3D Print Farm & Slicer Queue Ops — Catch the wrong-temperature plate, the empty spool and the money-losing SKU before the printers run.

What It Does: The 4-Bucket Technical Breakdown

• Local-only inputs: OrcaSlicer, Bambu Studio and PrusaSlicer / SuperSlicer .3mf and .gcode.3mf projects, plain .gcode, and optional CSV / JSON spool, SKU and printer tables. 3MF archives are opened with hardened ZIP limits.
• 4 deterministic audit buckets:
  1. .3mf / .gcode Slicer Profile & Thermal/Mechanical Safety Audit: nozzle and bed temperatures against each material's envelope and degradation limit (THERMAL_RUNAWAY_OR_OUT_OF_RANGE, TEMP_MATERIAL_MISMATCH), abrasive CF/GF filament on a brass nozzle or a nozzle under 0.4 mm (ABRASIVE_FILAMENT_BRASS_NOZZLE, ABRASIVE_CLOG_RISK_SMALL_NOZZLE), PAHT / PA / ABS on an open-frame printer (ENCLOSURE_REQUIRED_OPEN_FRAME), TPU volumetric speed, layer height against nozzle diameter, and weak infill pattern, thin walls or low infill on structural parts (WEAK_INFILL_PATTERN_STRUCTURAL, STRUCTURAL_UNDER_WALLED). Unsafe archives (ARCHIVE_SAFETY_VIOLATION) and embedded printer API keys (EMBEDDED_PRINTER_CREDENTIAL, value never shown) are flagged.
  2. Spool Inventory & Moisture Hygiene: remaining grams against each material's queued demand with a scrap buffer (SPOOL_INSUFFICIENT_FOR_QUEUE, SPOOL_LOW_STOCK), drying cadence for hygroscopic spools such as PAHT-CF, PA, TPU and PETG (HYGROSCOPIC_DRYING_OVERDUE) and desiccant age (DESICCANT_CHANGE_OVERDUE).
  3. Unit Economics & Per-Part BOM Margin Audit: filament, electricity, machine time and labour per unit, net of marketplace fee and shipping, with a gross-margin check (SKU_NEGATIVE_MARGIN, SKU_CRITICAL_MARGIN_COMPRESSION, SKU_BELOW_TARGET_MARGIN) and a table-versus-slice BOM comparison (PLATE_BOM_MISMATCH).
  4. Storefront SKU Run-Rate & Multi-Printer Queue Scheduler: days of supply from sales velocity, lead time and safety stock (SKU_BACKORDER_DEFICIT, SKU_STOCKOUT_IMMINENT, SKU_REORDER_TRIGGER), a greedy earliest-finish schedule across your printers honouring nozzle, temperature and enclosure limits (NO_COMPATIBLE_PRINTER_FOR_JOB, FARM_CAPACITY_OVERLOAD), written to a priority CSV with --queue-csv.
• Recurring delta mode (--state PATH --delta): tracks spool draw-down (SPOOL_DEPLETED), SKU supply drops (SKU_DAYS_OF_SUPPLY_DROP) and slicer profile drift (PROFILE_DRIFT_DETECTED) between runs, suited to a scheduled UpdateRoutine.

How It Runs (5 Steps)

Real Sample Audit: 4-printer composite & functional-part farm

Sample disclosure: this is a representative sample, not a customer report. It was produced against public or fictional test targets; account and credential values are placeholders or redacted (for example wck_<REDACTED>), and no private keys, seed phrases or secrets are ever shown. Your own report will differ in content and length.

Excerpt from --format markdown on a synthetic farm (Bambu X1C, P1S, A1 and a Voron 2.4; 8 plates, 6 spools, 6 SKUs). All spools, prices and plates are fabricated for illustration and no printer was contacted. Output is unedited; omitted parts are marked. Exit 3: the worst finding is CRITICAL at the default --fail-on medium.

