How to make R the default session / interpreter #12656

mvuorre · 2026-03-23T11:00:51Z

mvuorre
Mar 23, 2026

Hi all, when I open a new Positron window in an empty directory (or one containing .R and .Rmd files), Positron still defaults to firing up Python. How do I make sure that Positron never opens a Python session by default, but instead starts an R session?

I added "positron.r.interpreters.default": "/usr/local/bin/R" to my settings.json, but this only had the effect that no interpreter / session is started (even in a directory containing .R and .Rmd files). I also have "interpreters.startupBehavior": "auto", and tried "always", "recommended", and "manual", but those result in a python interpreter / session starting on startup.

Positron Version: 2026.03.0 build 212
Code - OSS Version: 1.108.0
Commit: f3aae65
Date: 2026-02-26T04:57:06.999Z
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Darwin arm64 25.3.0

jmcphers · 2026-03-23T15:07:56Z

jmcphers
Mar 23, 2026
Maintainer

There are a few known issues that cause this behavior:

#11180
#12116
#12357

Most are addressed in the daily builds. Would you be willing to reproduce in a daily build and let us know if it's still happening there?

If so, run the Runtime Startup Diagnostics command immediately after observing the unwanted Python startup and let us know what you see (it'll tell us why Python is starting up)

4 replies

mvuorre Mar 23, 2026
Author

Thanks! I updated to the latest daily, and issue persists.

Positron Version: 2026.04.0 build 202
Code - OSS Version: 1.109.2
Commit: a5e20e1
Date: 2026-03-23T07:49:36.232Z
Electron: 39.3.0
Chromium: 142.0.7444.265
Node.js: 22.21.1
V8: 14.2.231.22-electron.0
OS: Darwin arm64 25.3.0

I create a "New folder from template", choose R, this works: directory opens and an R console fires up.

I open a directory with random .R and .Rmd files (no project files), no console boots up but instead I see "There is no session running. Use Start Session to start one."

I open a Quarto project directory, and both R and Python consoles boot up, and Python becomes active. Here's the runtime startup diagnostics:

# Positron Runtime Startup Diagnostics


## System Information

* Positron: 2026.04.0 build 202 (Code OSS 1.109.2)
* Commit: a5e20e179301ed1fbccd1691527c015000c95d10
* OS: darwin(25.3.0)
* CPUs: Apple M1 Max(10 x 2400)
* Memory(System): 32.00 GB (1.65GB free)
* Initial Startup: false

## Workspace-Affiliated Runtimes

| Name                  | Language | Version | Source | Has Session | Session ID(s)   |
| --------------------- | -------- | ------- | ------ | ----------- | --------------- |
| R 4.5.3               | r        | 4.5.3   | System | Yes         | r-d4ac2bb8      |
| Python 3.9.6 (System) | python   | 3.9.6   | System | Yes         | python-c881564e |

## Active Sessions

| Runtime               | Name                  | Mode    | State | Start Reason                            | Created    |
| --------------------- | --------------------- | ------- | ----- | --------------------------------------- | ---------- |
| R 4.5.3               | R 4.5.3               | console | idle  | Affiliated R runtime for workspace      | 4:56:13 PM |
| Python 3.9.6 (System) | Python 3.9.6 (System) | console | idle  | Affiliated Python runtime for workspace | 4:56:13 PM |

## Time to First Runtime Ready

* First runtime ready: 2692ms after runtime startup began

## Startup Phase Progression

* Current Phase: Complete

| Phase         | Timestamp (ms) | Duration (ms) |
| ------------- | -------------- | ------------- |
| initializing  | 1774281371908  | -             |
| awaitingTrust | 1774281371908  | 0             |
| starting      | 1774281372131  | 223           |
| discovering   | 1774281374596  | 2465          |
| complete      | 1774281375506  | 910           |

