unisonweb/unison

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A friendly programming language from the future

Stars: 6.7k
Forks: 308
Open beginner issues: 2
Indexed issues: 1.2k

Dominant language: Haskell
License: No license data
Last GitHub push: Aug 19, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue hacktoberfest
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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1,220 open issues indexed

How does Unison handle a scratch based on an older version? Open

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

unisonweb/unison#6268 · Opened Sep 19, 2026
Comments silently dropped on `update` Open

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

unisonweb/unison#6262 · 2 comments · Opened Aug 4, 2026
Profiler conflates FFI symbol names Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 64/100

unisonweb/unison#6261 · Opened Aug 1, 2026
ucm edit/load (no modification) fails when kinds have transitive dependencies. Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

unisonweb/unison#6259 · 2 comments · 1 reaction · Opened Jun 29, 2026
Graph.build crashes with array-write-out-of-bounds on duplicate input keys Open

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

unisonweb/unison#6250 · Opened Jun 18, 2026
pass offset arrays/pointers via FFI Open

feature request

Difficulty 5/5 Over a week Newbie friendliness 45/100

unisonweb/unison#6248 · 2 comments · Opened Jun 9, 2026
hashing `Pinned` or `Ptr` results in foreign value error. Open

bug

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

unisonweb/unison#6241 · 1 comment · Opened May 29, 2026
Private channel for reporting a security issue Open

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

unisonweb/unison#6240 · 4 comments · Opened May 29, 2026
InLocal called with bad handler reference Open

bug runtime

unisonweb/unison#6212 · 1 assignee · Opened Mar 28, 2026
Inferred type signature fails to unify ability type-params Open

bug

unisonweb/unison#6207 · 2 comments · 1 assignee · Opened Mar 27, 2026
Uh oh, an unexpected exception brought the process down! Open

bug

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

unisonweb/unison#6198 · Opened Mar 20, 2026
Attestation scripts in CI should not compare directly against STDOUT Open

bug

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

unisonweb/unison#6190 · Opened Mar 17, 2026
CI Attestation Source Hash doesn't match. Open

bug

unisonweb/unison#6189 · 1 assignee · Opened Mar 17, 2026
Possible UCM hashing/reproducibility issue? Open

bug

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

unisonweb/unison#6185 · 1 comment · Opened Mar 15, 2026
doc literals: commas/periods do strange things Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

unisonweb/unison#6184 · 1 comment · Opened Mar 12, 2026
`PatternMatchFailure` on nested `case` of `Requests` continuations Open

bug

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

unisonweb/unison#6183 · Opened Mar 8, 2026
Access to main thread on macOS for creating a WGPU and GLFW based GUI Open

feature request

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

unisonweb/unison#6182 · Opened Mar 6, 2026
Reflection-roundtrip bug happening when chaining is not used Open

bug

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

unisonweb/unison#6177 · Opened Feb 27, 2026
UCM Process Memory Growth + Defunct Children in Long-Lived Sessions Open

bug

unisonweb/unison#6175 · 1 assignee · Opened Feb 22, 2026
credentials.json created with world read permissions Open

bug P1 Security

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

unisonweb/unison#6173 · Opened Feb 21, 2026
Expose `getEnvironment :: IO [(String, String)]` Open

feature request

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

unisonweb/unison#6165 · 1 comment · Opened Feb 7, 2026
ci cabal smoke test should include some info from the failure Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

unisonweb/unison#6162 · Opened Feb 5, 2026
Type inference regression in UCM 1.1.0 Open

bug typechecker

unisonweb/unison#6161 · 1 comment · 1 assignee · Opened Feb 4, 2026
`display` arg disambiguation could use numbered args treatment Open

feature request

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

unisonweb/unison#6159 · Opened Feb 3, 2026
diff.branch terminology Open

error-message

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

unisonweb/unison#6156 · Opened Feb 2, 2026
`run` disambiguation doesn't include names from the scratch file Open

bug

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

unisonweb/unison#6154 · Opened Jan 31, 2026
round trip multiline strings in expressions Open

bug

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

unisonweb/unison#6152 · Opened Jan 30, 2026
Misleading type error with under-applied functions Open

error-message

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

unisonweb/unison#6144 · Opened Jan 26, 2026
find by type sensitive to type variable names? Open

bug

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

unisonweb/unison#6140 · 1 comment · Opened Jan 25, 2026
confusing typechecking error when unguarded bindings are out of order, worse with abilities Open

abilities error-message

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

unisonweb/unison#6139 · 1 comment · Opened Jan 25, 2026
unexpected no results for find in transitive dependency Open

bug

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

unisonweb/unison#6138 · Opened Jan 23, 2026
`find` finds no results when `view` does find something Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

unisonweb/unison#6136 · Opened Jan 23, 2026
apparent but not actual(?) churn when using `docEmbedTermLink` syntax Open

bug

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

unisonweb/unison#6127 · Opened Jan 19, 2026
misleading error when type-checking patterns Open

bug error-message typechecker

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

unisonweb/unison#6126 · Opened Jan 18, 2026
no unused binding warnings in watch or test expressions Open

bug lsp

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

unisonweb/unison#6124 · Opened Jan 15, 2026
unexpected name resolution issue in transitive dep during merge Open

bug

unisonweb/unison#6122 · 4 comments · 1 assignee · Opened Jan 15, 2026
Types with suspended computations inside don't round trip sometimes Open

bug

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

unisonweb/unison#6121 · Opened Jan 15, 2026
track constructor dependencies in the dependencies index Open

feature request

Difficulty 4/5 3-5 days Newbie friendliness 42/100

unisonweb/unison#6120 · Opened Jan 15, 2026
broken/overly-eager line wrapping at ucm prompt? Open

bug

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

unisonweb/unison#6119 · 3 comments · 1 reaction · Opened Jan 15, 2026
`dependents` should say name not found if not found Open

error-message

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

unisonweb/unison#6113 · 3 comments · Opened Jan 14, 2026
design mcp benchmark suite Open

feature request

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

unisonweb/unison#6110 · Opened Jan 13, 2026
ability to preview doc rendering for docs in scratch file Open

feature request

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

unisonweb/unison#6109 · 1 comment · Opened Jan 12, 2026
It would be great to have live UCM output so that Unison + UCM interactions can be scripted and better documented without drift. Open

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

unisonweb/unison#6108 · Opened Jan 12, 2026
Need a way to embed type expressions in Docs and have them kind checked + hyperlinked Open

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

unisonweb/unison#6107 · Opened Jan 12, 2026
Provide optimized replacements for Bytes decoding functions Open

feature request

unisonweb/unison#6100 · 1 assignee · Opened Jan 8, 2026
quicker CI? Open

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

unisonweb/unison#6098 · Opened Jan 7, 2026
merge treats non-conflicted lines as conflicts Open

bug

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

unisonweb/unison#6096 · Opened Jan 7, 2026
failed to fetch base library Open

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

unisonweb/unison#6086 · 1 comment · Opened Jan 5, 2026
push: remember most recent remote for branch Open

feature request

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

unisonweb/unison#6071 · 1 comment · 1 reaction · Opened Dec 19, 2025
`view` gives bad error when numbered arg is a namespace. Open

error-message

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

unisonweb/unison#6070 · Opened Dec 19, 2025

unisonweb/unison

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