Decimo v0.15.0

20260926 (v0.15.0)

Decimo v0.15.0 targets the codebase to Mojo v1.1.0, which removed a set of names that v1.0.0 had deprecated, and gives WordList the bounds checks.

⭐️ New in v0.15.0

1. WordList checks its bounds as List does. It checked nothing when it replaced List in v0.14.0. Now x[i] is checked in every build but -D ASSERT=none, and unsafe_get() and unsafe_set() under -D ASSERT=all. A negative length is refused as well, since the check compares as unsigned and a length of -1 would let every index through. Costs between nothing and 7% of an operation (PR #319).

🦋 Changed in v0.15.0

1. Mojo v1.1.0 migration (PR #318). InlineArray is Array, SIMD comes from std.simd, Atomic takes a value type rather than a DType, Hasher.update() takes bytes, String(capacity=) is String(capacity_bytes=), memcmp() is unsafe_memcmp(), and a capturing @parameter closure is @__parameter. Pixi pins mojo >=1.1.0,<1.2.0 and argmojo 0.9.0 (PR #320).
2. decimo.wordlist is decimo.word_list. It is internal: the package exports Magnitude, not WordList (PR #319).

🩹 Fixed in v0.15.0

1. BigFloat.root() raised "Root degree is too large" for every degree on Mojo v1.1.0, root(3) included. Its guard read n > Int(UInt32.MAX), and v1.1 folds that constant to -1 (modular/modular#7154), so the guard refused everything. The bound is thus written as a literal now (PR #318).
2. The CLI build never took argmojo from the environment: its probe program used fn main(), which v1.1 rejects, so it failed even where the package was installed (PR #318).

💥 Breaking in v0.15.0

1. Decimo requires Mojo v1.1.0, pinned >=1.1.0,<1.2.0.