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🦋 Problem Solving
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🦋 Problem Solving

perl6/problem-solving repository is used for working on all issues that require discussion and/or consensus. This document describes the process in more detail.

Reporting a problem

Anyone is welcome to create a new issue. The ticket should only contain the description of the actual problem (X of the XY). It is advised that you start your ticket with a short description of the problem and include more details afterwards.

This repository has broad scope, but not all problems belong here. For example, bugs in the Rakudo compiler should be reported in rakudo repository.

Initial proposal

Anyone is welcome to submit an initial proposal as a comment. Start your comment with “Initial proposal:” and follow with a short and clear description of the approach that can be used to resolve the problem. Include just enough details to paint the general picture and refrain from writing too much (which will be required for the next step, but not now).

Good solutions resolve more than one problem, so link all other related problems that will be affected by your solution.

If you know that you won't be able to work on a full solution, please indicate so in your comment. Having a hero is often more important than having a good idea, but it is also important to hear out good heroless ideas.

Assignees and their role

Issues and PRs are labeled and assigned to corresponding devs (see the list). The task of the assignee is to drive the process, provide vision and assist everyone involved. Assignees can provide feedback, ask for clarifications, suggest changes and so on as they see fit. They can also reject initial proposals early.

Labels and assignees are managed in different ways (automatically by a bot, manually, self-assignment, etc).

If an assignee is pleased with the initial proposal, they can ask to submit a fullblown solution. This moves us to the next step. Assignees should provide their expectations of the solution (e.g. what should be covered in the document, additional requirements, etc).

Submitting a solution

PRs can only be submitted once all previous stages are completed. PRs should be submitted in perl6/problem-solving repository. The document in the PR should act as a documentation for the solution (as it will also be read later after it is accepted). This time all details should be provided. Keep your document consistent with other files in the repository (naming, directory structure, markup and so on).

Assignees will request changes that are necessary to finalize the solution. Note that this process may require an actual implementation (if applicable) and other efforts (possibly in other repos) if so is required by the assignee.

If there are common principles that are used for a particular label, assignees are welcome to compose a document in order to avoid repeating themselves.

Note that all people (even non-devs) who have enough experience in affected areas are welcome to provide feedback. That being said, the assignee has the final word on decisions in the issue/PR, so they are free to engage in discussions as they see fit. In rare cases they can moderate/lock the discussion if doing so is unavoidable.

Once the assignee is happy with the proposal, the process moves to the next step.


A review is requested from all of the reviewers (see the list). This step exists to ensure peer-review and to notify the devs of the major upcoming changes. By approving a PR the dev confirms that they reviewed and understood the proposal, and that they are OK with it. This is also the last chance to express concerns and present feedback (though it is encouraged to do that before this step is reached).

It is expected that all reviewers will understand the reasoning of the solution and in the end all of them will approve the PR. This may require time, discussion, and minor adjustments, but if it happens that the discussion doesn't lead to mutual understanding, the BDFL may step in.

This is the final step. Once the PR is merged, it is expected that corresponding efforts (e.g. PRs in other repos) are merged too, and the future work is already outlined. This is the last step.

Edge cases and other notes

  • If any of the merged solutions needs an adjustment, the process should start from the beginning. That is, an issue should be filed stating the problem with the current solution, and the process continues as normal. PRs are allowed to change, modify and shadow existing solutions.
  • Assignees are allowed to call for a “shortcut” to any problem, in which case the solution is applied directly without going through the whole process.
  • Non-functional changes to existing solutions automatically go through a shortcut (typos, grammar, formatting, etc.), just submit a PR right away.
  • If a shortcut receives any criticism from the corresponding development team or other affected parties, it can be reverted and the full formal process should begin.
  • If a reviewer does not respond in 14 days, they are removed from the list of reviewers on that PR.
  • Passing the assignee status is allowed provided that the receiving party agrees. One-time assignees are allowed through this process.
  • People are allowed to be assigned to their own PRs.
  • If everything else fails, BDFL can force any change as they like, though this should only be used in exceptional cases.

Labels and responsible devs

File a meta issue if you want to create a new label or if you want to be added as a responsible dev.


File a meta issue if you want to be added to this list.

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