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Recurrent Depth
Run the same Transformer layers again instead of adding new ones
token
2 opening
Ć 32 passes
4-layer core, same weights
2 closing
next token
8
layers stored
132
layer steps per token
2 + 4 Ć 32 + 2 = 132
a 3.5B model, Geiping et al. 2025
Recurrent Depth: Why Repeating the Same Transformer Layers Can Help
AI
Sep 3, 2026 Ā· 24 min
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284B on a Consumer GPU
Mixture of Experts: each token uses only a few experts
System RAM
every expert, the full 284B
GPU VRAM
reused experts; a hit runs here
miss: copy
over PCIe
or the CPU runs it
straight from system RAM,
no copy at all
or miss:
no copy
284B
parameters stored
about 13B
used for each token
8 routed experts
picked for each token
How a 284B Model Can Run on a Consumer GPU
AI
Aug 25, 2026 Ā· 51 min
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LLMs on Kubernetes
One 70B model, four GPUs per replica, a router that knows the cache
70B in BF16
140 GB
one GPU has 80 GB
split
One replica: tensor parallel 4
GPU 1
35 GB
GPU 2
35 GB
GPU 3
35 GB
GPU 4
35 GB
llm-d router
replica 1
cache hit
replica 3
spare
3 replicas carry the load, 1 is spare
The router sends a prompt to the replica that already holds its prefix.
How an LLM Actually Runs in Kubernetes
AI
Aug 23, 2026 Ā· 48 min
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LLM Inference Serving
A 70B chat model at 25,000 requests a second
1 s
0
2 s
First token in under 1 s
p99 target
Your
refund
was
sent
on
Friday
Then a new token every 40 ms or less
2,500
B200 GPUs at peak
$0.00026
per request
Premium
System Design: LLM Inference Serving (25K Requests/sec, Prefix-Aware Routing, KV Cache Tiers)
System Design
AI
Aug 22, 2026 Ā· 74 min
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LLM Safety
Pipeline
Most pass. A few are caught.
57 GPUs
busy, instead of 311 with
one big guard on everything
All
small guard
5%
8B guard
0.5%
refused
Most pass
Premium
System Design: LLM Safety Pipeline (25K Requests/sec, Guard Cascades, Streaming Checks, Safe Tool Use)
System Design
AI
Aug 22, 2026 Ā· 63 min
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LLM Evals Platform
Should release r18 replace r17?
r18 minus r17, in points
0
Refunds
+2.1
Regression suite
ā0.3
Harmless refused
+0.7
Keeping a correct answer
ā3.0
BLOCK
gate decision
Premium
System Design: LLM Evaluation Platform (Release Gates, Model Judges, Paired Statistics, Online Evals)
System Design
AI
Aug 21, 2026 Ā· 56 min
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Training a 70B Model
15 trillion tokens on 1,024 B200 GPUs
A stop about every 2 days
Loss
58 days
$13.4M
Day 0
Each square is one of the 1,024 GPUs
Day 58
Premium
System Design: Distributed 70B Training
System Design
AI
Aug 20, 2026 Ā· 68 min
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ML Model Serving
From 100 million items to the 25 you see
100M
items
1,600
found
500
ranked
25
shown
20,000
feeds a second
120 ms
p99, server side
$1.80
per million feeds
Premium
System Design: ML Model Serving Platform
System Design
AI
Aug 19, 2026 Ā· 99 min
DEEPSEEK HARNESS + CORDIS
Everything is a plugin.
The paper that explains how live components can leave cleanly.
PROVIDERS
CONSUMER
MODEL PLUGIN
TOOLS PLUGIN
SESSION PLUGIN
CORDIS CONTEXT
effects + dependencies + lifecycle
AGENT LOOP
provide
require
TEMPORAL
Undo what the plugin changed
register tool → remove tool
open resource → close resource
SPATIAL
React when a dependency changes
service appears → activate
service disappears → deactivate
A Programming Paradigm for Spatiotemporal Composability
DeepSeek Harness Says Everything Is a Plugin. Cordis Explains How That Can Work
AI
Software Architecture
Deep Dives
Aug 18, 2026 Ā· 25 min
How Can an Invisible Watermark Live Inside AI-Generated Text?
AI
Security
Deep Dives
Aug 11, 2026 Ā· 15 min
INSIDE THE HTTP TERMINATOR
138 documents in.
30,000 attacks out.
How the AI generated them, and why it was never allowed to say which ones worked.
WHAT THE MACHINE DID
138
documents
15,000
fragments
THE AI
reads each one
30,000
attack ideas
30,000
sites tested
~700
actually broke
WHO DECIDED WHAT
THE AI
invents the odd requests
allowed to be wrong
THE CODE
decides pass or fail
never argues, never guesses
THE PERSON
says which result matters
and why it matters
AI generates the possibilities. Code decides what survives. A person decides what any of it means.
