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Umesh Malik

I'm Umesh Malik, a Software Engineer based in Gurugram, India. I specialise in building scalable, high-performance web applications with a focus on React, TypeScript, and modern web architecture.

Location Gurugram, Haryana, India Joined Joined on  Personal website https://umesh-malik.com/
Gemini agent hooks fail open: how to block a tool call anyway
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Gemini agent hooks fail open: how to block a tool call anyway

#aisecurity #agentharness #gemini #mcp
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9 min read
How to verify AI-generated benchmark claims: 1.4x to 1.5x slower
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How to verify AI-generated benchmark claims: 1.4x to 1.5x slower

#aicodingagentsdx #benchmarking #evals #llmagents
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9 min read
SVG to MP4 in the browser: a two-step workflow, no server
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SVG to MP4 in the browser: a two-step workflow, no server

#webengineering #webassembly #svg #browsertools
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8 min read
Rust GPU Offload Without unsafe: The 400x Mistake That Isn't Safety
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Rust GPU Offload Without unsafe: The 400x Mistake That Isn't Safety

#rust #gpuprogramming #llvm #performanceengineering
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8 min read
Turn off AI features permanently: configure 1 policy, not 25 toggles
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Turn off AI features permanently: configure 1 policy, not 25 toggles

#aisecurity #privacy #chrome #windows
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11 min read
AI writing policy for engineers: the template and 5 checks
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AI writing policy for engineers: the template and 5 checks

#technicalwriting #engineeringculture #aipolicy #documentation
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12 min read
Remove Cloudflare beacon.min.js: you must opt in to opt out
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Remove Cloudflare beacon.min.js: you must opt in to opt out

#cloudflare #webperf #contentsecuritypolicy #privacy
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10 min read
How DNA wires a brain: 300M bits for 100 trillion connections
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How DNA wires a brain: 300M bits for 100 trillion connections

#neuroscience #informationtheory #aiengineering #algorithms
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9 min read
Zero downtime database migration: 5 flags and a 17x P90 gap
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Zero downtime database migration: 5 flags and a 17x P90 gap

#database #infrastructure #migration #observability
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11 min read
Fix EEVDF latency regressions with sched_ext: Meta's 28% p99 win
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Fix EEVDF latency regressions with sched_ext: Meta's 28% p99 win

#linux #performance #kernel #taillatency
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11 min read
Qwen3.8 27B VRAM: how to fit 262K context in 16 GiB, not 64
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Qwen3.8 27B VRAM: how to fit 262K context in 16 GiB, not 64

#llminference #vllm #qwen #kvcache
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10 min read
Configure Cloudflare Access for Workers: auth before your code runs
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Configure Cloudflare Access for Workers: auth before your code runs

#cloudflare #cloudflareworkers #zerotrust #aisecurity
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9 min read
Kubernetes on bare metal: the 4 cloud integrations you must build
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Kubernetes on bare metal: the 4 cloud integrations you must build

#kubernetes #infrastructure #baremetal #storage
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10 min read
Cut agent tool call cost: GitHub's 20% fix was a prompt rewrite
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Cut agent tool call cost: GitHub's 20% fix was a prompt rewrite

#aicodingagents #agentdesign #developertooling #promptengineering
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9 min read
Build your research spike as running code: 8 blockers a doc missed
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Build your research spike as running code: 8 blockers a doc missed

#engineeringpractice #aicodingagents #prototyping #database
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10 min read
How to Verify AI Crawler IPs: 3 Lists Are Over a Year Stale
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How to Verify AI Crawler IPs: 3 Lists Are Over a Year Stale

#aisecurity #webcrawlers #botverification #agenticweb
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9 min read
Build on-device AI without breaking E2EE: the metrics leak first
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Build on-device AI without breaking E2EE: the metrics leak first

#aisecurity #privacyengineering #ondeviceml #confidentialcomputing
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9 min read
Agent context compaction: keep what the 150K cutoff drops
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Agent context compaction: keep what the 150K cutoff drops

#aiagents #contextengineering #claudeapi #agentarchitecture
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9 min read
Fix slow LLM inference in macOS VMs: 12.6 207 tok/s
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Fix slow LLM inference in macOS VMs: 12.6 207 tok/s

#llminference #applesilicon #virtualization #llamacpp
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10 min read
How to Test an LLM's Knowledge Cutoff: Opus 5's May Claim Falls Short
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How to Test an LLM's Knowledge Cutoff: Opus 5's May Claim Falls Short

