docs: update protocol reference with v0.9.0 erase-all protocol
Changelog section:
- 5 new entries (2026-04-11): erase-all confirmation, SUB 0x06 purpose
resolved, §7.11 added, §14.6 ACH session lifecycle marked IMPLEMENTED
§5.1 Request Commands:
- SUB 0x06 description updated: "EVENT STORAGE RANGE READ" (not "CHANNEL
CONFIG READ"), token=0xFE, last 8 bytes = first/last stored event keys
- SUB 0xA3 added: ERASE ALL BEGIN — standard build_bw_frame, token=0xFE, ack 0x5C
- SUB 0xA2 added: ERASE ALL CONFIRM — standard build_bw_frame, token=0xFE, ack 0x5D
§5.2 Response SUBs:
- 0x06→0xF9 marked CONFIRMED 2026-04-11
- 0xA3→0x5C and 0xA2→0x5D added with CONFIRMED status
§7.11 (new section): Erase-All Protocol
- Full wire sequence (6 request/response pairs)
- SUB 0x06 storage range payload layout (36 bytes, last 8 = first/last key)
- Post-erase key counter reset: device restarts from 0x01110000
- Implementation notes pointing to client.py and ach_server.py
§14.6 ACH Session Lifecycle:
- Removed "Future" label — fully implemented in bridges/ach_server.py
- Added step 6 (optional erase), step 8 (DCD/DTR auto-resume)
- Documents ach_server.py flags and ach_state.json schema
- Notes RV55 DCD/DTR issue as known open problem
Open Questions table:
- SUB 0x06 purpose RESOLVED
- Erase-all sequence RESOLVED
- ACH server RESOLVED
- Sensor Check byte: still open, added as formal question
- RV55 DCD/DTR: added as new open question
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
claude
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