-family: "Helvetica Neue", Helvetica, Arial, V= erdana, sans-serif;">
The Alexa Tablet lineup offers a more o= pen approach to software than Amazon's previous Fire brand that lets consum= ers use the devices like any other Android tablet. Users can download apps = from the Google Play Store and access popular services like Gmail and YouTu= be. Amazon previously restricted access to its own app marketplace. The 12-= inch Alexa Tablet Pro is well constructed and has a smooth 12-hertz display=
, making it competitive with Apple's iPads.
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<h1><strong>Science & Futuristic Technology</strong></h1>
</div>
</div>
</td></tr></tbody></table>
<table style=3D"table-layout: fixed; width: 100%;" width=3D"100%"><tbody><t= r><td style=3D"padding:0;border-collapse:collapse;border-spacing:0;margin:0=
;" valign=3D"top">
<table align=3D"center" border=3D"0" cellpadding=3D"0" cellspacing=3D"0" wi= dth=3D"100%"><tbody><tr><td class=3D"container" style=3D"padding: 15px 15px=
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<span>
<strong>SpaceX in Talks to Access 8= 0,000 Cell Sites for New Network (4 minute read)</strong>
</span>
<span style=3D"font-family: "Helvetica Neue", Helvetica, Arial, V= erdana, sans-serif;">
SpaceX is in talks with Crown Castle In= c., one of the largest owners of cellular towers in the US, as part of its = plans to secure a minimum of 80,000 cell sites across the country. Crown Ca= stle is likely also in talks with Amazon and other satellite-based telecom = providers regarding leasing deals. Elon Musk has openly discussed creating =
a standalone wireless carrier from scratch. SpaceX recently acquired low-ba=
nd spectrum and has received approval to launch 15,000 satellites to provid=
e mobile service directly to phones.
</span>
</span>
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<div class=3D"text-block">
<span>
<a href=3D"
https://tracking.tldrnewsletter.= com/CL0/https:%2F%2Farstechnica.com%2Fhealth%2F2026%2F10%2Fpersonalized-mrn= a-cancer-vaccine-cut-melanoma-death-recurrence-by-42%2F%3Futm_source=3Dtldr= newsletter/1/010001a16852d4e4-af08a25e-01dc-4454-87c5-436adc7b364a-000000/o= 8XCLFcGDKdBmmQq6h4oFV08SoueJBLgrRkYC4NAcSE=3D452">
<span>
<strong>Moderna and Merck say their=
mRNA cancer vaccine cut death, recurrence by 42% (3 minute read)</strong>
</span>
<span style=3D"font-family: "Helvetica Neue", Helvetica, Arial, V= erdana, sans-serif;">
Moderna and Merck's personalized mRNA v= accines against melanoma demonstrate how mRNA technology has the potential =
to fundamentally challenge how cancer is treated. The vaccine's success off= ers a new paradigm for cancer therapies. The companies are already engaging=
with regulatory authorities to get the vaccine approved.
</span>
</span>
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<h1><strong>Programming, Design & Data Science</strong></h1>
</div>
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<span>
<strong>Your prompts deserve more c= ontext than you'll ever type (Sponsor)</strong>
</span>
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More context, better output from Cursor=
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r nofollow" target=3D"_blank"><span>Wispr Flow</span></a> lets you say it i= nstead: explain the bug and the edge cases out loud, and it types clean, fo= rmatted text in any app. 4x faster than typing, on Mac, Windows, iPhone and=
Android. <a href=3D"
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<span>
<a href=3D"
https://tracking.tldrnewsletter.= com/CL0/https:%2F%2Fwww.anthropic.com%2Fresearch%2Fformal-verification%3Fut= m_source=3Dtldrnewsletter/1/010001a16852d4e4-af08a25e-01dc-4454-87c5-436adc= 7b364a-000000/411GamSdwcFxoUq80xs9FoUNomnwMNZ28DfopeoxVuU=3D452">
<span>
<strong>LLMs are making formal soft= ware verification feasible at a much larger scale (23 minute read)</strong>
</span>
<span style=3D"font-family: "Helvetica Neue", Helvetica, Arial, V= erdana, sans-serif;">
We need ways to prove that code is free=
from bugs. Formal software verification, which could provide this guarante=
e, has always required years of expert effort, but LLMs can now produce for= mal proofs at large scale. This enables new software development workflows = that include proven security guarantees. Formal verification will likely be= come an essential part of secure software development as model capabilities=
continue to improve.
