fdd0b72b7a
The complement to the per-function compare harness. Instead of "did this function's declared outputs match", it asks "is the entire simulation state still identical" -- so no region-declaration mistake can hide from it. Coverage is PROVED, not declared: the digest tree is re-serialised and compared byte-for-byte against the inflated save on every run. When that reconstruction reproduces the stream, the whole file is a function of the digest's inputs. A run that cannot account for the file says so and exits non-zero. This is the direct answer to B4's three hooks that printed "0 diverged" over an empty region set. It localises. The root is the fold of a per-subsystem / per-object tree with named objects, so the known load->re-save delta reports as exactly five leaves -- /Summary/Checksum and four /Sim/players/Player[...]/Status 4->0 -- naming the two Singularity players by id where the raw byte diff could only say "1st of two". One real End Turn reports as 108 fully attributed differences. Float-parity policy is explicit and strict by default (STATE_CHECKSUM.md 3): raw IEEE-754 bits; a `canonical` policy for signed zero and NaN payloads only; and deliberately NO tolerant hashing mode, because quantisation moves the cliff rather than removing it and destroys the roll-up. Tolerance lives in the differ as --ulps, applied after localisation. Corpus census: 0 NaN, 0 -0.0, 0 subnormals across 4,474 float leaves, so the strict default costs nothing today and a test fails the day that changes. Validated on the real saves (verify/results/state-checksum/): 10 files, 4 distinct contents, all STABLE + COVERED; chain record/verify works on the real turn1-3 saves. The VM-driven replay loop is designed (section 5) but UNRUN. Section 3.5 names the one question the host side cannot settle -- whether the turn pipeline depends on x87 intermediate precision -- and the experiment that would: force fpu_cw to 0x027f / 0x127f / 0x137f across End Turn and checksum the three autosaves. Also recorded: Summary.Checksum is NOT a byte sum over the inflated stream nor a sum over the int leaves (both ruled out), so nobody repeats those two. 38 tests; sots-engine untouched, clean_room_check.sh OK.
13 lines
714 B
Text
13 lines
714 B
Text
reader fingerprint: fe5a6f7cd4ae7910
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10 file(s), 4 distinct content(s)
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sha256:978041acd168b56e 2 file(s) STABLE + COVERED
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root 5ac4a24197e82de49f3077cd8dd25fad Autosave - turn3.sav, turn3-state.sav
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sha256:a3f9dc4b49fc669c 2 file(s) STABLE + COVERED
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root 9bbcbd4945cd8319b65d7d7958772ee0 Autosave EndTurn - turn2.sav, turn1-state.sav
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sha256:ab4ac2d7e2977260 3 file(s) STABLE + COVERED
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root aa85fe76d412cdb3a0e7e52c8f0ca9e2 Autosave - turn2.sav, Autosave Backup - turn2.sav, turn2-state.sav
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sha256:bb4fd9ac89f41e3b 3 file(s) STABLE + COVERED
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root a1448e6c1867fc53708810b3a2f9ec77 Autosave EndTurn - turn3.sav, MyGameverify1verify1.sav, verify1.sav
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VERDICT: all stable and fully covered
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