# 3D Print Farm & Slicer Queue Ops Report

```
snapshot   2026-10-27 00:00:00 UTC | tool=print-farm-ops
endpoints  local-files
```

**Inputs:** 8 slicer file(s) / 8 plate(s), 6 spool(s), 6 SKU(s), 4 printer(s)

## Summary

| critical | high | medium | low | info | worst |
|---|---|---|---|---|---|
| 9 | 11 | 6 | 1 | 0 | CRITICAL |

## Bucket 1 - Slicer profile & thermal / mechanical safety

| file | plate | slicer | printer | nozzle | material | layer | walls | infill | N/B C | hrs | g |
|---|---|---|---|---|---|---|---|---|---|---|---|
| bracket_placf.gcode.3mf | 1 | BambuStudio | Bambu Lab X1 Carbon | 0.40 hardened_steel | PLA-CF | 0.20 | 2 | 10% grid | 230/55 | 3.00 | 62.0 |
| calibration_pla_hot.gcode.3mf | 1 | BambuStudio | Voron 2.4 350 | 0.40 tungsten_carbide | PLA | 0.20 | 3 | 20% gyroid | 265/55 | 0.60 | 6.0 |
| fanduct_placf_a1.gcode.3mf | 1 | BambuStudio | Bambu Lab A1 | 0.40 brass | PLA-CF | 0.20 | 3 | 20% gyroid | 230/55 | 1.80 | 21.0 |
| gear_pahtcf.gcode.3mf | 1 | BambuStudio | Bambu Lab P1S | 0.60 hardened_steel | PAHT-CF | 0.28 | 4 | 30% gyroid | 210/55 | 5.50 | 88.0 |

[... 4 more plate rows omitted ...]

- **CRITICAL** `ABRASIVE_FILAMENT_BRASS_NOZZLE` fanduct_placf_a1.gcode.3mf: abrasive filament PLA-CF sliced for a brass nozzle (slicer file); it will wear through it, use a hardened / tungsten nozzle
- **CRITICAL** `THERMAL_RUNAWAY_OR_OUT_OF_RANGE` calibration_pla_hot.gcode.3mf: PLA sliced at 265 C exceeds its 250 C degradation limit (charring, heat-creep jams, fumes)
- **HIGH** `STRUCTURAL_UNDER_WALLED` bracket_placf.gcode.3mf: structural part is under-built: infill 10% (<15%), 2 wall loops (<3)
- **HIGH** `TEMP_MATERIAL_MISMATCH` gear_pahtcf.gcode.3mf: PAHT-CF sliced with nozzle 210 C (envelope 270-315 C) and bed 55 C (envelope 80-115 C); the filament preset was probably not switched
- **HIGH** `WEAK_INFILL_PATTERN_STRUCTURAL` bracket_placf.gcode.3mf: grid infill on a structural part: the nozzle re-crosses infill lines and shear strength is poor; use gyroid, cross_hatch or cubic
- **MEDIUM** `ABRASIVE_CLOG_RISK_SMALL_NOZZLE` pulley_pa6cf.gcode.3mf: heavily filled PA6-CF on a 0.4 mm nozzle clogs often; a 0.6 mm hardened nozzle is recommended
- **MEDIUM** `TPU_HIGH_VOLUMETRIC_SPEED` gasket_tpu.gcode.3mf: TPU max volumetric speed 9 mm3/s exceeds 6.0 (extruder gear buckling / jams)

## Bucket 2 - Spool inventory, moisture hygiene & BOM depletion

[... spool ledger and per-material demand tables omitted ...]

- **CRITICAL** `SPOOL_INSUFFICIENT_FOR_QUEUE` PA6-CF: queue needs 27 g (incl. scrap buffer) but 0 g on hand across 0 spool(s); short by 27 g
- **CRITICAL** `SPOOL_INSUFFICIENT_FOR_QUEUE` PAHT-CF: queue needs 458 g (incl. scrap buffer) but only 310 g on hand across 1 spool(s); short by 148 g
- **CRITICAL** `SPOOL_INSUFFICIENT_FOR_QUEUE` PLA-CF: queue needs 1634 g (incl. scrap buffer) but only 520 g on hand across 1 spool(s); short by 1114 g
- **HIGH** `HYGROSCOPIC_DRYING_OVERDUE` spool S-PAHT-1 (PAHT-CF) drying overdue: last dried 26 days ago (limit 7 days); wet filament strings, bubbles and loses strength
- **HIGH** `HYGROSCOPIC_DRYING_OVERDUE` spool S-TPU-1 (TPU) drying overdue: no dried_at recorded (limit 7 days); wet filament strings, bubbles and loses strength
- **HIGH** `SPOOL_LOW_STOCK` spool S-PETG-2 (Polymaker PETG) has 130 g left (<= 150 g floor); swap before a long print
- **LOW** `DESICCANT_CHANGE_OVERDUE` spool S-PAHT-1 desiccant last changed 87 days ago (limit 60)

