[proof-new] Fix explanation of literals in SAT proof manager (#6346)
[cvc5.git] / CONTRIBUTING.md
1 # Contributing
2
3 External contributions to CVC4 may be proposed using git's standard pull request
4 mechanism. The following terms apply to all such contributions:
5
6 - We require all pull requests to be squashed into a single commit before
7 being submitted and to be signed using `git commit -s`.
8
9 - CVC4 is distributed under the terms of the modified BSD license (see
10 [COPYING](https://github.com/CVC4/CVC4/blob/master/COPYING) file). By
11 submitting a signed contribution, you automatically agree to accept the conditions
12 described in [COPYING](https://github.com/CVC4/CVC4/blob/master/COPYING).
13
14 - By submitting a signed contribution, you additionally automatically agree
15 that the [Developer Certificate of Origin](https://developercertificate.org)
16 shown below applies to your contribution.
17
18 ```
19 Developer Certificate of Origin
20 Version 1.1
21
22 Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
23 1 Letterman Drive
24 Suite D4700
25 San Francisco, CA, 94129
26
27 Everyone is permitted to copy and distribute verbatim copies of this
28 license document, but changing it is not allowed.
29
30
31 Developer's Certificate of Origin 1.1
32
33 By making a contribution to this project, I certify that:
34
35 (a) The contribution was created in whole or in part by me and I
36 have the right to submit it under the open source license
37 indicated in the file; or
38
39 (b) The contribution is based upon previous work that, to the best
40 of my knowledge, is covered under an appropriate open source
41 license and I have the right under that license to submit that
42 work with modifications, whether created in whole or in part
43 by me, under the same open source license (unless I am
44 permitted to submit under a different license), as indicated
45 in the file; or
46
47 (c) The contribution was provided directly to me by some other
48 person who certified (a), (b) or (c) and I have not modified
49 it.
50
51 (d) I understand and agree that this project and the contribution
52 are public and that a record of the contribution (including all
53 personal information I submit with it, including my sign-off) is
54 maintained indefinitely and may be redistributed consistent with
55 this project or the open source license(s) involved.
56 ```
57
58 If you are interested in becoming a long-term contributor to the CVC4 project,
59 please contact one of the
60 [project leaders](https://cvc4.github.io/people.html#project-leaders).
61 We'd be happy to point you to some internal documentation to help you out.