## Positron Runtime Performance Marks

| Name                                                                         | Timestamp     | Delta | Total |
| ---------------------------------------------------------------------------- | ------------- | ----- | ----- |
| code/positron/runtimeStartupBegin                                            | 1774281371907 | 0     | 0     |
| code/positron/runtimeStartupPhase/initializing                               | 1774281371908 | 1     | 1     |
| code/positron/runtimeStartupPhase/awaitingTrust                              | 1774281371908 | 0     | 1     |
| code/positron/runtimeStartupPhase/starting                                   | 1774281372131 | 223   | 224   |
| code/positron/positron.positron-supervisor/initializing                      | 1774281373175 | 1044  | 1268  |
| code/positron/positron.positron-supervisor/terminalOpened                    | 1774281373177 | 2     | 1270  |
| code/positron/runtimeStartup/extensionActivated/positron.positron-r          | 1774281373328 | 151   | 1421  |
| code/positron/runtimeStartup/extensionActivated/positron.positron-r          | 1774281373329 | 1     | 1422  |
| code/positron/positron.positron-supervisor/started                           | 1774281373329 | 0     | 1422  |
| code/positron/runtimeStartup/extensionActivated/ms-python.python             | 1774281373358 | 29    | 1451  |
| code/positron/runtimeStartup/extensionActivated/ms-python.python             | 1774281373358 | 0     | 1451  |
| code/positron/runtimeStartup/extensionActivated/positron.positron-reticulate | 1774281373362 | 4     | 1455  |
| code/positron/runtimeSessionWillStart/r-d4ac2bb8                             | 1774281373389 | 27    | 1482  |
| code/positron/runtimeSessionWillStart/python-c881564e                        | 1774281373732 | 343   | 1825  |
| code/positron/positron.positron-supervisor/ready                             | 1774281373759 | 27    | 1852  |
| code/positron/runtimeStartupPhase/discovering                                | 1774281374596 | 837   | 2689  |
| code/positron/runtimeSessionStart/r-d4ac2bb8                                 | 1774281374599 | 3     | 2692  |
| code/positron/firstRuntimeReady                                              | 1774281374599 | 0     | 2692  |
| code/positron/runtimeStartupPhase/complete                                   | 1774281375506 | 907   | 3599  |
| code/positron/runtimeSessionStart/python-c881564e                            | 1774281375920 | 414   | 4013  |

## Individual Session Startup Times

| Runtime               | Session ID      | Start Time (ms) |
| --------------------- | --------------- | --------------- |
| R 4.5.3               | r-d4ac2bb8...   | 2692            |
| Python 3.9.6 (System) | python-c8815... | 4013            |

## Interpreter Settings

### Startup Behavior

* `interpreters.startupBehavior`: auto
* `interpreters.restartOnCrash`: true

### Python

* `python.defaultInterpreterPath`: /opt/homebrew/bin/python3
* `python.interpreters.include`: []
* `python.interpreters.exclude`: []
* `python.interpreters.override`: []
* `python.environmentProviders.enable`: {"Venv":true,"Conda":true,"uv":true}
* `python.locator`: native

### R

* `positron.r.interpreters.default`: /usr/local/bin/R
* `positron.r.customBinaries`: []
* `positron.r.customRootFolders`: []
* `positron.r.interpreters.exclude`: []
* `positron.r.interpreters.override`: []
* `positron.r.interpreters.condaDiscovery`: false
* `positron.r.interpreters.pixiDiscovery`: false


## Session Launch Parameters

### R 4.5.3

* **argv**: `/Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/ark/ark --connection_file {connection_file} --log {log_file} --startup-file /Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/scripts/startup.R --session-mode console -- --interactive --no-restore-data --no-save --quiet`
* **Protocol version**: 5.5
* **Environment variables** (4):

| Variable          | Value                                         |
| ----------------- | --------------------------------------------- |
| DYLD_LIBRARY_PATH | /Library/Frameworks/R.framework/Resources/lib |
| RUST_BACKTRACE    | 1                                             |
| RUST_LOG          | warn,ark=warn                                 |
| R_HOME            | /Library/Frameworks/R.framework/Resources     |

