## 🤖 New release

* `hugr-model`: 0.25.7 -> 0.26.0 (✓ API compatible changes)
* `hugr-core`: 0.25.7 -> 0.26.0 (⚠ API breaking changes)
* `hugr-llvm`: 0.25.7 -> 0.26.0 (✓ API compatible changes)
* `hugr-persistent`: 0.4.7 -> 0.5.0 (✓ API compatible changes)
* `hugr`: 0.25.7 -> 0.26.0 (✓ API compatible changes)
* `hugr-passes`: 0.25.7 -> 0.26.0 (⚠ API breaking changes)
* `hugr-cli`: 0.25.7 -> 0.26.0 (✓ API compatible changes)

### ⚠ `hugr-core` breaking changes

```text
--- failure enum_struct_variant_field_added: pub enum struct variant field added ---

Description:
An enum's exhaustive struct variant has a new field, which has to be included when constructing or matching on this variant.
        ref: https://doc.rust-lang.org/reference/attributes/type_system.html#the-non_exhaustive-attribute
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/enum_struct_variant_field_added.ron

Failed in:
  field pkg of variant LowerFunc::FixedHugr in /tmp/.tmpGqHhMb/hugr/hugr-core/src/extension/op_def.rs:312

--- failure enum_struct_variant_field_missing: pub enum struct variant's field removed or renamed ---

Description:
A publicly-visible enum has a struct variant whose field is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/enum_struct_variant_field_missing.ron

Failed in:
  field hugr of variant LowerFunc::FixedHugr, previously in file /tmp/.tmpqeiszk/hugr-core/src/extension/op_def.rs:303

--- failure enum_variant_missing: pub enum variant removed or renamed ---

Description:
A publicly-visible enum has at least one variant that is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/enum_variant_missing.ron

Failed in:
  variant BuildError::HugrInsertionError, previously in file /tmp/.tmpqeiszk/hugr-core/src/builder.rs:186
  variant EnvelopeFormat::ModelText, previously in file /tmp/.tmpqeiszk/hugr-core/src/envelope/header.rs:60
  variant EnvelopeFormat::ModelTextWithExtensions, previously in file /tmp/.tmpqeiszk/hugr-core/src/envelope/header.rs:70
  variant Value::Function, previously in file /tmp/.tmpqeiszk/hugr-core/src/ops/constant.rs:169
  variant Value::Function, previously in file /tmp/.tmpqeiszk/hugr-core/src/ops/constant.rs:169

--- failure function_missing: pub fn removed or renamed ---

Description:
A publicly-visible function cannot be imported by its prior path. A `pub use` may have been removed, or the function itself may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/function_missing.ron

Failed in:
  function hugr_core::envelope::read_described_envelope, previously in file /tmp/.tmpqeiszk/hugr-core/src/envelope.rs:98

--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/inherent_method_missing.ron

Failed in:
  Value::function, previously in file /tmp/.tmpqeiszk/hugr-core/src/ops/constant.rs:380
  Value::function, previously in file /tmp/.tmpqeiszk/hugr-core/src/ops/constant.rs:380
```

