20 cross-validation checks PASS against [secs4java8] (Apache 2.0,
kenta-shimizu) — an independent SECS/HSMS implementation in Java by
a different author from a different language ecosystem. Distinct
implementer = independent spec interpretation. Two libraries
agreeing on wire bytes is much stronger evidence of spec-correctness
than either alone.
Coverage targets the gap the secsgem-py interop deliberately skipped
(secsgem-py's SFDL grammar couldn't easily express GEM 300 bodies
with variable lists of named scalars):
- S1F1/F13/F17/F19/F21/F23 — establish comms + namelists
- S2F17 — clock
- S2F23 — trace init (5-field body)
- S2F49 — enhanced remote command (DATAID + OBJSPEC + RCMD + params)
- S3F17/F19/F25/F27 — full E87 carrier surface (action, slot map
verify, transfer with port pair, cancel)
- S5F13/F17 — exception recovery (EXID + EXRECVRA)
- S14F9/F11 — E94 CJ create with prjobids list, CJ delete
- S16F5/F27 — E40 PJ command, E94 CJ command
- S1F15 — offline cleanup
20/20 PASS against the demo equipment. Reply S/F matches the spec
for every transaction; specific ACK values vary by equipment state
(CarrierIDUnknown for an unknown carrier is just as valid as Accept
for a known one) so we assert on the wire shape, not the result.
Ship layout:
interop/secs4j/Dockerfile — eclipse-temurin:21-jdk + clone
+ build of secs4java8 → Export.jar
interop/secs4j/Secs4jHostHarness.java
— 20 round_trip assertions; uses
Secs2.list/uint4/ascii to build
full GEM 300 bodies; comm.send()
for arbitrary S/F pairs
interop/secs4j_validate.sh — orchestrator: builds image,
compiles harness, starts compose
server, runs Java container on
the secs network against it
.gitea/workflows/ci.yml — secs4j-interop job in CI
README.md — proof table grows to 7 commands
.gitignore — *.class
After this commit our proof chain has:
- SEMI E5 KAT (standards body's own arithmetic)
- tshark dissector (Wireshark's HSMS impl)
- secsgem-py interop (Python reference impl)
- **secs4j interop** (independent Java impl)
+ 426 unit tests, 47 conformance harness checks, 100k random ops,
YAML validation
Four independent external proofs, three of them on overlapping wire
surface from independent angles.
Plan: VERIFICATION.md §3.
[secs4java8]: https://github.com/kenta-shimizu/secs4java8
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
