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Cut 9: re-anchor cut3 and cut6 onto the mixed seed

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9.1 changed the line those two harnesses pin, stranding five anchors including
cut6's own no-op control -- so cut6 was defending nothing until now. Same thing
the diagnostics refactor did to four harnesses earlier, and the second time in a
day that a change to Commit has stranded anchors elsewhere. The rules are
unchanged; only the text moved.

That maintenance cost is now a known property of pinning mutations to literal
source text. It buys a stale anchor failing loudly within one run, which is how
both instances were caught immediately, and it belongs in Cut 10's list beside
Soul's harness audit.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-09-22 03:01:04 +02:00
commit 73e080d8d6
2 changed files with 9 additions and 9 deletions
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8
tests/mutation_tests_fire_control_cut3.sh
View file

@ -7,7 +7,7 @@
#
# OutOfArcConsumesNoDraw no longer exists. It asserted against ItemManager.Random (`e.Items.Random`), but
# Cut 6b (6.1) moved every shot's roll onto its own freshly-seeded, immediately-discarded
# `new Random((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u)` local to Commit -- a deliberate,
# `new Random(MixSeed((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u))` local to Commit -- a deliberate,
# good change (reproducibility independent of unrelated draws elsewhere) that also meant Commit stopped
# reading or writing ItemManager.Random on any path, arc or no arc, which made the old test's own declared
# mutation ("roll first and multiply by zero") pass for a reason that had nothing to do with arcs. Cut 7
@ -197,7 +197,7 @@ check_mutation \
check_mutation \
"RollsAreSeeded: Commit's draw must be a pure function of (zone, shot id), not fresh entropy per call" \
"$FIRE_CONTROL_CS" \
'var random = new Random((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u);' \
'var random = new Random(MixSeed((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u));' \
'var random = new Random((uint) System.Guid.NewGuid().GetHashCode() | 1u);' \
"FireAuthorityTests.RollsAreSeeded" \
"red"
@ -350,8 +350,8 @@ check_mutation \
check_mutation \
"CombatNeverDrawsFromTheSharedStream: Commit must never read ItemManager's shared stream, on any path" \
"$FIRE_CONTROL_CS" \
'var random = new Random((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u);' \
'var random = new Random((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u); shot.Source.ItemManager.Random.NextFloat();' \
'var random = new Random(MixSeed((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u));' \
'var random = new Random(MixSeed((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u)); shot.Source.ItemManager.Random.NextFloat();' \
"FireAuthorityTests.CombatNeverDrawsFromTheSharedStream" \
"red"

10
tests/mutation_tests_fire_control_cut6.sh
View file

@ -194,8 +194,8 @@ check_mutation() {
check_mutation \
"control (no-op round trip)" \
"$FIRE_CONTROL_CS" \
'var random = new Random((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u);' \
'var random = new Random((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u);' \
'var random = new Random(MixSeed((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u));' \
'var random = new Random(MixSeed((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u));' \
"FireControlCut6Tests.SameFightRollsSameThroughUnrelatedDraws" \
"green"
@ -206,7 +206,7 @@ check_mutation \
echo ""
echo "=== 6.1 Commit must not read or write the shared ItemManager.Random stream (expect red) ==="
if replace_unique "$FIRE_CONTROL_CS" \
'var random = new Random((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u);' \
'var random = new Random(MixSeed((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u));' \
'var random = shot.Source.ItemManager.Random;' \
&& replace_unique "$FIRE_CONTROL_CS" \
'return MakeOutcome(shot, hit, shielded, shieldBroken, cell, aimed, now);' \
@ -224,8 +224,8 @@ fi
check_mutation \
"6.1 ShotId must reach the seed" \
"$FIRE_CONTROL_CS" \
'var random = new Random((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u);' \
'var random = new Random((zone.CombatSeed * 2654435761u) | 1u);' \
'var random = new Random(MixSeed((zone.CombatSeed * 2654435761u) ^ (uint) shot.ShotId | 1u));' \
'var random = new Random(MixSeed((zone.CombatSeed * 2654435761u) | 1u));' \
"FireControlCut6Tests.ShotIdDecidesTheDie" \
"red"