• When you first install the app, the default mode for the describe tool is:

pr_commands = ["/describe", ...]

meaning the describe tool will run automatically on every PR.

• Markers are an alternative way to control the generated description, to give maximal control to the user. If you set:

pr_commands = ["/describe --pr_description.use_description_markers=true", ...]

the tool will replace every marker of the form pr_agent:marker_name in the PR description with the relevant content, where marker_name is one of the following:

• type: the PR type.
• summary: the PR summary.
• walkthrough: the PR walkthrough.
• diagram: the PR sequence diagram (if enabled).

Note that when markers are enabled, if the original PR description does not contain any markers, the tool will not alter the description at all.

The default labels of the describe tool are quite generic: [Bug fix, Tests, Enhancement, Documentation, Other].

If you specify custom labels in the repo's labels page or via configuration file, you can get tailored labels for your use cases.
Examples for custom labels:

• Main topic:performance - pr_agent:The main topic of this PR is performance
• New endpoint - pr_agent:A new endpoint was added in this PR
• SQL query - pr_agent:A new SQL query was added in this PR
• Dockerfile changes - pr_agent:The PR contains changes in the Dockerfile
• ...

The list above is eclectic, and aims to give an idea of different possibilities. Define custom labels that are relevant for your repo and use cases.
Note that Labels are not mutually exclusive, so you can add multiple label categories.
Make sure to provide proper title, and a detailed and well-phrased description for each label, so the tool will know when to suggest it.

For enhanced user experience, the describe tool can add file summaries directly to the "Files changed" tab in the PR page.
This will enable you to quickly understand the changes in each file, while reviewing the code changes (diffs).

To enable inline file summary, set pr_description.inline_file_summary in the configuration file, possible values are:

• 'table': File changes walkthrough table will be displayed on the top of the "Files changed" tab, in addition to the "Conversation" tab.
• true: A collapsable file comment with changes title and a changes summary for each file in the PR.
• false (default): File changes walkthrough will be added only to the "Conversation" tab.

The describe tool can be configured with extra instructions, to guide the model to a feedback tailored to the needs of your project.

Be specific, clear, and concise in the instructions. With extra instructions, you are the prompter. Notice that the general structure of the description is fixed, and cannot be changed. Extra instructions can change the content or style of each sub-section of the PR description.

Examples for extra instructions:

[pr_description]
extra_instructions="""- The PR title should be in the format: '<PR type>: <title>'
- The title should be short and concise (up to 10 words)
- ...
"""

Use triple quotes to write multi-line instructions. Use bullet points to make the instructions more readable.

To invoke the PR-Agent, add a comment using one of the following commands:

• /review: Request a review of your Pull Request.
• /describe: Update the PR title and description based on the contents of the PR.
• /improve [--extended]: Suggest code improvements. Extended mode provides a higher quality feedback.
• /ask <QUESTION>: Ask a question about the PR.
• /update_changelog: Update the changelog based on the PR's contents.
• /help_docs <QUESTION>: Given a path to documentation (either for this repository or for a given one), ask a question.
• /add_docs 💎: Generate docstring for new components introduced in the PR.
• /generate_labels 💎: Generate labels for the PR based on the PR's contents.
• /analyze 💎: Automatically analyzes the PR, and presents changes walkthrough for each component.

See the tools guide for more details.
To list the possible configuration parameters, add a /config comment.