Kushal Sharma builds AI infrastructure at Muse Mesh — an LLM gateway, self-hosted agent frameworks, and open-source tooling. Previously ten years shipping Android at Flipkart.https://kushalsharma.github.io/en-ushttps://kushalsharma.github.io/writing/esp32-pinout-cheat-sheet/https://kushalsharma.github.io/writing/esp32-pinout-cheat-sheet/Every pinout diagram tells you what each pin can do. Almost none of them lead with what will stop your board booting, or which pins go dead the moment you turn on Wi-Fi. This is the reference I ended up writing for myself.Thu, 30 Jul 2026 00:00:00 GMTesp32hardwarereferenceembeddedhttps://kushalsharma.github.io/writing/same-thing-for-ten-years/https://kushalsharma.github.io/writing/same-thing-for-ten-years/A JSON layout engine, a schema-to-code generator, two widget frameworks, and now an LLM gateway. Four companies, four stacks, one idea I did not notice until I wrote them down in order.Mon, 27 Jul 2026 00:00:00 GMTinfrastructurecareerandroidllmhttps://kushalsharma.github.io/writing/the-query-was-lying/https://kushalsharma.github.io/writing/the-query-was-lying/I was auditing a production database to find what was safe to delete. Two of my findings said "dead, safe to remove" and both were artefacts of how I was measuring.Sun, 26 Jul 2026 00:00:00 GMTfirestoredatabasesproductiondebugginghttps://kushalsharma.github.io/writing/gateways-route-mine-bills/https://kushalsharma.github.io/writing/gateways-route-mine-bills/Routing between model providers is the commoditised half of the problem. The half nobody wants to build is knowing whose money you just spent — and it is the half that decides whether your AI product has a business model.Fri, 24 Jul 2026 00:00:00 GMTllminfrastructurebillinggatewayhttps://kushalsharma.github.io/writing/one-user-infinite-loop/https://kushalsharma.github.io/writing/one-user-infinite-loop/Nobody has to be malicious. A retry policy, an agent that does not know when to stop, and a for-loop over a spreadsheet are enough. Here is the arithmetic, and what actually stops it.Wed, 22 Jul 2026 00:00:00 GMTllminfrastructurebillingreliabilityhttps://kushalsharma.github.io/writing/esp32-ai-buddy/https://kushalsharma.github.io/writing/esp32-ai-buddy/An ESP32 with an animated face, a microphone, a speaker and a wireless camera eye. You hold a button and talk to it, and it can call tools that move real hardware.Mon, 20 Jul 2026 00:00:00 GMTesp32hardwareai-agentsbuddyhttps://kushalsharma.github.io/writing/pcb-with-an-agent/https://kushalsharma.github.io/writing/pcb-with-an-agent/KiCad driven through an MCP server, autorouted, ground poured, DRC clean at zero errors. Also: the four things it got wrong, which are the interesting part.Fri, 17 Jul 2026 00:00:00 GMTesp32hardwareai-agentskicadmcphttps://kushalsharma.github.io/writing/microcontroller-is-a-terminal/https://kushalsharma.github.io/writing/microcontroller-is-a-terminal/Version one ran everything on the ESP32 and was permanently out of memory. Version two moved the thinking to a proxy and got unbounded speech, streaming replies and swappable models for free.Wed, 15 Jul 2026 00:00:00 GMTesp32hardwarearchitectureai-agentshttps://kushalsharma.github.io/writing/the-flicker-was-the-radar/https://kushalsharma.github.io/writing/the-flicker-was-the-radar/A desk instrument started flickering on every screen. The cause was a sensor that had nothing to do with drawing, running on a schedule that had everything to do with it.Mon, 13 Jul 2026 00:00:00 GMTesp32hardwaredebuggingfirmwarehttps://kushalsharma.github.io/writing/two-heartbeats/https://kushalsharma.github.io/writing/two-heartbeats/A healthy link that dropped like clockwork, and a device that would happily retry a dead IP address forever. Two connection bugs where the fix was removing something, not adding it.Mon, 13 Jul 2026 00:00:00 GMTesp32debuggingwebsocketsnetworkinghttps://kushalsharma.github.io/writing/cad-by-conversation/https://kushalsharma.github.io/writing/cad-by-conversation/Modular WS2812B panels, designed by describing constraints instead of drawing them. The interesting part is which half of the design work actually transferred.Sat, 20 Jun 2026 00:00:00 GMThardwarecadai-agents3d-printingmcphttps://kushalsharma.github.io/writing/phoebe-needed-a-second-face/https://kushalsharma.github.io/writing/phoebe-needed-a-second-face/Phoebe runs on hardware in my house and I talk to it on Telegram. That is excellent from a train and slightly absurd from the chair in front of it.Sun, 14 Jun 2026 00:00:00 GMTai-agentsphoebetelegramself-hostedhttps://kushalsharma.github.io/writing/multimeter-and-an-agent/https://kushalsharma.github.io/writing/multimeter-and-an-agent/Four days, three power supplies, two motor drivers and one chip that turned out to be dead. The agent could run code on the robot. It could not see the robot. That division of labour