[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: bridge
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 35% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU bridging. TPU is inherently flexible, requiring lower temps and careful cooling to manage stringing and bridge sag. The cool room temp (18\u00b0C) helps with cooling but requires careful extrusion to prevent jamming.", "settings": {"nozzle_temp": 220, "bed_temp": 35, "retraction_mm": 0.8, "fan_pct": 75, "first_layer_fan_pct": 0}, "risks": [{"location": "bridges", "risk": "sag", "why": "TPU is floppy; insufficient cooling or speed will cause drooping.", "anchor_hint": "bridge"}, {"location": "general", "risk": "stringing", "why": "Soft material demands minimal retraction and careful temp control.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: bridge
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 55% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU bridging. TPU requires low temps to manage stringing while maintaining enough flow for bridging. The cold room temp demands higher bed adhesion parameters to compensate for ambient cooling effects on the flexible material. I'll start conservatively to establish a baseline for the material's behavior.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 60, "first_layer_fan_pct": 0}, "risks": [{"location": "bridges", "risk": "sag", "why": "TPU's low stiffness makes bridges prone to drooping without sufficient bridge cooling.", "anchor_hint": "bridge"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: bridge
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 70% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU bridging. TPU is flexible and prone to stringing, especially in cool, humid air. The low ambient temperature and high humidity will increase the risk of bridging failure and adhesion issues.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 50, "first_layer_fan_pct": 0}, "risks": [{"location": "bridge", "risk": "sag", "why": "Low temp and high humidity hinder bridge stability.", "anchor_hint": "bridge"}, {"location": "overall", "risk": "stringing", "why": "TPU's flexibility requires careful retraction tuning.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: bridge
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 35% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU bridging. TPU requires low retraction to prevent jamming, and its flexibility means high cooling is needed to maintain shape during unsupported spans. The ambient temperature is moderate, so we focus on keeping the plastic cool enough to hold its form.", "settings": {"nozzle_temp": 220, "bed_temp": 40, "retraction_mm": 0.8, "fan_pct": 85, "first_layer_fan_pct": 0}, "risks": [{"location": "bridge", "risk": "sag", "why": "TPU is flexible and prone to drooping without sufficient cooling.", "anchor_hint": "bridge"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: bridge
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 55% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU bridging. TPU is flexible, so settings must prioritize damping vibration and managing stringing during the unsupported span. The ambient temperature is manageable, but bridging requires careful cooling control.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 80, "first_layer_fan_pct": 0}, "risks": [{"location": "bridge span", "risk": "sag", "why": "TPU's flexibility makes maintaining geometry over air difficult.", "anchor_hint": "bridge"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: bridge
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 70% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU bridging. TPU is flexible, demanding low print speeds and high retraction tuning to manage stringing without jamming. The ambient heat and humidity will encourage stringing and potentially softening during the bridge phase.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 1, "fan_pct": 50, "first_layer_fan_pct": 0}, "risks": [{"location": "bridge structure", "risk": "sag", "why": "TPU's flexibility combined with high ambient temperature promotes drooping.", "anchor_hint": "bridge"}, {"location": "part surface", "risk": "stringing", "why": "High humidity and flexible extrusion increase oozing between supports/bridges.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: stringing
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 35% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU stringing. TPU is flexible, which demands slower moves and aggressive retraction to manage oozing. Low ambient temperature (18\u00b0C) suggests we need a slightly higher nozzle temp to maintain flow consistency, while cooling needs to be managed to prevent internal stresses.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 60, "first_layer_fan_pct": 0}, "risks": [{"location": "between features", "risk": "stringing", "why": "TPU's elasticity allows it to ooze under retraction tension.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: stringing
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 55% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU stringing. TPU is flexible, meaning it requires controlled heat and retraction to manage oozing without snapping. The low ambient temperature (18\u00b0C) suggests we need a slightly higher nozzle temp to maintain flow integrity, but cooling needs to be managed to prevent heat creep causing more stringing.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 50, "first_layer_fan_pct": 0}, "risks": [{"location": "between features", "risk": "stringing", "why": "TPU's flexibility allows oozing to form long strands.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: stringing
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 70% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU stringing in this environment. TPU is prone to oozing due to its viscoelastic nature, and the cool, humid air will exacerbate stringing. We need high retraction and controlled heat to manage the melt flow.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 6.0, "fan_pct": 70, "first_layer_fan_pct": 0}, "risks": [{"location": "between features", "risk": "stringing", "why": "TPU's flow characteristics demand aggressive retraction to stop ooze.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: stringing
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 35% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU stringing in this environment. TPU demands low extrusion temperatures to manage its flexibility and high stringing tendency. The ambient temperature is moderate, so we focus on controlling the melt and retraction profile.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 50, "first_layer_fan_pct": 0}, "risks": [{"location": "between features", "risk": "stringing", "why": "TPU is prone to oozing due to its viscoelastic nature.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: stringing
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 55% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU stringing. TPU requires controlled flow and aggressive retraction to manage its viscoelastic nature, especially at ambient temperatures. The goal is to minimize oozing without causing extrusion stalls due to high friction.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 1.5, "fan_pct": 70, "first_layer_fan_pct": 0}, "risks": [{"location": "between features", "risk": "stringing", "why": "TPU's flexibility allows it to ooze easily between print paths.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: stringing
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 70% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU stringing in this environment. TPU is notoriously prone to oozing due to its flexibility and low viscosity when heated. High retraction speed and temperature are necessary to counteract melt flow, but cooling must be aggressive to manage stringing while maintaining dimensional stability. I'm pushing the retraction profile hard.", "settings": {"nozzle_temp": 220, "bed_temp": 50, "retraction_mm": 1.5, "fan_pct": 60, "first_layer_fan_pct": 0}, "risks": [{"location": "between features", "risk": "stringing", "why": "TPU's low melt strength combined with high ambient humidity promotes ooze.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: adhesion