#llmengineering #modelevaluation #claudeopus5 #gpt56
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8 min read
Learn Complex Topics With Claude Code: Build a Simulation, Not Notes
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Learn Complex Topics With Claude Code: Build a Simulation, Not Notes

#claudecode #aicodingagents #learning #developerproductivity
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8 min read
Run Muse Glimmer 30B locally: 55GB shrinks to under 20GB
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Run Muse Glimmer 30B locally: 55GB shrinks to under 20GB

#localllm #quantization #aicodingagents #openweights
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8 min read
vLLM throughput tuning: configure these four flags, not a bigger GPU
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vLLM throughput tuning: configure these four flags, not a bigger GPU

#llmengineering #llminference #vllm #gpu
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9 min read
How to sandbox an AI agent: 10 of 122 eval runs went rogue
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How to sandbox an AI agent: 10 of 122 eval runs went rogue

#aisecurity #aiagents #sandboxing #supplychainsecurity
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10 min read
Run CI/CD on Cloudflare Workflows: deploy in 18 lines, 33 free runs
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Run CI/CD on Cloudflare Workflows: deploy in 18 lines, 33 free runs

#cloudflare #cicd #workflows #devrel
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10 min read
Configure Dependabot grouped updates: one PR a month, CVEs instant
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Configure Dependabot grouped updates: one PR a month, CVEs instant

#dependabot #github #supplychainsecurity #dependencymanagement
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9 min read
Fix your agent tool instructions: GitHub's 20% review-cost cut
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Fix your agent tool instructions: GitHub's 20% review-cost cut

#aicodingagents #tooldesign #mcp #developertooling
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10 min read
Set up AI Gateway for Workers AI: one argument, every call logged
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Set up AI Gateway for Workers AI: one argument, every call logged

#aiengineering #cloudflare #workersai #observability
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11 min read
Fix the Datasette SQL Injection: Why execute-sql Won't Save You
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Fix the Datasette SQL Injection: Why execute-sql Won't Save You

#webengineering #security #sqlinjection #sqlite
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9 min read
Configuring AI Agent Permissions: Humans Miss 1 in 3 Threats
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Configuring AI Agent Permissions: Humans Miss 1 in 3 Threats

#aisecurity #aicodingagents #claudecode #permissions
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10 min read
How to Make Your Site Agent-Readable: 4 Layers, One Worker
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How to Make Your Site Agent-Readable: 4 Layers, One Worker

#agenticweb #webengineering #mcp #cloudflare
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10 min read
Run agent tool calls in parallel: 10 turns become 2 DAG levels
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Run agent tool calls in parallel: 10 turns become 2 DAG levels

#agentarchitecture #parallelism #agentharness #observability
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10 min read
Ads for AI Agents: TIME Serves Crawlers a Different Site
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Ads for AI Agents: TIME Serves Crawlers a Different Site

#aiagents #agenticweb #webengineering #geo
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10 min read
Reinforcement Fine-Tuning: When a 4B Model Beats GPT-5.6
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Reinforcement Fine-Tuning: When a 4B Model Beats GPT-5.6

#llmengineering #finetuning #rag #reinforcementlearning
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10 min read
Rust LLM Policy: Use AI to Review, Not to Create
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Rust LLM Policy: Use AI to Review, Not to Create

#opensource #aicodingagents #rust #codereview
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10 min read
MCP Write Controls: Lessons from Cloudflare WriteGuard
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MCP Write Controls: Lessons from Cloudflare WriteGuard

#mcp #aiagents #aisecurity #cloudflare
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12 min read
Insider Threat Offboarding Controls: The Apple v. OpenAI Lesson
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Insider Threat Offboarding Controls: The Apple v. OpenAI Lesson

#aisecurity #insiderthreat #offboarding #tradesecrets
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10 min read
How to Secure MCP Write Tools: Cloudflare's WriteGuard Lesson
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How to Secure MCP Write Tools: Cloudflare's WriteGuard Lesson

#mcp #aisecurity #aiagents #accesscontrol
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10 min read
LLM Abuse Detection: What OpenAI's Scam Ban Reveals
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LLM Abuse Detection: What OpenAI's Scam Ban Reveals

#aisecurity #trustandsafety #threatintelligence #llmengineering
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10 min read
Agent Harness Design: Why an ARC-AGI-3 Score Tripled
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Agent Harness Design: Why an ARC-AGI-3 Score Tripled

#aiagents #agentdesign #benchmarks #llmengineering
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10 min read
Production-Grade AI Agents: The Vibe-to-Live Gap
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Production-Grade AI Agents: The Vibe-to-Live Gap

