revisão e complementação da documentação do projeto

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Marcos Lohmann
2026-09-14 14:54:28 -03:00
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# ADR-020: Downstream identity: token exchange or isolated service account
**Status:** Accepted.
**Source:** this ADR is the canonical record of this decision. For implementation and validation context, see `RI/docs/AS-BUILT.md` and, when applicable, the relevant contract in `RI/docs/interfaces/`.
## Context
Downstream identity in the RI (closes G5/P5).
## Decision
Token exchange (RFC 8693) when the backend supports OIDC; otherwise a service account isolated per adapter.
## Alternatives Considered
Always reusing the client's token (forbidden by ADR-006).
## Consequences
EP-07; documented per backend in the manifest.