rdmbair15m5 XEntropy local skill installation

Installed the values-free xentropy-local Codex skill so the local agent has the reviewed metadata-only credential-catalog workflow and cannot treat a queued request as a completed provider rotation.

• Scope: rdmbair15m5 only.
• Files installed: ~/.codex/skills/xentropy-local/SKILL.md and ~/.codex/skills/xentropy-local/agents/openai.yaml.
• Source: the validated canonical copies on rdmsm4x.
• Actions: pinned the SSH host key, verified scutil --get ComputerName, copied into an isolated temporary directory, verified both SHA-256 digests, and atomically moved the directory into the Codex skill root.
• Verification: SKILL.md SHA-256 6650fe0492ed2d519d7e4b06ae394eb2ab40218bac5e768fcafd367c76661b22; openai.yaml SHA-256 6b835bf61bcf536e94f0b049df2c327a2b13f136e41e9fc4a77a46a1c4a66108.
• Backup: none was needed because the destination did not exist. The deployment would have moved a concurrently created destination to ~/.codex/skills-backups/ instead of overwriting it.
• Undo: move ~/.codex/skills/xentropy-local to a retained quarantine directory; do not delete it until adoption evidence has been reviewed.
• Outstanding owner actions: start a new Codex task (skills are loaded on the next turn), perform the XEntropy local-cli bootstrap from the foreground GUI session if still pending, and publish this record to the rdmbair15m5 Apple Notes folder. No credential values, provider calls, imports, validations, or rotations occurred.