18 projects
Interactive trade terms, responsibility maps, and cost scenarios for clearer supply-chain decisions.
Making trade terms easier to understand.
A public research tool that turns Incoterms into interactive responsibility maps, cost simulations, and lab notes about supply-chain improvement in Indonesia.
Interactive trade terms, responsibility maps, and cost scenarios for clearer supply-chain decisions.
A modern workspace for job visibility, document preparation, and cost review around an established ERP.
An established ERP. A clearer way to work.
The ERP keeps the records; the friction was in the daily work around it, where old and newer tools did not line up. This private workspace sits beside the ERP, where a job's status, its documents, and its costs are handled in one flow.
A modern workspace for job visibility, document preparation, and cost review around an established ERP.
Turn unstructured messages into suggested fields and follow-up tasks, with human review for uncertain cases.
From a message to a useful next step.
Requests arrive as free-form messages with no fixed structure. This private intake layer reads them first, suggests the fields and the next task, and leaves anything it is unsure about for a person to check.
Turn unstructured messages into suggested fields and follow-up tasks, with human review for uncertain cases.
A 3D office dashboard for viewing worker activity, sessions, and coding-agent projects in one building.
Open demoAn interactive 3D demo with sample data you can try directly below. Watch worker avatars in action, switch activity filters, and open the project inspector.
Interactive demo · sample data. Try it right here.
View result preview (opens in a new tab)A personal tool with a 3D floorplan, one avatar per worker, a project list, tool filters, and an inspector. Recorded activity shows the context of the work, but an avatar's position does not mean a task is finished.
A 3D office dashboard for viewing worker activity, sessions, and coding-agent projects in one building.
Open demoConnect legacy records to modern tools, with synchronization checks and separate recovery planning.
Operational records live in a legacy system that newer tools cannot use directly. This layer connects them one piece at a time: it checks that both sides still match after each sync, verifies the backups, and keeps written recovery steps for when something breaks.
Connect legacy records to modern tools, with synchronization checks and separate recovery planning.
A personal lab for research notes, AI experiments, and supply-chain topics, published openly at ggcd.tech.
Live site screenshot. Open ggcd.tech to read the full lab notes and try the interactive background.
View result preview (opens in a new tab)An open lab site with an interactive 3D hero and lab notes grouped by topic: AI workflow, operations, data systems, and logistics, complete with research references.
A personal lab for research notes, AI experiments, and supply-chain topics, published openly at ggcd.tech.
Bounded AI assistance for research, implementation, extraction, and review, with people checking the output.
Building and evaluating role-specific AI assistance for research, implementation, document extraction, and review, using leading frontier and open-source models.
Bounded AI assistance for research, implementation, extraction, and review, with people checking the output.
A private lab for studying how shipped apps work from their artifacts, with a note of evidence behind every claim.
Illustrative preview. Private study notes and lab files; there is no public demo or download.
A private knowledge base and case lab for agent-assisted reverse engineering with REA. Each case starts from a shipped artifact such as an Electron app, a binary, or a saved capture, then records what was observed, what is inferred, and what is still unknown. Target files stay local and out of version control. The aim is to understand behavior well enough to design an original version, not to copy code.
A private lab for studying how shipped apps work from their artifacts, with a note of evidence behind every claim.
Papers, evals, retrieval tests, and model notes that turn self-taught learning into reusable judgment.
A private study system for papers, lectures, eval notes, model behavior, retrieval tests, and model limitations.
Papers, evals, retrieval tests, and model notes that turn self-taught learning into reusable judgment.
A personal hobby: learning Harley-Davidson engines through 3D visuals, Engine School, DTC lookup, and a two-bike comparison.
Preview websiteA personal hobby project. This is a sample screenshot of the website, which is still under development. Open the preview to explore the engine and lessons; the comparison uses sample assumptions and the code lookup does not read the motorcycle ECU.
View result preview (opens in a new tab)A hobby project exploring engine generations, component motion, drivetrain, carburetors, and EFI. Engine School and the code lookup provide learning context, while the simulator compares two bikes using adjustable assumptions.
A personal hobby: learning Harley-Davidson engines through 3D visuals, Engine School, DTC lookup, and a two-bike comparison.
Preview websiteAn Indonesian-language adaptation of the Pi terminal UI, with a concise spinner, Git status, cache timer, and tool renderer.
Open demoA UI simulation with sample data. Open the preview to try the spinner, tool renderer, and cache timer.
View result preview (opens in a new tab)An Indonesian-language terminal interface with concise verbs, labels, and activity status. The browser demo shows the spinner, tool renderer, and cache timer.
An Indonesian-language adaptation of the Pi terminal UI, with a concise spinner, Git status, cache timer, and tool renderer.
Open demoEditorial websites for personal identity, lab notes, and safe supply-chain and AI writing.
