Reserve Decodex X post for PR 26687

[yvette-carlisle]

Summary

• Add and consume a thin social_publish_reservation/v1 for openai-codex-pr-26687.
• Persist the terminal social_post/v1 publication record for the Decodex X post.

Publication

• Candidate: openai-codex-pr-26687
• decision.worthiness: publish
• Mode: operator_impact
• Published URL: https://x.com/decodexspace/status/2064468019414552591
• Media: text-only; no generated media attached because this non-release operator-impact post was valuable through source-backed text plus the GitHub PR card.

Evidence

• Durable social_post/v1 and social_publish_reservation/v1 records had no PR26687 slug/key/source match before reservation.
• Open publication PR scan only found PR Persist PR 27007 daily-cap social block #265 for PR27007 daily-cap block.
• Chrome X account readback switched from @hackink to @decodexspace before reservation/compose.
• Live @decodexspace profile readback before reservation and immediately before Post showed no PR26687 lead/source match.
• Home timeline and independent permalink readback confirmed the post, @decodexspace account, Automated by @hackink attribution, GitHub PR #26687 card, and no attached media.

Validation

• cargo run -p decodex --bin decodex -- radar validate artifacts/github/social-candidates artifacts/social/x -> OK (60 Radar artifact JSON files validated)

Scope

• Diff limited to artifacts/social/x/reservations/ and artifacts/social/x/posts/.
• No generated media committed.