Specs

• platform.md — what the substrate is, its boundary, security floor, tenancy, adoption plan, and success criteria. Start here.
• credential-boundary.md — the ADR-0006 migration ledger: which credential class rides which write shape, what is done, and what each remaining one waits on.
• adr/ — one record per settled decision, with the context and evidence that produced it. The platform spec states what; the ADRs carry why.