Quantinuum/guppylang

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Pythonic quantum-classical programming language

Stars: 147
Forks: 42
Open beginner issues: 0
Indexed issues: 188
Avg merge: 1d 9h
Merged PRs (30d): 60

Dominant language: Python
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

188 open issues indexed

[Feature]: Add `empty_array` helper to create an array with all elements borrowed Open

C-feature-accepted

Quantinuum/guppylang#2340 · 1 assignee · Opened Sep 18, 2026
[Bug]: Output of `nat` converts to `int` Open

C-bugfix S-needs-triage

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

Quantinuum/guppylang#2339 · Opened Sep 16, 2026
[Bug]: Protocol checking is failing in finding `__bool__` function Open

A-checker C-bugfix

Difficulty 3/5 1-2 days Newbie friendliness 58/100

Quantinuum/guppylang#2321 · Opened Sep 11, 2026
[Bug]: Comptime function names in debug traces Open

C-bugfix

Difficulty 3/5 1-2 days Newbie friendliness 48/100

Quantinuum/guppylang#2319 · Opened Sep 11, 2026
[Bug]: Integer division with negative divisor Open

C-bugfix

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Quantinuum/guppylang#2316 · 2 comments · Opened Sep 10, 2026
[Performance]: Avoid recomputing same results in analyzing custom modifier calls Open

A-compiler C-perf

Difficulty 4/5 3-5 days Newbie friendliness 52/100

Quantinuum/guppylang#2291 · Opened Sep 7, 2026
[Feature]: More context in error with big span Open

A-checker C-feature-request

Difficulty 3/5 1-2 days Newbie friendliness 55/100

Quantinuum/guppylang#2290 · Opened Sep 7, 2026
[Maintenance]: Callgraph does not record indirect calls Open

C-maintenance

Difficulty 3/5 1-2 days Newbie friendliness 65/100

Quantinuum/guppylang#2282 · Opened Sep 4, 2026
[Feature]: Allow @guppy.unitary to be a static method Open

A-checker A-compiler C-feature-request

Quantinuum/guppylang#2278 · 1 assignee · Opened Sep 4, 2026
[Feature]: Use custom modifier as enum methods Open

B-backport-nominated C-feature-request

Difficulty 5/5 Over a week Newbie friendliness 25/100

Quantinuum/guppylang#2276 · Opened Sep 4, 2026
[Feature]: Allow direct custom method calls Open

A-checker A-compiler C-feature-request

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Quantinuum/guppylang#2275 · Opened Sep 4, 2026
[Bug]: Improve stack traces in Jupyter notebooks Open

A-emulator C-bugfix

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Quantinuum/guppylang#2270 · 2 comments · Opened Sep 2, 2026
[Feature]: Support returning protocols Open

C-feature-request

Quantinuum/guppylang#2267 · 1 assignee · Opened Sep 2, 2026
[Feature]: Use custom modifier as structure methods Open

A-checker A-compiler B-backport-nominated C-feature-accepted

Quantinuum/guppylang#2262 · 1 assignee · Opened Sep 1, 2026
[Feature]: Custom modifier with comptime Open

A-checker A-compiler C-feature-request D-medium

Difficulty 5/5 Over a week Newbie friendliness 35/100

Quantinuum/guppylang#2261 · Opened Sep 1, 2026
[Feature]: Support `numpy.ndarray` values alongside standard Python lists Open

C-feature-request

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Quantinuum/guppylang#2252 · 1 comment · Opened Aug 29, 2026
[Bug]: iqft produces wrong unitary when compiled without a preceding qft call Open

C-bugfix

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Quantinuum/guppylang#2250 · 1 comment · Opened Aug 29, 2026
[Bug]: Calling a generic function inside a `with control(...)` block fails to compile Open

A-compiler C-bugfix

Difficulty 3/5 1-2 days Newbie friendliness 76/100

Quantinuum/guppylang#2248 · Opened Aug 28, 2026
[Bug]: Calling an higher order function declared as `Daggerable` and `Controllable` raises `Error: Not owned` Open

C-bugfix

Difficulty 3/5 1-2 days Newbie friendliness 68/100

Quantinuum/guppylang#2244 · Opened Aug 27, 2026
[Feature]: Function-level optimization decorator Open

C-feature-accepted

Difficulty 4/5 3-5 days Newbie friendliness 55/100

Quantinuum/guppylang#2227 · 1 comment · Opened Aug 20, 2026
[Feature]: Use reachability to determine if comptime needs to be called Open

A-compiler C-bugfix D-hard

Difficulty 5/5 Over a week Newbie friendliness 35/100

Quantinuum/guppylang#2225 · Opened Aug 19, 2026
[Feature]: Support default method implementations in protocols Open

C-feature-request

Difficulty 5/5 Over a week Newbie friendliness 35/100

Quantinuum/guppylang#2205 · Opened Aug 14, 2026
[Docs]: Document how to correctly process `state_order` results Open

A-documentation

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

Quantinuum/guppylang#2194 · Opened Aug 13, 2026
[Maintenance]: Automated changelog and version sync PRs for branch releases Open

C-maintenance

Difficulty 5/5 Over a week Newbie friendliness 35/100

Quantinuum/guppylang#2186 · Opened Aug 10, 2026
[Feature][Refactor]: Add a new Protocol for the common method between `OptimizerInstance` and `GuppyFunctionDefinition` Open