### ⚠ `hugr-passes` breaking changes

```text
--- failure derive_trait_impl_removed: built-in derived trait no longer implemented ---

Description:
A public type has stopped deriving one or more traits. This can break downstream code that depends on those types implementing those traits.
        ref: https://doc.rust-lang.org/reference/attributes/derive.html#derive
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/derive_trait_impl_removed.ron

Failed in:
  type RedundantOrderEdgesPass no longer derives Copy, in /tmp/.tmpGqHhMb/hugr/hugr-passes/src/redundant_order_edges.rs:26

--- failure enum_missing: pub enum removed or renamed ---

Description:
A publicly-visible enum cannot be imported by its prior path. A `pub use` may have been removed, or the enum itself may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/enum_missing.ron

Failed in:
  enum hugr_passes::untuple::UntupleRecursive, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:23

--- failure function_missing: pub fn removed or renamed ---

Description:
A publicly-visible function cannot be imported by its prior path. A `pub use` may have been removed, or the function itself may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/function_missing.ron

Failed in:
  function hugr_passes::remove_dead_funcs, previously in file /tmp/.tmpqeiszk/hugr-passes/src/dead_funcs.rs:179
  function hugr_passes::const_fold::constant_fold_pass, previously in file /tmp/.tmpqeiszk/hugr-passes/src/const_fold.rs:224
  function hugr_passes::non_local::nonlocal_edges, previously in file /tmp/.tmpqeiszk/hugr-passes/src/non_local.rs:39
  function hugr_passes::nonlocal_edges, previously in file /tmp/.tmpqeiszk/hugr-passes/src/non_local.rs:39
  function hugr_passes::monomorphize, previously in file /tmp/.tmpqeiszk/hugr-passes/src/monomorphize.rs:36

--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/inherent_method_missing.ron

Failed in:
  UntuplePass::new, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:102
  UntuplePass::set_parent, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:114
  UntuplePass::recursive, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:136
  UntuplePass::find_rewrites, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:151
  UntuplePass::new, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:102
  UntuplePass::set_parent, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:114
  UntuplePass::recursive, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:136
  UntuplePass::find_rewrites, previously in file /tmp/.tmpqeiszk/hugr-passes/src/untuple.rs:151
  RedundantOrderEdgesPass::new, previously in file /tmp/.tmpqeiszk/hugr-passes/src/redundant_order_edges.rs:39
  RedundantOrderEdgesPass::recursive, previously in file /tmp/.tmpqeiszk/hugr-passes/src/redundant_order_edges.rs:44
  RemoveDeadFuncsPass::with_module_entry_points, previously in file /tmp/.tmpqeiszk/hugr-passes/src/dead_funcs.rs:75
  NormalizeCFGPass::cfgs, previously in file /tmp/.tmpqeiszk/hugr-passes/src/normalize_cfgs.rs:121
  ValueHandle::new_const_hugr, previously in file /tmp/.tmpqeiszk/hugr-passes/src/const_fold/value_handle.rs:95

--- failure trait_added_supertrait: non-sealed trait added new supertraits ---

Description:
A non-sealed trait added one or more supertraits, which breaks downstream implementations of the trait
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#generic-bounds-tighten
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_added_supertrait.ron

Failed in:
  trait hugr_passes::composable::ComposablePass gained WithScope in file /tmp/.tmpGqHhMb/hugr/hugr-passes/src/composable.rs:25
  trait hugr_passes::ComposablePass gained WithScope in file /tmp/.tmpGqHhMb/hugr/hugr-passes/src/composable.rs:25

--- failure trait_method_missing: pub trait method removed or renamed ---

Description:
A trait method is no longer callable, and may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#major-any-change-to-trait-item-signatures
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/trait_method_missing.ron

Failed in:
  method value_from_const_hugr of trait ConstLoader, previously in file /tmp/.tmpqeiszk/hugr-passes/src/dataflow.rs:73
  method with_scope_internal of trait ComposablePass, previously in file /tmp/.tmpqeiszk/hugr-passes/src/composable.rs:45
  method with_scope_internal of trait ComposablePass, previously in file /tmp/.tmpqeiszk/hugr-passes/src/composable.rs:45

--- failure type_allows_fewer_generic_type_params: type now allows fewer generic type parameters ---

Description:
A type now allows fewer generic type parameters than it used to. Uses of this type that supplied all previously-supported generic types will be broken.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#trait-new-parameter-no-default
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/type_allows_fewer_generic_type_params.ron

Failed in:
  Struct NormalizeCFGPass allows 1 -> 0 generic types in /tmp/.tmpGqHhMb/hugr/hugr-passes/src/normalize_cfgs.rs:101

--- failure unit_struct_changed_kind: unit struct changed kind ---

Description:
A public unit struct has been changed to a normal (curly-braces) struct, which cannot be constructed using the same struct literal syntax.
        ref: rust-lang/cargo#10871
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/unit_struct_changed_kind.ron

Failed in:
  struct MonomorphizePass in /tmp/.tmpGqHhMb/hugr/hugr-passes/src/monomorphize.rs:178
  struct InlineDFGsPass in /tmp/.tmpGqHhMb/hugr/hugr-passes/src/inline_dfgs.rs:17
  struct LocalizeEdges in /tmp/.tmpGqHhMb/hugr/hugr-passes/src/non_local.rs:23
```

<details><summary><i><b>Changelog</b></i></summary><p>

## `hugr-model`

<blockquote>

##
[0.26.0](hugr-model-v0.25.7...hugr-model-v0.26.0)
- 2026-03-16

### Testing

- Replace model text snapshots with roundtrip tests
([#2933](#2933))
- Add missing width arg in model-call example
([#2945](#2945))
</blockquote>

