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tree-sitter

13 indexed repositories · View on GitHub

tree-sitter
An incremental parsing system for programming tools

Rust · 26997 stars
py-tree-sitter
Python bindings to the Tree-sitter parsing library

C · 1502 stars
node-tree-sitter
Node.js bindings for tree-sitter

JavaScript · 876 stars
tree-sitter-cpp
C++ grammar for tree-sitter

JavaScript · 453 stars
swift-tree-sitter
Swift API for the tree-sitter incremental parsing system

Swift · 419 stars
tree-sitter-c-sharp
C# Grammar for tree-sitter

JavaScript · 320 stars
tree-sitter-php
PHP grammar for tree-sitter

JavaScript · 235 stars
tree-sitter-json
JSON grammar for tree-sitter

JavaScript · 203 stars
tree-sitter-scala
Scala grammar for tree-sitter

JavaScript · 197 stars
java-tree-sitter
Java bindings to the Tree-sitter parsing library

Java · 141 stars
tree-sitter-ocaml
OCaml grammar for tree-sitter

JavaScript · 102 stars
kotlin-tree-sitter
Kotlin bindings to the Tree-sitter parsing library

Kotlin · 99 stars
workflows
Reusable workflows for tree-sitter parsers

44 stars

Beginner friendly Everything

Open All

'wasm' build doesn't work with emscripten Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

tree-sitter/tree-sitter#5954 · 1 comment · 1 reaction · Opened Sep 18, 2026
reinterpretation of a JS value as wrapped C++ object leads to seg faults Open

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

tree-sitter/node-tree-sitter#290 · Opened Sep 18, 2026
generate: quadratic memory blowup in auxiliary-symbol tracking (42 GB on large grammar) — fix ready Open

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

tree-sitter/tree-sitter#5953 · Opened Sep 18, 2026
Group `use` with a leading backslash fails to parse: `use \Foo\{Bar};` Open

Difficulty 2/5 1-3 hours Newbie friendliness 92/100

tree-sitter/tree-sitter-php#303 · Opened Sep 17, 2026
`capture_list_pool_acquire` scans the whole pool for a free list Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

tree-sitter/tree-sitter#5951 · Opened Sep 16, 2026
`TreeCursor::goto_previous_sibling` fails at child index 256, 512, 768, ... Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

tree-sitter/tree-sitter#5950 · Opened Sep 16, 2026
`child_with_descendant` behavior incorrect when argument is not a descendant Open

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

tree-sitter/tree-sitter#5949 · Opened Sep 15, 2026
ParseReadCallback should return an empty string to denote EOF, not null Open

jvm

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

tree-sitter/kotlin-tree-sitter#88 · 2 comments · Opened Sep 15, 2026
child_by_field_* can return a grandchild through a visible alias of a hidden rule Open

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

tree-sitter/tree-sitter#5948 · 1 comment · Opened Sep 15, 2026
npm installer does not handle transient download errors Open

npm

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

tree-sitter/tree-sitter#5943 · Opened Sep 13, 2026
Compatibility issues with `bun run` and `bun build --compile` Open

templates

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

tree-sitter/tree-sitter#5939 · Opened Sep 12, 2026
Disabling a root wildcard pattern doesn't work Open

query

Difficulty 3/5 1-2 days Newbie friendliness 74/100

tree-sitter/tree-sitter#5932 · 3 comments · Opened Sep 9, 2026
add `rewind` callback to `TSLexer` Open

c-library

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

tree-sitter/tree-sitter#5929 · 1 comment · Opened Sep 7, 2026
lib: lexical conflicts can change keyword tokenization Open

parser

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

tree-sitter/tree-sitter#5925 · 11 comments · Opened Sep 7, 2026
Collaborator-Only Pull Requests Open

Difficulty 1/5 Under an hour Newbie friendliness 20/100

tree-sitter/tree-sitter#5922 · 1 reaction · Opened Sep 6, 2026
C++: a 16-character raw-string delimiter (the standard maximum) fails to parse — capacity guard is checked before the '(' terminator Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

tree-sitter/tree-sitter-cpp#371 · 1 comment · Opened Sep 4, 2026
Android: SIGABRT in Cleaner-0 for short-lived Query objects (tag-truncated free) and with Parser.includedRanges (cursor double free) Open

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

tree-sitter/kotlin-tree-sitter#86 · 1 comment · Opened Sep 3, 2026
Android: close() double-frees on API 33+ because a Cleaner is also registered Open

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

tree-sitter/kotlin-tree-sitter#85 · Opened Sep 3, 2026
Any chance of a 0.26.1 with the Point refcount fix? Open

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

tree-sitter/py-tree-sitter#500 · 4 reactions · Opened Sep 1, 2026
Error recovery regression in 0.27.0: A single malformed nested object collapses the whole document into an `ERROR` root Open

c-library error-recovery

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

tree-sitter/tree-sitter#5910 · 1 comment · 2 reactions · Opened Sep 1, 2026
Request: tree-sitter 0.25.x peer compatibility Open