turned out to be the whole trick.Thu, 14 May 2026 00:00:00 GMTroboticshardwareai-agentsraspberry-pihttps://kushalsharma.github.io/writing/openai-compatible-is-a-contract/https://kushalsharma.github.io/writing/openai-compatible-is-a-contract/I renamed an environment variable to the accurate name and it silently rerouted my traffic to another company. Four days of small breakages, and what they say about what compatibility actually means.Mon, 23 Mar 2026 00:00:00 GMTllmgatewayapi-designmumehttps://kushalsharma.github.io/writing/thirty-thousand-moving-objects/https://kushalsharma.github.io/writing/thirty-thousand-moving-objects/A long weekend spent putting every satellite and every aircraft on a 3D globe in a browser. The globe was the easy part. Everything after it was a fight for the main thread.Wed, 04 Mar 2026 00:00:00 GMTfrontendperformancewebgldatavizhttps://kushalsharma.github.io/writing/billing-after-the-answer/https://kushalsharma.github.io/writing/billing-after-the-answer/You cannot price an LLM call until after it has finished. That one fact decides the shape of every metering system you will ever build on top of one.Fri, 27 Feb 2026 00:00:00 GMTllmbillinginfrastructuremumehttps://kushalsharma.github.io/writing/cancelling-a-stream/https://kushalsharma.github.io/writing/cancelling-a-stream/The user closes the tab. Your server writes into a socket nobody is reading. The provider keeps generating, and keeps charging. Nothing errors, which is the problem.Wed, 25 Feb 2026 00:00:00 GMTllmstreaminginfrastructurebillinghttps://kushalsharma.github.io/writing/building-phoebe-pi-assistant/https://kushalsharma.github.io/writing/building-phoebe-pi-assistant/A Raspberry Pi 3 Model B with 906MB of RAM, an autonomous TypeScript agent with 855 runtime-loaded skills, and two days of unsupervised access to my GitHub org.Tue, 24 Feb 2026 00:00:00 GMTai-agentsraspberry-pitypescriptphoebehttps://kushalsharma.github.io/writing/stop-innovating-go-look/https://kushalsharma.github.io/writing/stop-innovating-go-look/The night Phoebe was built: one abandoned framework, one teardown, and the sentence that turned the evening around.Mon, 23 Feb 2026 00:00:00 GMTai-agentsphoeberaspberry-pitelegramhttps://kushalsharma.github.io/writing/ten-rounds-on-a-rounded-corner/https://kushalsharma.github.io/writing/ten-rounds-on-a-rounded-corner/An agent can write the CSS. It cannot look at the screen. That one asymmetry decides which parts of interface work go fast and which turn into a loop you have to break yourself.Wed, 18 Feb 2026 00:00:00 GMTdesignai-agentsfrontendmumehttps://kushalsharma.github.io/writing/gateway-nine-weeks-to-production/https://kushalsharma.github.io/writing/gateway-nine-weeks-to-production/The commit log of an LLM gateway going from nothing to production, and what the order of it says about which parts are actually hard.Fri, 13 Feb 2026 00:00:00 GMTllminfrastructuremumesolohttps://kushalsharma.github.io/writing/rate-limiting-an-llm-api/https://kushalsharma.github.io/writing/rate-limiting-an-llm-api/Requests are the wrong unit and everyone uses them anyway, including me. Here is why the right unit is so hard to enforce, and what to do until you can.Tue, 10 Feb 2026 00:00:00 GMTllmapiinfrastructuremumehttps://kushalsharma.github.io/writing/mume-ai-gateway-api/https://kushalsharma.github.io/writing/mume-ai-gateway-api/Point the OpenAI SDK at a different base URL and you have access to models from OpenAI, Anthropic, Google, Mistral and others — with per-user credits, quotas and billing behind it.Sat, 29 Nov 2025 00:00:00 GMTllmapiinfrastructuremumehttps://kushalsharma.github.io/writing/stable-diffusion-intro/https://kushalsharma.github.io/writing/stable-diffusion-intro/How diffusion models turn random noise into coherent images, and running the whole thing locally with ComfyUI.Mon, 29 Jan 2024 00:00:00 GMTgenerative-aistable-diffusioncomfyuihttps://kushalsharma.github.io/writing/kubeflow-for-ml-workflows/https://kushalsharma.github.io/writing/kubeflow-for-ml-workflows/What Kubeflow is, the pieces that matter, and why ML pipelines belong on Kubernetes.Mon, 20 Jan 2020 00:00:00 GMTkubeflowmlopskuberneteshttps://kushalsharma.github.io/writing/docker-basics/https://kushalsharma.github.io/writing/docker-basics/Moving Docker images between machines without a registry - pull, commit, save, load.Tue, 12 Feb 2019 00:00:00 GMTdockerdevopshttps://kushalsharma.github.io/writing/lstm-keras/https://kushalsharma.github.io/writing/lstm-keras/How LSTM cells actually work - forget, input and output gates - and a worked Keras example for predicting sequences.Sun, 23 Sep 2018 00:00:00 GMTmachine-learningkeraspythonhttps://kushalsharma.github.io/writing/hello-world/https://kushalsharma.github.io/writing/hello-world/The first post on this blog. Views expressed here are solely mine.Thu, 04 May 2017 00:00:00 GMTmeta