Read it as a build sequence

The reference pages define the product. The new work cards explain how to perform the next operation and what to inspect before continuing.

Stable operation IDs are preserved across revisions. The PDF bookmarks, page index and companion tracker refer to the same activities. A workshop method is an instruction, not a physical PASS record.

A build release, not another redesign

DG03 retains the approved COWL and MOLT CORE references. Pages 1–75 keep their original positions; new execution cards are on pages 76–88.

Find the next operation

Read each retained reference page with its following workshop cards. Page numbers and PDF bookmarks refer to this DG03 edition.

Orient the wearer and the cloth

“Left” means the wearer’s left. “Right side” means the intended exterior face of the fabric. These are different instructions.

Count cut layers, not repeated labels

This reconciliation is derived from the inherited COWL inventory. It counts physical textile pieces—not pattern masters, metres or MOLT carrier parts.

Prepare fabric without changing its behaviour

The sample allowances are a purchasing estimate. Actual usable width, orientation and the accepted marker determine consumption.

Set the machine on a real seam stack

Make the sewing setup repeatable before working on a large shell panel. Test thin seams and reinforced seams separately.

Prove closures, binding and seam tape

A closure can look neat on the bench yet tear the supporting textile or block module removal. Test the complete stack.

Verify the paper before the scissors

A contour envelope cannot reveal a seam curve, intended ease, a fold extension or a notch location. Use the actual native file.

Make the first sample easy to correct

The toile must prove the full silhouette and access, not just a sleeveless torso that cannot reveal the real problem.

Sew the pocket opening before cutting it

Work on one flat front at a time, but compare both fronts before slashing either opening.

Install the zip and build the bag

The zipper controls hand entry. The two U pieces form the pocket volume behind it; the outer shell must stay free of the bag-closing seam.

Balance a two-way separating front zip

The closed zip is the alignment jig. Use it to compare the two fronts before the final seam fixes their relationship.

Turn Q without reversing the design

An asymmetric piece can be cut in the right quantity and still end up on the wrong side. Confirm its finished orientation before sewing.

Assemble the back without trapping W

R and W contribute to the layered back. Their native attachment paths determine which edges join and which edges must move.

Prepare both sleeve assemblies while flat

Finish the shield and cuff-tab attachment before closing the underarm. The sleeve is then inserted as one closed unit.

Walk, baste and turn the cowl assembly

Treat D–E–D and F as one fit problem. A neat hood seam does not prove that the finished collar and neck opening work together.

Set the closed sleeve into the closed body

This edition uses one consistent method: prepare and close the sleeves; close the body sides; then set in each sleeve.

Build adjustment without damaging the edge

Use the native hem line and casing layout. Intentional asymmetry is not a defect to trim away.

Prove the service opening at its finished size

G, H and J are flat pattern envelopes. Neither the rectangle nor its label proves that the complete caddy can pass through it.

Build K, L and N around their actual jobs

The optical window, acoustic port and haptic contact pad require different structures. Keep their blanks and tests separate.

Make one lift-open channel coupon first

DG01 proposes a fixed hinge edge and a lift-open opposite edge. Validate that construction before making the four garment channels.

Join the lining without twisting the cuffs

Keep enough construction access to verify the lining before the final turning opening or hem edge is closed.

Seal while you can still reach the seam

Plan access seam by seam. A finished lining must not prevent the tape process, inspection or any later correction.

Fit the carrier before trimming straps

The MOLT pattern remains a separate required input. These instructions explain fitting and load-path checks, not a newly invented carrier shape.

Register all six interfaces on the wearer

RA reinforces the garment-side interface. The six attachments register COWL to MOLT; they must not turn the shell into the main suspension system.

Make an inert module that represents reality

Measure the complete assembly, not the bare PCB. Then build a mock-up that includes the parts most likely to foul a service opening.

Make a harness from a pin schedule

Freeze each connector’s actual family and mating view before cutting a batch of wires. A colour or a housing name is not an electrical definition.

Make the bench readable before adding parts

Use named boards and net labels. Do not assign breadboard row numbers until the actual board and rail continuity have been checked.

Wire and verify the first five inputs

Start with Pico 2, four momentary buttons and the NC tamper contact. Leave sensors, radios, motors and external power feeds disconnected.

DG03 executable companion: pages 82–84 and firmware/black_input_check.py. This is a USB-only, input-only diagnostic, not the complete LAB-0 runtime.

Bring up screen, buttons, then the radio

S3-C is the service pod. The source assigns its display and CC1101 to a shared SPI bus with separate chip selects.

