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docs(adr): spaces membership — app-owned default, IdP-write optional (#212) #219

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Cordy merged 1 commit from docs-adr-spaces into main 2026-08-13 15:19:59 +00:00
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Cordy commented 2026-08-13 15:19:41 +00:00
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Records the spaces/membership architecture decision (Option C) as docs/adr/0001-spaces-membership.md, closing #212.

Captures: the current IdP-write coupling and why it doesn't generalise, the three options with a security/trust comparison, the chosen app-owned model (membership in the encrypted state-backend; IdP groups read-only; IdP-write demoted to an optional documented power mode), the industry grounding (Nextcloud, Google/SharePoint, Keycloak's read-vs-write privilege line), consequences, and the #211 rollout order.

Docs only. The ARCHITECTURE.md cross-link rides with the handbook pass (#218).

Records the spaces/membership architecture decision (Option C) as `docs/adr/0001-spaces-membership.md`, closing #212. Captures: the current IdP-write coupling and why it doesn't generalise, the three options with a security/trust comparison, the chosen app-owned model (membership in the encrypted state-backend; IdP groups read-only; IdP-write demoted to an optional documented power mode), the industry grounding (Nextcloud, Google/SharePoint, Keycloak's read-vs-write privilege line), consequences, and the #211 rollout order. Docs only. The `ARCHITECTURE.md` cross-link rides with the handbook pass (#218).
docs(adr): spaces membership — app-owned default, IdP-write optional (#212)
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Cordy merged commit 257702207b into main 2026-08-13 15:19:59 +00:00
Cordy deleted branch docs-adr-spaces 2026-08-13 15:20:03 +00:00
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Reference: Cordy/Cairn#219
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