ŠTĚPÁN KESNER / LEAN AND PERSONAL SOFTWARE
Connecting Lean,
data and software.
At Magna, I worked on Lean, digital audits and savings reporting. I also build my own applications — some grow out of practical needs, others from exploring AI and 3D.
PERSONAL SOFTWARE PROJECTS
What I build.
And why.
From a tool for manufacturing walks to experiments with AI and 3D.
Each project has a story and a web demo to explore.
HomeHub●Good morning.A versatile assistant for every day.
◈ Model statusQwen3 1.7B (MLX)
✦New chat▤Documents✧Memory
Recent conversations
HomeHub
Web demoIn HomeHub, I bring a personal AI assistant together with my documents and conversations. It runs on iPhone and iPad, and I decide what it remembers.
Magic Camera●Capture the world
in 3DSpace. Depth. A new perspective.
in 3DSpace. Depth. A new perspective.
⬡Spatial ScanFrom a space to a 3D model.
⌂Room Plan◈Quick 3D
Magic Camera
Web demoI am exploring what I can build with a phone’s LiDAR: capturing a room or an object in 3D, editing the model and preparing it for further use.
gemba●Finding overview
N-001 / DEMOEvery finding has a next step.
✓✓3
Corrective action documentedReady for verification ↗
Gemba
Web demoGemba grew out of my work with mLean in manufacturing. In it, I connect findings from workplace walks with corrective actions and checks that the problem has been resolved.
h.HERMES / KANBAN●
TO DODefine deliverablesBrief · review
IN PROGRESSProduce the resultOwner · source
IN REVIEWVerify the artifactEvidence · decision
CLEAR BRIEFTRACEABLE RESULT ↗
Hermes + Kanban
Web demoI customised Hermes for my own video studio. Agents and scripts on one home computer prepare videos for six shows across five accounts. I approve finished episodes and publication.
LEAN · DIGITALISATION · SOFTWARE
Bringing Lean, digitalisation and software together.
At Magna, I worked on digitising Lean practices and reporting savings. My work ranged from configuring systems and connecting data to preparing materials and training colleagues. Working with mLean later led me to build Gemba.
Lean specialist
Magna Exteriors BohemiaAt Magna, I implemented digital audits and corrective actions in mLean and connected them with databases and reporting. As the person responsible for Ignite, I contributed to aligning savings tracking across the corporation.
How this led to Gemba ↗Full experience on LinkedIn ↗PROFESSIONAL PROJECTS
From factory experience to digital tools.
Magna · Savings reporting
Project Ignite
Ignite aligned how Magna tracked and reported savings across the corporation. As the person responsible for the project, I brought process design together with reporting and data entry.
- I co-designed the path from an idea and its A3 documentation through approval to regular project tracking, building on plant standards and Ignite requirements.
- I designed the solution in use with Power BI reporting built on the Ignite database and connected Power Apps; the shared report also included supplementary notes held separately in Microsoft Lists.
- I prepared materials and presentations and trained people to use the solution; my design also included automated reports.
Magna · Lean digitalisation
mLean
Implementing mLean meant bringing the plant's Lean procedures into a digital environment. My work extended from configuration and data integration to reporting, training and ongoing maintenance.
- I implemented 5S and LPA audits, safety and quality audits, gemba walks and corrective actions in mLean, connecting the digital environment with established plant procedures.
- I configured the system, prepared visualisations and reports and handled all database connections within the solution.
- I created materials and presentations, trained users and maintained the system; the experience of using it led me to design Gemba.
Magna · Toyota team project
SMED at our plant
At the plant where I worked, I took part in a Toyota team SMED project. I contributed preparation and support to the work on shortening die changes.
- I helped prepare and support the Toyota team's SMED project at our plant.
- The team's work included changes to the die-change procedure and how responsibilities were allocated among the people involved.
- The team's changes cut the die-change time by approximately 20 minutes.