Test the one-way link in a visible sequence

Use a bounded RED-side test source before live observer traffic. Measure signals only with an instrumentation setup that preserves the two domains.

Prove that a disabled rail is really off

An enable signal going LOW is not the result. Measure the switched supply and each signal path under realistic off-state conditions.

Verify the divider before connecting the ADC

DG01’s 10 kΩ / 10 kΩ candidate adds conversion-range headroom. It still needs a measured source envelope, settling check and power-off test.

Add the trusted bus and haptic in stages

Keep the first working core record. Add communication first, then the load that can disturb its supply.

Add one sensor, then prove storage isolation

Begin with the identified switched-rail circuit working. Leave unresolved interfaces disconnected instead of using them to mask a failure elsewhere.

Record what actually ran

The guide is an assembly document, not a supplied full-system firmware release. A compiled sketch, a successful flash and a stable hardware run are different evidence.

DG03 supplies a five-input diagnostic and host-side logic tests (pages 82–84). It does not supply the complete BLACK/RED application, watchdog acceptance, RF calibration or observer aggregation.

Run a repeatable 30-minute fitting test

Use the measured inert carrier first. The schedule below operationalises the source’s 30-minute movement target; it is not a claimed completed test.

Write and test the removal sequence

A serviceable prototype must come apart without unpicking. Time the real sequence with the garment in its actual wearing arrangement.

Find the failed block before adding another

Keep a reproducible baseline. Disconnect or substitute one known part at a time with power removed before rewiring.

Turn the open items into concrete records

The remaining dependencies are narrow. Keep work moving on the independent tasks while recording exactly what each blocked operation needs.

Keep the build state outside the chat

The DG03 tracker preserves the 54 DG02 activity IDs and adds 13 execution cards. It contains no prefilled physical results.

Inherited and freshly checked evidence

The 75-page DG02 file is the controlled baseline for this edition. The source register on page 74 remains the authority map for the retained manufacturing and hardware references.

Finish a useful first work session

Start with work that produces evidence now. Do not let the missing native pattern stop electrical identification, seam coupons or measured module mock-ups.

Check the work before access disappears

Perform these inspections while the panel is flat or the assembly is still open. Do not discover a trapped part after topstitching or bagging the lining.

Transfer zipper landmarks as a pair

Use the actual #5 two-way separating zip and the matched native front/facing pieces. The inherited 700 mm trim length is not a new finished seamline measurement.

Write an edge ticket before cutting

A piece envelope describes storage space. A seamline describes the join. A cut line includes the specified allowance. Keep all three distinct on the work copy.

Measure the module in its connected state

A caddy must fit the complete module and allow its removal. The disconnected board dimensions are only one input.

Make six interfaces return to the same place

Register COWL to the fitted, inert-loaded carrier. The interface coordinates come from the actual pattern and fitting, not positions measured from a front-view image.

Connect five inputs without ambiguity

Use only the bare non-wireless Pico 2 and passive contacts. This card expands page 53; it does not revise the LAB-0 allocation on page 52.

Run the supplied bench diagnostic

The toolkit includes two complete MicroPython files: input_logic.py and black_input_check.py. This program reads contacts and prints JSON lines over USB; it does not command external outputs.

Actual output types to look for:
{"type":"boot", ...}
{"type":"snapshot", "reason":"initial", ...}
{"type":"button", "name":"MODE", "level":0, ...}
{"type":"tamper", "level":1, "state":"OPEN", ...}
{"type":"snapshot", "reason":"heartbeat", ...}

Test the events, not just the screen

Use a real shell log from page 83. Compare each contact action with its corresponding field; simultaneous contacts must not masquerade as one button.

Keep instruments from joining the domains

A separated BLACK/RED circuit can be joined accidentally through USB shields, oscilloscope ground clips or a computer. Draw the measurement connections as part of the test fixture.

Close the garment only after service works

Do this with inert modules. The last lining opening is an inspection route until the whole carrier and all electronics can be removed without cutting a seam.

Know what a change invalidates

Use this matrix to reopen the affected records. The tracker keeps evidence; it cannot decide that an old result is still representative of changed hardware or cloth.

Use one controlled build package

DG03 combines the guide, executable diagnostic and portable build records. Keep source facts, workshop methods and measurements in separate evidence classes.

Current public technical references

T01: Raspberry Pi Pico-series documentation and pinout.
T06: MicroPython for non-wireless Pico 2; Pin API; time / ticks_diff API. Checked 19 September 2026.

Store document entry point

murmur.qd.je / pages / system-001-build-guide. The publication record identifies the uploaded file and page readback. Store images are design-development visualisations, not photographs or physical acceptance evidence.