HTTP Terminator Ā· PortSwigger Research, August 2026
How AI Helped Find New HTTP Attacks, and What It Actually Did
AI
Security
Deep Dives
Aug 7, 2026 Ā· 9 min
Proving You Are Over 18 Without Revealing Your Birth Date
Security
Deep Dives
Jul 30, 2026 Ā· 22 min
CRUSH
Controlled Replication Under Scalable Hashing
OBJECT
customer-123/
profile.jpg
PLACEMENT GROUP
PG 7.1d
1 of 128
CRUSH
cluster map + rule
+ device weights
OSD SET, IN ORDER
osd.1
rack-a / node-a
primary
osd.2
rack-a / node-b
replica
osd.5
rack-b / node-c
replica
no lookup table
topology aware
weighted by capacity
A Billion Objects, No Index: How Ceph Finds Anything
Deep Dives
Database
Jul 29, 2026 Ā· 32 min
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ChatGPT
The whole product, for a billion people a week
Can my landlord raise the
rent mid-lease in Bengaluru?
Thinking
Read your lease, searched the web
1B
weekly users
37,700
B200 GPUs at peak
$0.0014
a message
$151M a month
Ask anything
Premium
System Design: ChatGPT End-to-End (Inference, Memory, RAG, Streaming, RLHF)
System Design
AI
Jun 4, 2026 Ā· 117 min
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AI Software Engineer
From the next line of code to a whole app
L1
300 ms
the next line
L2
45 s
12 files changed
L3
4 hours
an app from one line
Premium
System Design: AI Software Engineer (From Autocomplete to Autonomous App Builder)
System Design
AI
Mar 25, 2026 Ā· 81 min
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RAG Platform
Answers that point to their sources
1
2
How does login work?
Answer
1
2
10M
questions a day
2M+
documents
RAG and LLM Platform at Scale: Ingestion, Retrieval, Generation, and Evaluation for 10M Queries/Day
System Design
AI
Mar 22, 2026 Ā· 56 min
AI Agent Platform
Restaurant operations intelligence at scale
Detect
Investigate
Act
DATA IN
POS Systems
Toast Ā· Square Ā· Clover
Delivery
DoorDash Ā· Uber Eats Ā· Grubhub
Payments
Stripe Ā· Adyen
Inventory
MarketMan Ā· BlueCart
Agent
Agent
Agent
Agent
ACTIONS OUT
Alerts
SMS Ā· Email Ā· Dashboard
Reports
Root cause analysis
Auto-Fix
Disputes Ā· Reorders Ā· Pauses
Insights
Trends Ā· ROI Ā· Recommendations
KAFKA Ā· FLINK Ā· CLICKHOUSE Ā· TEMPORAL Ā· LLM AGENTS
10K investigations/day Ā· Multi-tenant Ā· Real-time anomaly detection
Premium
Building a Multi-Tenant AI Agent Platform for Restaurant Intelligence
System Design
AI
Mar 17, 2026 Ā· 99 min
x402: Can HTTP 402 Power Payments for AI Agents?
AI
Blockchain
Deep Dives
Feb 21, 2026 Ā· 18 min
Updated
No Humans Allowed: Inside Moltbook, the AI-Only Social Network. Build and Deploy Your Own Autonomous Agent
AI
Jan 31, 2026 Ā· 18 min
Passwordless Authentication's Silent Choice: Trust vs Privacy
Security
Deep Dives
Aug 10, 2025 Ā· 8 min
Premium
End-to-End Encryption in Chat Applications
Security
Deep Dives
Jun 19, 2025 Ā· 13 min
BGP: The Backbone Protocol That Powers Global DNS and Content Delivery
Networking
Deep Dives
May 1, 2025 Ā· 12 min
QUIC and WebTransport: Rebuilding the Internet for the Real World
Networking
Deep Dives
Apr 29, 2025 Ā· 8 min
How Distributed Databases Handle Conflicts: Vector Clocks, Syncing, and Conflict Resolution
Database
Deep Dives
Apr 26, 2025 Ā· 4 min
ClickHouse Capabilities: A Quick Overview
Database
Deep Dives
Apr 9, 2025 Ā· 5 min
How Apache Iceberg powers the Data Lake and Trino Makes It Explorable
Data Engineering
Deep Dives
Apr 8, 2025 Ā· 7 min
How Apache Pinot Achieves Ultra-Low Latency Analytics for User-Facing Applications
Data Engineering
Deep Dives
Apr 8, 2025 Ā· 5 min
CockroachDB vs Google Spanner: A Deep Dive Beyond the Basics
Deep Dives
Database
Apr 8, 2025 Ā· 2 min
Securing Access: The Power of RBAC, ABAC, and ReBAC
Security
Deep Dives
Apr 8, 2025 Ā· 6 min
How Google Spanner Achieves Global Consistency
Deep Dives
Database
Apr 8, 2025 Ā· 6 min