Workshops and other Lean projects
Makigami · Materials and production planning
Magna · 3 days
During a three-day corporate workshop at Magna, I worked with colleagues from other divisions to optimise material ordering and production planning.
SMED · Press die change
Cosma Formpol · 3 days
At Cosma Formpol, I attended a three-day practical SMED workshop. The team worked on speeding up die changes on a sheet-metal press.
ICG · Value stream
Week-long training
The week-long ICG Value stream training included work on an assembly line for vehicle conversions. Our shared task was to find ways to speed up its flow.
Summer Lean Academy
Week-long training
I attended the Summer Lean Academy, a week-long Lean training programme.
Manufacturing processes
I worked with 5S, LPA, safety and quality audits, gemba walks and corrective actions. SMED and Makigami workshops also helped me develop my experience with manufacturing processes.
Digitalisation in practice
I connected Lean procedures with databases, visualisations and reports, using Power BI, data entry in Power Apps and supplementary records in Microsoft Lists.
Helping people use the tools
I prepared supporting materials, training presentations and A3 documents. I trained people to use the tools and continued maintaining the solutions after implementation.
Earlier experience
Changhong Europe Electric
Invoicing and order processingI worked on invoicing, accounting and administration, including processing orders in business systems.
Smarty CZ / iWant
Sales and customer adviceAt the iWant store, I advised customers and delivered training.
Komerční banka
Client and administrative supportI supported a mortgage specialist, handled banking administration and worked with loan documentation.
Vibracoustic CZ
Quality administration supportI supported the quality team with manufacturing claims and worked with project documentation in SAP.
HOW I APPROACH PROJECTS
Experience, experimentation
and verifiable results.
Start with a real need.
Gemba grew out of my experience with Lean manufacturing and implementing and using mLean. I wanted a tool that supported my own way of working.
Explore what technology can do.
HomeHub and Magic Camera explore local AI and spatial capture. I connect technical experiments with something I can use myself.
Ask what the result actually proves.
For experiments, I save measurements and the conditions behind them. In Hermes, I refine briefs, handoffs and checks on specific deliverables.
MORE PERSONAL PROJECTS
Smaller projects.
The same approach.
iOS · Colony simulationGame core in development
Endless Frontier
In Endless Frontier, I am building a colony simulation with resource management and technological progression. The world also catches up with the time the app has been closed.
- The game core is a standalone Swift package without a UI. It contains 1,622 tests that can be run with swift test without a simulator.
- The world catches up based on elapsed time when the app opens. The same seed produces the same world.
- Buildings, technologies and events are JSON data. Save-game migration is prepared in advance.
Tool · Claude Code pluginVersion 0.12 · Used daily
docs-forge
I gradually turned the way I manage documentation into a Claude Code plugin. I use it to check links, keep track of projects and hand over ongoing work.
- The plugin brings together 7 workflows and 14 commands for checking documentation, reviewing project status and handing over work.
- A findings register with derived status. A check fails the build if a new rule exists only in prose.
- The standard grew from practices shared across Gemba, HomeHub and Endless Frontier. Adapters for Cursor and Codex.
Offline · Knowledge bundleWorking build
Survival Hub
I am building Survival Hub as a guide I can read without an internet connection or print out. One source produces versions for a browser, iOS and paper.
- Markdown produces HTML for any browser, a SQLite index for the iOS app and a printable PDF.
- The build runs in plain Python with no external dependencies.
- A parity check verifies that HTML and SQLite return the same results for the same query.
SMALLER PERSONAL PROJECT / OFFLINE LIBRARY
View project ↗Grunt
Grunt is my offline library of practical homestead reference material. It helps me find a specific passage in a book, while the Workshop keeps my own instructions, notes and photographs close at hand.
EARLIER RESEARCH / SEPTEMBER 2026
Explore the measurements ↗Local Agent Router
Before moving to Hermes, I explored how to choose a local AI model for a task and work within the computer’s memory limits. These are the results of those experiments. I now run tasks in Hermes with Kanban.