Reid Marlow

A technologist working in automation. Here I write up what I actually learn building tools, engineering AI agents, and keeping systems running, along with the workflows and habits that stick.

New York, New York Joined on Jun 20, 2026 komoai2026@gmail.com https://reidmarlow.com

Education

Hong Kong Polytechnic University, Automation PhD (in progress)

Pronouns

he/him

Work

PhD candidate in Automation (Hong Kong Polytechnic University)

Pinned

Reid Marlow

Oct 9

Why Token-Level LLM Routers Spend 95% of Their Time on Cache Bookkeeping

#ai #llm #python #architecture

6 min read

Reid Marlow

Oct 4

When Agent Evals Score Cash Balance, the Model Invents Refund Fraud

#discuss #ai #testing #programming

4 min read

Reid Marlow

Sep 30

Search Agents Waste Half Their Tokens Rediscovering Entity Links

#ai #agents #rag #devtools

5 min read

Reid Marlow

Nov 7

Anthropic Doubled R&D Speed Without Adding Compute: Inside the METR Audit

#ai #programming #architecture #softwareengineering

4 min read

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Reid Marlow

Nov 6

Stop Swapping Models: Optimizing the Agent Environment Cuts 70% More Cost

#ai #programming #architecture #devops

5 min read

Reid Marlow

Nov 4

Why Predicting Winner Models Breaks AI Routers

#ai #architecture #programming #devops

5 min read

Reid Marlow

Nov 3

Why 80% on OSWorld Required VM Snapshot Rollbacks

#ai #agents #automation #programming

5 min read

Reid Marlow

Nov 2

Standard bf16 Rounding Discards 99% of Your RL Policy Updates

#ai #machinelearning #python #programming

4 min read

Reid Marlow

Nov 1

Claude's Watermark Disappears When You Tune Temperature

#ai #anthropic #devtools #programming

4 min read

Reid Marlow

Oct 31

Why DeepSeek Built Its Coding Agent Around Attention Budgets

#ai #devtools #programming #github

4 min read

Reid Marlow

Oct 30

Why Nvidia Put Mamba and Attention Together for Agents

#ai #agents #devtools #programming

4 min read

Reid Marlow

Oct 29

Why Google Gated Gemini 4 Carbon Behind Defensive Cohorts

#ai #agents #security #devtools

3 min read

Reid Marlow

Oct 28

Why Changing an Agent Harness Breaks Frozen Models

#ai #agents #opensource #programming

3 min read

Reid Marlow

Oct 28

Why Your Agent Memory System Gets Beaten by Raw Retrieval

#ai #agents #machinelearning #opensource

4 min read

Reid Marlow

Oct 26

Why In-Context Corrections Do Not Stick in Agent Loops

#ai #agents #python #opensource

4 min read

Reid Marlow

Oct 25

OpenAI Built an Offline Internet for Agents, and the Canary String Explains Why

#ai #security #machinelearning #devops

2 min read

Reid Marlow

Oct 24

The Mosaic Leak Hiding in Agent RAG

#ai #security #python #programming

3 min read

Reid Marlow

Oct 23

The Agent Loophole Nobody Logged

#ai #security #devops #programming

3 min read

Reid Marlow

Oct 22

Why Stacking RAG Tricks Stops Adding Up

#ai #rag #programming #architecture

4 min read

Reid Marlow

Oct 21

Stop Asking Video Models to Run Physics: Inside Matrix-Game 4.0

#ai #gamedev #python #architecture

2 min read

Reid Marlow

Oct 20

Stop Re-Streaming Context: What MemT-1.0 Shows About Native Memory

#ai #architecture #programming #infrastructure

2 min read

Reid Marlow

Oct 19

The Wall Clock Problem in Embodied Benchmarks

#robotics #ai #benchmarks #agents

2 min read

Reid Marlow

Oct 18

Why vLLM 0.32 Baked Decision Routing Into the Engine

#ai #opensource #python #programming

4 min read

Reid Marlow

Oct 17

Stop Wrapping CLI Tools in 200 MCP Endpoints

#ai #agents #cli #opensource

1 min read

Reid Marlow

Oct 16

Why GUI-Only Agents Waste Half Their Steps

#ai #automation #python #devops

3 min read

Reid Marlow

Oct 15

Stop Shuffling Markdown Files: What Happens When Long-Term Agent Memory Moves into Weights

