Fixes from the PR #26 adversarial review (graded 18 real / 0 false positive).
Correctness / security
- maxGardenCM fixed to 10_000 (100 m), matching its comment — it was
100_000 cm (1 km), 10x too lax (5 models flagged this).
- Dimension validation now rejects NaN/Inf (which slip past naive
comparisons) and subnormal-tiny positives, via a finite [1cm, 100m]
check. Name (200) and notes (10_000) are length-capped so untrusted
input can't balloon storage.
- Update version binding is `required,min=1`, so a negative/zero version
is a 400, not a 409.
Maintainability / performance
- One unified writeServiceError (new errors.go) maps every auth + resource
sentinel; writeResourceError removed. writeVersionConflict and
parseIDParam moved to errors.go (shared, not in the gardens feature file).
- Request structs share an embedded gardenFields (one toInput).
- CreateGarden uses INSERT ... RETURNING (one round-trip).
- ListGardensForOwner has a defensive LIMIT (pagination is post-v1).
Tests: name/notes length, NaN/Inf/subnormal dims, dimension-at-cap valid,
negative/zero version -> 400.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01JdQpdYYsTgtkJBxbcpAszi