commonmark/cmark

View on GitHub

CommonMark parsing and rendering library and program in C

Stars: 2k
Forks: 691
Open beginner issues: 0
Indexed issues: 52
Avg merge: 1d 16h
Merged PRs (30d): 1

Dominant language: C
License: No license data
Last GitHub push: Sep 1, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

52 open issues indexed

Inline code language Open

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

commonmark/cmark#626 · 4 comments · Opened Jul 13, 2026
Regarding commit 54b2be5 (warnings from clang) Open

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

commonmark/cmark#624 · Opened Jun 12, 2026
Single-space blank line evicts a list-item continuation Open

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

commonmark/cmark#618 · Opened Jun 1, 2026
Check errno after calling strtol Open

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

commonmark/cmark#614 · Opened May 27, 2026
Building both static and shared library? Open

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

commonmark/cmark#598 · 2 comments · Opened Jan 7, 2026
Incorrect `parser->offset` advancement for closing fenced code blocks in `parse_code_block_prefix` Open

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

commonmark/cmark#590 · 3 comments · Opened Oct 31, 2025
The cmark_markdown_to_html function call uses free to release crashes Open

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

commonmark/cmark#577 · 2 comments · Opened Apr 29, 2025
Link Reference Definition Followed by Hyphen Underline Open

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

commonmark/cmark#575 · 1 comment · Opened Apr 5, 2025
Issue with rendering whitespace to commonmark Open

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

commonmark/cmark#566 · 1 comment · Opened Nov 13, 2024
Introduce a mechanism to duplicate/clone a node and all it's children? Open

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

commonmark/cmark#560 · 4 comments · Opened Aug 19, 2024
Consider allowing Nodes with a "fragment" type. Open

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

commonmark/cmark#558 · 10 comments · Opened Aug 19, 2024
`parse_list_marker` Does Not Correctly Check for CRLF. Open

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

commonmark/cmark#550 · Opened Jun 24, 2024
Quadratic behavior when parsing smart quotes Open

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

commonmark/cmark#521 · 4 comments · Opened Jan 15, 2024
Keep copyright information in source files Open

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

commonmark/cmark#505 · Opened Jan 3, 2024
why does this HTML block start and end on the same line? Open

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

commonmark/cmark#488 · 3 comments · Opened Nov 19, 2023
Please provide working .a/.lib files Open

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

commonmark/cmark#487 · 1 comment · Opened Nov 12, 2023
`make mingw` should forward/use CC, CXX, HOST variables if set Open

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

commonmark/cmark#484 · 2 comments · Opened Sep 25, 2023
HTML comments do not follow the 0.30 spec Open

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

commonmark/cmark#476 · Opened Apr 18, 2023
libcmark uses full version number as major dylib version number Open

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

commonmark/cmark#474 · 3 comments · Opened Apr 3, 2023
Tracking backslash escapes? Open

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

commonmark/cmark#450 · Opened Sep 20, 2022
incorrect start_column & end_column Open

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

commonmark/cmark#442 · 2 comments · 1 reaction · Opened Mar 23, 2022
API documentation is missing an explanation of CMARK_NODE_CUSTOM_BLOCK and CMARK_NODE_CUSTOM_INLINE Open

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

commonmark/cmark#441 · 2 comments · Opened Mar 16, 2022
[Feature] Support math environment via $ and $$ like LaTeX Open

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

commonmark/cmark#439 · 3 comments · 2 reactions · Opened Feb 3, 2022
[Clang-tidy] Narrowing data types is implementation defined Open

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

commonmark/cmark#437 · Opened Jan 30, 2022
Add additional C flags to your build (improving your code) Open

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

commonmark/cmark#435 · 5 comments · Opened Jan 22, 2022
Quadratic output growth with CommonMark renderer Open

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

commonmark/cmark#377 · 13 comments · Opened Feb 10, 2021
Illegal control characters in XML output Open

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

commonmark/cmark#365 · 12 comments · Opened Oct 19, 2020
Automatically generate ids for headers Open

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

commonmark/cmark#364 · 3 comments · 1 reaction · Opened Oct 3, 2020
Feature: Rendering hooks Open

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

commonmark/cmark#349 · 3 comments · Opened Jul 16, 2020
Extra leading spaces when wrapping list to fixed width Open

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

commonmark/cmark#348 · 2 comments · Opened Jul 10, 2020
Dash-separated long list items rendered as sublist Open

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

commonmark/cmark#347 · Opened Jul 2, 2020
2 test failures with python-3.8? Open

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

commonmark/cmark#331 · 8 comments · Opened Feb 1, 2020
Line breaking in a code span can break the block structure Open

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

commonmark/cmark#323 · 1 comment · Opened Jan 4, 2020
Repeated CommonMark parsing and rendering can converge quite slowly Open

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

commonmark/cmark#318 · 1 comment · Opened Dec 21, 2019
CommonMark rendering does not handle one case of nested emphasis Open

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

commonmark/cmark#315 · Opened Dec 18, 2019
Rendering to CommonMark with a column width can create a heading Open

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

commonmark/cmark#314 · 7 comments · Opened Dec 17, 2019
[cmark --smart] paren-quote-markup combination Open

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

commonmark/cmark#311 · 2 comments · Opened Nov 5, 2019
Improper escaping in commonmark renderer with auto-wrapping Open

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

commonmark/cmark#306 · 1 comment · Opened Jul 17, 2019
Source position seems off Open

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

commonmark/cmark#296 · 9 comments · 3 reactions · Opened Apr 24, 2019
A***B*C* doesn't roundtrip Open

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

commonmark/cmark#292 · 1 comment · Opened Apr 2, 2019
Identify the position in the source file as offset Open

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

commonmark/cmark#253 · 4 comments · 1 reaction · Opened Feb 13, 2018
src/CMakeLists.txt SOVERSION Open

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

commonmark/cmark#252 · 4 comments · Opened Jan 17, 2018
Please add Table of Contents function Open

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

commonmark/cmark#235 · 1 comment · 13 reactions · Opened Sep 28, 2017
Surfacing the list bullet marker type Open

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

commonmark/cmark#225 · 3 comments · Opened Aug 5, 2017
Bug in lazy blockquote continuation (or corresponding spec is wrong, whichever) Open

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

commonmark/cmark#204 · 7 comments · Opened Jun 15, 2017
Auto-escape HTML input Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

commonmark/cmark#176 · 18 comments · 2 reactions · Opened Jan 3, 2017
IRC channel Open

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

commonmark/cmark#173 · 3 comments · 1 reaction · Opened Dec 23, 2016
Consider writing scanners by hand Open

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

commonmark/cmark#167 · 9 comments · Opened Dec 2, 2016
Add a function to render inline nodes Open

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

commonmark/cmark#147 · 4 comments · Opened Jul 24, 2016
The commonmark renderer's escaping strategy is very aggresive Open

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

commonmark/cmark#131 · 31 comments · Opened Jun 1, 2016

commonmark/cmark

Get new issues in your inbox