§ Live · build log · as of 2026-04-20

Crucible governing a real build, in real time.

ComfortSense is the reference implementation of the Crucible framework — an HVAC sensing device being built on nRF52840 Sense silicon under the same constitution we ship to customers. Every stage gate, every ruling, every blocked toolchain is recorded below as it happens.

Current stage
00 → 01
HIL toolchain lock closed. Simulation opens next.
Toolchain
LOCKED
Ratified under Amendment 3 · 2026-04-20.
Governance
3 rulings · 1 block
Case 1, Case 1.1, Amendment 3. PlatformIO blocked.
§ Stage gate record

Gates closed under evidence, not under pressure.

Per Amendment 2, Stage N cannot open until Stage N-1 is CLOSED here. This table is the authoritative record.

  1. SPEC

    Device specification

    2026-04-16
    Amendment 1 ratified.
    CLOSED
    Stage SPEC · walkthrough — Specs → primitives · Crucible-Comfort
  2. 00

    Toolchain search & smoke tests

    2026-04-20
    All four gates PASS. Toolchain LOCKED. Unlock requires a new Judicial Hearing per Amendment 3.
    CLOSED
    Stage 00 · walkthrough — Toolchain lock · Crucible-Comfort
  3. 01

    Simulation

    —
    Physics model of the device domain. Renode bridge + Auto-PINN.
    NOT STARTED
    Stage 01 · walkthrough — Simulation walkthrough · Crucible-Comfort
  4. 02

    Firmware on dev kit

    —
    Moving code onto physical components.
    NOT STARTED
    Stage 02 · video at gate close▶ placeholder
  5. 03

    Field test

    —
    Real measurement data replays back to simulation.
    NOT STARTED
    Stage 03 · video at gate close▶ placeholder
  6. 04

    Host integration

    —
    Smart-home gateway, cloud deployment.
    NOT STARTED
    Stage 04 · video at gate close▶ placeholder
§ Device under governance

The silicon on the bench.

Physical ground truth. Every parameter below traces to a datasheet row per Article I.

Board
Seeed XIAO nRF52840 Sense
MCU
nRF52840 · Cortex-M4F @ 64 MHz
IMU
LSM6DS3TR-C
Microphone
MSM261D3526H1CPM (PDM)
Build
arduino-cli 1.4.1
Core
Seeeduino:nrf52 v1.1.12
FQBN
Seeeduino:nrf52:xiaonRF52840Sense
Flash
UF2 drag-drop
Simulation
Renode 1.16
Serial
115200 8N1
§ Judicial record

Rulings and amendments, in chronological order.

Agents execute. Humans decide. Every non-reversible change is archived here under Article II.

  1. Amendment 32026-04-19

    Toolchain Alignment ratified

    The toolchain record becomes a live implementation file. Any change to the active toolchain requires updating the record and ratifying or amending Amendment 3.

Why this page exists

Engineering governance is only real if you can read the record.

Every stage gate, ruling, and blocked toolchain on this page is generated by the same framework we ship. If you are building a wearable, an HVAC device, or anything where physics bites back, this is what accountability looks like.

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