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Harry Floyd

I write The Durability Curve. Practical essays on AI agents, markets, infrastructure, and the hidden constraints that decide what lasts.

Joined Joined on  Personal website https://harryfloyd.substack.com/
The Things You Used to Know by Heart: memory, thinking and AI
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The Things You Used to Know by Heart: memory, thinking and AI

#ai #career #machinelearning #productivity
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4 min read
One Question for Any AI Model Headline: Can You Use It?
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One Question for Any AI Model Headline: Can You Use It?

#ai #programming #beginners #productivity
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3 min read
Amazon Shut Out Meta's Agent: the week in AI, with six calls
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Amazon Shut Out Meta's Agent: the week in AI, with six calls

#ai #programming #agents #devops
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11 min read
Use AI to Learn Without Getting Worse at It
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Use AI to Learn Without Getting Worse at It

#ai #programming #career #beginners
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9 min read
Show It an Example: why 'make it distinctive' gets you the most ordinary output
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Show It an Example: why 'make it distinctive' gets you the most ordinary output

#ai #programming #beginners #productivity
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4 min read
Survivorship bias: why your evidence is only what survived
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Survivorship bias: why your evidence is only what survived

#discuss #productivity #analysis #architecture
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4 min read
Induced demand: why widening a road never ends the jam
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Induced demand: why widening a road never ends the jam

#discuss #productivity #architecture #analysis
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5 min read
The Skill That Never Fired: How to Test Whether Claude Actually Picks Your Skill
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The Skill That Never Fired: How to Test Whether Claude Actually Picks Your Skill

#ai #agents #tutorial #productivity
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Comments 3
13 min read
The Work That Comes Due After You Leave: the step you forgot
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The Work That Comes Due After You Leave: the step you forgot

#productivity #analysis #architecture
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8 min read
Memory Capacity Binds Before FLOPs Do: AgentX and the Agentic Inference Bottleneck
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Memory Capacity Binds Before FLOPs Do: AgentX and the Agentic Inference Bottleneck

#ai #machinelearning #infrastructure #analysis
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2 min read
You're Comparing Contracts, Not Models: agent benchmarks
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You're Comparing Contracts, Not Models: agent benchmarks

#ai #agents #testing #machinelearning
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6 min read
Your Tools Got Powerful. Get Boring.
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Your Tools Got Powerful. Get Boring.

#ai #agents #machinelearning #architecture
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6 min read
Your AI Agent Stack: MCP and skills vs the contract stack
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Your AI Agent Stack: MCP and skills vs the contract stack

#ai #agents #machinelearning #architecture
Comments 1
6 min read
You Only Hold Four Thoughts: working memory and tools
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You Only Hold Four Thoughts: working memory and tools

#ai #architecture #productivity #analysis
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6 min read
You Cannot Try to Fall Asleep
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You Cannot Try to Fall Asleep

#ai #agents #testing #analysis
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6 min read
Three Hidden Bottlenecks the AI Buildout Has Already Moved Past GPUs
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Three Hidden Bottlenecks the AI Buildout Has Already Moved Past GPUs

#ai #machinelearning #architecture #investing
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6 min read
The Substrate Map: find your substrate-to-canopy ratio
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The Substrate Map: find your substrate-to-canopy ratio

#ai #agents #testing #machinelearning
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2 min read
The Stable Liar: how a metric keeps reporting green
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The Stable Liar: how a metric keeps reporting green

#ai #productivity #analysis #research
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5 min read
The SpaceX IPO: which layer investors actually own
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The SpaceX IPO: which layer investors actually own

#ai #productivity #investing #infrastructure
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5 min read
The Other Half of Compute: what a gigawatt actually buys
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The Other Half of Compute: what a gigawatt actually buys

#ai #machinelearning #architecture #infrastructure
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5 min read
The Lens Lexicon: ten terms behind the durability lens
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The Lens Lexicon: ten terms behind the durability lens

#ai #testing #architecture #investing
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2 min read
The Investor's Substrate Test: score any position
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The Investor's Substrate Test: score any position

#ai #agents #testing #architecture
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2 min read
The Guardrail Your Agent Can Reach: agent hook security
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The Guardrail Your Agent Can Reach: agent hook security

#ai #agents #testing #machinelearning
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5 min read
The Forest Floor Is The Product: substrate over canopy
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The Forest Floor Is The Product: substrate over canopy

#ai #machinelearning #architecture #productivity
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5 min read
The Five Laws of Durable Systems
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The Five Laws of Durable Systems

#ai #agents #testing #machinelearning
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5 min read
The Eight Stages Underneath Hard Decisions
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The Eight Stages Underneath Hard Decisions

#ai #testing #machinelearning #architecture
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5 min read
The Displacement Rate Audit: score any bet in five minutes
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The Displacement Rate Audit: score any bet in five minutes

#ai #agents #testing #machinelearning
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2 min read
The Cheaper Fix You Keep Skipping: aim before capability
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The Cheaper Fix You Keep Skipping: aim before capability

#ai #testing #machinelearning #architecture
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6 min read
Taste Is What You Delete: the scarce skill after AI
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Taste Is What You Delete: the scarce skill after AI

#ai #machinelearning #productivity #analysis
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6 min read
Start Here: What Survives When The Surface Changes?
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Start Here: What Survives When The Surface Changes?