## Bucket 3 - Unit economics & per-part BOM

| sku | material | filament | power | machine | labor | COGS | price | net rev | profit | margin |
|---|---|---|---|---|---|---|---|---|---|---|
| BRK-CF-01 | PLA-CF | $0.73 | $0.03 | $0.78 | $2.20 | $3.73 | $18.00 | $10.26 | $6.53 | 36.3% |
| GEAR-PAHT-02 | PAHT-CF | $4.35 | $0.07 | $2.29 | $3.67 | $10.38 | $24.00 | $16.08 | $5.70 | 23.8% |
| CLIP-PETG-03 | PETG | $0.06 | $0.00 | $0.11 | $1.10 | $1.28 | $7.50 | $6.53 | $5.25 | 69.9% |
| GASKET-TPU-04 | TPU | $0.15 | $0.02 | $0.45 | $1.47 | $2.08 | $4.50 | $3.92 | $1.83 | 40.7% |
| VASE-PLA-05 | PLA | $1.88 | $0.20 | $5.75 | $1.83 | $9.65 | $16.00 | $8.72 | -$0.93 | -5.8% |
| MINI-PLA-06 | PLA | $0.36 | $0.10 | $3.54 | $1.83 | $5.83 | $12.00 | $6.44 | $0.61 | 5.1% |

[... unlinked-plate cost table omitted ...]

- **CRITICAL** `SKU_NEGATIVE_MARGIN` VASE-PLA-05 loses $0.93 per unit (COGS $9.65 vs net revenue $8.72)
- **HIGH** `SKU_CRITICAL_MARGIN_COMPRESSION` GEAR-PAHT-02 gross margin 23.8% is under 25% (profit $5.70 on $24.00)
- **HIGH** `SKU_CRITICAL_MARGIN_COMPRESSION` MINI-PLA-06 gross margin 5.1% is under 25% (profit $0.61 on $12.00)
- **MEDIUM** `PLATE_BOM_MISMATCH` GASKET-TPU-04 vs gasket_tpu.gcode.3mf#1: hours/unit table 0.50 vs sliced 0.37 (-27%); costs and queue hours use the table values
- **MEDIUM** `SKU_BELOW_TARGET_MARGIN` BRK-CF-01 gross margin 36.3% is below the 45.0% target
- **MEDIUM** `SKU_BELOW_TARGET_MARGIN` GASKET-TPU-04 gross margin 40.7% is below the 45.0% target

## Bucket 4 - SKU run-rate & multi-printer queue

[... run-rate table and printer load table omitted ...]

Scheduled queue (greedy earliest-finish):

| # | tier | sku | material | plates | units | printer | hrs | grams | COGS | margin | days supply |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1_BACKORDER | BRK-CF-01 | PLA-CF | 11 | 44 | voron-01 | 33.0 | 709 | $3.73 | 36.3% | 0.0 |
| 1 | 1_BACKORDER | BRK-CF-01 | PLA-CF | 14 | 55 | x1c-01 | 42.0 | 903 | $3.73 | 36.3% | 0.0 |
| 2 | 1_BACKORDER | MINI-PLA-06 | PLA | 5 | 5 | UNASSIGNED | 20.0 | 94 | $5.83 | 5.1% | 0.0 |
| 3 | 2_STOCKOUT_RISK | GASKET-TPU-04 | TPU | 1 | 3 | a1-01 | 3.0 | 25 | $2.08 | 40.7% | 1.2 |
| 4 | 2_STOCKOUT_RISK | GEAR-PAHT-02 | PAHT-CF | 5 | 10 | p1s-01 | 27.5 | 458 | $10.38 | 23.8% | 2.7 |
| 5 | 3_SAFETY_REPLENISH | CLIP-PETG-03 | PETG | 1 | 6 | a1-01 | 1.5 | 31 | $1.28 | 69.9% | 4.0 |