#ai #agents #machinelearning #devtools

5 min read

Reid Marlow

Oct 15

Why Google Put a Runtime Monitor on Gemini 4 Argon

#discuss #ai #devtools #programming

4 min read

Reid Marlow

Oct 12

Synthetic GUI Benchmarks Fail When the App Doesn't Actually Run

#ai #agents #benchmarks #devtools

2 min read

Reid Marlow

Oct 10

Anthropic Had to Unplug Its Agent Evals From the Internet

#ai #agents #security #testing

5 min read

Reid Marlow

Oct 8

Stop Rebuilding Your Agent Loop Just to Train It with RL

#ai #agents #python #kubernetes

5 min read

Reid Marlow

Oct 7

Agents Score 97% on Static Tool Judgments and Still Break Interactive Workflows

#ai #agents #automation #programming

7 min read

Reid Marlow

Oct 5

Scaffolded Trajectories Make Terrible Agent Training Data

#ai #agents #automation #testing

3 min read

Reid Marlow

Oct 3

Auditing 50 Petabytes of Agent Logs Costs More Than Sandboxing Egress

#ai #security #devops #cloud

4 min read

Reid Marlow

Oct 2

Speculative Decoding for Coding Agents Was Indexing the Wrong Format

#ai #agents #devtools #programming

4 min read

Reid Marlow

Oct 1

Action Scaling at the Harness Boundary Beats Trajectory Re-Runs

#ai #agents #devtools #linux

5 min read

Exact logs matter more than summaries

Reid Marlow

Sep 28

Context Compression for Coding Agents Compresses the Wrong Side of the Prompt

#ai #devtools #programming

3 min read

Reid Marlow

Sep 27

OpenAI Paused Model Training Because Its Web Agents Probed Endpoints

#ai #agents #security #devtools

4 min read

Reid Marlow

Sep 26

Self-Replicating Prompt Injections Turn Agent Context into an Open Relay

#ai #security #agents #devtools

4 min read

Reid Marlow

Sep 25

Multi-Agent Debate Sharpens the Explanation, Not the Decision

#ai #agents #devtools #programming

3 min read

Reid Marlow

Sep 24

World Models for Agents Should Edit Transcripts, Not Simulate Terminals

#ai #agents #devtools #programming

4 min read

Reid Marlow

Sep 23

How Long-Horizon Agents Kept Busting the Prompt Cache

#ai #agents #devtools #openai

2 min read

Reid Marlow

Sep 22

Agent Harness Self-Improvement Without Benchmark Memorization

#ai #agents #devtools #programming

2 min read

Reid Marlow

Sep 19

Self-hosting small models hits the ingress bottleneck before the GPU

#ai #python #performance #modal

3 min read

Reid Marlow

Sep 18

The coding agent harness paper finally ran component ablations

#ai #agents #coding #softwareengineering

3 min read

Reid Marlow

Sep 17

LLM agents turn code interpreters into portfolio sizing engines when you evolve the prompt

#ai #agents #python #programming

3 min read

Reid Marlow

Sep 15

Stop stuffing the web into 7B weights

#ai #opensource #agents #llm

3 min read

Reid Marlow

Sep 10

The Agent Passed SWE-Bench Pro Because git show Still Had the Fix

#ai #agents #productivity #opensource

3 min read

Reid Marlow

Sep 10

A Model Swap Can Keep the Memory File and Still Lose the Facts

#ai #llm #productivity #programming

4 min read

Reid Marlow

Aug 27

The Agent Hack Postmortem Is Really About Shared State

#ai #agents #security #devops

4 min read

Reid Marlow

Aug 26

WeChat's embedding model is a deployment story, not a leaderboard flex

#discuss #ai #programming #search

6 min read

Reid Marlow

Aug 22

Claude Opus 4.6 Shows Why Old Models Need Patch Windows

#ai #safety #agents #devtools

5 min read

Reid Marlow

Aug 21

AI Capex Is Turning Into an Infrastructure Bill

#discuss #ai #cloud #programming

5 min read

Reid Marlow

Aug 18

World Model Benchmarks Need Receipts, Not Just Scores

#ai #devtools #programming #productivity

5 min read

Reid Marlow

Aug 15

The Important Part of Anthropic's Risk Report Is the Benchmark That Stopped Moving

#ai #agents #programming #productivity

4 min read

Agent loops matter more than raw token cost

Reid Marlow

Aug 14

Gemini 3.7 Flash Makes Agent Cost the Feature

#ai #devtools #programming #productivity

4 min read

Reid Marlow

Aug 13

DeepSeek's Harness Is the Price Signal

#discuss #ai #programming #devtools

1 min read

Reid Marlow

Aug 11

Nvidia's Router Is the Part of Agents Everyone Keeps Rebuilding

#ai #agents #nvidia #programming

4 min read

Reid Marlow

Aug 10

Why ChatGPT answers in Markdown

#ai #llm #markdown #productivity

6 min read

Reid Marlow

Aug 2

Open Weights Are Now a Policy Fight

#ai #opensource #programming #devtools

5 min read

Reid Marlow

Aug 1

Browser Agents Aren't About Browsers. They're About Who Acts for You.

#ai #agents #security #webdev

4 min read

Reid Marlow

Aug 1

OpenAI's Math Post Is Really About Audit Trails

#ai #agents #devtools #math

4 min read

Reid Marlow

Jul 31

Agent-Built Software Still Needs a Human-Shaped Test

#ai #programming #opensource #webdev

3 min read

Reid Marlow

Jul 30

Robots Don't Need an LLM in the Fast Loop

#ai #robotics #agents #devtools

5 min read