</span>
</span>
</div>
</td></tr></tbody></table>
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<a href=3D"
https://tracking.tldrnewsletter.= com/CL0/https:%2F%2Fblog.pragmaticengineer.com%2Fthe-pulse-anthropic-builds= -its-own-source-control-system%2F%3Futm_source=3Dtldrnewsletter/1/010001a16= 852d4e4-af08a25e-01dc-4454-87c5-436adc7b364a-000000/9Pwj2foaQXkGgdyFnI3vTAq= PIxBkwW3rhHImTZp4kTw=3D452">
<span>
<strong>Anthropic builds its own so= urce control system (15 minute read)</strong>
</span>
<span style=3D"font-family: "Helvetica Neue", Helvetica, Arial, V= erdana, sans-serif;">
Anthropic employs around 3,500 staff, b=
ut its coding output is closer to that of a company with 35,000 to 70,000 s= taff. Big tech companies like Google and Meta moved off Git a long time ago=
because it did not scale for them. Both built their own custom solutions, = just like Anthropic did with Scion. This post provides some details about h=
ow Anthropic's custom source control system works.
</span>
</span>
</div>
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<div style=3D"text-align: center;"><span style=3D"font-size: 36px;">=F0=9F= =8E=81</span></div></div>
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<div style=3D"text-align: center;"><strong><h1>Miscellaneous</h1></strong><= /div>
</div>
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<table align=3D"center" border=3D"0" cellpadding=3D"0" cellspacing=3D"0" wi= dth=3D"100%"><tbody><tr><td class=3D"container" style=3D"padding: 15px 15px=
<div class=3D"text-block">
<span>
<a href=3D"
https://tracking.tldrnewsletter.= com/CL0/https:%2F%2Fwww.theatlantic.com%2Ftechnology%2F2026%2F10%2Fman-who-= saved-internet-php-vulnerability%2F689123%2F%3Fgift=3DiWa_iB9lkw4UuiWbIbrWG= X0S2EScp28jU-louXZfg5I%26utm_source=3Dtldrnewsletter/1/010001a16852d4e4-af0= 8a25e-01dc-4454-87c5-436adc7b364a-000000/UHqpIoYk5viHJpE-GqpU5Kz4JLiOd3E3sn= 4Q2ThKElY=3D452">
<span>
<strong>=E2=80=98If Anything Happen=
s to This Guy =E2=80=A6 Everyone Is Screwed' (13 minute read)</strong>
</span>
<span style=3D"font-family: "Helvetica Neue", Helvetica, Arial, V= erdana, sans-serif;">
Ond=C5=99ej Sur=C3=BD is one of the vol= unteers who helps maintain and automate patches for PHP. He alone is respon= sible for most of the world's distribution of PHP. His work, along with jus=
t a handful of others, has allowed countless websites and organizations to = fix the recently revealed PHP vulnerabilities quickly. He's become arguably=
the unsung hero of the entire internet, despite the fact that the only com= pensation he receives for his work is from donations. This article features=
an interview with Sur=C3=BD where he discusses the unfolding AI-cybersecur= ity crisis, how the internet's infrastructure is maintained by small crews =
of volunteers, and how it feels to save the web.
</span>
</span>
</div>
</td></tr></tbody></table>
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<div class=3D"text-block">
<span>
<a href=3D"
https://tracking.tldrnewsletter.= com/CL0/https:%2F%2F3blue1brown.substack.com%2Fp%2Fan-artists-take-on-ai-in= -math%3Futm_source=3Dtldrnewsletter/1/010001a16852d4e4-af08a25e-01dc-4454-8= 7c5-436adc7b364a-000000/u0ohh0GBqkZYcgMa_dXJtGbYVQJ1S9ijudNWDhpgcOI=3D452">
<span>
<strong>An artist's take on AI in m= ath (9 minute read)</strong>
</span>
<span style=3D"font-family: "Helvetica Neue", Helvetica, Arial, V= erdana, sans-serif;">
Mathematics seems to be a field where t=
he outputs are celebrated less as examples of subjective expression and mor=
e as advancements in knowledge and understanding. A mathematician's work ma=
y be informed by their experience, but that's not what gives their contribu= tions value. Mathematical knowledge remains objectively true whether it is = observed by humans or sea sponges or computer programs.
</span>
</span>
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<div class=3D"text-block">
<div style=3D"text-align: center;"><span style=3D"font-size: 36px;">=E2=9A= =A1</span></div></div>
</td></tr></tbody></table>
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JPEG XL is the end-game universal image=
format because it has excellent compression efficiency, a universal featur=
e set, wide color depth, gamut, and native HDR, lossless JPEG transcoding, = high-speed parallel software encoding and decoding, and an open-source, per= missive license.
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The US has become increasingly reliant =
on foreign nations for dogs that play an important role in the US military = and law enforcement.
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k (17 minute read)</strong>
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Supervisory engineering work is a diffe= rent job from software engineering and so requires a different system aroun=
d it.
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<strong>Finance in the intelligence=
era (15 minute read)</strong>
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Finance companies in the AI era need to=
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<strong>I'm not doing 996 (18 minut=
e read)</strong>
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We are the ones who get to decide what =
to do with all of the productivity that AI creates.
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