[AIGTWY-4756] Cache managed config reads for 5 min between launches - #696
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Unity Gateway fetched the workspace managed coding-agent config from the control plane on every non-dry-run launch, even when it had just been read. Reuse a read younger than a 5-minute TTL so back-to-back launches stop re-fetching, while every `ug configure` path reads fresh. - refresh_managed_config gains force_refresh; launches use the cache by default, and the configure paths pass force_refresh=True (including the AI-tools install gate, which runs only during configure). - Persist retrieved_at plus an outcome (published / none / feature_disabled) as wrapper metadata, leaving the raw config verbatim for ug export. - Invalidate the cache on a missing, unparseable, or future-dated stamp, a wrong workspace, or an age at/over the TTL; failed refreshes never advance the stamp, so a stale read cannot masquerade as fresh. - Harden read_json_safe against non-UTF-8 bytes so a corrupted cache file read on every launch reads as absent rather than crashing the launch. - Add a managed integration test: a launch within the TTL reuses the cached read (retrieved_at unchanged), and a backdated stamp forces a fresh read. Co-authored-by: Isaac <no-reply@databricks.com>
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Unity Gateway fetched the workspace managed coding-agent config from the control plane on every non-dry-run launch, even when it had just been read. This reuses a recent read so back-to-back launches stop re-fetching, while
ug configurealways reads fresh.ug configurereads fresh instead, both the main path andug configure --agent(whose only managed read is the AI-tools install gate), so it never decides from a since-changed config.ug export.Successful no-config and feature-disabled reads are cached for the TTL, so after an admin enables the feature or publishes a config a launch may take up to five minutes to pick it up;
ug configurereads fresh and is unaffected. Dynamic budget recommendation reads stay per-launch, unchanged.This pull request and its description were written by Isaac.