AI agent

Type: Bug

when I forked a session to a new one and working on both sessions for different topic, but it seems they share the new discussion context and sometimes answer the question from the other session.

VS Code version: Code 1.130.0 (Universal) (1b6a188127eeaf9194f945eb6eb89a657e93c54c, 2026-07-22T14:55:04Z)
OS version: Darwin arm64 25.5.0
Modes:
Remote OS version: Linux x64 5.10.0-44-cloud-amd64

System Info

|Item|Value|
|---|---|
|CPUs|Apple M3 Max (16 x 2400)|
|GPU Status|2d_canvas: enabled
GPU0: VENDOR= 0x106b [Google Inc. (Apple)], DEVICE=0x0000 [ANGLE (Apple, ANGLE Metal Renderer: Apple M3 Max, Version 26.5.2 (Build 25F84))], DRIVER_VENDOR=Apple, DRIVER_VERSION=26.5.2 *ACTIVE*
Machine model name: Mac
Machine model version: 15.9
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: enabled_on
trees_in_viz: disabled_off
video_decode: enabled
video_encode: enabled
webgl: enabled
webgpu: enabled
webnn: disabled_off|
|Load (avg)|9, 8, 8|
|Memory (System)|64.00GB (0.87GB free)|
|Process Argv|--crash-reporter-id 928a4bac-b6fc-4089-9e13-768a7f2f824c|
|Screen Reader|no|
|VM|0%|

|Item|Value|
|---|---|
|Remote|SSH: jyang9-0610.snap-ads-debug.snapint|
|OS|Linux x64 5.10.0-44-cloud-amd64|
|CPUs|Intel(R) Xeon(R) CPU @ 2.80GHz (16 x 0)|
|Memory (System)|125.81GB (112.01GB free)|
|VM|0%|
Extensions (32)

Name|Identifier|Author|Version
---|---|---|---
GitHub Repositories|github.remotehub|GitHub|0.64.0
Jupyter Keymap|ms-toolsai.jupyter-keymap|ms-toolsai|1.1.2
Dev Containers|ms-vscode-remote.remote-containers|ms-vscode-remote|0.466.0
Remote - SSH|ms-vscode-remote.remote-ssh|ms-vscode-remote|0.124.0
Remote - SSH: Editing Configuration Files|ms-vscode-remote.remote-ssh-edit|ms-vscode-remote|0.87.0
WSL|ms-vscode-remote.remote-wsl|ms-vscode-remote|0.104.3
Remote Development|ms-vscode-remote.vscode-remote-extensionpack|ms-vscode-remote|0.26.0
Azure Repos|ms-vscode.azure-repos|ms-vscode|0.40.0
Remote Explorer|ms-vscode.remote-explorer|ms-vscode|0.5.0
Remote Repositories|ms-vscode.remote-repositories|ms-vscode|0.42.0
Remote - Tunnels|ms-vscode.remote-server|ms-vscode|1.5.3
vscode-pdf|tomoki1207.pdf|tomoki1207|1.2.2
Claude Code for VS Code|anthropic.claude-code|Anthropic|2.1.220
Any Markdown Editor|imaken.any-markdown|imaken|0.195.392
Edit CSV|janisdd.vscode-edit-csv|janisdd|0.11.9
Rainbow CSV|mechatroner.rainbow-csv|mechatroner|3.24.1
Mermaid|mermaidchart.vscode-mermaid-chart|MermaidChart|2.7.4
Python Debugger|ms-python.debugpy|ms-python|2026.6.0
Python|ms-python.python|ms-python|2026.4.0
Pylance|ms-python.vscode-pylance|ms-python|2026.3.1
Python Environments|ms-python.vscode-python-envs|ms-python|1.36.0
Jupyter|ms-toolsai.jupyter|ms-toolsai|2025.9.1
Jupyter Keymap|ms-toolsai.jupyter-keymap|ms-toolsai|1.1.2
Jupyter Notebook Renderers|ms-toolsai.jupyter-renderers|ms-toolsai|1.3.0
Jupyter Cell Tags|ms-toolsai.vscode-jupyter-cell-tags|ms-toolsai|0.1.9
Jupyter Slide Show|ms-toolsai.vscode-jupyter-slideshow|ms-toolsai|0.1.6
Live Preview|ms-vscode.live-server|ms-vscode|0.4.19
Chat Customizations Evaluations|ms-vscode.vscode-chat-customizations-evaluations|ms-vscode|1.0.8
tmux-integrated|pcassidy75.tmux-integrated|pcassidy75|0.2.0
Live Server|ritwickdey.liveserver|ritwickdey|5.7.10
IntelliCode|visualstudioexptteam.vscodeintellicode|VisualStudioExptTeam|1.3.2
GitHub Copilot modernization|vscjava.migrate-java-to-azure|vscjava|1.22.0

A/B Experiments

```
vsliv368:30146709
vswsl492cf:30256860
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
envsactivate1:31551504
cloudbuttont:31379625
3efgi100_wstrepl:31403338
ddidtcf:31399634
ec5jj548:31422691
cmp-cht-diffpatch-3in1-lysithea-0015-all-features-fix:31555681
cp_cls_t_966_ss:31526232
8hhj4413:31478653
ge8j1254_inline_auto_hint_haiku:31490510
cp_cls_t_1081:31454832
conptydll_true:31498968
e9c30283:31461165
test_treatment2:31471001
46204921:31447328
idci7584:31464702
e3e4d672:31494082
ei9d7968:31496641
nes-extended-on:31455476
chat:31457767
8hig5102:31480529
89g7j272:31518289
7e187181:31503455
i2gc6536:31499202
52612955:31516516
ghj88844:31499326
h08i8180:31475369
23c7c724:31520045
ddid_t:31478206
hmra_i5g22:31518061
bjc72774_agent_sandbox:31554070
7df3h592:31512476
cp_cls_t_1082:31535311
logging_enabled_new:31498466
db5d2638:31499441
jb_cp_cls_t_632:31543129
56dj4588:31512888
32d76977:31512328
ha629193:31508444
cdk-lw-on:31524445
f9bf7985:31543584
jh5f2457_c:31540921
g4a0e106:31529594
8hfba999:31537718
jbcp_cls_pctr_t:31531130
61138546:31518536
cp_intellij_t_nes:31548657
jf4hg949:31526829
nes-curr-leftover-1500:31538366
ahp-both-windows:31555645
h561g132:31533256
sessions_3:31532893
ihg5j128:31534457
f412h606:31551416
9gg7f176:31542112
sandbox-ui-on-2:31543161
5fe6f778:31554331
allow-none:31555437
6i51c363:31551401
nes-gb3-4k:31554347
0dg73464:31554319
d4c76da2:31554780
treatment-23-1:31555779
unuse_dynamic_mcp:31555281

```

The report provides no source files, tests, or code entry points. Start by reproducing the issue in VS Code 1.130.0 by forking an agent session and asking unrelated questions in both sessions; done means each session consistently uses only its own discussion context.

Written by the indexing model from the issue text.