BeginnerAI in production
Why search finds the subject but misses the point
A café for a conversation. An old draft without disturbing today’s work. A few words change what makes a search result useful. Reranking gives them a closer look.
AI in production. Reliability in practice.
Latest edition ·The cover story
BeginnerKV cache: where a growing conversation takes up memory
A language model keeps working notes as it writes. Follow those notes through a growing conversation to understand why loading a model and serving several people are different memory questions.
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The latest articles
BeginnerAI in production
How a voice note becomes words on a screen
A recording contains sound, not a hidden text file. Whisper turns that sound into a representation a model can use, then builds a transcript piece by piece. The task you choose helps determine what those words should be.
BeginnerAI in production
MCP: getting the missing records into the conversation
The assistant has your question. The release system has the answer. Follow how MCP connects the two, from a request for records to an explanation you can trace.
BeginnerAI in production
Model quantization: making room by changing the numbers
A four-bit model can fit where a larger copy will not. Follow one rounded weight into the calculations, memory and support cases that determine whether it helps.
BeginnerAI in production
A local AI model, a private manuscript and the connections between them
The model can answer on your laptop while another part of the app sends a page elsewhere. Follow one manuscript through document reading, web research and saved copies to choose the connections you actually want.
IntermediateIncident response
PHP2Shell: following the risk into the running worker
A PHP site can serve a healthy-looking page while its worker remains exposed. Separate the runtime fixes, the worker’s reach and the investigation into what happened before repair.
Worth understanding
A clearer picture of AI
Explainer
AI history: from writing the rules to learning the task
Rules, examples, prompts and reasoning changed the work we ask computers to do. The older choices still have jobs worth doing.
Guide
T3 Code: keeping track of the agent, the branch and the actual fix
A promising answer is easier to review when you can find the files behind it. Follow one small repair through T3 Code’s sessions, worktrees and host machines.
Explainer
Building an assistant that can keep its place with Eve
An engineer asks about slow checkout. The assistant investigates, then waits for approval. Eve supplies the continuing conversation and tool machinery; your team still defines the job.
Reliability in practice
Production notes
Incidents, on-call work, and the decisions behind reliable systems.
BeginnerIncident response
What MTTD misses
Separate detection from response and find delays that an improving average can conceal.
Guide
The backup fix worked. The older format still needs an answer.
A cleanup can improve backups without settling every configuration. A risk registry lets the tested improvement stand while someone takes responsibility for what remains.
Guide
The on-call calendar improved. Who is still awake?
Fewer primary shifts can still leave the same specialist answering the phone. Follow the interruptions, shared effort and next-day repairs before calling the workload lighter.
Put it to work
Tools for the job in front of you
Reconstruct the response
Put incident timestamps in order and examine the intervals between failure, detection, investigation, and recovery.
Build a timelineGive the next responder a head start
Turn a known failure into a procedure with scope, actions, escalation, and recovery checks.
Build a runbookFollow the fix through
Track corrective actions alongside verification criteria and the risk that remains.
Track an actionStart learning
Start with a question. Build from there.
AI basics · 10 lessons available
What happens between a prompt and an answer?
Understand what happens between a prompt and an answer, learn how to check the result, and build a small document assistant that shows its evidence.
10 lessons ready, with practical exercises throughout.
Explore AI basicsLinux basics · 13 lessons available
Get comfortable at the command line.
Learn to operate a Linux system by building, running and troubleshooting a small service in a disposable practice environment.
13 lessons ready, with practical exercises throughout.
Explore Linux basics