io.github.konni-arcadia/moontide

What it mainly works on, as our AI model read its tool descriptions: files and code on the machine it runs on; a web browser or desktop applications.

10 of 15 tools are described as changing something (creating, editing, deleting, sending or running).

• get_codeon 4 other serversreads or searches

  “Reads the Strudel code currently playing in the Moontide page, i.e.”

  Publisher declares: read-only yes

  Takes no inputs.

• get_strudel_referencereads or searches

  “Returns the Strudel reference for @strudel/repl 1.3.0, the version the Moontide page loads: facts about what exists and how to write it, not what to choose.”

  Publisher declares: read-only yes

  1 input

  • topicstring“One topic to return; omit it to get the index of topics”
• set_codecreates or changes datadescribed as changing data

  “Replaces the music in the Moontide page with new Strudel code; the new pattern takes over within a fraction of a second, mid-cycle, without stopping the music.”

  6 inputs, 1 required

  • codestringrequired“Complete Strudel code to play”
  • labelstring“A few words saying what this change is, for example "added a bass"; shown by list_history”
  • atstring“When the change takes over: 'now' (the default) within a fraction of a second, 'bar' on the next bar line, 'phrase' on the next phrase line (4 cycles, counted …”
  • phraseCyclesinteger“How many cycles one phrase lasts, for at: 'phrase' (2 to 64, default 4)”
  • glideBarsinteger“Whole bars, 1 to 64, to move the tempo smoothly from the tempo that plays to the one this code sets with setcps or setcpm; with at, it starts at the line.”
  • answeringstring“The id of the page request this change answers, from its request line; the page shows that request as applied only when the change names it here”
• edit_codecreates or changes datadescribed as changing data

  “Changes part of the code that will play by exact text replacement, sending only the change.”

  7 inputs, 1 required

  • editsarrayrequired“The replacements, 1 to 50, applied all together or not at all”
  • baseinteger“The version number get_code shows (#N); the edit is refused when another version plays now”
  • labelstring“A few words saying what this change is, for example "added a bass"; shown by list_history”
  • atstring“When the change takes over: 'now' (the default) within a fraction of a second, 'bar' on the next bar line, 'phrase' on the next phrase line (4 cycles, counted …”
  • phraseCyclesinteger“How many cycles one phrase lasts, for at: 'phrase' (2 to 64, default 4)”
  • glideBarsinteger“Whole bars, 1 to 64, to move the tempo smoothly from the tempo that plays to the one this code sets with setcps or setcpm; with at, it starts at the line.”
  • answeringstring“The id of the page request this change answers, from its request line; the page shows that request as applied only when the change names it here”
• list_historyon 9 other serversreads or searches

  “Lists the versions of the music that played, newest first, one per row: "#id — time (UTC) — origin — \"label\" — first line of code".”

  Publisher declares: read-only yes

  3 inputs

  • limitinteger“How many versions to list, newest first (default 20)”
  • filterstring“Only versions whose label, code or favorite name contains this text (case-insensitive)”
  • favoritesboolean“true to list only favorites”
• favorite_versioncreates or changes datadescribed as changing data

  “Keeps a version as a named favorite, by its id from list_history (the version playing now is the one shown as v{id} in the page top bar).”

  2 inputs, 2 required

  • idintegerrequired“Version id from list_history”
  • namestringrequired“Name to keep it under, in the user's words”
• restore_versionon 7 other serverscreates or changes datadescribed as changing data

  “Plays a past version again, by its id from list_history, in one call: it takes over within a fraction of a second without stopping the music, with the same checks as set_code.”

  2 inputs, 1 required

  • idintegerrequired“Version id from list_history, for example 41 for #41”
  • answeringstring“The id of the page request this change answers, from its request line; the page shows that request as applied only when the change names it here”
• answer_requeston 2 other serverssends messagesdescribed as changing data

  “Closes a request typed in the Moontide page without changing the music.”

  Publisher declares: destructive no

  3 inputs, 3 required

  • idstringrequired“The id of the page request to close, from its request line”
  • outcomestringrequired“answered when the request was answered in words, declined when it will not or cannot be done”
  • textstringrequired“One sentence for the user, at most 200 characters; the page shows it under the request”
• stopon 16 other serversdescribed as changing data

  “Stops all sound in the Moontide page right away, even when the current code is broken.”

  Publisher declares: destructive no · idempotent yes

  Takes no inputs.

• get_midi_instrumentsreads or searches

  “When the user has described their instruments, call this before writing MIDI code.”

  Publisher declares: read-only yes

  1 input

  • instrumentstring“An instrument id from instruments.json, to list its sounds”
• search_midi_soundsreads or searches

  “Searches the sound catalog of one instrument: a list of the model's sounds kept in the user's data folder, built from a patch-name file or a sound list the user owns.”

  Publisher declares: read-only yes

  3 inputs, 1 required

  • instrumentstringrequired“An instrument id from instruments.json whose model has a sound catalog”
  • querystring“Words to find in the sound name or its category, in any order; case and spaces do not matter”
  • categorystring“Only sounds of this category; case and spaces do not matter”
• save_midi_modelcreates or changes datadescribed as changing data

  “Saves an instrument model that you drafted from a page of the instrument's manual the user pasted, into the user's Moontide data folder (models/<id>.json), never into Moontide itself.”

  3 inputs, 2 required

  • modelobjectrequired“The drafted model, as a JSON object”
  • confirmedbooleanrequired“false to check and summarize without saving; true only after the user said yes to the summary”
  • overwriteboolean“true to replace an existing user model with the same id”

Each quoted sentence is the first sentence of the publisher’s own description. The kind of tool and the “changes data” mark are our AI model’s reading of that description, not something we tested: two differently worded runs had to agree, otherwise no label is shown, and nobody has checked them by hand. A tool without the “changes data” mark is described as only reading, searching or calculating, or the two runs did not agree. No tool was called. Read the publisher’s full description before relying on it. “Publisher declares” lists the hints the server itself sends with the tool (MCP annotations: read-only, destructive, idempotent, open-world); they are the publisher's claims, not checked by us. Inputs are the parameters in the tool's own input schema: name, declared type, whether it is required, and the first sentence of its description. Read 2026-10-23.

The registry verifies a package once, when it is published, and does not re-check it. A difference below is about the listing, not a judgement of the publisher.