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feedBack/specs/013-midi-control-mappings/spec.md
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Bret Mogilefskyandbyrongamatos d3037b903e rename: slopsmith -> feedBack, byron -> got-feedBack
Renames across the entire codebase:
- slopsmith/Slopsmith/SLOPSMITH/SlopSmith -> feedBack/FeedBack/FEEDBACK/FeedBack
- byron/Byron/Byrongamatos -> got-feedBack/got-feedBack/got-feedBack
- /home/byron/ -> /opt/got-feedBack/
- byron@ougsoft.com -> hi@got-feedBack.org
- github.com/byrongamatos/ -> github.com/got-feedback/
- com.byron. -> com.got-feedback.
- SLOPSMITH_ env vars -> FEEDBACK_ with backward-compat fallback
- Protocol/storage strings migrated with read-old/write-new pattern
- window.slopsmith JS API -> window.feedBack (canonical) + backward-compat alias

Refs: #rename-slopsmith
2026-06-23 10:04:23 +02:00

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# Spec 013 — `midi-control` Mappings Domain (the midi-input/midi-control split)
**Status:** documented future contract (RESERVED — not in the runtime graph) ·
**Issue:** #882 · **Depends on:** spec 012 (`midi-input`, delivered) · **Base:** `feedback/main`
## Summary
`midi-control` is the planned sibling of `midi-input`: it owns **MIDI control
mappings** — routing CC / pitchbend / note messages to *semantic actions* (drum
lane, transport command, effect parameter, etc.) — and **consumes `midi-input`**
for device access. It does **not** discover, select, or open devices; that is
`midi-input`'s job (spec 012, delivered).
This spec records the **split** so the boundary is unambiguous and the contract
is ready for whoever builds the runtime slice. Per project governance
(`docs/capability-safety-matrix.md`, `docs/capability-roadmap.md`), a future
domain stays **documentation-only until a PR ships its host workflow, a concrete
consumer, and tests** — so `midi-control` remains `RESERVED` in
`static/capabilities.js` `RESERVED_FUTURE_DOMAINS` until then. This spec does not
register a runtime domain.
## Why split it out
Before `midi-input` existed, "MIDI" meant two conflated concerns: getting bytes
from a device, and mapping those bytes to actions. The reserved `midi-control`
entry originally covered both. With `midi-input` delivered as the device control
plane, `midi-control` is narrowed to **mappings only** — mirroring how
`audio-input` (devices) is separate from `audio-effects`/`audio-mix` (what you do
with the signal). Keeping them separate prevents a future god-domain and lets the
device plane stabilize independently of mapping semantics.
## Boundary (normative)
- **`midi-input` owns:** device discovery (`discover`), source list, selection,
open/close sessions, the Web-MIDI permission boundary, redacted device
diagnostics. The raw MIDI message stream is delivered to in-page consumers via
its session handle.
- **`midi-control` will own:** named mappings from MIDI events (note / CC /
pitchbend, optionally channel-scoped) to semantic actions, mapping persistence,
active-mapping selection, and "learn" capture. It **consumes** a `midi-input`
session for the live stream; it never calls `requestMIDIAccess` or enumerates
devices.
## Proposed contract (for the future implementation slice)
- **Owner:** `core.midi-control` (or a first-party MIDI-control plugin),
`multi-provider`, safety `sensitive`.
- **Commands:** `list-mappings`, `get-mapping`, `set-mapping`, `delete-mapping`,
`activate-mapping`, `inspect`.
- **Mapping shape (sketch):** `{ id, label, trigger: { type: 'note'|'cc'|'pitchbend',
number?, channel? }, action: { domain?, command?|actionId, params? } }`.
- **Learn mode:** open a `midi-input` session, capture the next matching event,
and bind it to the pending action (the per-plugin "learn" UIs in drums today
are the reference behaviour to generalise).
- **Diagnostics:** `feedBack.midi_control.diagnostics.v1` — mapping summaries +
bounded recent activations; **no raw MIDI streams, no device labels**.
## Intended consumers (promotion trigger)
The domain should be promoted out of RESERVED when a concrete consumer needs
shared mappings, e.g.:
- the generic **MIDI control plugin** (`feedback-plugin-midi`) — today an ad-hoc
event→action mapper; the canonical first adopter.
- **drums** note→lane mapping + "learn mode" (`feedback-plugin-drums`,
`feedback-plugin-drum-highway-3d`) — currently per-plugin; could adopt
`midi-control` to share mapping logic once the contract is proven.
Until such a consumer-driven slice exists (with host workflow + tests), this
remains a documented contract only.
## Out of scope
- Any runtime registration / handlers (governance: no premature domain).
- Migrating the drums/keys per-plugin mapping now — deferred to the consumer slice.
- The device plane — owned by `midi-input` (spec 012, done).