@tenets/result

Result<T, E> / ResultAsync<T, E> with ok, err, isOk, isErr, map, mapErr, andThen, match, unwrapOr, combine, trySync, tryAsync — typed recoverable failures as values.

The tenets ruleset's TypeScript profile fixes these API names (Rule 7.6); your project guide records where the package lives.

Credit

The API shape follows neverthrow, the library that made Result types idiomatic in TypeScript, with lineage back to Rust's Result, fp-ts's Either, and Scott Wlaschin's railway-oriented programming. This package exists for a smaller, stricter core:

• Zero dependencies, plain frozen objects — ok/err return frozen discriminated literals ({ ok: true, value }), so results serialize, structurally compare, and cross boundaries without class-instance identity problems.
• Thenable async composition — await resultAsync yields Result<T, E> directly.
• combine for first-error aggregation, and consumed-result discipline designed to pair with the ruleset's prohibitions (no dropped Results, no invariant laundering).