typetools/checker-framework
Pluggable type-checking for Java
In plain words
Outside PRs: 8 in 10 merged. First reply usually within 42 h. 1 starter issue is available now.
Outside PRs merged
82%
9 merged, 2 closed, 3 still open
Higher than 46% of 565 other measured repositories
First human reply
42 h
median of 14 outside PRs, 1 unanswered
Time to merge
2.5 days
9 of 14 outside PRs merged
First-time contributors
Not enough data
merged: 0 of 1 decided first PRs
Outside PRs opened 30 to 120 days ago, so each has had time to be answered. A figure needs at least 5 pull requests, otherwise it reads "Not enough data". How this is calculated · A number looks wrong?
Your first steps here
If you have never contributed to this project, do these in order.
- 1
Read the contributing guide
It says how to set the project up and what the maintainers expect in a pull request.
Open the guide - 2
Take this free issue
Feature Request: Support the use of jetbrains "external annotations" annotation.xml format for stubbing.
Open issue #6258 - 3
Know where to ask
No chat was found. Ask on the issue you are working on; that is where maintainers look.
- 4
Open a small pull request
Link the issue in it. A first reply here usually takes 42 h; until then, silence is normal.
What happens to an outside pull request
Every pull request opened by someone outside the core team, 30 to 120 days ago.
- Opened by outsiders14100%
- Got a human reply1393%
- Merged964%
Time to first reply
After 2 days, 50% of outside PRs had a reply from a person. After a week, 79%. Bots do not count.
The last 52 weeks
Outside pull requests opened each week, and how many of them have been merged.
Starter issues
Issues labelled for beginners, with their real state. Available means open, unassigned, no linked pull request, nobody has claimed it in the last 14 days, and it was updated in the last 60 days.
- Available
- 1
- Claimed
- 0
- Has a pull request
- 9
- Stale
- 8
- Has a pull requestSee which other JDK subtypes of `AutoCloseable` should be `@MustCall("close")`#6354
- AvailableFeature Request: Support the use of jetbrains "external annotations" annotation.xml format for stubbing.#6258
- Has a pull requestGenerate report file from analysis.
When replies arrive
All maintainers counted together. Shown only when at least 3 people replied in the last 90 days, so it never describes one person.
Replies are most likely between 20:00 and 23:00 (India time).
Show as table
| Hour (India time) | Replies, all weekdays |
|---|---|
| 00:00 | 25 |
| 01:00 | 27 |
| 02:00 | 18 |
| 03:00 | 12 |
| 04:00 | 7 |
| 05:00 | 7 |
| 06:00 | 4 |
| 07:00 | 3 |
| 08:00 | 8 |
| 09:00 | 8 |
| 10:00 | 3 |
| 11:00 | 1 |
| 12:00 | 1 |
| 13:00 | 1 |
| 14:00 | 0 |
| 15:00 | 1 |
| 16:00 | 1 |
| 17:00 | 1 |
| 18:00 | 5 |
| 19:00 | 15 |
| 20:00 | 35 |
| 21:00 | 46 |
| 22:00 | 35 |
| 23:00 | 22 |
How to start
- Contributing guidefound
- Code of conductnot found
- Issue templatesfound
- Dev container for one-step setupnot found
- No CLA or sign-off requirement was found.
Where the project talks
No chat or mailing list link was found in the README or contributing guide.
Activity
- Commits, 90 days
- 474
- Releases, 12 months
- 15
- Active maintainers
- 4
- Last push
- 10 Oct 2026
Stack
Badge and feed
Two ways to use these figures outside this page.
For maintainers: a README badge
Shows newcomers how quickly this project answers and how often it merges. Paste the line into your README; the badge updates with the index.
[](https://contributable.vercel.app/repo/typetools/checker-framework)[](https://contributable.vercel.app/repo/typetools/checker-framework)For contributors: follow new issues
Add the feed to a feed reader (Feedly, Inoreader, Thunderbird) and you hear about new free starter issues here without checking the site.
https://contributable.vercel.app/feed/repo/typetools/checker-frameworkFor developers: every figure on this page as JSON at .
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