### Python 3.9.6 (System)

* **argv**: `/usr/bin/python3 /Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/posit/positron_language_server.py -f {connection_file} --logfile {log_file} --loglevel=error --session-mode=console`
* **Protocol version**: 5.3
* **Interrupt mode**: message
* **Environment variables** (43):

| Variable                            | Value                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| ----------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| APPLICATION_INSIGHTS_NO_STATSBEAT   | true                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| COMMAND_MODE                        | unix2003                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| DEBUG                               | release                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| DISPLAY                             | /private/tmp/com.apple.launchd.sQ1VgInwmm/org.xquartz:0                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| ELECTRON_RUN_AS_NODE                | 1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| HOME                                | /Users/matti                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| HOMEBREW_CELLAR                     | /opt/homebrew/Cellar                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| HOMEBREW_PREFIX                     | /opt/homebrew                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| HOMEBREW_REPOSITORY                 | /opt/homebrew                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| INFOPATH                            | /opt/homebrew/share/info:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| LANG                                | C.UTF-8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| LOGNAME                             | matti                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| MallocNanoZone                      | 0                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| OLDPWD                              | /                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| OSLogRateLimit                      | 64                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| PATH                                | /opt/zerobrew/prefix/bin:/Users/matti/.cargo/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/opt/pmk/env/global/bin:/opt/X11/bin:/Applications/Wireshark.app/Contents/MacOS:/Applications/VMware Fusion.app/Contents/Public:/usr/local/sbin:/Applications/quarto/bin:/Users/matti/.local/bin:/Applications/Docker.app/Contents/Resources/bin/:/Users/matti/.lmstudio/bin |
| PLOTLY_RENDERER                     | browser                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| PWD                                 | /                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| PYDEVD_IPYTHON_COMPATIBLE_DEBUGGING | 1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| PYTHONPATH                          | /Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/lib/ipykernel/universal2/cp39:/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/lib/ipykernel/arm64/cp3:/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/lib/ipykernel/py3                                                                                                                                                                                                                                                                                                                         |
| PYTHONPYCACHEPREFIX                 | /Users/matti/Library/Application Support/Positron/User/globalStorage/ms-python.python/pycache                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| SHELL                               | /bin/zsh                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| SHLVL                               | 0                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| SSH_AUTH_SOCK                       | /private/tmp/com.apple.launchd.oIHQz9t59o/Listeners                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| STARSHIP_SESSION_KEY                | ***                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| STARSHIP_SHELL                      | zsh                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| TMPDIR                              | /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| USER                                | matti                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| VSCODE_CODE_CACHE_PATH              | /Users/matti/Library/Application Support/Positron/CachedData/a5e20e179301ed1fbccd1691527c015000c95d10                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| VSCODE_CRASH_REPORTER_PROCESS_TYPE  | extensionHost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| VSCODE_CWD                          | /                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| VSCODE_ESM_ENTRYPOINT               | vs/workbench/api/node/extensionHostProcess                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| VSCODE_HANDLES_UNCAUGHT_ERRORS      | true                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| VSCODE_IPC_HOOK                     | /Users/matti/Library/Application Support/Positron/1.10-main.sock                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| VSCODE_NLS_CONFIG                   | {"userLocale":"en-us","osLocale":"en-us","resolvedLanguage":"en","defaultMessagesFile":"/Applications/Positron.app/Contents/Resources/app/out/nls.messages.json","locale":"en-us","availableLanguages":{}}                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| VSCODE_PID                          | 83429                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| XPC_FLAGS                           | 0x0                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| XPC_SERVICE_NAME                    | application.co.posit.positron.140920937.140920942                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| ZEROBREW_BIN                        | /Users/matti/.local/bin                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| ZEROBREW_DIR                        | /Users/matti/.zerobrew                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| _                                   | /Applications/Positron.app/Contents/MacOS/Electron                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| __CFBundleIdentifier                | co.posit.positron                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| __CF_USER_TEXT_ENCODING             | 0x1F5:0:0                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |


## Discovered Runtimes

| Extension           | Name                    | Path                                                               |
| ------------------- | ----------------------- | ------------------------------------------------------------------ |
| positron.positron-r | R 4.5.3                 | /Library/Frameworks/R.framework/Versions/4.5-arm64/Resources/bin/R |
| ms-python.python    | Python 3.9.6 (System)   | /usr/bin/python3                                                   |
| positron.positron-r | R 4.5.3                 | /usr/local/bin/R                                                   |
| ms-python.python    | Python 3.14.3 (System)  | /opt/homebrew/bin/python3                                          |
| ms-python.python    | Python 3.12.13 (System) | /opt/homebrew/bin/python3.12                                       |
| ms-python.python    | Python 3.10.20 (System) | /opt/homebrew/bin/python3.10                                       |
| positron.positron-r | R 4.3.3                 | /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/bin/R |
| ms-python.python    | Python 3.13.12 (System) | /opt/homebrew/bin/python3.13                                       |
| ms-python.python    | Python 3.9.25 (System)  | /opt/homebrew/bin/python3.9                                        |

