docs: ADR 0015 — remain on CouchDB; fix query/index performance in place#1778
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…n place Records the outcome of the DocumentDB migration evaluation (#1700): remain on CouchDB and address server-side indexing/query performance in place (index-design audit + extending ADR 0011 response caching) rather than re-platform. Also captures the previously-implicit low-cost, cloud-agnostic scaling strategy (homogeneous cheap peers via multi-master replication) as the binding constraint DocumentDB's open-source stack cannot meet. FTS is already solved offline via our trigram engine (ADR 0009), so Nouveau is explicitly not adopted. Closes #1700 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
johan-bell
approved these changes
Jul 7, 2026
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Records the outcome of the DocumentDB migration evaluation in #1700.
Decision
Remain on CouchDB. Do not re-platform to the open-source DocumentDB / FerretDB stack. Address the server-side indexing/query-performance concerns within CouchDB (index-design audit + extending ADR 0011 response caching).
Why
_changesfeed and multi-master replication) that the open-source DocumentDB stack does not provide.Scope
Single new file:
docs/adr/0015-remain-on-couchdb.md. No code changes.Closes #1700
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