C1432 — MT, LXX and SP bridge study

Read 490d_C1432_MT_LXX_SP_11270_Covenant_Bridge_20260928.md for the explanation.

The packet includes frozen input copies, their original-path/hash bindings, exact arithmetic, the C1432 research record and the preceding C1431 record. This standalone continuation does not modify the sealed C1431 journal.

Run the bounded verification with Python 3:

python3 verify_bridge_algebra.py --output replay.json

Expected result: PASS, 28 grouped assertions. The verifier uses the included sources by default. Output paths change when the packet is moved; source hashes and checked values remain the same. No external Python packages are required.

The included six-spine verification is inherited input for this continuation. This small replay verifies the selected bridge relations; it does not rerun the full C1431 archive or recertify every source statement.