## Output Channels

### Kernel Supervisor

* Showing last 50 of 1039 lines

```
15:56:15 [INFO] [client python-c881564e-1] Got message 6240b9ea8f of type comm_info_request; sending to Jupyter socket Shell
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'Shell' to WebSocket: execute_reply
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (execute_request)
15:56:15 [INFO] [client python-c881564e-1] Got message cb13c3ab of type comm_msg; sending to Jupyter socket Shell
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'idle' => 'busy' (comm_open)
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: comm_msg
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (comm_open)
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'idle' => 'busy' (comm_open)
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: comm_msg
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (comm_open)
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'idle' => 'busy' (comm_info_request)
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (comm_info_request)
15:56:15 [DEBUG] (5) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'Shell' to WebSocket: comm_info_reply
15:56:15 [DEBUG] (10) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (10) kcserver::kernel_state: [session python-c881564e] status 'idle' => 'busy' (comm_info_request)
15:56:15 [DEBUG] (10) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (10) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (comm_info_request)
15:56:15 [DEBUG] (10) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'Shell' to WebSocket: comm_info_reply
15:56:15 [INFO] [client python-c881564e-1] Got message db50e2d97d of type comm_open; sending to Jupyter socket Shell
15:56:15 [DEBUG] (5) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (5) kcserver::kernel_state: [session python-c881564e] status 'idle' => 'busy' (comm_info_request)
15:56:15 [DEBUG] (5) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (5) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (comm_info_request)
15:56:15 [DEBUG] (10) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'Shell' to WebSocket: comm_info_reply
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'idle' => 'busy' (comm_msg)
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: comm_msg
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (comm_msg)
15:56:15 [DEBUG] (10) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (10) kcserver::kernel_state: [session python-c881564e] status 'idle' => 'busy' (comm_open)
15:56:15 [DEBUG] (8) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:15 [DEBUG] (8) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (comm_open)
15:56:16 [INFO] get_session("python-c881564e") - X-Span-ID: "cbb61c66-ac23-450f-b8ed-111dfc672a8d"
15:56:16 [INFO] [client python-c881564e-1] Got message 61ac50848b of type comm_open; sending to Jupyter socket Shell
15:56:16 [DEBUG] (10) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:16 [DEBUG] (10) kcserver::kernel_state: [session python-c881564e] status 'idle' => 'busy' (comm_open)
15:56:16 [DEBUG] (10) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: status
15:56:16 [DEBUG] (10) kcserver::kernel_state: [session python-c881564e] status 'busy' => 'idle' (comm_open)
15:56:16 [DEBUG] (10) kcserver::zmq_ws_proxy: [session python-c881564e] Forward from 'IOPub' to WebSocket: comm_msg
15:56:20 [DEBUG] (5) kcserver::server: Unix socket connection ended (/var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kc-5996.sock): error shutting down connection
15:56:21 [DEBUG] (8) kcserver::server: Unix socket connection ended (/var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kc-5996.sock): error shutting down connection

