docs(merge-queue): document metrics drill-down PR list

[samgutentag]

Summary

• Adds a new section to the Metrics and Monitoring page describing the metrics drill-down feature
• Documents how to click a chart data point to view individual PRs for that time range
• Covers filter options: date range, conclusion, impacted targets

Source

• trunk2 PR: https://github.com/trunk-io/trunk2/pull/3539 (Initial metrics drill details page)
• Linear: https://linear.app/trunk/issue/TRUNK-17995/changelog-and-docs-for-metrics-drilling

Test plan

• Preview in GitBook

[trunk-staging-io]

✨ Submitted to Merge by Sam Gutentag (a GitHub user). It will be added to the merge queue once all branch protection rules pass and there are no merge conflicts with the target branch. See more details here.

[claude]

Claude finished @samgutentag's task in 1m 12s —— View job

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PR Review

• Gather context
• Read changed files
• Check CLAUDE.md for repo guidelines
• Review documentation for typos, grammar, and formatting
• Post inline comments for specific issues
• Provide final review summary

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Summary

The PR adds a ### Drill into a metrics data point section with filter documentation. The content is accurate, but there are two issues worth addressing:

Blocking: Duplicate section
The page already has a ### Drill down into metrics section (lines 108–146) that covers the same feature in detail — with screenshots, "Why Drill Down?", "Select Data Points", and "Review the PR List" subsections. The new section is a shorter restatement of the same feature, which will confuse readers and fragment navigation. See inline comment at line 150.

Recommended fix: Move the new #### Filter the PR list content into the existing section (after #### Review the PR List) and drop the redundant wrapper section. The filter information is the genuinely new piece here.

Minor: Capitalization + wording (line 151)

• "Conclusion Count" and "Time in Queue" should be "Conclusion count" and "Time in queue" to match usage elsewhere in the file.
• "that point" → "that selection" (the feature supports drag-ranges, not just single clicks).

See inline comment at line 151 for a suggested replacement.

[samgutentag]

Triage status (2026-05-05): up to date with main. Needs review before merge.

[claude]

Claude finished @samgutentag's task in 1m 25s —— View job

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PR Review

• Gather context
• Read changed files and current diff
• Verify previous review feedback status
• Check for typos, grammar, formatting
• Post inline comments for any new issues
• Provide final review summary

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Summary

The diff to merge-queue/administration/metrics.md has not changed since the prior review on 2026-05-05 (only a main merge commit landed in between), so both previously flagged issues remain. I also noticed one small style consistency nit.

Blocking — duplicate section (line 150)
The new ### Drill into a metrics data point section overlaps the existing ### Drill down into metrics section (lines 108–146). The genuinely new content is the #### Filter the PR list block and the "Back to Health" tip — these should fold into the existing section rather than stand as a parallel h3.

Non-blocking — capitalization + wording (line 152)

• Conclusion Count / Time in Queue → sentence case (Conclusion count, Time in queue) to match the rest of the file.
• that point → that selection to also cover drag-range selections.

Non-blocking — em-dash consistency (lines 160–162)
The new filter bullets use - for the term/definition split, but the adjacent existing section uses —. Worth aligning when restructuring.

Net: content is accurate and the filter info is the right addition — the structural duplication is the one thing that should block merge.
| Branch

[samgutentag]

Verification status (2026-05-07): live

Verified: customers can use this. Ready to publish.

• Eng PR: trunk-io/trunk2#3539 (merged 2026-04-16)
• Linear: TRUNK-17995 (Done, completed 2026-04-22)
• Flag: none (no LaunchDarkly gate found in PR body or diff)
• Signals:
  • Merge commit on main (status: behind, merge intact)
  • No feature flag patterns in PR diff or product code (merge-metrics-pr-list.tsx)
  • Linear ticket is in Done status
  • No follow-up PRs adding filter UI to the PR list page

Branch is up to date with main. Note: original draft documented filter controls that do not exist in the implementation; corrected in 252984e.

[claude]

PR Review

• Gather context (read CLAUDE.md, current diff)
• Read changed file in current state
• Verify whether prior review feedback was addressed
• Check for typos, grammar, formatting
• Post inline comments for any new issues
• Provide final review summary

View job run | Branch

[claude]

PR Review

• Gather context (read CLAUDE.md, current diff)
• Read changed file in current state
• Verify whether prior review feedback was addressed
• Check for typos, grammar, formatting
• Provide final review summary

View job run | Branch