trailofbits/necessist

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A mutation-based tool for finding bugs in tests

Stars: 145
Forks: 21
Open beginner issues: 0
Indexed issues: 19
Avg merge: 10h 58m
Merged PRs (30d): 41

Dominant language: Rust
License: AGPL-3.0
Last GitHub push: Sep 16, 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

19 open issues indexed

`SOURCE_FILES` is never invalidated, so spans can be resolved against stale contents Open

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

trailofbits/necessist#1963 · Opened Sep 11, 2026
Find a project that uses Hardhat 3.15.0 or later Open

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

trailofbits/necessist#1960 · Opened Sep 9, 2026
Necessist needs a way to filter results after running Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

trailofbits/necessist#1834 · 4 comments · Opened Apr 8, 2026
Necessist assumes the Foundry test directory is named `test` Open

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

trailofbits/necessist#1727 · 1 comment · Opened Nov 4, 2025
reduce false positives from wrapper assert calls Open

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

trailofbits/necessist#1713 · 1 comment · Opened Oct 23, 2025
Test files with more than 2 extensions do not enumerate Open

bug

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

trailofbits/necessist#1484 · 2 comments · Opened Mar 21, 2025
Rank removal candidates Open

enhancement

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

trailofbits/necessist#1120 · 2 comments · Opened May 30, 2024
Use coverage? Open

enhancement

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

trailofbits/necessist#1023 · Opened Mar 8, 2024
Incremental Testing based on `git-diff` Open

enhancement

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

trailofbits/necessist#958 · 2 comments · Opened Jan 16, 2024
Create trophies page Open

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

trailofbits/necessist#908 · Opened Dec 7, 2023
Necessist should ignore "ignored" functions Open

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

trailofbits/necessist#838 · Opened Oct 26, 2023
Generate table output for passing mutant percentage Open

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

trailofbits/necessist#662 · Opened Aug 10, 2023
Reduce removal of nonbuildable statements Open

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

trailofbits/necessist#661 · 2 comments · Opened Aug 10, 2023
Contribution guidelines Open

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

trailofbits/necessist#531 · Opened Jun 27, 2023
removal of closures and functions that contain `assert` macros cause false positives Open

enhancement

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

trailofbits/necessist#502 · 4 comments · Opened Jun 15, 2023
Investigate an interface to other languages Open

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

trailofbits/necessist#391 · 1 comment · Opened Apr 25, 2023
Allow mutation of original source code, instead of tests Open

future enhancement

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

trailofbits/necessist#279 · 1 comment · Opened Mar 17, 2023
Output a slither like markdown checklist for easier analysis Open

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

trailofbits/necessist#263 · 4 comments · Opened Mar 7, 2023
Dry run all the test files together before initiating mutations Open

enhancement

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

trailofbits/necessist#262 · 3 comments · Opened Mar 7, 2023

trailofbits/necessist

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