potassco/constraint-handler

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📐 Handle acyclic constraints over variables with large/infinite domains

Stars: 3
Forks: 0
Open beginner issues: 0
Indexed issues: 73
Avg merge: 1d 19h
Merged PRs (30d): 20

Dominant language: Python
License: MIT
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

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73 open issues indexed

Fallbackk faster than constraint handler native version Open

potassco/constraint-handler#414 · 4 comments · 1 assignee · Opened Sep 11, 2026
Inconsistent integer division Open

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

potassco/constraint-handler#412 · Opened Sep 10, 2026
RecursionError when converting deeply nested operations Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

potassco/constraint-handler#409 · Opened Sep 8, 2026
statement_python leads to unnecessary warnings Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

potassco/constraint-handler#401 · Opened Sep 3, 2026
Propagator is not thread safe Open

potassco/constraint-handler#397 · 1 assignee · Opened Sep 2, 2026
Make evaluations retractable Open

potassco/constraint-handler#395 · 1 assignee · Opened Sep 2, 2026
Use counter or 1/2-watched literal schemes to detect expressions with 1/0 unassigned variable(s) Open

potassco/constraint-handler#394 · 2 assignees · Opened Sep 2, 2026
Provide an API to execute precomputation and solving separately Open

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

potassco/constraint-handler#392 · Opened Aug 31, 2026
Improve propagator algorithms to increase performance Open

potassco/constraint-handler#391 · 1 assignee · Opened Aug 31, 2026
Improve performance of propagator via preprocessing Open

potassco/constraint-handler#390 · 1 assignee · Opened Aug 31, 2026
Difference in treatment of None for conj/disj in compile and propagator engines Open

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

potassco/constraint-handler#389 · Opened Aug 31, 2026
FCH transforms optimization criteria Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

potassco/constraint-handler#369 · Opened Jul 30, 2026
compile2 behaves non-deterministically in the ordering of the facts/rules produces Open

potassco/constraint-handler#331 · 1 assignee · Opened Jul 8, 2026
An independent propagator to control the solving without enabling domain heuristics Open

potassco/constraint-handler#313 · 1 assignee · Opened Jun 23, 2026
post_processor.py should not depend on _optimize_maximizeSum/4 Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

potassco/constraint-handler#298 · Opened Jun 12, 2026
Manually assigning a value to execution_output should give at least a warning Open

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

potassco/constraint-handler#276 · Opened Jun 1, 2026
ground engine executions Open

potassco/constraint-handler#271 · 1 assignee · Opened May 19, 2026
mkdocs serve warning Open

potassco/constraint-handler#260 · 1 comment · 1 assignee · Opened Apr 23, 2026
Very brittle propagator-check performance Open

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

potassco/constraint-handler#258 · Opened Apr 23, 2026
Twice the amount of variables needed Open

potassco/constraint-handler#257 · 3 comments · 1 assignee · Opened Apr 22, 2026
The recoverable operator mechanism is buggy Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

potassco/constraint-handler#253 · 3 comments · Opened Apr 21, 2026
Unnecessary executions Open

potassco/constraint-handler#247 · 1 assignee · Opened Apr 15, 2026
Add detection of cyclic dependencies Open

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

potassco/constraint-handler#244 · Opened Apr 15, 2026
Propagator support for preferences Open

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

potassco/constraint-handler#226 · Opened Apr 8, 2026
Documentation - make clearer difference between conditional execution `if` and logical implication `limp` Open

Difficulty 1/5 Under an hour Newbie friendliness 72/100

potassco/constraint-handler#216 · 6 comments · Opened Apr 2, 2026
Passing the output of a propagator `execution_declare/5` constraint to a non-propagator constraint Open

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

potassco/constraint-handler#208 · 2 comments · Opened Mar 30, 2026
Rename length Open

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

potassco/constraint-handler#205 · Opened Mar 27, 2026
More recoverable operators. Open

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

potassco/constraint-handler#203 · Opened Mar 27, 2026
Encoding is not tight Open

potassco/constraint-handler#199 · 7 comments · 1 assignee · Opened Mar 25, 2026
Order-dependent test failures: custom_globals.lp mutates global Python evaluation environment (_shared_environment) and leaks across tests Open

potassco/constraint-handler#188 · 2 assignees · Opened Mar 16, 2026
Vague naming of execution tag/group identifier in the documentation Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

potassco/constraint-handler#186 · 1 comment · Opened Mar 16, 2026
Introduce join and meet operators Open

potassco/constraint-handler#184 · 1 assignee · Opened Mar 10, 2026
type_checking unit test might be missing some none-related tests Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

potassco/constraint-handler#182 · Opened Mar 10, 2026
Allow max and min to take 1 argument and more than 2 arguments Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

potassco/constraint-handler#180 · Opened Mar 10, 2026
some operator declares for max and min are missing Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

potassco/constraint-handler#179 · Opened Mar 10, 2026
Naming Consistency of Set Values/References. Open

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

potassco/constraint-handler#173 · Opened Mar 4, 2026
Similarly named operators are indistinguishable. Open

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

potassco/constraint-handler#170 · Opened Feb 26, 2026
Architecture Hierarchy and Potential Circular Imports. Open

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

potassco/constraint-handler#169 · Opened Feb 26, 2026
Variadic add and mult not implemented for float. Open

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

potassco/constraint-handler#166 · Opened Feb 26, 2026
Convoluted warnings Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

potassco/constraint-handler#152 · Opened Feb 16, 2026
Create unit tests for the error recovery mode Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

potassco/constraint-handler#147 · Opened Feb 15, 2026
Create unit tests for engine interactions Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

potassco/constraint-handler#146 · Opened Feb 15, 2026
More precise types for `default` Open

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

potassco/constraint-handler#139 · Opened Feb 8, 2026
Define and implement support for sequence (list, etc.) Open

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

potassco/constraint-handler#124 · Opened Jan 30, 2026
Define and implement support for map (dictionary, associative array, etc.) Open

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

potassco/constraint-handler#123 · Opened Jan 30, 2026
Support for other data structures Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

potassco/constraint-handler#122 · Opened Jan 30, 2026
Minus operator not working as intended? Engine interaction? Open

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

potassco/constraint-handler#105 · 1 comment · Opened Jan 27, 2026
Fold implementation as intended? Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

potassco/constraint-handler#101 · 3 comments · Opened Jan 25, 2026
Variable(undeclared) warning in evaluate Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

potassco/constraint-handler#100 · Opened Jan 22, 2026
Variable(undeclared) warning in preferences Open

Difficulty 3/5 1-2 days Newbie friendliness 20/100

potassco/constraint-handler#99 · Opened Jan 22, 2026

potassco/constraint-handler

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