validation-discounts: driving cases → the settled validation-only model (all
money/paper at the booth) → setup UX/storage/RBAC → full as-built record.
DECIDED: merchant stations scan with a USB/HID barcode scanner on the
web/desktop app (hand-keying + Luhn as fallback); POSTPONED with analysis:
web getUserMedia scanning (secure-context TLS prerequisite on the LAN +
Code128-via-camera weakness → QR-on-ticket first) and a Tauri v2 Android
merchant app (native ML Kit scanning; Android build/sideload overhead +
configurable-server-URL prerequisite). Also: wsl-dev-networking gains the
mirrored-mode gotcha where a Windows-side listener makes a port EADDRINUSE
inside WSL while invisible to ss — Vite auto-increments and tauri dev's fixed
devUrl waits on the wrong port.
Claude-Session: https://claude.ai/code/session_01YYkpEsLmoQPaize5ec3oUm
Mirrored mode re-clones the Windows NIC's addresses each boot, so the kernel
keeps picking the wrong source for stacked device subnets (10.0.10.x sourced
from 192.168.1.123) — ARP resolves but ping/TCP dies, and every runtime
ip-route fix is wiped by wsl --shutdown.
deploy/wsl-fix-route-source.sh pins each scope-link route's src to this
host's own address in that subnet (no hardcoded IPs, idempotent, preserves
metric, non-fatal per route, waits for the route at boot). deploy/parking-net
.service reapplies it on every boot.
Dev-box only; the appliance is bare-metal Linux with static networkd config.
Verified: camera pings with no -I flag; driver pulls a snapshot with no
localAddress set.
Capture hard-won dev knowledge that was only in commit messages:
- wsl-dev-networking: WSL2 NAT blocks UDP broadcast (device discovery can't
reach the LAN); fix is mirrored networking (.wslconfig, Win11 22H2+), plus the
gotchas that remained after — multiple interfaces, subnet-directed broadcast,
localhost->IPv6 stall. Alternatives for non-mirrored setups.
- local-dev-workflow: first-time setup, pnpm dev, and the gotchas (the
strip-types dev-server hang -> tsx, the 127.0.0.1 proxy fix, .env loading,
seeding into the right DB).
- device-discovery: corrected the old "broadcast permission (EACCES)" note — the
real cause was the lib not enabling SO_BROADCAST for global 255.255.255.255;
documented the three verified broadcast gotchas + I/O serialization.
- schema: add a `reference` page type; new "Dev environment" index section; log.
Links lint clean; both new pages well-connected.
julian