feat: Flatten Explore section into Product sidebar with section headers

[sfanahata]

Summary

Flattens the product/explore/ section, moving its 6 child directories up to product/ so features like Logs, Traces, and Session Replay are visible at L2 instead of buried at L3.

Adds sidebar section headers (Detect, Debug, Measure, Automate, Platform) to the Product sidebar using the existing sidebar_section mechanism.

Rewrites the Product index page and Getting Started section to reflect Sentry's current product positioning and feature set. Deletes the orphaned /product/onboarding/ section. Hides dated tutorials (distributed-tracing, integrate-frontend, integrate-backend) from sidebar while keeping URLs functional. Fixes broken links, dead references, and stale content across sentry-basics sub-pages.

Changes

Code changes (3 files):

• Extended sidebar_section in dynamicNav.tsx, frontmatter.ts, types.ts to support 5 new section values: detect, debug, measure, automate, platform

File moves (6 directories, ~89 files):

• product/explore/trace-explorer/ → product/trace-explorer/
• product/explore/logs/ → product/logs/
• product/explore/session-replay/ → product/session-replay/
• product/explore/profiling/ → product/profiling/
• product/explore/metrics/ → product/metrics/
• product/explore/discover-queries/ → product/discover-queries/

Content updates:

• Rewrote product/index.mdx — organized around Detect/Debug/Measure/Automate sections, added missing features (Logs, Seer, Snapshots, Size Analysis, AI Agents Monitoring), removed dated sections
• Rewrote product/sentry-basics/index.mdx — 4-step getting started hub (Connect Source Code → Set Up Alerts → Turn On Features → Explore Data), links to Guides, Cookbook, Sandbox
• Rewrote product/sentry-basics/performance-monitoring.mdx — removed duplicated paragraphs, stale Early Adopter reference, added Connected Context section (Logs, Replay, Profiling, Seer)
• Fixed broken links in tutorial sub-pages (dead /guides/integrate-* paths, dead /product/sentry-basics/enrich-data/ link)
• Fixed typo and code syntax error in user-feedback-basics.mdx
• Fixed broken blog.sentry.io URLs in session-replay performance-overhead pages

Deleted content:

• Removed product/onboarding/ (3 pages, orphaned — only 1 self-referencing inbound link, not linked from homepage or SDK pages)
• Hidden 3 dated tutorials from sidebar: distributed-tracing/, integrate-frontend/, integrate-backend/ (URLs still work for featureInfo.tsx references)

Frontmatter updates (~25 files):

• Every product/*/index.mdx gets sidebar_section and updated sidebar_order

Link updates (~200 files):

• All internal references to /product/explore/* updated to /product/*
• Removed 4 self-referencing redirect loops in middleware.ts
• Fixed broken blog.sentry.io URLs (date-prefixed → dateless format)

Redirects:

• Added redirects from old /product/explore/* paths to new locations
• Added redirects from /product/onboarding/* to /product/sentry-basics/
• Updated existing redirect destinations in redirects.js and middleware.ts

Section assignments

Section	Pages
Detect	Issues, User Feedback, Snapshots, Size Analysis
Debug	Traces and Spans, Logs, Session Replay, Profiling, Application Metrics, Log and Trace Drains, Discover
Measure	Dashboards, Releases, Stats
Automate	AI in Sentry, Monitors and Alerts
Platform	Build Distribution, Projects, Sentry Notifications, Sentry Toolbar, Relay, Partnership Platform

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Project	Deployment	Actions	Updated (UTC)
sentry-docs	Building	Preview, Comment	Jun 29, 2026 8:52pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
develop-docs	Ignored	Preview	Jun 29, 2026 8:52pm

[sentry]

Bug: The redirect for /product/explore lacks a trailing slash, causing 404s for users visiting the canonical URL.
_{Severity: MEDIUM}

Suggested Fix

Update the source property for the redirect in redirects.js to include a trailing slash. Change '/product/explore' to '/product/explore/' to ensure it correctly matches the canonical URL and redirects users as intended.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: redirects.js#L1684-L1686

Potential issue: The project is configured with `trailingSlash: true` in
`next.config.ts`, which establishes URLs with a trailing slash as the canonical version.
A new redirect has been added for the removed `/product/explore` page, but its source is
`'/product/explore'` without a trailing slash. Consequently, this redirect will not
match requests for the old canonical URL `/product/explore/`, leading to a 404 error for
users with bookmarks or direct links to that URL.

_{Did we get this right? 👍 / 👎 to inform future reviews.}

[antonis]

The RN side LGTM 🙏

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

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[cursor]

Discover placed in Debug section

Medium Severity

This commit assigns Discover sidebar_section: debug, so it appears under the sidebar’s Debug group with traces and logs. The PR’s section plan lists Discover under Advanced, and the updated Product walkthrough index does not include Discover under Debug.

 

^{Reviewed by Cursor Bugbot for commit c5e6971. Configure here.}