[BenGSchulz]

Summary

CAS reported that, on Alpha with the Wind renderer, an agent's history panel showed "There are no conversations yet." until the first message was sent (MST-18207, Slack). The widget loads history correctly; the chat dropped it.

1. History set while the chat mounts is shown (fix)

useChatHistory seeded its list from getHistory() during render but subscribed to SetHistory and ShouldShowLoadingMoreHistory in a passive effect. A setHistory landing in between was stored on the service and never reached the list, so it stayed empty, with a stale "has more", until the next setHistory.

uipath-ui-widgets mounts <ApChat> and fetches the first history page in the same commit. Wind is lazy-loaded behind Suspense, and React 19 can hold the reveal (and the effects) back long enough for the fetch to resolve in that gap. On the first message the widget pushes its own copy again ([newConversation, ...pastConversations]), which is why history then appeared, ending in a "loading more" spinner.

The effect now re-reads the service's history and "has more" right after subscribing. Material shares the hook, so it gets the fix too.

2. A conversation set while the chat mounts is shown (fix)

useChatMessages had the same shape: seeded from getConversation() in render, subscribed to SetConversation, Request, Response and NewChat in an effect. It now re-reads the conversation after subscribing, the same way. The service stores the whole transcript and the hook changes nothing before subscribing, so the re-read gives what the seed would have been at that moment (fake streaming stripped, as on mount). CAS does not hit this one today, since it sets the conversation before mounting the chat.

AutopilotChatStateProvider already catches up on suggestions this way. Its other values are left as they are: it mounts in ChatRoot outside the Suspense boundary, and hosts set them through config before mounting.

Testing

• Unit tests: a sibling that renders after the hook calls setHistory / setConversation before effects run. Both failed before the fix. The history test also checks that a "done" set in the gap stops the short list from asking for more.
• Biome and tsc are clean.
• The full src/chat run has the same failures locally with and without this change (Material-renderer suites that do not load under local vitest).
• Not verified in the CAS widget against Alpha.

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Dependency License Review

• ✅ 1958 package(s) scanned
• ✅ No license issues found
• ⚠️ 2 package(s) excluded (see details below)

License distribution

License	Packages
MIT	1722
ISC	91
Apache-2.0	57
BSD-3-Clause	28
BSD-2-Clause	23
BlueOak-1.0.0	8
MPL-2.0	4
CC0-1.0	4
MIT-0	3
MIT OR Apache-2.0	2
(MIT OR Apache-2.0)	2
Unlicense	2
LGPL-3.0-or-later	1
Python-2.0	1
CC-BY-4.0	1
(MPL-2.0 OR Apache-2.0)	1
Unknown	1
Artistic-2.0	1
(WTFPL OR MIT)	1
(BSD-2-Clause OR MIT OR Apache-2.0)	1
CC-BY-3.0	1
0BSD	1
(MIT OR CC0-1.0)	1
MIT AND ISC	1

Excluded packages

Package	Version	License	Reason
@img/sharp-libvips-linux-x64	1.3.4	LGPL-3.0-or-later	LGPL pre-built binary, not linked
khroma	2.1.0	Unknown	MIT per GitHub repo, missing license field in package.json

[github-actions]

Storybook visual diff

⚠️ Visual changes detected: 2 changed (of 8 compared, 6 unchanged). View report

Baseline is the deployed main Storybook, so changes merged to main after this branch was last updated can also appear here. Logs

Updated (PT): Nov 12, 2026, 10:53:17 AM

[github-actions]

📊 Coverage + size by package

Per-package coverage and bundle size on this PR. New-line coverage = of the source lines this PR adds or changes, the % hit by tests.

Package	Coverage	New-line coverage	Packed (gzip)	Unpacked	vs main
@uipath/apollo-core	—	—	42.02 MB	50.17 MB	±0
@uipath/apollo-react	59.8%	100.0% (3/3)	2.49 MB	14.02 MB	+49 B
@uipath/apollo-ui-icons	—	—	2.86 MB	6.97 MB	±0
@uipath/apollo-vertex	—	—	—	—	—
@uipath/apollo-wind	—	—	897.6 KB	5.07 MB	−3 B
@uipath/ap-chat	85.8%	—	40.48 MB	46.10 MB	+33 B

_{"Coverage" is each package's own coverage.include scope (e.g. apollo-core instruments only scripts/). "Packed"/"Unpacked" come from npm pack --dry-run and only cover built packages — "—" means not measured this run (package not affected / not built). "vs main" is the packed (gzipped) delta against the last successful main build (the package-sizes artifact from the Release workflow); "—" there means no main baseline was available this run. The baseline is main's latest build, not this PR's exact merge-base, so it includes any drift since the branch diverged. Packages with no vitest config are omitted.}