```

### Python Language Pack

* Showing last 50 of 879 lines

```
2026-03-23 16:56:14.639 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:14.746 [info] Native locator: Refresh finished in 149 ms
2026-03-23 16:56:14.746 [info] pythonRuntimeDiscoverer: discovered 6 Python interpreters
2026-03-23 16:56:14.746 [info] pythonRuntimeDiscoverer: filtering interpreters
2026-03-23 16:56:14.746 [info] pythonRuntimeDiscoverer: 6 Python interpreters remain after filtering
2026-03-23 16:56:14.746 [info] pythonRuntimeDiscoverer: sorting interpreters
2026-03-23 16:56:14.750 [info] createPythonRuntime: getting service instances
2026-03-23 16:56:14.750 [info] createPythonRuntime: getting extension runtime settings
2026-03-23 16:56:14.751 [info] > "/opt/homebrew/bin/python3.13" "/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/interpreterInfo.py"
2026-03-23 16:56:14.765 [info] createPythonRuntime: getting service instances
2026-03-23 16:56:14.765 [info] createPythonRuntime: getting extension runtime settings
2026-03-23 16:56:14.765 [info] > "/opt/homebrew/bin/python3.9" "/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/interpreterInfo.py"
2026-03-23 16:56:14.771 [info] pythonRuntimeDiscoverer: recommended for workspace: false
2026-03-23 16:56:14.771 [info] createPythonRuntime: getting service instances
2026-03-23 16:56:14.772 [info] createPythonRuntime: getting extension runtime settings
2026-03-23 16:56:14.772 [info] > "/opt/homebrew/bin/python3" "/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/interpreterInfo.py"
2026-03-23 16:56:14.791 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:14.804 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:14.804 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:14.804 [info] pythonRuntimeDiscoverer: registering runtime for interpreter /opt/homebrew/bin/python3 with id 5dea84f13ebc22cdf205c3278cba8908
2026-03-23 16:56:14.805 [info] createPythonRuntime: getting service instances
2026-03-23 16:56:14.805 [info] createPythonRuntime: getting extension runtime settings
2026-03-23 16:56:14.806 [info] > "/opt/homebrew/bin/python3.13" "/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/interpreterInfo.py"
2026-03-23 16:56:14.837 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:14.837 [info] pythonRuntimeDiscoverer: registering runtime for interpreter /opt/homebrew/bin/python3.13 with id 12dc8260efae553c7423d64ee3ef5952
2026-03-23 16:56:14.837 [info] createPythonRuntime: getting service instances
2026-03-23 16:56:14.837 [info] createPythonRuntime: getting extension runtime settings
2026-03-23 16:56:14.838 [info] > "/opt/homebrew/bin/python3.12" "/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/interpreterInfo.py"
2026-03-23 16:56:14.866 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:14.870 [info] pythonRuntimeDiscoverer: registering runtime for interpreter /opt/homebrew/bin/python3.12 with id 72529beabfded75ff74c9923ce5bd5ef
2026-03-23 16:56:14.870 [info] createPythonRuntime: getting service instances
2026-03-23 16:56:14.870 [info] createPythonRuntime: getting extension runtime settings
2026-03-23 16:56:14.871 [info] > "/opt/homebrew/bin/python3.10" "/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/interpreterInfo.py"
2026-03-23 16:56:14.903 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:14.903 [info] pythonRuntimeDiscoverer: registering runtime for interpreter /opt/homebrew/bin/python3.10 with id 7215313173ab6b3b6a45c05707b81b92
2026-03-23 16:56:14.903 [info] createPythonRuntime: getting service instances
2026-03-23 16:56:14.903 [info] createPythonRuntime: getting extension runtime settings
2026-03-23 16:56:14.904 [info] > "/opt/homebrew/bin/python3.9" "/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/interpreterInfo.py"
2026-03-23 16:56:14.936 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:14.936 [info] pythonRuntimeDiscoverer: registering runtime for interpreter /opt/homebrew/bin/python3.9 with id a638b63ef883ee6d7895bae5335851f7
2026-03-23 16:56:14.937 [info] createPythonRuntime: getting service instances
2026-03-23 16:56:14.937 [info] createPythonRuntime: getting extension runtime settings
2026-03-23 16:56:14.937 [info] > "/usr/bin/python3" "/Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/interpreterInfo.py"
2026-03-23 16:56:15.505 [info] createPythonRuntime: startup behavior: implicit
2026-03-23 16:56:15.505 [info] pythonRuntimeDiscoverer: registering runtime for interpreter /usr/bin/python3 with id 6deafd5c83cc5146b074644fdc466298
2026-03-23 16:56:16.932 [info] Creating Python 3.9.6 language client (port 49643)
2026-03-23 16:56:16.932 [info] Python (3.9.6) language client state changed uninitialized => starting
2026-03-23 16:56:16.965 [info] Python (3.9.6) language client init successful
2026-03-23 16:56:16.965 [info] Python (3.9.6) language client state changed starting => running

