chore: improve PR command summary format with rich bullet style

.claude/commands/pr.md

@@ -26,14 +26,28 @@ Then generate a PR title that:
 - Matches the style of recent commits in the repository
 
 Generate a PR body with:
-- A `## Summary` section with 1-3 bullet points describing the changes
+- A `## Summary` section using rich bullets with bold action leads
 - A `Closes #X` line for each issue number (if any were provided or detected from branch name)
 
+Each Summary bullet must follow this format:
+- **Bold action phrase** (imperative verb: "Add X", "Replace Y", "Fix Z") — followed by em dash and a 1-2 sentence conceptual description of what changed and why
+- Keep descriptions conceptual — no inline code references (no backticks for function/file names). The diff shows the code
+- Use 2-5 bullets, scaling with PR size. Group related changes into single bullets rather than listing every file touched
+
+Example:
+```
+## Summary
+
+- **Add preflight validation** — validates repo path, config, and credentials before agent execution. Fails fast with actionable errors
+- **Replace error strings** — pipe-delimited segments rendered as multi-line blocks with phase context, type, message, and remediation hint
+- **Add error classification** — new error codes for repo, auth, and billing failures with proper retry classification
+```
+
 Finally, create the PR using the gh CLI:
 ```
 gh pr create --base main --title "<generated title>" --body "$(cat <<'EOF'
 ## Summary
-<bullet points>
+<rich bullets>
 
 Closes #<issue1>
 Closes #<issue2>
@@ -45,6 +59,5 @@ Note: Omit the "Closes" lines entirely if no issues are associated with this PR.
 
 IMPORTANT:
 - Do NOT include any Claude Code attribution in the PR
-- Keep the summary concise (1-3 bullet points maximum)
 - Use the conventional commit prefix that best matches the changes (fix, feat, chore, refactor, docs, etc.)
 - The `Closes #X` syntax will automatically close the referenced issues when the PR is merged