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

tree-sitter/tree-sitter-php#301 · Opened Aug 26, 2026
parse(String) mis-measures its input: UTF-16 length on Native, modified UTF-8 on JVM Open

Difficulty 4/5 3-5 days Newbie friendliness 67/100

tree-sitter/kotlin-tree-sitter#82 · 5 comments · Opened Aug 23, 2026
Deployments to NPM are failing since 2025-06-08 Open

area/CI

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

tree-sitter/tree-sitter-scala#653 · 3 comments · Opened Aug 8, 2026
Unbounded recursion on nested parse may cause crashes Open

c-library parser

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

tree-sitter/tree-sitter#5807 · Opened Aug 2, 2026
Allocation-failure error paths: one NULL dereference and several resource leaks Open

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

tree-sitter/py-tree-sitter#492 · Opened Aug 2, 2026
Partial result leaks in query cursor error paths Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

tree-sitter/py-tree-sitter#491 · Opened Aug 2, 2026
Reference leak when building generic predicate arguments Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

tree-sitter/py-tree-sitter#490 · Opened Aug 2, 2026
Reading Point.column on inline-grammar nodes corrupts the heap (tree-sitter-markdown 0.5.1) Open

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

tree-sitter/py-tree-sitter#487 · 2 comments · Opened Jul 28, 2026
Possible progress callback leak in `Parser.parse()` Open

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

tree-sitter/node-tree-sitter#287 · 2 comments · 1 reaction · Opened Jul 18, 2026
`tree_sitter_cpp_external_scanner_deserialize` doesn't bound `length` against the size of the delimiter buffer Open

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

tree-sitter/tree-sitter-cpp#368 · Opened Jul 10, 2026
Generics are recognized as binary expressions Open

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

tree-sitter/tree-sitter-c-sharp#434 · Opened Jun 29, 2026
feature: publish new npm package for new tree-sitter-cpp Open

enhancement

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

tree-sitter/tree-sitter-cpp#365 · 1 reaction · Opened Jun 28, 2026
Lacking parser.h file? Open

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

tree-sitter/tree-sitter-c-sharp#432 · 1 comment · Opened Jun 22, 2026
Runtime-optional WASM support Open

c-library wasm

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

tree-sitter/tree-sitter#5699 · 9 comments · 4 reactions · Opened Jun 19, 2026
bug: installation fails with 3.15t interpreter on Windows Open

bug

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

tree-sitter/tree-sitter-cpp#363 · Opened Jun 16, 2026
bug: Emac's narrow-to-defun narrows to the next function when "#if defined" present Open

bug

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

tree-sitter/tree-sitter-cpp#359 · Opened Jun 7, 2026
C# file-based apps syntax highlighting Open

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

tree-sitter/tree-sitter-c-sharp#431 · 2 reactions · Opened Jun 1, 2026
feature: parameter highlighting? Open

enhancement

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

tree-sitter/tree-sitter-cpp#358 · Opened May 28, 2026
Support the free-threaded build Open

help wanted

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

tree-sitter/py-tree-sitter#458 · 7 comments · 3 reactions · Opened May 22, 2026
bug: out-of-class `= default;` reparses as expression_statement after regen with tree-sitter-cli >= 0.25.7 Open

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

tree-sitter/tree-sitter-cpp#357 · Opened May 20, 2026
The PyPI sdist is missing src/tree_sitter/parser.h Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

tree-sitter/tree-sitter-json#62 · Opened May 19, 2026
Add access to the source bytes of the Tree Open

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

tree-sitter/java-tree-sitter#180 · Opened May 15, 2026
bug: anonymous pointer-to-member declarator (`Class::*`) is not parsed in abstract-declarator contexts (`using`, `sizeof`, cast) Open

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

tree-sitter/tree-sitter-cpp#355 · Opened May 13, 2026
ABI 15 support? Open

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

tree-sitter/tree-sitter-json#61 · Opened May 13, 2026
Failed NPM release for v0.25.0 Open

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

tree-sitter/tree-sitter-ocaml#139 · 3 comments · Opened May 9, 2026
web-tree-sitter: Global scratch_query_cursor causes unbounded memory growth Open

bindings:web

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

tree-sitter/tree-sitter#5547 · Opened Apr 25, 2026
DEP0151 warning on Node 22 ESM consumers — package.json missing `exports` field Open

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

tree-sitter/tree-sitter-c-sharp#421 · Opened Apr 23, 2026
v0.23.1: later-uploaded cp310-abi3 wheel bumps grammar ABI (v14 → v15), silently breaking py-tree-sitter <0.25 (segfault on query()) Open

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

tree-sitter/tree-sitter-c-sharp#420 · Opened Apr 20, 2026
tree-sitter-bash in Python return captured nodes in unreliable order Open

tree-sitter/py-tree-sitter#450 · 1 comment · 1 assignee · Opened Apr 6, 2026
Switch to Trusted Publishing for package upload to PyPI in CI Open

tree-sitter/py-tree-sitter#445 · 2 comments · 1 reaction · 2 assignees · Opened Mar 25, 2026

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