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james.maesandClaude Fable 5.2 537e56d744
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perf(policy): one permission universe per resolution; PolicyResult.replacement
A host's authentication customizer runs on every request of a session. Policy
resolution read the live permission universe once for every Allow term, and each
reading recomputed the PolicyCatalog fingerprint, walked every catalog resource
and called every host-name function. A role of nine named permissions therefore
built nine universes per request; a full-access document built one.

- PolicyRules.allowed, resolve and withheld read the universe they are given once
  per call (PolicyUniverse.once), so resultFromClaims, fromClaims, both claims
  mappers, the access editor and AuthentikAdmin cost one universe per resolution
  whatever the policy holds. PolicyParser.parseForSave reads it once per document.
- PolicyCatalog.of compares the instance with the kept fingerprint piece by piece
  instead of building the fingerprint text on every call; the same content is
  compared, so every in-place metadata change still gives a new catalog on the
  next call. The catalog keeps its permission names and its part of the universe.
- Nothing is cached across resolutions: no universe, no decision. The catalog
  cache is per JVM and derived only from that JVM's instance, as before.
- PolicyResult.replacement(): the grant alone (Allow minus Deny), for a host whose
  sessions take their permissions only from the token. apply() is unchanged and
  remains a union with what the host passes.

Measured on a 1,400-object instance (212 tables, 985 processes, 199 widgets), one
resolution: 9 named permissions 12.1 ms and 7.9 MB to 0.33 ms and 0.12 MB; 30
named 28.7 ms and 25.3 MB to 0.32 ms and 0.14 MB; full access 1.19 ms and 1.37 MB
to 0.77 ms and 0.20 MB.

Tests: PolicyResolutionCostTest counts universe builds (1 for 1, 9 and 30 names,
0 for a void or absent claim), pins that one reading grants exactly what a reading
per term grants, and holds an allocation budget; PolicyCatalogTest changes every
fingerprinted aspect in place. The golden vectors are untouched and pass.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
2026-11-10 18:51:54 -06:00
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