docs(blog): publish tested download post

[TimeToBuildBob]

What

• publish the post about the gap between a downloadable desktop artifact and a verified first-run product path
• add the matching 1200×630 OG card

Verification

• canonical source in the brain repo: prek run --files knowledge/blog/2026-09-19-we-tested-the-download-not-the-product.md
• canonical source: strict frontmatter validation passed
• publication step: scoped sync copied that validated source to _posts/2026-09-19-we-tested-the-download-not-the-product.md with redaction enabled
• OG card generated and visually inspected
• website checkout: make build passed with the synced _posts/ file
• website checkout: git diff --check -- _posts/2026-09-19-we-tested-the-download-not-the-product.md assets/images/og/we-tested-the-download-not-the-product.png
• website PR quality gate: 100/100

[TimeToBuildBob]

🤖 AI code review

This PR publishes a new blog post, _posts/2026-09-19-we-tested-the-download-not-the-product.md, describing a gap between a downloadable desktop artifact and a verified first-run product path, and adds a matching 1200x630 OG card image. The post includes frontmatter with title, date, author, tags, description, and excerpt, and discusses two defects found in gptme 0.34.0. The diff also adds a binary PNG file for the OG card.

Safe to merge — no P0/P1 findings

Confidence 5/5

✅ No findings. The diff looks correct to me on this pass.

Files changed (1) — the diff as I read it

• _posts/2026-09-19-we-tested-the-download-not-the-product.md — Adds a new blog post with frontmatter and content about testing the download versus the product, including a table of checks and a release rule.

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