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## Control flow

- **Postfix `if`/`unless`** for guards and short conditions: `croak(...) if $self->readonly;`
- **`unless $x`** instead of `if !$x`.
- **Guard clauses return bare:** `return unless $res->is_success;` — not `return undef;`.
- **Nested ternaries** for a return that picks between expressions, instead of an if/elsif chain.

## Data

- **`{ %hash }` and `\%hash` are different operations, not two styles.** `{ %h }` builds a new anonymous copy; `\%h` references the existing hash. Return a copy when the caller must not mutate your state; return the reference when sharing is the poin...
- **`Path::Tiny`** for every file operation — not `File::Spec`, not bare `open`. `path(...)->child(...)->slurp_utf8`.
- **`JSON::MaybeXS`** always — never `JSON::PP`, `JSON::XS`, `Cpanel::JSON::XS` directly. Encoders get `canonical => 1, convert_blessed => 1`.
- **Every serialiser is deterministic.** MessagePack `->canonical`, DBIC `serializer_options => { canonical => 1 }`. Same rule, every format.
- **Booleans: `JSON->true` / `JSON->false`.** `use JSON::MaybeXS;` covers codec and booleans.
- `$YAML::XS::Boolean = 'JSON::PP'` is one of YAML::XS's fixed mode names, not a module choice — leave it alone.
- **Align `=>` in multi-line hash literals** when keys are of similar length.
- **Optional pairs inline:** `$cond ? ( experimental => 1 ) : (),`

## Configuration

Config comes from environment variables prefixed with the project name