Chapter 242: Session Two

The next morning, the prototype room looked the same, but the rhythm was different.There were clipboards now. A printed sign-in sheet on a metal board near the door. A sealed envelope taped beside it labeled ACCESS TOKENS — CONTROLLED in Victor’s handwriting. A small strip of gaffer tape on the floor marking where visitors stopped before crossing into the clean zone.

Hana stood at the door with a tablet and a pen. She didn’t let anyone drift in.

"Name, time, purpose," she said as Jun’s engineers arrived.

One of them started to joke, then saw her face and stopped.

They signed.

They read the room rules posted beside the sink. Ten lines. No speeches.

No photos.

No external storage.

No runs without approved objective.

No runs without active logging and hash.

No unlogged tools.

No patient language.

No edits to software without ticket and review.

E-stop tested daily.

Consumables tracked.

If unsure, stop.

Victor walked in next, already holding a printed memo. He didn’t greet anyone. He handed the memo to Elena.

"Boundary statement," he said. "Internal R&D. Test rig. Non-clinical. Synthetic phantoms only. No claims. No interpretation language. It’s written so it reads like we’re scared, because we should be."

Elena scanned it once, then nodded. "Post it."

Hana took it and taped it beside the rules.

Maria arrived with a rolling case and a smaller box that clinked when she set it down.

"Tool inventory tags," she said. "And locks. So the tools stop walking."

Jun’s engineers watched her like she was overreacting.

Maria didn’t care. She opened the case and started labeling torque wrenches and meters with colored tags, then wrote serials on a sheet with neat block letters.

Jun came in last out of that group, face tight, coffee untouched.

"Where’s the thermal camera," he asked.

Hana answered without looking up. "En route. Automotive lab release approved. They’re bringing it up with security."

Jun nodded once. No thank you. No apology. He didn’t waste words when he was already angry at a drift event.

Elena arrived at 7:28.

She didn’t sit. She stood at the center of the room and looked at the Autodoc’s panel.

"Status," she said.

Jun’s engineer pointed. "Hashing routine is installed on the log export. Victor reviewed the output format yesterday."

Victor lifted his dongle slightly. "And I’m holding the token."

Elena turned to Victor. "Then we run."

Victor didn’t move yet. "Objective."

Jun answered. "Replicate drift on Sensor Array B under controlled conditions. Capture thermal profile. Correlate with calibration events. Identify cause."

Victor nodded and plugged the dongle in.

LOGGING: ACTIVE

CHAIN: LOCKED

SESSION ID: QC-MEDSYS-0002

HASH: ENABLED

"Now," Victor said, stepping back. "You can press your button."

Jun’s engineer moved to the panel, but Elena held up a hand.

"Before anything else," she said, "E-stop test."

Maria didn’t even look surprised.

Jun’s engineer exhaled through his nose and ran the routine. He initiated a dry-cycle movement check, then pressed the emergency stop.

The sensor frame halted instantly. Arms locked. Status lights changed.

The interface stamped it.

E-STOP TEST: PASS

RESPONSE TIME: 0.31s

RESET REQUIRED: MANUAL

Maria wrote it down. "Good. Do it daily."

They reset, logged it, and only then did Elena nod to proceed.

The thermal camera arrived with a guard.

Hana met them at the door and checked the serial number against the list. The guard signed the sheet, handed it over, and left without asking what it was for.

Jun’s engineer mounted the camera on a tripod aimed at the base where module B sat behind a panel.

Maria frowned immediately. "Trip hazard. Tape it."

They taped the tripod legs to the floor.

Jun didn’t complain. He watched the thermal camera feed populate. The base glowed in gradients. Hot spots showed up like bruises.

"Start baseline," Elena said.

Jun’s engineer began the scan.

The phantom they used was the same torso unit from yesterday. Same anchor points. Same barcode. Same positioning markers.

Maria insisted on gloves again, and no one argued this time.

The Autodoc ran the seven-minute baseline.

Three minutes in, the temperature on module B started climbing faster than module A.

Jun didn’t talk. He just stared.

At four minutes, the screen flashed yellow.

ALERT: SENSOR ARRAY B — DRIFT (0.9%)

AUTO-CORRECT: ATTEMPTING

ETA: 12 seconds

Victor leaned closer. "Mark time."

Jun’s engineer stamped an event marker in the log.

The thermal camera showed a sharp spike at the corner of module B, localized, like one component was cooking while the rest stayed stable.

"Stop," Jun said.

Maria’s head snapped to him. "Do you need to stop?"

Jun didn’t look away from the thermal feed. "Yes."

Elena didn’t override him. "Stop, controlled."

