🔍 Read the full analysis: How Gewerkton Used AI Agents To Rebuild Its Look In Two Days on ThorstenMeyerAI.com

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Gewerkton, a construction-site documentation tool built in Bavaria, says it replaced the look of its web and phone apps, Studio, icons and multilingual website over Oct. 2 and 3, 2026, using AI coding agents to carry out implementation from written plans. The publisher’s account, the original analysis, says founder Thorsten Meyer approved the plans, reviewed results and released each part, making the project a case study in both the speed and limits of agent-led software work.

The redesign, named HORIZON, covered the web app, iPhone and Android apps, Studio, all 26 icons and a website comprising 529 pages in 40 languages. Gewerkton says it moved 281 hard-coded web-app colour values into design tokens, restyled 47 cards and released phone-app version 0.5.0 in the new look. The website received a new opening section featuring product screens, and 1,583 files were uploaded without an error, according to the company.

The two-day description applies to execution, not the start of design: an interim draft existed on Sept. 26. Meyer’s account says the agents worked in a separate copy of the code on their own branch. Work was not merged or released until he approved it. Videos showing the apps were held until he had reviewed the new interface, and paid film reruns also required his explicit approval.

Gewerkton reports that the phone app passed 853 of 853 tests, Studio passed 2,158 of 2,158, and the website passed all seven test suites. The web app was checked across 200 views in four languages, three screen widths and light and dark modes. Its test suite still had eight failures in seven files; the company says six also failed on the main branch, while another passed when run alone. Those failures were not fixed by the redesign.

What Agent-Led Delivery Required

The account offers a practical example of AI agents doing implementation work across several connected products, while humans retain control over design decisions, release gates and paid actions. Rather than asking an agent to make open-ended design choices, Gewerkton says it first documented unresolved decisions with options and recommendations. Meyer approved the plan, then reviewed results at each release stage.

The work also shows why a fast implementation is not the same as an unattended one. Automated tests caught some software failures, but they did not flag the first icon design’s dark-mode problem. People found that white tiles behind icons obscured nearby labels, and a visual review of generated films caught recolouring errors that the automated mask missed. The reported process depended on human inspection alongside automated checks, not on the agents alone.

For other teams considering similar workflows, the account is useful as a specific operational example, not independent evidence that comparable projects will take two days. Gewerkton is built by the publisher, which disclosed that relationship. The reported speed and test results are therefore the company’s own account, and readers do not have an external audit or a comparison with a conventional redesign in the supplied material.

A Draft Preceded the Relaunch

Gewerkton is described by its publisher as a construction-site documentation tool developed in Iffeldorf, Bavaria, by Thorsten Meyer, who directs AI coding agents including Codex and Claude. The redesign changed the brand palette as well as the interface: cobalt and navy replaced red as the principal colours, and all 26 icons were rendered in Blender.

The phrase “in two days” has a defined limit. A draft of the look dated Sept. 26 was already available; the Oct. 2-3 period covered implementation from an approved plan through the live website. One design adjustment was made after checking contrast: the planned cobalt measured 4.38:1 against a light background, below Gewerkton’s stated 4.5:1 working standard for WCAG 2.1 AA. The company says it darkened the colour to reach 4.80:1.

The project also involved 228 AI film runs across five regions, including 222 regional versions, plus eight help videos. Gewerkton says production paused after the ninth round when 38% of jobs were failing; 208 of 228 runs had been completed at that point. The 76 failed jobs were not billed, according to the account.

“The two days cover the execution, from the approved plan to the live website.”

— Thorsten Meyer, Gewerkton founder, in the publisher’s project account

Costs and Follow-Up Remain Open

The supplied account cuts off while introducing the film project’s cost, saying records show “about 134 dollars actual” without completing the figure or specifying the full cost basis. It is therefore unclear whether that amount covers all film work, a particular subset of runs, or another defined expense. No total cost for the wider redesign is provided.

The account does not include an independent review of the claimed schedule, test results, upload count or production figures. It also does not say how the redesign has affected users, whether the remaining web-app test failures will be addressed, or whether the temporary use of European film cuts in some regional versions has ended. The publisher’s disclosure that it builds Gewerkton itself should be considered when interpreting its account.

Some issues were reported as corrected or scheduled for follow-up, but the material does not provide independent confirmation of those outcomes. The Android camera-screen problem was found during testing on a Pixel 10a; the account says five major findings were identified and none was a blocker, but it does not describe all five in detail.

Android Fixes Are Planned

Gewerkton says the five major findings from its Android test are scheduled for version 0.5.1. One example was camera-screen buttons whose larger type and padding caused text to break mid-word; the German cancel label wrapped onto two lines. The company did not provide a release date for the update.

The account also says Meyer approved nine film reruns after leftover red appeared in regional versions, and those reruns passed visual review. It does not give a timeline for resolving all remaining regional-film substitutions or for addressing the existing web-app test failures. Further updates on the Android patch, film versions and complete project costs would clarify what remains after the two-day implementation.

Key Questions

What did Gewerkton change?

Gewerkton says its HORIZON redesign covered the web app, iPhone and Android apps, Studio, 26 icons and a 529-page website in 40 languages.

Did the design start from scratch on Oct. 2?

No. The company says an interim design draft dated Sept. 26 was carried into the work. Oct. 2-3 refers to implementation from the approved plan through the live website.

Did AI agents complete the work without human review?

No. According to Gewerkton, the agents implemented work from written plans, while Thorsten Meyer approved the plans, checked results and released each part. Some video work and paid reruns also required his approval.

What problems did the redesign uncover?

The account describes icons that obscured labels in dark mode, film recolouring errors that automated checks missed, failed film jobs and an Android camera-screen layout bug. Gewerkton says visual review and subsequent corrections addressed some issues; Android findings are scheduled for version 0.5.1.

How much did the redesign cost?

The source material begins to give an actual film-project cost of about $134 but is incomplete and does not state the full cost basis. It provides no total cost for the overall redesign.

Source: ThorstenMeyerAI.com