docs(blog): v2.9.8 + v2.9.9 post — "A smoother fresh install"
High-level recap of the install-UX sprint for the MkDocs blog. Covers:
- What the three-round fresh-install test surfaced
- Install-day improvements that shipped in v2.9.8 (host-port
preflight, Pangolin smoke test, admin password file,
--enable-all installing systemd units, Next Steps verify
pointer)
- Teardown scripts (pangolin-teardown.sh, ccp-deregister.sh) and
CCP's deleteInstance tunnel cleanup
- CCP registration polish (slug-conflict 409, poll-rate-limit
split, agent exponential backoff)
- Release hygiene in v2.9.9 (--replace safety, whitelist parity,
install.sh extract preservation on TTY failure)
- Brief "what's next / deferred" section
Placed under mkdocs/docs/blog/posts/ with the date-prefix filename
convention used by 2026-03-27-test-blog-post.md.
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