Record skipped Codex alpha5 release rollup

[yvette-carlisle]

Summary

• records a skipped social_post/v1 release_rollup decision for openai/codex rust-v0.137.0-alpha.5
• preserves the evidence gate: new checkpoint exists, but the 118-commit / 117-PR window has only one mapped Decodex signal, so @decodexspace should not publish a release rollup yet
• notes that Chrome publication and media generation were not attempted because the source-evidence gate failed first

Evidence

• latest prerelease checkpoint: https://github.com/openai/codex/releases/tag/rust-v0.137.0-alpha.5
• compare window: openai/codex@rust-v0.136.0...rust-v0.137.0-alpha.5
• mapped signal: site/src/content/signals/openai-codex-pr-25636.json

Validation

• decodex radar validate artifacts/social/x

Persistence

• artifact committed at artifacts/social/x/posts/2026-06-04/openai-codex-rust-v0-137-0-alpha-5-release-rollup.json

[yvette-carlisle]

Closing as part of the publisher/release automation reset. This PR is superseded by the new automation design pass; do not merge or use it as current publication/checkpoint authority.