## `hugr-core`

<blockquote>

##
[0.26.0](hugr-core-v0.25.7...hugr-core-v0.26.0)
- 2026-03-16

### Bug Fixes

- Keep declared used_extensions in envelope description
([#2932](#2932))

### Documentation

- Move `spec/schema` and `spec/std_extensions` to `resources/`
([#2897](#2897))

### Miscellaneous Tasks

- [**breaking**] Fix new clippy warning on rust 1.94
([#2912](#2912))

### New Features

- [**breaking**] Rename ModelText envelope format to SExpression
([#2927](#2927))
- [**breaking**] Fix lower_funcs with custom extensions failing to load
([#2925](#2925))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))
- Deprecate HugrView::as_petgraph
([#2944](#2944))

### Refactor

- [**breaking**] Remove deprecated Value::Function
([#2928](#2928))
- [**breaking**] Remove deprecated definitions
([#2930](#2930))

### Testing

- Fix type_row intos in doctests
([#2941](#2941))
- Add missing width arg in model-call example
([#2945](#2945))
</blockquote>

## `hugr-llvm`

<blockquote>

##
[0.26.0](hugr-llvm-v0.25.7...hugr-llvm-v0.26.0)
- 2026-03-16

### New Features

- *(llvm)* [**breaking**] Upgrade to LLVM 21
([#2901](#2901))
- Include private HUGR functions in the local symbol table
([#2831](#2831))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))

### Refactor

- [**breaking**] Remove deprecated Value::Function
([#2928](#2928))
- [**breaking**] Remove deprecated stack_array codegen
([#2929](#2929))
</blockquote>

## `hugr-persistent`

<blockquote>

##
[0.5.0](hugr-persistent-v0.4.7...hugr-persistent-v0.5.0)
- 2026-03-16

### New Features

- *(llvm)* [**breaking**] Upgrade to LLVM 21
([#2901](#2901))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))
</blockquote>

## `hugr`

<blockquote>

##
[0.26.0](hugr-v0.25.7...hugr-v0.26.0)
- 2026-03-16

### Bug Fixes

- Keep declared used_extensions in envelope description
([#2932](#2932))

### Documentation

- Move `spec/schema` and `spec/std_extensions` to `resources/`
([#2897](#2897))

### Miscellaneous Tasks

- [**breaking**] Fix new clippy warning on rust 1.94
([#2912](#2912))

### New Features

- [**breaking**] Update remainder of passes to use PassScope, drop
default with_scope
([#2871](#2871))
- [**breaking**] Make `WithScope` a supertrait of `ComposablePass`
([#2921](#2921))
- [**breaking**] Rename ModelText envelope format to SExpression
([#2927](#2927))
- [**breaking**] Fix lower_funcs with custom extensions failing to load
([#2925](#2925))
- Deprecate HugrView::as_petgraph
([#2944](#2944))
- [**breaking**] `hugr-passes` is no longer reexported from
`hugr::algorithms`
([#2922](#2922))
- *(llvm)* [**breaking**] Upgrade to LLVM 21
([#2901](#2901))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))

### Refactor

- [**breaking**] Remove deprecated pass configuration
([#2938](#2938))
- [**breaking**] Remove deprecated Value::Function
([#2928](#2928))
- [**breaking**] Remove deprecated definitions
([#2930](#2930))

### Testing

- Fix type_row intos in doctests
([#2941](#2941))
- Add missing width arg in model-call example
([#2945](#2945))
</blockquote>

## `hugr-passes`

<blockquote>

##
[0.26.0](hugr-passes-v0.25.7...hugr-passes-v0.26.0)
- 2026-03-16

### New Features

- [**breaking**] `hugr-passes` is no longer reexported from
`hugr::algorithms`
([#2922](#2922))
- *(llvm)* [**breaking**] Upgrade to LLVM 21
([#2901](#2901))
- [**breaking**] Update remainder of passes to use PassScope, drop
default with_scope
([#2871](#2871))
- [**breaking**] Make `WithScope` a supertrait of `ComposablePass`
([#2921](#2921))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))
- Deprecate HugrView::as_petgraph
([#2944](#2944))

