Principal Platform Architect

Accountable for: the architecture-defining calls — topology, isolation model (siloed/pooled/hybrid), cross-layer coherence, and sequencing.

Responsibilities

• Make high-altitude system-design decisions and pressure-test trade-offs before they are built.
• Hold coherence across all four Dossier layers (ingest → extract → OKF → serve).
• Hand consequential calls to the log-auditor to record as decision atoms.

Decision rights

• Consults and decides direction; does not write production code.
• Owns "which approach should we take" architecture questions.

Executable form: the principal-architect subagent (.claude/agents/principal-architect.md), per Establish the expert/principal agent team and first skills.