#aiagents #aiengineering #evals #observability
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10 min read
Cloudflare Wallets and x402: How AI Agents Pay for APIs
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Cloudflare Wallets and x402: How AI Agents Pay for APIs

#aiagents #cloudflare #x402 #agenticweb
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9 min read
LLM Eval Framework: Grade Prompts, Models and Harnesses
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LLM Eval Framework: Grade Prompts, Models and Harnesses

#llmengineering #evals #promptengineering #developertooling
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10 min read
Fake CVE Reports: 54 of 55 SQLite Advisories Were AI Slop
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Fake CVE Reports: 54 of 55 SQLite Advisories Were AI Slop

#aisecurity #vulnerabilitymanagement #opensource #sqlite
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11 min read
Run 70B LLM on 4GB GPU: AirLLM's Real Tradeoff
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Run 70B LLM on 4GB GPU: AirLLM's Real Tradeoff

#llmengineering #llminference #localllm #quantization
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10 min read
Agent-to-Human Delegation: Why Your AI Shouldn't DM Coworkers
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Agent-to-Human Delegation: Why Your AI Shouldn't DM Coworkers

#aiagents #agentdesign #humanintheloop #openai
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10 min read
Explorative Modeling: Train on the Best of K Guesses
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Explorative Modeling: Train on the Best of K Guesses

#generativemodels #diffusion #training #scalinglaws
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8 min read
DeepSeek V4 Flash 0731 Benchmarks: 13B Active Beats 1.6T
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DeepSeek V4 Flash 0731 Benchmarks: 13B Active Beats 1.6T

#deepseek #llms #openweights #aiagents
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9 min read
How to Increase SEO Traffic in the AI Era: 10 Techniques (2026)
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How to Increase SEO Traffic in the AI Era: 10 Techniques (2026)

#seo #geo #aisearch #contentstrategy
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7 min read
SEO in the AI Era: The 2026 GEO Playbook for Winning AI Search Traffic
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SEO in the AI Era: The 2026 GEO Playbook for Winning AI Search Traffic

#seo #geo #aisearch #contentstrategy
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11 min read
Claude Opus 5 Migration: The Two API Changes That Break Your Code
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Claude Opus 5 Migration: The Two API Changes That Break Your Code

#claudeopus5 #anthropic #llm #aicodingagents
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11 min read
Vercel AI SDK in Production: Streaming, Tool-Calling & the Gotchas Nobody Tells You (2026)
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Vercel AI SDK in Production: Streaming, Tool-Calling & the Gotchas Nobody Tells You (2026)

#vercelaisdk #nextjs #react #streaming
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10 min read
React Server Components in 2026: The Mental Model, the use client Boundary & When Not to Use Them
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React Server Components in 2026: The Mental Model, the use client Boundary & When Not to Use Them

#react #reactservercomponents #nextjs #webperf
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7 min read
Build a RAG Chatbot in Next.js: Retrieval, Streaming & Citations (2026)
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Build a RAG Chatbot in Next.js: Retrieval, Streaming & Citations (2026)

#rag #nextjs #vectordatabases #llmengineering
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8 min read
Kimi K3 vs Claude Fable 5: When the Open Model Is Worth the Switch
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Kimi K3 vs Claude Fable 5: When the Open Model Is Worth the Switch

#ai #kimik3 #claude #moonshotai
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7 min read
Streaming HTML Out of Order Without JavaScript (2026)
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Streaming HTML Out of Order Without JavaScript (2026)

#html #webplatform #performance #streaming
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13 min read
GPT-5.6 API: Pricing, Thinking Modes, and the Shared Context Trap
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GPT-5.6 API: Pricing, Thinking Modes, and the Shared Context Trap

#ai #openai #chatgpt #gpt56
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10 min read
GPT-5.6 Sol vs Terra vs Luna: The Routing Strategy That Cuts Cost
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GPT-5.6 Sol vs Terra vs Luna: The Routing Strategy That Cuts Cost

#ai #openai #gpt56 #api
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6 min read
ChatGPT Apps SDK and the Super App Reform: How Apps in ChatGPT Work (2026)
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ChatGPT Apps SDK and the Super App Reform: How Apps in ChatGPT Work (2026)

#ai #openai #chatgpt #appssdk
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7 min read
How to Build Enterprise-Grade AI Agents for Free (MaxKB, 2026)
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How to Build Enterprise-Grade AI Agents for Free (MaxKB, 2026)

#aiagents #maxkb #opensource #rag
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10 min read
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