STLP Shop Manager (farmd) — design overview

Status: DRAFT for founder review (#855). Working title farmd; product name STLP Shop Manager. License: proprietary SLP pending decision.

1. Goal

Run the Starting Line Productions shop as a production system: Etsy orders flow through Dolibarr into managed print / laser / CNC / reflow / cut / sew / embroider jobs on the shop floor, with completion flowing back. One dashboard, Cloudron-deployable, SSO via the platform OIDC provider, single Go binary. Shop-time booking integrates with ThymeSlot (the Cloudron booking app already in use).

2. Managed device classes

Class	Devices	Adapter	Control level
FDM printers	Klipper/Moonraker, OctoPrint, Bambu	moonraker / octoprint / bambu	full (status, files, jobs, temps)
Reflow oven	Whizoo controller	reflow	profile library + run logging (v1); serial/MQTT start+monitor (v2)
Laser (CR-10 conversion)	GRBL	grbl-laser	full (power/speed presets, job send)
CNC (CR-10 conversion)	GRBL	grbl-cnc	full (feeds/speeds/tools, job send)
Glowforge laser ×2	Glowforge cloud service	glowforge (unofficial API)	job push + status poll; cloud-tethered, community API
Chinese CO2 laser	DSP (Ruida/TopWisdom) or GRBL	dsp / grbl (survey first)	job send + status; DSP protocol is reverse-engineered territory
Silhouette Cameo ×2	Silhouette graphtec protocol	cameo (Linux `silhouette` tool lineage)	cut job send; one device reserved for PCB stencils (pairs with #859 pipeline)
Embroidery machines	USB-direct (no network)	embroidery (file prep only)	pattern export (.pes/.dst via Ink/Stitch + libembroidery) + job tracking
Sewing machines	manual	manual (tracking only)	job/time tracking against ThymeSlot bookings

Design rule: devices without network control get the manual-device class — job tracking, time logging against ThymeSlot bookings, and file prep — instead of pretending to direct control.

3. ThymeSlot booking integration

Shop time is booked in ThymeSlot (Cloudron app, already in use; upstream POOL_SIZE request pending in #739). farmd integrates rather than replaces:

device reservation view: farmd pulls bookings (ThymeSlot API/export) so the dashboard shows booked slots per device alongside live job state;
gate rule (configurable): device jobs require an active/covering booking for the member, or warn-only mode;
usage writeback: actual run time logged per job feeds billing/reports.

4. System context

flowchart LR
    E[Etsy orders] --> D[Dolibarr ERP/MRP]
    D -- REST: orders + fulfillment --> F[farmd]
    O[Operator] -- OIDC SSO --> F
    B2[ThymeSlot bookings] -- API/sync --> F
    F -- Moonraker WS --> K[FDM printers]
    F -- OctoPrint REST --> OP[FDM printers]
    F -- MQTT/FTP --> B[Bambu]
    F -- serial/bridge --> R[Whizoo reflow oven]
    F -- GRBL serial --> L[CR-10 laser]
    F -- GRBL serial --> C[CR-10 CNC]
    F -- unofficial cloud API --> G[Glowforge x2]
    F -- DSP/GRBL survey --> Z[Chinese CO2 laser]
    F -- cameo tool --> CM[Cameo x2: stencil + general]
    F -- file prep + tracking --> EM[Embroidery + sewing]
    F -- alerts --> N[ntfy]
    F -- G-code/artifacts --> S[(farm storage)]

5. Components

core (Go): job queue + state machine (per device class), scheduler (capabilities: material, build volume, bed, laser wattage, oven profile, hoop/needle for embroidery), retry/reprint rules, batch groups (Etsy orders = batches).
adapters: moonraker (WS), octoprint (REST+WS), bambu (MQTT/FTP), grbl (serial; laser+cnc profiles), reflow (profile mgmt v1, control v2), glowforge (unofficial cloud API, poll-based), cameo (cut jobs), manual (tracking-only class).
profiles: reflow curves (per paste), laser material presets (per machine), CNC tool libraries, embroidery hoop/thread presets — all versioned; runs record the profile version used.
web (embedded html/template + htmx, no Node): farm dashboard, device cards, job board, batch view, profile editors (incl. reflow curve editor), booking calendar view, history.
dolibarr-connector: confirmed orders -> job specs; fulfillment writeback; idempotent.
authn: Cloudron OIDC; roles admin/operator/viewer; API tokens for machine access.

6. Job lifecycle

stateDiagram-v2
    [*] --> Queued: order line / manual
    Queued --> Prep: slicing / CAM / profile / pattern
    Prep --> Ready: artifacts + booking check
    Ready --> Running: device free (+ booking if gated)
    Running --> Post: job complete
    Post --> Done: QA pass
    Post --> Reprint: QA fail
    Running --> Failed: error / material out
    Failed --> Queued: auto-requeue (n retries)
    Done --> [*]: Dolibarr fulfillment writeback

7. Phasing

MVP-1: dashboard + FDM adapters (Moonraker/OctoPrint) + manual queue + OIDC + ntfy alerts + Cloudron package.
MVP-2: GRBL adapter (CR-10 laser/CNC) + Silhouette cameo (stencil + general) + profile libraries + Dolibarr connector + ThymeSlot booking view.
MVP-3: reflow profile library + run logging + Whizoo bridge, Glowforge unofficial-API adapter, Chinese laser DSP survey, embroidery/sewing manual-device tracking, batch automation, QA checklists, Prometheus.

8. Cloudron packaging

manifestVersion 2: httpPort 3000, localstorage (sqlite + artifacts), OIDC addon, healthcheck /healthz, multi-user via platform groups. Serial devices reach farmd over TCP serial bridges (ser2net) — Cloudron apps have no serial access by design.

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