TL;DR
Thorsten Meyer AI’s Day 7 built-in-public dispatch presents Threlmark as an MIT-licensed roadmap tool built around a local JSON file rather than a hosted database. The confirmed claim is architectural: the kanban board, external tools and agents read and write the same roadmap file, while agent edits still require human review.
Threlmark, an MIT-licensed open-source roadmap tool from Thorsten Meyer AI, is being presented around a single product decision: the roadmap is stored as a plain JSON file on the user’s own disk, making the file itself the shared contract for the board, other tools and automated agents.
The Day 7 dispatch describes Threlmark as a scored kanban system in which the visual board is “just a view” over a local roadmap file. According to the source material, items can sit in columns such as backlog, doing and done, while each item carries a priority score so the roadmap is ranked rather than treated as a flat list of tasks.
The project’s stated position is that a known JSON structure can replace a hosted service API as the main integration point. The dispatch says any program that can read JSON can read the roadmap, and any program that can write valid JSON can update it. That makes the roadmap accessible to local tools and agents without an SDK, hosted account, rate limit or vendor-specific database.
The source material also places Threlmark inside Thorsten Meyer AI’s wider “Decision Layer” series. In that setup, verdicts from IdeaClyst, another product in the portfolio, are described as flowing into Threlmark as scored roadmap items. The company frames the connection as “IdeaClyst → Threlmark”: one tool helps decide what is worth doing, and Threlmark turns those decisions into 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.
Roadmap Data Moves Local
The announcement matters for readers who depend on roadmap tools because it challenges a common software pattern: keeping planning data inside a vendor-controlled database and exposing it through that vendor’s API. Threlmark’s design instead treats the roadmap file as the durable artifact. If the tool changes, fails or is replaced, the plan remains available as a text file that other software can parse.
That approach may appeal to builders using AI agents in their workflow. The dispatch argues that agents and humans can share the same workspace by reading from and writing to the same file. That could make automated planning loops easier to inspect because changes land in a file rather than inside an opaque service.
The scored-kanban model also addresses a separate planning problem: priority inflation. By assigning each item a score, Threlmark is meant to force comparison between tasks. The source material says a board where everything is “high priority” has no real priorities; a ranked file-based board makes trade-offs visible.
JSON file viewer for project management
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Day 7 In The Product Series
Threlmark is introduced in the source material as part of a 19-day “Built in Public” sequence from ThorstenMeyerAI.com. The Day 7 entry focuses less on a new interface feature and more on the underlying storage contract: one roadmap file, stored locally, shared by the user interface, external tools and agents.
The dispatch describes the product as local-first and provider-agnostic. In practical terms, that means the roadmap is not tied to a particular hosted planning service, model provider or automation vendor, at least according to the stated design. The project is also described as open source under the MIT license and provided “as is” without warranty.
The article also situates Threlmark among 18 products in what the source calls an “operator constellation.” Only the immediate relationship with IdeaClyst is needed to understand this update: IdeaClyst is presented as producing decisions or verdicts, while Threlmark is presented as the place where those verdicts become ranked roadmap work.
“disk is the contract”
— Thorsten Meyer AI Day 7 dispatch
local JSON roadmap tool
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Adoption And Safeguards Still Open
The source material does not provide usage numbers, release milestones, repository activity, contributor counts or independent adoption data. It also does not specify how Threlmark handles concurrent edits, file conflicts, schema migrations, validation failures or recovery from malformed JSON.
It is also not clear from the supplied material how the tool prevents an automated agent from overwriting user changes or introducing flawed roadmap entries. The project’s own disclaimer says agent writes should be reviewed, which means the agent workflow is presented as a capability, not as a guarantee of correctness.
The long-term durability claim is also partly conditional. A plain JSON file is broadly portable, but future compatibility depends on the stability and documentation of Threlmark’s file shape. The supplied material describes the thesis but does not include the full schema or a formal compatibility policy.
Kanban board software with JSON import
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Next Test Is Real Use
The next step is whether Threlmark’s file-first model proves useful in live workflows where humans, importers and agents all touch the same roadmap. Readers should watch for the public repository details, schema documentation, examples of agent edits, and evidence that the scored kanban flow works beyond the built-in-public demo.
Future dispatches in the 19-day series may also clarify how Threlmark fits with the rest of the portfolio and whether the roadmap file becomes a shared foundation for more products. For now, the confirmed development is the product’s design stance: Threlmark treats the local JSON roadmap file as the primary contract.
Program Management for Open Source Projects: How to Guide Your Community-Driven, Open Source Project
As an affiliate, we earn on qualifying purchases.
As an affiliate, we earn on qualifying purchases.
Key Questions
What did Threlmark announce?
Thorsten Meyer AI’s Day 7 dispatch announced Threlmark’s core design: a roadmap tool where the plan lives in a local JSON file, with the kanban board and automation tools reading and writing that file.
Is Threlmark open source?
Yes. The supplied source material says Threlmark is open source under the MIT license and is provided “as is” without warranty.
What does “disk is the contract” mean?
It means the roadmap file itself is the integration point. Instead of relying on a hosted API as the source of truth, Threlmark uses a known JSON file format that local tools and agents can read or update.
How is Threlmark different from a normal kanban board?
The source material says Threlmark is a scored kanban board. Each item carries a priority score, so the board is meant to show ranked trade-offs rather than a list of tasks that all claim equal priority.
Can AI agents safely edit the roadmap?
The dispatch says agents can read and write the roadmap file, but it also warns that automated edits may contain errors. Agent-written changes should be reviewed by a human before being treated as reliable.
Source: Thorsten Meyer AI
