Chat does not sync between different machines

[matusthemostlygreat]

Type: Bug

I work constantly between multiple machines on the same pull request, and even remote to the same WAVE machine. However, chat history does not sync! This is annoying because I have to ask copilot to summarize context and then bring it with me to the other machine every time I switch.

Extension version: 0.42.2
VS Code version: Code 1.114.0 (e7fb5e9, 2026-04-01T09:27:11Z)
OS version: Windows_NT x64 10.0.26200
Modes:
Remote OS version: Linux x64 6.17.0-1008-azure
Remote OS version: Linux x64 6.17.0-1010-azure
Remote OS version: Linux x64 6.17.0-1008-azure

Logs

Trace: CodeSearchChunkSearch.updateRepoStateFromEndpoint(file:///workspace/AVP2). Updating state to Ready.
Trace: CodeSearchChunkSearch::initialize_impl success. Elapsed 3469.625854
Trace: CodeSearchChunkSearch::initialize#0 success. Elapsed 3469.7214029999996
Trace: CodeSearchChunkSearch::initialize#1 success. Elapsed 3353.4459779999997
Trace: CodeSearchChunkSearch::initialize#2 success. Elapsed 197.62230699999964
Trace: [AskAgentProvider] Wrote agent file: file:///home/matusl/.vscode-server/data/User/globalStorage/github.copilot-chat/ask-agent/Ask.agent.md
Trace: ChatStatusWorkspaceIndexingStatus::updateStatusItem(id=4): starting
Trace: CodeSearchChunkSearch::initialize#3 started
Trace: CodeSearchChunkSearch::initialize#3 success. Elapsed 0.4041670000005979
Trace: ChatStatusWorkspaceIndexingStatus::_writeStatusItem()
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [ExploreAgentProvider] Wrote agent file: file:///home/matusl/.vscode-server/data/User/globalStorage/github.copilot-chat/explore-agent/Explore.agent.md
Trace: [ExploreAgentProvider] Wrote agent file: file:///home/matusl/.vscode-server/data/User/globalStorage/github.copilot-chat/explore-agent/Explore.agent.md
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [ExploreAgentProvider] Wrote agent file: file:///home/matusl/.vscode-server/data/User/globalStorage/github.copilot-chat/explore-agent/Explore.agent.md
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [GitServiceImpl][doOpenRepository] Active repository: {"_repo":{"rootUri":{"$mid":1,"external":"file:///workspace/AVP2","path":"/workspace/AVP2","scheme":"file"},"inputBox":{},"kind":"repository","state":{},"ui":{}},"rootUri":{"$mid":1,"external":"file:///workspace/AVP2","path":"/workspace/AVP2","scheme":"file"},"kind":"repository","headBranchName":"matusl/query_coarse","headCommitHash":"0eb2cfdc8de8e8a467ec2ec70b83248a2c55be59","upstreamBranchName":"matusl/query_coarse","upstreamRemote":"origin","isRebasing":true,"remotes":["origin"],"remoteFetchUrls":["https://aiinfra.visualstudio.com/MAIA/_git/AVP"],"worktrees":[{"name":"AVP2","path":"/workspace/AVP2","ref":"refs/heads/matusl/query_coarse","detached":false,"main":true}],"changes":{"mergeChanges":[],"indexChanges":[],"workingTree":[{},{},{},{}],"untrackedChanges":[]},"_onDidChangeSignal":{"_observers":{},"debugName":"Observable Signal From Event"},"headBranchNameObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"headCommitHashObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"upstreamBranchNameObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"upstreamRemoteObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"isRebasingObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"_checkIsIgnored":{"_waitingTimeMs":1000,"_queue":[],"_timeout":null},"_isIgnored":{"_map":{},"_map2":{}}}
Debug: [context keys] Window state change. Needs offline check: false, active: false, focused: true.
Debug: [context keys] Window state change. Needs offline check: false, active: false, focused: false.
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: false.
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: true.
Debug: copilotCloudSessionsProvider#provideChatSessionItems: repoIds=[], isAgentSessionsWorkspace=false
Debug: copilotCloudSessionsProvider#provideChatSessionItems: not a GitHub repo, returning empty
Debug: [CopilotCLI] Found 0 JSONL sessions and 0 legacy sessions
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [CopilotCLI] [DIFF] getActiveDiffByTab: tab is not a diff tab
Trace: [NES][Triggerer][onDidChangeTextEditorSelection][editorSwitch] document switch disabled
Trace: [NES][Triggerer][onDidChangeTextEditorSelection] Return: document not tracked - does not have recent changes
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: false.
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: true.
Debug: copilotCloudSessionsProvider#provideChatSessionItems: repoIds=[], isAgentSessionsWorkspace=false
Debug: copilotCloudSessionsProvider#provideChatSessionItems: not a GitHub repo, returning empty
Debug: [CopilotCLI] Found 0 JSONL sessions and 0 legacy sessions

Request IDs

System Info

Item	Value
CPUs	Intel(R) Core(TM) i9-10920X CPU @ 3.50GHz (24 x 3504)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x10de, DEVICE=0x1fb0 [NVIDIA T1000], DRIVER_VENDOR=NVIDIA, DRIVER_VERSION=32.0.15.7344 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.7309 Machine model name: Machine model version: direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	63.72GB (43.55GB free)
Process Argv	--crash-reporter-id e9756e07-e8c7-4cd2-b0fd-c5da7886e2b4
Screen Reader	no
VM	0%

Item	Value
Remote	SSH: slinky
OS	Linux x64 6.17.0-1008-azure
CPUs	AMD EPYC 7763 64-Core Processor (32 x 0)
Memory (System)	125.79GB (99.69GB free)
VM	0%

Item	Value
Remote	SSH: curvy
OS	Linux x64 6.17.0-1010-azure
CPUs	AMD EPYC 7763 64-Core Processor (32 x 0)
Memory (System)	125.79GB (115.85GB free)
VM	0%

Item	Value
Remote	SSH: slinky
OS	Linux x64 6.17.0-1008-azure
CPUs	AMD EPYC 7763 64-Core Processor (32 x 0)
Memory (System)	125.79GB (99.69GB free)
VM	0%

A/B Experiments

vsliv368:30146709
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
471b6256:31240254
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
b6b4d950:31327385
63221493:31336333
envsactivate1:31464700
cloudbuttont:31379625
3efgi100_wstrepl:31403338
use-responses-api:31390855
defaultusage:31403421
je187915:31401257
ec5jj548:31422691
cmp-cht-diffpatch-lysithea-0003:31486968
metis_rerank_treatment1:31422731
cp_cls_c_966_ss:31454199
4je02754:31466945
find_all_ref_in_bg_t:31469306
c3h7c220:31478652
ge8j1254_inline_auto_hint_haiku:31431912
8g5ec713_opus_4_6:31487349
cp_cls_t_1081:31454832
conptydll_true:31485577
ia-use-proxy-models-svc:31452481
e9c30283:31461165
test_treatment2:31471001
control_6dc23131:31467998
idci7584:31464702
nes-ftch-new:31485413
showingstats:31481873
534a6447_copy:31478748
nes-extended-on:31455476
chat:31457767
8hig5102:31480529
ah:31461780
67jbj424:31486320
bg_compact_t:31487244
t-some:31486549
cpptoolson-v2:31475363
827if375:31477818
signintitlebar:31487064
db0gd219:31481871
po_com_t:31486091
ddid_t:31478206
getcmakediagnosticsoff:31487008

[antald]

+1

[calvintseng]

+1

[Ni-Amlam]

+1