- **CRITICAL** `NO_COMPATIBLE_PRINTER_FOR_JOB` MINI-PLA-06 (PLA) needs [0.2 mm nozzle, 215 C hotend, 55 C bed] but no online printer provides: 0.2 mm nozzle
- **CRITICAL** `SKU_BACKORDER_DEFICIT` BRK-CF-01: 3 on hand vs 90 open orders; 87 customer unit(s) are waiting on the print queue
- **CRITICAL** `SKU_BACKORDER_DEFICIT` MINI-PLA-06: 0 on hand vs 2 open orders; 2 customer unit(s) are waiting on the print queue
- **HIGH** `FARM_CAPACITY_OVERLOAD` farm capacity overload: 1 urgent job(s) would finish after their lead time (BRK-CF-01)
- **HIGH** `SKU_STOCKOUT_IMMINENT` GASKET-TPU-04: 1.2 days of supply is below the 2 day lead time; it will stock out before a reprint lands
- **HIGH** `SKU_STOCKOUT_IMMINENT` GEAR-PAHT-02: 2.7 days of supply is below the 6 day lead time; it will stock out before a reprint lands
- **MEDIUM** `SKU_REORDER_TRIGGER` CLIP-PETG-03: 4.0 days of supply is below lead time + safety stock (5 days); queue 1 plate(s)

## Delta since baseline

baseline run: 27 finding(s) recorded as NEW; no prior state

exit_code 3 (fail-on=medium)

---

[... SCOPE_NOTE omitted (printed in full with every report) ...]

CLI Reference: Flags & Exit Codes

Mandatory Refusal Boundaries

• Offline and read-only. No network request: no Bambu Cloud, MQTT, Moonraker, Klipper, OctoPrint or PrusaLink call. It never sends G-code, starts, stops or heats a printer, and never modifies or overwrites a .3mf or .gcode file. --queue-csv only writes a new CSV.
• No credentials. API keys, seed phrases and printer LAN access codes in arguments or tables are refused (exit 10) and never echoed. A slicer file with an embedded printer key raises EMBEDDED_PRINTER_CREDENTIAL without showing the value.
• Your files only. It audits projects and tables you own or are authorised to review, and will not bypass thermal-runaway protection or recommend running unattended against a CRITICAL finding.
• Heuristic, not certification. Thermal and structural findings are checks of slicer metadata, not mechanical-engineering certification and not a substitute for hardware fire-safety protection. Cost, margin and reorder figures are arithmetic on the numbers you supply, not financial, tax or accounting advice.

Scope note (printed with every report): 100% offline, local, read-only inspection of slicer files and the spool, order and printer tables you supply; no network request, no G-code sent, no print started, stopped or heated, no project file modified; credentials and printer access codes refused; heuristic checks; not engineering certification or financial advice.

Pinned Runtime Hashes (SHA-256 Verified)

• https://botappstore.com/runtime/print_farm_ops.py — 2,165 lines — SHA-256: 29edc5e8664be0b6823edc6ea985467fba83430f03d5781cd6fe341684abb669
• https://botappstore.com/runtime/bot_common.py — 274 lines — SHA-256: d1941b61b95ca664e4c1286c3bf1918c00e976c2c1601199b19200257650e526

Runtime URLs are license-gated: send X-License-Key: wcl_... or X-Agent-Key: wck_... (unauthenticated requests get 401). The served file carries a per-license watermark block (5 lines), so compare the X-Canonical-SHA256 response header (or the SHA-256 after stripping the block) against the pins above. The recommended path is the setup skill installer:

python3 /workspace/.wattcoin_license_check.py --sku print-farm-ops --install-runtime ... --expected-sha256 29edc5e8664be0b6823edc6ea985467fba83430f03d5781cd6fe341684abb669

The setup and audit skills verify both canonical digests before every run and refuse to execute either file on a mismatch. Both are locked at chmod 500. The runtime is stdlib-only Python and is covered by 393 unit tests.

Technical FAQ

Licensing & Setup

$29.00 USD one-time, paid by card, Apple Pay or Google Pay, with up to 3 workspace-reset rebinds and no subscription. On Turn 1 the print-farm-ops-setup skill installs the read-only license helper (0500), verifies and installs the SHA-256-pinned runtime, registers and activates your agent key, binds your wcl_... code through stdin, runs a self-check audit on a built-in unsafe spool and SKU table, and offers a first audit of your own farm plus an optional scheduled queue and spool delta routine. The license code is never printed in chat.

One wcl_... key, two runtimes. Your license key works inside Grok Bot and from any local terminal or IDE agent (Cursor, Claude Code, Windsurf, CI/CD) via the standalone single-file Python 3 CLI (/runtime/print_farm_ops.py) — Python 3.10+ standard library only, zero pip install dependencies, with --json / --markdown output.