### Refactor

- [**breaking**] Remove deprecated Value::Function
([#2928](#2928))
- [**breaking**] Remove deprecated pass configuration
([#2938](#2938))
</blockquote>

## `hugr-cli`

<blockquote>

##
[0.26.0](hugr-cli-v0.25.7...hugr-cli-v0.26.0)
- 2026-03-16

### Documentation

- Move `spec/schema` and `spec/std_extensions` to `resources/`
([#2897](#2897))

### New Features

- [**breaking**] Rename ModelText envelope format to SExpression
([#2927](#2927))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))
</blockquote>


</p></details>

---
This PR was generated with
[release-plz](https://github.com/release-plz/release-plz/).

---------

Co-authored-by: Agustín Borgna <agustin.borgna@quantinuum.com>
Co-authored-by: Alec Edgington <54802828+cqc-alec@users.noreply.github.com>

## 🤖 New release

* `hugr-model`: 0.26.0 -> 0.26.1
* `hugr-core`: 0.26.0 -> 0.26.1 (✓ API compatible changes)
* `hugr-llvm`: 0.26.0 -> 0.26.1
* `hugr`: 0.26.0 -> 0.26.1 (✓ API compatible changes)
* `hugr-passes`: 0.26.0 -> 0.26.1 (✓ API compatible changes)
* `hugr-cli`: 0.26.0 -> 0.26.1
* `hugr-persistent`: 0.5.0 -> 0.5.1

<details><summary><i><b>Changelog</b></i></summary><p>

## `hugr-model`

<blockquote>

##
[0.26.0](hugr-model-v0.25.7...hugr-model-v0.26.0)
- 2026-03-16

### Testing

- Replace model text snapshots with roundtrip tests
([#2933](#2933))
- Add missing width arg in model-call example
([#2945](#2945))
</blockquote>

## `hugr-core`

<blockquote>

##
[0.26.1](hugr-core-v0.26.0...hugr-core-v0.26.1)
- 2026-03-18

### New Features

- *(hugr-py)* Allow linking packages and modules from Python
([#2947](#2947))

### Refactor

- start cleaning up SiblingSubgraph convexity checking
([#2956](#2956))
</blockquote>

## `hugr-llvm`

<blockquote>

##
[0.26.0](hugr-llvm-v0.25.7...hugr-llvm-v0.26.0)
- 2026-03-16

### New Features

- *(llvm)* [**breaking**] Upgrade to LLVM 21
([#2901](#2901))
- Include private HUGR functions in the local symbol table
([#2831](#2831))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))

### Refactor

- [**breaking**] Remove deprecated Value::Function
([#2928](#2928))
- [**breaking**] Remove deprecated stack_array codegen
([#2929](#2929))
</blockquote>

## `hugr`

<blockquote>

##
[0.26.1](hugr-v0.26.0...hugr-v0.26.1)
- 2026-03-18

### Bug Fixes

- ConstantFold fails when the module contains function declarations
([#2954](#2954))

### New Features

- *(hugr-py)* Allow linking packages and modules from Python
([#2947](#2947))

### Refactor

- start cleaning up SiblingSubgraph convexity checking
([#2956](#2956))
</blockquote>

## `hugr-passes`

<blockquote>

##
[0.26.1](hugr-passes-v0.26.0...hugr-passes-v0.26.1)
- 2026-03-18

### Bug Fixes

- ConstantFold fails when the module contains function declarations
([#2954](#2954))
</blockquote>

## `hugr-cli`

<blockquote>

##
[0.26.0](hugr-cli-v0.25.7...hugr-cli-v0.26.0)
- 2026-03-16

### Documentation

- Move `spec/schema` and `spec/std_extensions` to `resources/`
([#2897](#2897))

### New Features

- [**breaking**] Rename ModelText envelope format to SExpression
([#2927](#2927))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))
</blockquote>

## `hugr-persistent`

<blockquote>

##
[0.5.0](hugr-persistent-v0.4.7...hugr-persistent-v0.5.0)
- 2026-03-16

### New Features

- *(llvm)* [**breaking**] Upgrade to LLVM 21
([#2901](#2901))
- [**breaking**] TypeRow: add impl From array of Type, remove From<Type>
([#2784](#2784))
</blockquote>


</p></details>

---
This PR was generated with
[release-plz](https://github.com/release-plz/release-plz/).