rdmbair15m5-changelog-20260822-1647-brew-default-app-install-policy-and-obsidian-verification

Configured default Homebrew application installation policy across all agent surfaces (Claude Code, Codex, Antigravity) and fleet nodes, and verified Homebrew Cask installation of Obsidian 1.13.7 across all six Mac hosts.

Summary

Enforced global fleet policy Rule 27 requiring Homebrew (brew install / brew install --cask) as the default application and package installer across the fleet, updated all agent guidelines (AGENT_COORDINATION.md, CLAUDE.md, AGENTS.md, GEMINI.md), synchronized them across all 5 lead/client nodes plus jdmbair13m5, and confirmed Obsidian 1.13.7 presence via Homebrew Cask on all hosts.

Scope

• Hosts: rdmbair15m5 (local), rdmsm4x, rdmbair13m5, rdmpw3265m, rdmpw3275m, jdmbair13m5
• Agents: Claude Code, Codex CLI, Antigravity CLI (agy), teamwork multi-agent coordinators

Files Touched

• ~/.agent-coordination/AGENT_COORDINATION.md (Added Rule 27)
• ~/.claude/CLAUDE.md (Injected fleet-brew-default v1 block)
• ~/.codex/AGENTS.md (Injected fleet-brew-default v1 block)
• ~/.gemini/GEMINI.md (Injected fleet-brew-default v1 block)

Commands Run

• brew list --cask obsidian || brew install --cask obsidian (verified on all 6 hosts)
• scp ~/.agent-coordination/AGENT_COORDINATION.md ~/.claude/CLAUDE.md ~/.codex/AGENTS.md ~/.gemini/GEMINI.md richh@<host>: (propagated across fleet)
• shasum -a 256 verification across all hosts (confirmed 100% checksum match)

Verification Evidence

• Obsidian Cask verified installed at /opt/homebrew/Caskroom/obsidian/1.13.7/Obsidian.app (Apple Silicon) and /usr/local/Caskroom/obsidian/1.13.7/Obsidian.app (Intel).
• Synchronized sha256 checksums across all 5 primary fleet hosts:
  • AGENT_COORDINATION.md: 05bd19a7031d40141b81640f94fe6c9ae1d5e0e74571f41005b472166f6d3ce2
  • CLAUDE.md: 7d37879c99b0db1c62dcf5b16450bcf7612f2234f6fb9cc2406c021d023281ba
  • AGENTS.md: e17a187cf422e814b17851c16d3bfb0222ee3f023cabf039b3104ae119cbd041
  • GEMINI.md: 6f6127ae9a0282d0a967c977a8e9f8af574dc50192f3b187da6b324be3a5feb5

How to Undo

• Revert Rule 27 from ~/.agent-coordination/AGENT_COORDINATION.md and re-sync across fleet nodes.