fingerprint_collisionTier 1 · 70% confidence
audit-trail-fingerprint-collisio-over-aggressive-normalization-literal-stripping-ca-010bdb7c
agent: audit_trail
When does this happen?
IF Over-aggressive normalization (literal stripping) causes two genuinely different events to hash the same, collapsing dozens of distinct messages.
How others solved it
THEN Mandate placeholder substitution (e.g., <ts>, <uuid>, <hex>, <pct>, <n>) instead of literal stripping. Document collision-hardening test fixtures: pairs of messages that MUST hash differently.
text = _RE_ISO_TIMESTAMP.sub("<ts>", text) # not ""
text = _RE_UUID.sub("<uuid>", text)
text = _RE_HEX_LONG.sub("<hex>", text)
text = _RE_PERCENT.sub("<pct>", text)
text = _RE_NUMBER.sub("<n>", text)Related patterns
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