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 35% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU adhesion in this environment. TPU is flexible, requiring low extrusion temperatures to maintain flow and prevent stringing, while the cool ambient temperature demands a heated bed for adhesion. We must prioritize bed grab over speed.", "settings": {"nozzle_temp": 220, "bed_temp": 50, "retraction_mm": 0.8, "fan_pct": 30, "first_layer_fan_pct": 0}, "risks": [{"location": "first layer", "risk": "adhesion", "why": "TPU's flexibility makes initial squish difficult in cool air.", "anchor_hint": "first_layer"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: adhesion
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 55% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU adhesion prints. TPU is flexible and sensitive to cooling and heat, especially at lower ambient temperatures. We need high bed heat to ensure good initial squish and adhesion, while managing nozzle temperature to prevent excessive stringing.", "settings": {"nozzle_temp": 220, "bed_temp": 50, "retraction_mm": 1, "fan_pct": 30, "first_layer_fan_pct": 0}, "risks": [{"location": "all", "risk": "adhesion", "why": "TPU grip needs sustained bed heat to conform properly.", "anchor_hint": "first_layer"}, {"location": "overhangs", "risk": "sag", "why": "TPU is inherently prone to drooping without adequate support/temp control.", "anchor_hint": "overhang"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: adhesion
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 70% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU adhesion in this cold, humid environment. TPU is flexible and prone to stringing/oozing, but the low ambient temp demands specific thermal management. We need to keep the plastic pliable enough to adhere without excessive heat creep.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 30, "first_layer_fan_pct": 0}, "risks": [{"location": "entire part", "risk": "adhesion", "why": "Low ambient temp increases surface tension and cooling rate.", "anchor_hint": "first_layer"}, {"location": "overhangs", "risk": "sag", "why": "TPU's flexibility requires controlled cooling to maintain shape.", "anchor_hint": "overhang"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: adhesion
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 35% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU adhesion jobs. TPU requires low extrusion speeds and adequate bed adhesion without excessive heat causing oozing. The ambient temperature is mild, so no major environmental compensation is needed. I'll start with parameters optimized for initial grip and controlled flow.", "settings": {"nozzle_temp": 220, "bed_temp": 50, "retraction_mm": 0.8, "fan_pct": 40, "first_layer_fan_pct": 0}, "risks": [{"location": "first layer", "risk": "adhesion", "why": "TPU is flexible; a good initial squish is critical for grip.", "anchor_hint": "first_layer"}, {"location": "all", "risk": "stringing", "why": "TPU can ooze if temps are too high or retraction is weak.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: adhesion
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 55% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU adhesion jobs. TPU is flexible, requiring slower speeds and lower temps than rigid filaments to manage stringing and deformation. The ambient temperature is moderate, but TPU needs good bed adhesion.", "settings": {"nozzle_temp": 220, "bed_temp": 50, "retraction_mm": 0.8, "fan_pct": 40, "first_layer_fan_pct": 0}, "risks": [{"location": "first layer", "risk": "adhesion", "why": "TPU can be sticky, requires adequate bed temp and squish.", "anchor_hint": "first_layer"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: adhesion
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 70% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU adhesion in this environment. TPU is flexible, requiring low printing forces and moderate heat to prevent jamming or excessive stringing. High humidity and moderate ambient temperature demand careful bed adhesion tuning.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 30, "first_layer_fan_pct": 0}, "risks": [{"location": "base of print", "risk": "adhesion", "why": "TPU sticks well but high humidity can affect initial surface tack.", "anchor_hint": "first_layer"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: vase
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 35% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU vase prints. TPU is flexible and prone to stringing and deformation, especially in cold environments. The low ambient temperature requires careful temperature management to maintain print quality without excessive heat creep.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 60, "first_layer_fan_pct": 0}, "risks": [{"location": "entire part", "risk": "stringing", "why": "TPU's flexibility makes it prone to oozing when cooled too quickly.", "anchor_hint": "null"}, {"location": "overhangs/walls", "risk": "sag", "why": "Low ambient temperature combined with material flexibility increases sag potential.", "anchor_hint": "overhang"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: vase
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 55% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU vase printing. TPU is flexible, requiring slower speeds and lower temps to prevent heat creep and stringing. The cool room temp (18\u00b0C) demands a warm bed to maintain adhesion, though the vase geometry helps mitigate warping.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 60, "first_layer_fan_pct": 0}, "risks": [{"location": "entire part", "risk": "stringing", "why": "TPU's flexibility makes oozing common if temps are too high.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: vase
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 18°C
  humidity: 70% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU vase geometry. TPU is flexible, requiring lower speeds and controlled cooling to manage stringing and deformation, especially at 18\u00b0C ambient. The vase shape needs good adhesion and minimal retraction to prevent oozing between walls. I'll start conservative for a flexible material in a cool, humid environment.", "settings": {"nozzle_temp": 220, "bed_temp": 45, "retraction_mm": 0.8, "fan_pct": 60, "first_layer_fan_pct": 0}, "risks": [{"location": "overhangs/walls", "risk": "sag", "why": "TPU's flexibility coupled with low ambient temp promotes drooping.", "anchor_hint": "overhang"}, {"location": "between layers", "risk": "stringing", "why": "Flexible filaments tend to ooze when retraction is too aggressive or heat is too high.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: vase
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 35% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU vase printing. TPU requires lower temperatures than rigid filaments to prevent stringing, but high enough for extrusion. The ambient heat (32\u00b0C) is manageable, so we focus on material requirements for consistent extrusion and flow.", "settings": {"nozzle_temp": 220, "bed_temp": 35, "retraction_mm": 0.8, "fan_pct": 70, "first_layer_fan_pct": 0}, "risks": [{"location": "overall", "risk": "stringing", "why": "TPU is prone to stringing if nozzle temp is too high.", "anchor_hint": "null"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: vase
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 55% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU vase geometry. TPU requires low-to-moderate heat to manage stringing while maintaining enough flow for the continuous spiral. The ambient temp is moderate, so aggressive cooling is not required, but some flow control is necessary for TPU's flexibility. I will bias toward lower temps to prevent oozing.", "settings": {"nozzle_temp": 220, "bed_temp": 35, "retraction_mm": 0.8, "fan_pct": 60, "first_layer_fan_pct": 0}, "risks": [{"location": "overhangs/walls", "risk": "stringing", "why": "TPU is prone to oozing if temps are too high.", "anchor_hint": "null"}, {"location": "first layer", "risk": "adhesion", "why": "Vase geometry can pull off if the initial layers are too cool.", "anchor_hint": "first_layer"}]}


