Tagged union for states

Distinct ID types

Explicit error sets

Non-exhaustive enum

Exhaustive switch handling

Comptime validation

Explicit comptime T type

Prefer const over var

Error union return types

Tests with testing allocator

No anyerror in signatures

Design notes present

Explicit allocator parameter

Arena allocator for batch

defer for resource cleanup

errdefer on error paths

std.testing.allocator in tests

No global allocation state

Slices over raw pointers

Explicit error set

const over var

Tests cover error path

NOTES.md memory explanation

comptime T: type over anytype

std.log.scoped used

Module-level log constant

err level for failures

debug level for tracing

catch block for error handling

No anytype in generic signatures

Explicit allocator parameter

Slices in signatures

Tests with testing allocator

const over var