chore: release

[hugrbot]

🤖 New release

• tket: 0.18.0 -> 0.19.0 (✓ API compatible changes)
• tket-qsystem: 0.24.0 -> 0.25.0 (✓ API compatible changes)

Changelog

tket

0.19.0 - 2026-05-28

Bug Fixes

• Apply modifiers through function calls (#1531)
• Incorrect matching of pytket parameters to unsupported graph ports (#1561)
• [breaking] Passes with Nested Modifier (#1546)
• bug in hugr building when control modifiers are nested (#1550)
• Multiple fixes to the pytket encoder (#1566)
• [breaking] Replace non-deterministic iterations on hash maps (#1582)
• Set inputs of functions loaded as values to top during dataflow analysis (#1595)
• Using indexes inside dagger modifier (#1588)
• address Miri unsoundness by installing nextest and skipping FFI/long running tests (#1565)
• skip test_nested_array to resolve miri unsoundness (#1623)

New Features

• (const-fold) combine Consts for each out-port; write prepopulated inputs (#1489)
• InlineFunctionsPass (#1524)
• upgrade to hugr v0.27.1 (#1568)
• [breaking] Ignore empty circuits when encoding Hugr regions into pytket (#1562)
• Add python definitions for the TKET metadata keys (#1535)
• Clean Up by Deleting Unconnected Nodes after Modifier Solve (#1557)
• InlineHint metadata (#1532)
• Allowing control flow in control (#1603)

Performance

• Improve modifier resolver pass by visiting nodes in a set (#1621)
• Avoid string formatting in Hugr op hashing (#1624)

Refactor

• Replace portgraph toposort in CommandIterator with node vector (#1608)
• [breaking] Deprecate commands iterator (#1611)

Testing

• Pin guppy version in example files, fix test (#1534)
• Skip slow modifier test (#1587)
• Add modifier test for subscripted control qubits (#1601)

tket-qsystem

0.25.0 - 2026-05-28

Bug Fixes

• Multiple fixes to the pytket encoder (#1566)
• [breaking] Replace non-deterministic iterations on hash maps (#1582)

New Features

• expose the QSystemPass to Python (#1556)
• upgrade to hugr v0.27.1 (#1568)
• [breaking] Ignore empty circuits when encoding Hugr regions into pytket (#1562)
• (qsystem) [breaking] multiple platform extensions (#1567)

Refactor

• [breaking] Deprecate commands iterator (#1611)

Testing

• Pin guppy version in example files, fix test (#1534)

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This PR was generated with release-plz.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.62%. Comparing base (b60553f) to head (63fdc75).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1503   +/-   ##
=======================================
  Coverage   85.62%   85.62%           
=======================================
  Files         190      190           
  Lines       30534    30534           
  Branches    29189    29189           
=======================================
  Hits        26145    26145           
  Misses       3266     3266           
  Partials     1123     1123           

Flag	Coverage Δ
python	90.14% <ø> (ø)
qis-compiler	92.20% <ø> (ø)
rust	85.41% <ø> (ø)

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