Add sidebar CTA below blog TOC (for top 25 visited blog)

[patrickholcomb9]

What

Adds an opt-in text + button CTA that renders directly below the table
of contents in the sticky right rail on standard blog post layouts.
Enabled per post via a new sidebarCta frontmatter field:

sidebarCta:
text: "Blurb copy."
buttonLabel: "Button label"
href: "/relative/path?ref=..."

Applied to the 25 posts in the CTA mapping doc, each with its own
copy/target from that doc.

Performance

No client JS added. BlogSidebarCta is a plain server component (no
"use client", no observers/listeners) — it reuses ButtonLink/
Button, which every blog post already loads for the CTA at the
bottom of the article, so this ships zero new JS bundle bytes. It's
rendered inside the TOC's existing sticky wrapper, which is already
hidden below the lg breakpoint, so nothing changes on mobile. No new
images, fonts, or network requests. Doesn't touch the hero/above-the-
fold content, so no LCP impact.

Files

• app/(v1)/blog/[slug]/BlogSidebarCta.tsx — new component
• app/(v1)/blog/[slug]/page.tsx — wires it in below BlogToc,
  gated on scope.sidebarCta
• AGENTS.md — documents the new frontmatter field
• 25 content/blog/*.mdx/.md files — sidebarCta frontmatter per
  the CTA mapping doc

Notes

• One copy correction: introducing-agent-evals had a typo in the
  source doc ("Continuously iimprove agents...") — fixed to "improve".
• Target URLs from the doc were converted to relative internal links
  with ?ref=blog-<slug>-sidebar tags, per repo convention.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
website	Ready	Preview	Aug 5, 2026 9:16pm

[gester-bot]

Straightforward, well-scoped addition: a new opt-in sidebarCta frontmatter field renders a small CTA below the blog TOC via a new server component, with frontmatter added to 25 posts. Verified the component logic, the ArticleSection wiring, and that all referenced hrefs (docs pages, customer stories) resolve to real routes — no issues found.