PR description

Use the section order in .github/pull_request_template.md: change-count header, What, Why, Before / After, How, Testing, Checklist. Preserve the rest of an existing PR description when updating it.

Change-count header

Begin every PR description with these three lines, using Markdown hard line breaks so each renders separately:

Code changes: +<added> -<deleted>
Tests: +<added> -<deleted>
Others: +<added> -<deleted>

Calculate the numbers from the net diff against the PR's actual base. For a local branch, use git diff --numstat <base>...<head>. After pushing, prefer GitHub's per-file additions and deletions. Recalculate after the final push rather than summing commit churn or estimating counts.

Count every changed file exactly once:

• Code changes: handwritten implementation, including SQL, migrations, styles, and executable scripts.
• Tests: test code, fixtures, snapshots, and test-only helpers.
• Others: generated or vendored files, lockfiles, documentation, configuration, and assets. Generated output belongs here even when it contains source code.

Show +0 -0 for empty categories. Binary files have no line count; mention their count separately when present. Add a brief qualifier when useful, such as Others: +11 -0 (generated sqlc).

Before / After

Every PR has a ## Before / After section with a two-column table, one row per behavior that changed:

| Before | After |
| --- | --- |
| ![Before: empty model list](before.png) | ![After: list filtered to six models](after.png) |
| `ao session ls` exits 1 when a project has no sessions | Prints `No sessions` and exits 0 |