A small set of editorial public sites for personal identity, lab notes, and safe supply-chain/AI writing.
Editorial websites for personal identity, lab notes, and safe supply-chain and AI writing.
A 3D browser pinball experiment: neon table, flippers, bumpers, and multiball.
Play demoLive demo screenshot. Open the preview to try the flipper controls and ball launcher.
View result preview (opens in a new tab)A 3D arcade project with custom physics and synthesized audio. The browser demo shows an experimental playtable build with flipper controls and a ball launcher.
A 3D browser pinball experiment: neon table, flippers, bumpers, and multiball.
Play demoTetris with YOU/BOT modes, player profiles, and high scores, built for the terminal and the browser.
Play demoLive demo screenshot. Open the preview to play YOU/BOT modes and check the high scores.
View result preview (opens in a new tab)A small just-for-fun learning game. The terminal version runs on the command line, while the browser version is growing into a web app you can install as a PWA.
Tetris with YOU/BOT modes, player profiles, and high scores, built for the terminal and the browser.
Play demoA 3D driving simulation with manual and autopilot modes, routes, traffic, and automatic parking.
Play demoLive demo screenshot. Open the preview to drive manually or watch the autopilot follow the route.
View result preview (opens in a new tab)A vehicle and decision-making experiment in a road environment. The web version runs the planner in a web worker with a route interface and vehicle controls.
A 3D driving simulation with manual and autopilot modes, routes, traffic, and automatic parking.
Play demoA browser arcade with Shih Tzu and dachshund characters, built as a personal game.
Play demoLive demo screenshot. Open the preview to try the timing and one-input controls.
View result preview (opens in a new tab)An arcade experiment with two dog characters, obstacles, and simple controls. Open the preview to try input response and game timing.
A browser arcade with Shih Tzu and dachshund characters, built as a personal game.
Play demoA browser Pong arcade with solo mode, local versus, and responsive controls.
Play demoLive demo screenshot. Open the preview to play solo against the CPU or in local versus mode.
View result preview (opens in a new tab)An arcade project exploring ball bounce, paddle control, and scoring. The browser demo is playable solo or in local versus mode.
A browser Pong arcade with solo mode, local versus, and responsive controls.
Play demoRetro handheld-style Snake with speed options and touch controls.
Play demoLive demo screenshot. Open the preview to try speed modes and touch controls.
View result preview (opens in a new tab)A Snake experiment for the browser with a responsive layout. The preview offers speed options, direction controls, and a retro handheld feel.
Retro handheld-style Snake with speed options and touch controls.
Play demoGeralcus R&D Lab
My personal lab for side projects, supply chain experiments, and applied AI. I share what I build and learn at ggcd.tech.
A workflow, thoughtfully renewed
Records and forms from a legacy VB6 system can connect to a modern workflow without discarding the knowledge behind them. This illustration keeps source references and human judgment in the loop.
Illustrative document
Explore a stageAn ambiguous document stays flagged. AI assistance does not clear the approval gate.
Keep the original records, forms, and business context close. The operational system remains the source while a modern workflow takes shape around it.
Operations · Workflow analysis
Adjust volume, effort, and adoption to compare two workflows. Human review and corrections stay included.
Illustrative scenario. These editable assumptions are not measured results from my projects.
Balanced example · per month
Current effort
200h / month
400 documents · 30 min each
Modeled effort
125h / month
75% adoption · review included
Capacity released
75h / month
37.5% less handling time
Same volume · hours per month
Where the modeled time goes
Current scenario 75% adoption75 h / month
Share using the new workflow
Static example. The five modeled values remain visible.
Time released is capacity, not automatically cash saved. Assign a value to that time and account for added running costs.
At these assumptions, 80 documents / month cover the running costs in modeled time value. This is not cash ROI; actual savings require avoided spend. Monthly running costs are held fixed as volume changes. Ongoing maintenance time and one-off migration, training and financing costs are excluded.
Compare the same document types before and after, across representative working days. Track hands-on minutes, end-to-end turnaround and first-pass accuracy together. A faster draft only helps if the review and final delivery are better too.
The calculation: documents × adoption share × (current minutes − new minutes) ÷ 60 = hours released per month. Unchanged work retains its original time; negative results stay visible.
For an actual case study, report the sample size, period and variation alongside the result. Check exception rates, staff adoption and restore-test results separately. This calculator estimates active effort, not elapsed delivery time or a statistical confidence interval.
Research context, not a personal result. A 2025 QJE study (opens in a new tab) of 5,172 customer-support agents found 15% more issues resolved per hour on average with AI assistance. That is a different task and a throughput measure, not a cost-saving rate. METR’s 2026 update (opens in a new tab) explains why selection effects and concurrent agents complicate developer-productivity measurement. Neither study supplies the assumptions above; each workflow needs its own evidence.
Based in Jakarta. CV shared directly by email on request.
