MijnSpel

By Xafron B.V.

Overview

MijnSpel helps board game designers create and refine playable prototypes in Creator or Studio, validate project files, preview gameplay, run balance simulations, compare results, and publish a confirmed project to the web.

Tools

answer_question

ChatGPT

Submit the user's answer from the Codex or ChatGPT conversation. Stable option ids are authoritative; the first accepted answer wins.

call_operation

ChatGPT

Stable compatibility entry point for current MijnSpel operations. First call operation=discover_operations to obtain the live operation names and argument schemas, then invoke any returned non-UI operation without depending on a refreshed static tool snapshot. Prefer the direct present_question tool when showing its interactive UI.

close_project

ChatGPT

Release an active external work lease without applying files or advancing a Creator phase. Always call this after post-apply inspection, simulation, or result reading, and whenever an opened project will not be finished with finish_work.

compare_simulation_runs

ChatGPT

Read and compare two or more stored simulation runs in request order so rule-change effects can be assessed.

create_project

ChatGPT

Create a new project in Creator or Studio.

delete_file

ChatGPT

Delete one approved project file when its expected content hash still matches.

finish_work

ChatGPT

Finish the current Creator phase or apply the validated Studio proposal, then release the lease.

get_question

ChatGPT

Read a durable project question and its accepted answer after reconnecting or after the user answers in MijnSpel.

get_simulation_results

ChatGPT

Read one stored simulation run's complete Markdown report and structured result by run id.

list_design_revisions

ChatGPT

List Creator design revisions, oldest first, with stable labels and the current revision marked. Creator only.

list_design_systems

ChatGPT

List the Creator design-system catalog: each system's name, description, and when to use or avoid it. Creator only.

list_files

ChatGPT

List the MCP-visible text files for an opened project.

list_projects

ChatGPT

List projects owned by the signed-in user in one MijnSpel product.

list_simulation_runs

ChatGPT

List every stored simulation run for an opened project, newest first, including version and summary metadata.

open_project

ChatGPT

Open an owned project, return product-specific context (including Creator's self-contained current phase contract), and acquire a short external work lease. Set replace_existing_lease only to recover a lease lost by another agent session for the same account; this invalidates that session's lease.

prepare_publish

ChatGPT

Validate publish preconditions and mint a short-lived single-use publish confirmation token.

present_question

ChatGPT

Present one durable project-level question in MijnSpel before asking the same question in the Codex or ChatGPT conversation. Use this for every project question. Visual choices require a self-contained HTML preview on every substantive option.

preview_project

ChatGPT

Prepare and return the real authenticated product preview URL.

publish_project

ChatGPT

Consume a publish confirmation token and publish the current project revision to the public web.

read_file

ChatGPT

Read one approved UTF-8 project file and return its content hash.

restore_design_revision

ChatGPT

Restore a Creator design revision by stable label. This permanently removes every newer design revision and therefore requires explicit destructive confirmation. Creator only.

run_simulation

ChatGPT

Validate the current simulation contract and, when ready, prepare a version-pinned real browser simulation run. Returns actionable structured detail when not ready; otherwise returns a signed URL and run id for the configured run.

use_design_system

ChatGPT

Adopt one catalog design system in the Creator design_pick phase. The server copies the bundle to .context/design-system/, its tokens, fonts, icons, and styles into .context/design-pick/approved-mock/, and its fonts and icons into build/assets/. Existing files at those paths are replaced. Creator only.