Jun’s engineer initiated a controlled pause. The system stepped down, held state, logged.

Maria pointed at the spike. "That’s not ambient."

Jun’s voice was flat. "That’s internal heat."

Victor looked at Elena. "This is a good stop. Logged. Repeatable."

Elena nodded. "Open the panel."

Hana stepped forward instantly. "Logged tool access. Who’s opening."

Jun pointed at his senior engineer. "You."

The engineer put on gloves, then used a tagged screwdriver Maria had just labeled. He removed the panel screws and set them in a tray.

Inside, module B’s board was visible behind shielding.

The thermal camera feed showed it still hot.

Jun leaned in and pointed to a corner component. "That regulator."

His engineer nodded slowly. "It’s running high."

Maria crouched. "Can it be swapped in the field?"

Jun looked at her like she’d asked him to amputate a limb with a butter knife. "Not in the field. Not like this."

Maria didn’t flinch. "Then this design never ships."

Elena didn’t say anything. She didn’t need to. Everyone heard it.

Jun’s engineer checked the board revision marking. "Prototype lot. Early board."

Jun’s jaw tightened. "We already knew that."

Victor took notes without looking up. "Document as prototype component. Document as non-shippable configuration. Document mitigation."

Jun exhaled hard. "Mitigation is redesign."

Elena finally spoke. "Which is why this stays in here."

They closed the panel back up and ran a second attempt with a forced cooldown between calibration steps. Same drift. Same heat spike.

It wasn’t a fluke.

Jun turned away from the machine and looked at Elena.

"We don’t waste time," he said. "Module B is trash. Replace the regulator design. Add thermal headroom. Or move the module layout."

One of his engineers hesitated. "If we move layout, we—"

Jun cut him off. "We do the work. Or we pretend and ship a failure."

Maria stood and pointed at the access panel screws. "Also. Tooling. Those screws are not field-friendly. You want a tired hospital engineer opening this? Change the fasteners."

Jun didn’t argue. He just nodded, annoyed that she was right on something he didn’t care about yet.

Victor looked at the panel and said, "And every change request gets a ticket tied to this session ID."

Jun’s engineer asked, "Do we have a ticketing system yet?"

Hana answered from the doorway. "We’re setting one up this afternoon. No more edits by chat."

The room went quiet for a second.

That was the moment Timothy walked in.

He didn’t enter the prototype room right away. He stopped at the threshold and read the posted rules, then the boundary memo. His eyes moved over Victor’s wording like he was looking for holes.

Elena noticed him and didn’t soften.

"We replicated drift," she said. "Thermal spike. Module B regulator."

Timothy nodded once. "Good. That’s actionable."

Jun didn’t greet him. He stepped closer and spoke like he was talking to an owner on a factory floor.

"This machine can’t be treated like a miracle," Jun said. "It’s hardware. It fails. If you want it to ever exist outside this room, we need design discipline. And we’re not there."

Timothy didn’t take offense. "Then we get there slowly."

Victor held up the dongle. "And we keep it documented. Because if this becomes a story, it becomes a liability."

Timothy looked at the screen where the session ID sat.

QC-MEDSYS-0002.

He nodded. "That stays. Every time."

Maria wiped her hands on a rag and looked at Timothy.

"I want to know something," she said. "Not how you built it. Not what’s classified. Just one thing."

Timothy waited.

"What comes first out there," she said, pointing beyond the door to the taped floor plan. "Because the longer this exists, the more people will want to chase it."

Elena answered before Timothy could.

"Power module," she said. "Field-stable. Serviceable. Registered. Sold with support."

Jun added, "And monitoring devices that survive brownouts."

Victor added, "And documentation that doesn’t pretend."

Hana looked at Timothy. "And no more ’surprise prototypes’ without sign-off."

Timothy didn’t argue. He kept his voice even.

"Understood," he said. "This stays contained. The ladder starts today."

Elena stared at him for a long moment, like she was checking if he’d really accept being slowed down.

Then she turned to Jun.

"Write the change requests," she said. "Tie them to this session. Then leave the machine alone until the next approved objective."

Jun nodded and motioned his engineers toward the workstation.

Victor unplugged his dongle and slipped it back into his pocket like he was putting a weapon away.

Maria rolled her case shut and locked it, then handed Hana a tool inventory sheet without being asked.

Hana took it and slid it into a folder labeled CONTROL.

Elena stood at the center of the room again, eyes on the Autodoc, then on her team.

"Good," she said. "Now we go build the boring thing."

She stepped out first, and the others followed, leaving the prototype room clean, quiet, and locked behind them, while the rest of the facility waited outside like an empty line waiting for its first real product run.