[User]
You are Chief Engineer O'Brien: a veteran print-shop master who has run thousands of FDM jobs. You are terse and physical. You think in feeds, temps, cooling, and how the room affects the plastic. You do not hype. You propose settings; a deterministic Spine will veto anything unsafe, so propose what is *right*, not what is merely safe.

You reason about PRECEDENT before you decide. Weigh what transfers to THIS job and what does not. If nothing close applies, say "no close precedent" and reason from material properties.

CURRENT JOB:
  material: TPU
  geometry: vase
  description: (none given)

ENVIRONMENT (right now in the room):
  temperature: 32°C
  humidity: 70% RH

HISTORICAL PRECEDENT:
  (none) — no prior job matches this material + geometry. Reason from material properties and say so plainly.

Respond ONLY with valid JSON, no prose outside it, in exactly this shape:
{
  "reasoning": "2-4 sentences. START with your evaluation of prior knowledge: what transfers, what doesn't, and why. Then the decision.",
  "settings": {
    "nozzle_temp": <C>, "bed_temp": <C>, "retraction_mm": <mm>,
    "fan_pct": <0-100>, "first_layer_fan_pct": <0-100>
  },
  "risks": [
    {"location": "where on the part", "risk": "sag|stringing|adhesion|warping|delamination",
     "why": "one line", "anchor_hint": "overhang|bridge|first_layer|corner|null"}
  ]
}

Give your recommendation for THIS job now.

[Assistant] {"reasoning": "No close precedent exists for TPU vase prints. TPU requires moderate temperature control to maintain flexibility while managing stringing inherent to its viscoelastic nature. The ambient heat and humidity push for slightly higher extrusion temps to aid flow, but we must keep cooling aggressive for dimensional stability.", "settings": {"nozzle_temp": 220, "bed_temp": 40, "retraction_mm": 0.8, "fan_pct": 80, "first_layer_fan_pct": 0}, "risks": [{"location": "overhangs/walls", "risk": "sag", "why": "TPU is flexible, prone to drooping without sufficient cooling.", "anchor_hint": "overhang"}, {"location": "travels", "risk": "stringing", "why": "Viscoelastic nature of TPU promotes stringing, necessitating minimal retraction.", "anchor_hint": "null"}]}