Roadmap and repos: decoder live; signal layouts in contracts' signals.json

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

docs/ROADMAP.md

@@ -62,8 +62,11 @@ mark …`, or the app's Mark button), on the same clock as the frames.
 - [ ] Correlate captures against the event log; identify recurring frame IDs —
       prior art and first candidates (engine speed in `0x210` / `0x13D`) in contracts
       `docs/impl/reports/Z27AG-CAN-PRIOR-ART.md`
-- [ ] Build the Z27AG DBC incrementally in `contracts`
-- [ ] `decoder` — raw frames to named signals
+- [ ] Build the Z27AG signal set incrementally in `contracts` — in `signals.json`'s
+      `can` blocks, not a hand-kept DBC (one is generated if a tool needs it)
+- [x] `decoder` — raw frames to named signals, 2026-10-13: svc-core `decoder`, laid out
+      only by the `can` blocks in contracts `signals.json` (rpm, accelerator, brake,
+      handbrake, indicators, side lights, dipped beam, doors, A/C compressor)
 - [x] `obd-poller` — active OBD-II PIDs, single writer, 2026-10-12: mode 01, the
       nine `obd2` signals (~10 Hz fast, 1 Hz slow), only while the bus is alive;
       `can_pcan` out of listen-only. Recorded beside the frames (`vehicle.ndjson`).