TL;DR
Thorsten Meyer AI has published a Day 7 Built in Public dispatch on Threlmark, an MIT-licensed roadmap and scored kanban tool built around a plain JSON file on a user’s disk. The source presents the file as the integration contract for humans, tools and agents, while warning that agent-written changes still need review.
Thorsten Meyer AI has detailed Threlmark, an MIT-licensed roadmap and scored kanban tool built around a plain JSON file stored on a user’s disk, a design choice the project describes as making the file itself the contract between the app, external tools and automated agents.
The Day 7 Built in Public dispatch says Threlmark’s board is a view over roadmap.json, with roadmap items arranged across backlog, scored, doing and done states. According to the source material, the product is available at threlmark.com and is open source under the MIT license.
The central claim in the dispatch is that Threlmark avoids making a vendor database or API the home of a user’s planning data. The source says tools and agents can read and write the same JSON file directly, with no SaaS API, rate limit or vendor-specific SDK required.
The article also frames Threlmark as part of a wider “operator portfolio” and specifically connects it to IdeaClyst, saying council verdicts from IdeaClyst can become scored roadmap items in Threlmark. That link is presented by Thorsten Meyer AI as the move from decision-making to an ordered plan.
Threlmark — disk is the contract
The roadmap is a plain JSON file on your disk. The board is just a view over it — and your tools and your agents read and write the same file directly.
Independent commentary, produced with AI assistance under human editorial oversight. The views are the author’s own and may change. Threlmark is open source under MIT, provided “as is” without warranty; see the repository LICENSE. Automated agents that read and write the roadmap file may introduce errors — treat agent writes as changes to review, not facts to trust. Product and company names are trademarks of their respective owners; mention does not imply endorsement.
Local Files Replace Vendor APIs
For readers who use roadmap software, the announcement matters because Threlmark is making a different bet from cloud-first planning tools: the roadmap data is meant to remain readable outside the application that displays it. If the format is stable, a plain JSON file can be opened, versioned, backed up and inspected with common tools.
That approach could appeal to teams working with local-first systems, agent workflows or long-lived operational records. It also shifts responsibility back to the user: the same openness that lets agents write to the file means users need review practices, backups and change control around the roadmap.
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Day Seven In Product Series
The dispatch is labeled Built in Public Day 7 of 19 and places Threlmark inside a broader set of 18 products. The source describes the shared foundation as local-first and provider-agnostic, meaning tools are intended to work without depending on a single model provider, platform or hosted database.
Within that portfolio, Threlmark is positioned as the planning layer. IdeaClyst is described as producing verdicts, while Threlmark is where those verdicts become ranked work items. The source says scoring is meant to force prioritization by making each item carry a visible priority score.
“disk is the contract”
— Thorsten Meyer AI dispatch
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Release Details Still Limited
The source material does not specify the exact publication date, current version number, repository URL, installation process, contributor activity or production-readiness status. It also does not provide independent usage data or third-party verification of adoption.
Several benefits described in the dispatch are the author’s claims about the design. The source says the file-based approach reduces lock-in and makes agent access easier, but details such as schema stability, conflict handling, file corruption safeguards and multi-user workflows are not established in the provided material.
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Repository And Schema To Watch
The next developments to watch are the public repository, the JSON schema and any examples showing how agents safely modify roadmap items. Readers evaluating Threlmark should look for documentation on backups, validation, version control and review steps for automated changes.
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Key Questions
What is Threlmark?
Threlmark is described by Thorsten Meyer AI as an open-source roadmap and scored kanban tool. Its roadmap data lives in a local JSON file rather than inside a hosted database.
What does “disk is the contract” mean?
It means the file on disk is the shared integration point. The app, other tools and agents are meant to read and write the same structured JSON file.
Is Threlmark a SaaS product?
The source says there is no SaaS API for the roadmap contract. It presents Threlmark as local-first, with the roadmap stored as a plain file owned by the user.
Is it safe for agents to write to the roadmap file?
The source warns that automated agents may introduce errors and says agent writes should be treated as changes to review. That means users should keep backups and use review controls before trusting automated edits.
What remains unknown about Threlmark?
The provided material does not confirm the exact release date, current version, schema details, installation steps, user adoption or how the tool handles conflicts when multiple systems edit the file.
Source: Thorsten Meyer AI
