Independent product studio
Software engineering, AWS cloud security, AI, DevOps and regulatory technology by D. Klincharski.
Explore by topic
Playable security lab
Cloud Siege turns cloud-security trade-offs into a six-round Red versus Blue card battle. Explore how attack paths combine, where defensive controls break the chain, and why layered protection matters—solo or against another player.
Fully designed and developed by Mr.D.
Play Control Plane Clash01 / Mr.D Apps
From everyday services to regulated and cloud work, each product starts with a clear problem worth solving.
Find verified local help and book trusted skills with clear pricing.
HandyHive connects customers with verified professionals, students, and skilled neighbours for everyday services. Search, scheduling, transparent pricing, verified reviews, and secure payment replace the uncertainty of finding help through disconnected listings.
Turn scattered regulatory information into traceable working intelligence.
RafiHive helps regulatory teams find, organize, and work with changing requirements without losing the source behind an answer. Regulatory affairs specialists shape the workflows alongside engineers, making domain expertise part of the product rather than an AI afterthought.
Turn cloud evidence, controls, and risk into structured compliance work.
ScanComb brings cloud findings, controls, supporting evidence, and risk into one structured compliance workflow. It reduces spreadsheet-driven evidence collection and makes gaps easier to understand, prioritize, and prepare for review.
Attack or defend a cloud control plane in a six-round security card battle.
Control Plane Clash turns cloud-security decisions into a tactical Red versus Blue game. Play against the computer or invite another player, combine attack paths and defensive controls, and protect Crown Integrity.
02 / Open source
A selected set of utilities for faster, clearer engineering and cloud operations.
Bootstrap consistent Windows and macOS engineering workstations.
DevOps Setup installs or updates consistent workstation profiles on macOS and Windows from one maintained package list per platform. It reduces manual onboarding and configuration drift across developer, cloud, container, infrastructure, and security tooling.
Set up and measure token-efficient AI coding workflows.
AITO configures a token-efficient workflow for GitHub Copilot and Claude Code, then measures the result instead of promising an invented saving. It reduces repeated repository reading, oversized build output, and session-by-session setup without replacing the project’s own tools.
A practical AWS reference stack for containers, storage, and data.
This ready-to-fork Terraform starter wires ECS Fargate, an application load balancer, ECR, EFS, and optional CloudFront and PostgreSQL together with sensible defaults. It gives small container projects a coherent AWS baseline without rebuilding the infrastructure relationships.
Rank AWS cost opportunities by the money they can actually save.
CostHive brings several open-source FinOps tools behind one read-only AWS scan and produces a consolidated, dollar-ranked report. It replaces scattered dashboards with a prioritized list of actions, estimated monthly savings, and confidence levels.
Produce evidence-grade AWS security reports from trusted scanners.
SentryHive runs established AWS security scanners through one read-only command and normalizes their findings. Consultants and auditors get one traceable, client-ready HTML, PDF, Markdown, or JSON report instead of reconciling several toolchains and output formats.
See the health of selected GitHub Actions pipelines in one place.
PipelineHive turns the latest GitHub Actions runs for selected repositories, branches, and workflows into one status dashboard. Stage-level indicators link directly to failed jobs and steps, making pipeline problems faster to find.
03 / Journal
Stories behind the apps—why they exist, the decisions that shaped them, and what we learned while building them.
Infracost, Komiser, Cloud Custodian and OpenCost, run against the same account. Each found something the others could not see, and all four shared the same blind spots.
04 / The brand
Mr.D is an independent product studio building focused products for real problems—combining engineering, domain expertise, and an open-source mindset.