#ai #agents #testing #machinelearning
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6 min read
AI Agent Skills Are Package Management
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AI Agent Skills Are Package Management

#ai #agents #machinelearning #architecture
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6 min read
Self-Improving Agents Are a Release Engineering Problem
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Self-Improving Agents Are a Release Engineering Problem

#ai #agents #machinelearning #architecture
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6 min read
Right Company, Wrong Vector: why a pick is not a position
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Right Company, Wrong Vector: why a pick is not a position

#ai #testing #investing #analysis
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6 min read
Right About AI, Wiped Out Anyway: the $725bn question
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Right About AI, Wiped Out Anyway: the $725bn question

#ai #architecture #investing #infrastructure
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6 min read
Agent Memory Is Not Learning: the loop that improves it
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Agent Memory Is Not Learning: the loop that improves it

#ai #agents #testing #programming
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6 min read
Prompting Isn't Writing, It's Compilation
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Prompting Isn't Writing, It's Compilation

#ai #agents #testing #machinelearning
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6 min read
PLTR: The AI Stock That Has To Prove It Owns The Permission Layer
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PLTR: The AI Stock That Has To Prove It Owns The Permission Layer

#ai #machinelearning #investing #analysis
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6 min read
The 90-Day Canopy Audit: is your roadmap displaceable?
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The 90-Day Canopy Audit: is your roadmap displaceable?

#ai #agents #testing #machinelearning
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6 min read
Is This Difficulty Load-Bearing?
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Is This Difficulty Load-Bearing?

#ai #agents #testing #machinelearning
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1 min read
Five Patterns Across 3,000 Papers and 12 Fields
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Five Patterns Across 3,000 Papers and 12 Fields

#ai #testing #machinelearning #architecture
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6 min read
AI Made You Faster. It Did Not Make You Safer.
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AI Made You Faster. It Did Not Make You Safer.

#ai #agents #testing #machinelearning
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6 min read
How Reliable Is Your AI Agent?
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How Reliable Is Your AI Agent?

#ai #agents #testing #architecture
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6 min read
Most AI Verification Is Just Bigger Classification
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Most AI Verification Is Just Bigger Classification

#ai #testing #analysis #architecture
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5 min read
The Average Is Nobody's Result
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The Average Is Nobody's Result

#ai #analysis #machinelearning #productivity
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5 min read
Your Robot Coworker Is Still a Pilot
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Your Robot Coworker Is Still a Pilot

#ai #robotics #analysis #architecture
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5 min read
Where Your Metrics Fold: accurate and still misleading
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Where Your Metrics Fold: accurate and still misleading

#ai #architecture #analysis #productivity
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5 min read
The Leverage Hierarchy of Agent Engineering
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The Leverage Hierarchy of Agent Engineering

#ai #agents #architecture #productivity
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4 min read
Your AI Looks Best Where You Can Check It Least
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Your AI Looks Best Where You Can Check It Least

#ai #programming #productivity #architecture
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7 min read
Three AI Stack Bugs Other Fields Already Fixed
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Three AI Stack Bugs Other Fields Already Fixed

#ai #programming #architecture #productivity
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7 min read
AI Can Write Your Code. That Does Not Mean It Should.
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AI Can Write Your Code. That Does Not Mean It Should.

#ai #programming #productivity #career
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4 min read
Your Tests Pass. So What?
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Your Tests Pass. So What?

#ai #testing #programming #infrastructure
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18 min read
When Your Research Agent Cites Sources It Never Read
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When Your Research Agent Cites Sources It Never Read

#ai #programming #analysis #architecture
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7 min read
Your Multi-Agent System Is an Org Chart
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Your Multi-Agent System Is an Org Chart

#ai #architecture #software #agents
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11 min read
Why Agent Benchmarks Miss Long-Running Task Reliability
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Why Agent Benchmarks Miss Long-Running Task Reliability

#ai #llm #architecture #analysis
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4 min read
Never Let Claude Code Tell You It's Done: a stop-hook gate
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Never Let Claude Code Tell You It's Done: a stop-hook gate

#ai #testing #programming #tutorial
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3 min read
How Long Until Your AI Edge Stops Paying?
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How Long Until Your AI Edge Stops Paying?

#ai #analysis #architecture #productivity
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4 min read
Access Is Not Agency: agent permissions and action contracts
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Access Is Not Agency: agent permissions and action contracts

#ai #architecture #security #devops
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3 min read
Ten Lines Scored 100%: how AI benchmarks break
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Ten Lines Scored 100%: how AI benchmarks break

#ai #programming #evaluation #architecture
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4 min read
The Seven-Layer Agent Audit: How to Find Where Your AI Agent Is Actually Starving
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The Seven-Layer Agent Audit: How to Find Where Your AI Agent Is Actually Starving

#ai #llm #architecture #debugging
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4 min read
What Proves You Can Think?
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What Proves You Can Think?

#ai #productivity #career #architecture
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3 min read
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