[mason] Chat app: Capabilities refresh no longer wipes the conversation - #524
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akansal2 wants to merge 1 commit into
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[mason] Chat app: Capabilities refresh no longer wipes the conversation#524akansal2 wants to merge 1 commit into
akansal2 wants to merge 1 commit into
Conversation
The runtime "Capabilities" refresh button (#refresh-config → loadConfig) also
re-hydrated the chat log from the persisted transcript. Re-hydration rebuilds the
log from the checkpoint/session-store transcript, dropping browser-only messages
(errors) and empty-content assistant tool-call ("Tool request") bubbles — so
clicking refresh made messages disappear.
Give loadConfig a `hydrateChat` flag: the Capabilities refresh now passes
hydrateChat=false (refresh the capability indicators only, leave the conversation
alone), while initial page load still hydrates so a reload restores the
conversation. Applied to both the langgraph and openai chat-app templates.
Co-authored-by: Isaac <no-reply@databricks.com>
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What
In the Mason chat-app templates, the runtime Capabilities refresh button (
#refresh-config→loadConfig) also re-hydrated the chat log from the persisted transcript. Re-hydration rebuilds the log from the checkpoint / Session-Store transcript, which omits browser-only messages (errors) and empty-content assistant tool-call ("Tool request") bubbles — so clicking the Capabilities ↻ made messages disappear from the conversation.Fix
Give
loadConfigahydrateChatflag:loadConfig({ hydrateChat: false })— refreshes the capability indicators only, leaves the conversation intact.loadConfig()defaults totrue), so a reload still restores the conversation from the transcript.Applied to both chat-app templates:
agent-langgraphandagent-openai.Testing
Scaffolded a langgraph chat app and ran it locally with
mason dev: reproduced the bug (Capabilities ↻ dropped the tool-call and answer bubbles), applied the fix, hard-refreshed, and confirmed the Capabilities ↻ now leaves the conversation intact while a full page reload still restores it.