A-language C-feature-accepted C-refactor

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Quantinuum/guppylang#2184 · Opened Aug 7, 2026
[Tracking issue][Performance]: Guppy compilation performance Open

C-perf C-tracking-issue

Difficulty 5/5 Over a week Newbie friendliness 35/100

Quantinuum/guppylang#2183 · Opened Aug 7, 2026
[Tracking issue][Performance]: Optimize compilation performance across the stack Open

C-perf C-tracking-issue

Difficulty 5/5 Over a week Newbie friendliness 20/100

Quantinuum/guppylang#2182 · Opened Aug 7, 2026
[Maintenance]: Transactions rather than suppress(Exception) Open

C-maintenance

Difficulty 5/5 Over a week Newbie friendliness 35/100

Quantinuum/guppylang#2179 · Opened Aug 5, 2026
[Maintenance]: Investigate if monomorphisation inside comptime functions can be simplified Open

C-maintenance

Difficulty 5/5 Over a week Newbie friendliness 35/100

Quantinuum/guppylang#2178 · Opened Aug 5, 2026
[Feature]: Use custom modifiers to define controlled and daggered version of qsystem gates Open

C-feature-request

Difficulty 5/5 Over a week Newbie friendliness 25/100

Quantinuum/guppylang#2172 · Opened Aug 5, 2026
Investigate shift behaviour with guppy int Open

C-question

Difficulty 3/5 1-2 days Newbie friendliness 65/100

Quantinuum/guppylang#2162 · 2 comments · Opened Aug 4, 2026
[Bug]: possible reordering of array index vs exit Open

C-bugfix

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Quantinuum/guppylang#2122 · 3 comments · Opened Jul 31, 2026
[Feature]: Unified interface for local and Nexus guppy executions Open

A-emulator C-feature-request D-easy

Difficulty 5/5 Over a week Newbie friendliness 38/100

Quantinuum/guppylang#2114 · 2 comments · 1 reaction · Opened Jul 29, 2026
[Feature]: Allow protocols to force implementations to be copyable or droppable Open

C-feature-request

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Quantinuum/guppylang#2097 · 1 comment · 1 reaction · Opened Jul 27, 2026
[Feature]: Range reverse Open

C-feature-request

Difficulty 3/5 1-2 days Newbie friendliness 48/100

Quantinuum/guppylang#2086 · 2 comments · Opened Jul 22, 2026
[Performance]: Compile time scales with number of reachable functions, dominated by native backend (LLVM + tket passes) Open

C-perf

Difficulty 5/5 Over a week Newbie friendliness 38/100

Quantinuum/guppylang#2084 · 1 comment · Opened Jul 22, 2026
[Feature]: collections standard library for BTreeMap Open

C-feature-request

Quantinuum/guppylang#2082 · 1 assignee · Opened Jul 21, 2026
[Feature]: Add a global phase operator to Guppy Open

C-feature-request

Quantinuum/guppylang#2080 · 2 comments · 1 assignee · Opened Jul 21, 2026
[Feature]: Reintroduce some classical computation under `dagger` Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Quantinuum/guppylang#2078 · 1 comment · Opened Jul 21, 2026
[Feature]: More automatic signature computation for custom functions Open

A-compiler A-stdlib C-feature-request C-refactor

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Quantinuum/guppylang#2073 · Opened Jul 20, 2026
[Feature]: Improve error message for non-comptime values used in comptime functions Open

C-feature-request

Difficulty 3/5 1-2 days Newbie friendliness 58/100

Quantinuum/guppylang#2051 · Opened Jul 15, 2026
[Feature]: Allow Guppy to express all controlled unitaries with modifiers Open

C-feature-request

Difficulty 5/5 Over a week Newbie friendliness 35/100

Quantinuum/guppylang#2029 · 1 comment · Opened Jul 9, 2026
[Feature]: Support multiple arrays in `state_output` Open

C-feature-request

Difficulty 4/5 3-5 days Newbie friendliness 55/100

Quantinuum/guppylang#2002 · 1 comment · Opened Jul 6, 2026
[Test]: Add some small test with the emulator Open

D-easy

Quantinuum/guppylang#1972 · 1 assignee · Opened Jun 30, 2026
[Tracking] Protocol improvements Open

C-tracking-issue

Difficulty 5/5 Over a week Newbie friendliness 20/100

Quantinuum/guppylang#1968 · Opened Jun 30, 2026
[Feature]: Array Slicing Open

A-language C-feature-request

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Quantinuum/guppylang#1956 · 1 comment · Opened Jun 29, 2026
[Feature]: Treat types implementing `__call__` as `Callable` Open

A-language C-feature-accepted

Difficulty 5/5 Over a week Newbie friendliness 30/100

Quantinuum/guppylang#1914 · Opened Jun 24, 2026
[Feature]: Rich cycle diagnostics for recursive structs, enums, and type aliases Open

A-compiler C-feature-accepted D-medium P-help-wanted

Difficulty 4/5 3-5 days Newbie friendliness 68/100

Quantinuum/guppylang#1908 · 1 reaction · Opened Jun 23, 2026
[Feature]: Add Iterator protocol to stdlib Open

C-feature-request

Quantinuum/guppylang#1893 · 1 assignee · Opened Jun 22, 2026
[Feature]: Find a better way to check array indexes Open

C-feature-request D-hard

Difficulty 5/5 Over a week Newbie friendliness 30/100

Quantinuum/guppylang#1858 · Opened Jun 15, 2026

Quantinuum/guppylang

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