```

### Python Kernel

* Showing last 50 of 67 lines

```

To connect another client to this kernel, use:

    --existing /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/connection_python-18b9fa5d.json

2026-03-23 16:52:43.648 [info] python-d018720b ** Begin kernel log for session Python 3.9.6 (System) (python-d018720b) at 3/23/2026, 4:52:43 PM **
2026-03-23 16:52:43.648 [info] python-d018720b Streaming kernel log file: /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-Q1g89k/kernel.log
NOTE: When using the `ipython kernel` entry point, Ctrl-C will not work.



To exit, you will have to explicitly quit this process, by either sending

"quit" from a client, or using Ctrl-\ in UNIX-like environments.



To read more about this, see https://github.com/ipython/ipython/issues/2049





To connect another client to this kernel, use:

    --existing /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/connection_python-d018720b.json

2026-03-23 16:56:14.487 [info] python-c881564e ** Begin kernel log for session Python 3.9.6 (System) (python-c881564e) at 3/23/2026, 4:56:14 PM **
2026-03-23 16:56:14.487 [info] python-c881564e Streaming kernel log file: /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-S6q1QE/kernel.log
NOTE: When using the `ipython kernel` entry point, Ctrl-C will not work.



To exit, you will have to explicitly quit this process, by either sending

"quit" from a client, or using Ctrl-\ in UNIX-like environments.



To read more about this, see https://github.com/ipython/ipython/issues/2049





To connect another client to this kernel, use:

    --existing /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/connection_python-c881564e.json


```

### Python Supervisor

```
2026-03-23 16:51:45.930 [info] python-18b9fa5d Session Python 3.9.6 (System) (python-18b9fa5d) created in /Users/matti/Documents/website with command:
2026-03-23 16:51:45.930 [info] python-18b9fa5d /usr/bin/python3 /Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/posit/positron_language_server.py -f {connection_file} --logfile /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-Rwy95C/kernel.log --loglevel=error --session-mode=console
2026-03-23 16:51:45.930 [info] python-18b9fa5d Session python-18b9fa5d established after 0ms
2026-03-23 16:51:49.399 [info] python-18b9fa5d Connecting to session WebSocket via ws+unix:///var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kc-92643.python-1.sock:/api/channels/python-18b9fa5d
2026-03-23 16:51:49.399 [info] python-18b9fa5d Connected to session after 2ms
2026-03-23 16:51:49.399 [info] python-18b9fa5d Kernel is ready.
2026-03-23 16:51:49.400 [info] python-18b9fa5d Set initial console width to 160
2026-03-23 16:51:50.408 [info] python-18b9fa5d Starting Positron LSP server
2026-03-23 16:51:50.409 [info] python-18b9fa5d Starting LSP server positron-lsp-python-56b81382 for 127.0.0.1
2026-03-23 16:51:50.418 [info] python-18b9fa5d Starting Positron LSP client on port 49259
2026-03-23 16:51:55.711 [info] python-18b9fa5d Websocket closed with kernel in status idle: {}
2026-03-23 16:52:43.648 [info] python-d018720b Session Python 3.9.6 (System) (python-d018720b) created in /Users/matti/Documents/website with command:
2026-03-23 16:52:43.648 [info] python-d018720b /usr/bin/python3 /Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/posit/positron_language_server.py -f {connection_file} --logfile /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-Q1g89k/kernel.log --loglevel=error --session-mode=console
2026-03-23 16:52:43.648 [info] python-d018720b Session python-d018720b established after 0ms
2026-03-23 16:52:45.146 [info] python-d018720b Connecting to session WebSocket via ws+unix:///var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kc-97458.python-d.sock:/api/channels/python-d018720b
2026-03-23 16:52:45.147 [info] python-d018720b Connected to session after 1ms
2026-03-23 16:52:45.147 [info] python-d018720b Kernel is ready.
2026-03-23 16:52:45.147 [info] python-d018720b Set initial console width to 160
2026-03-23 16:52:46.160 [info] python-d018720b Starting Positron LSP server
2026-03-23 16:52:46.160 [info] python-d018720b Starting LSP server positron-lsp-python-3305ee38 for 127.0.0.1
2026-03-23 16:52:46.167 [info] python-d018720b Starting Positron LSP client on port 49362
2026-03-23 16:54:03.840 [info] python-d018720b Websocket closed with kernel in status idle: {}
2026-03-23 16:56:14.487 [info] python-c881564e Session Python 3.9.6 (System) (python-c881564e) created in /Users/matti/Documents/website with command:
2026-03-23 16:56:14.487 [info] python-c881564e /usr/bin/python3 /Applications/Positron.app/Contents/Resources/app/extensions/positron-python/python_files/posit/positron_language_server.py -f {connection_file} --logfile /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-S6q1QE/kernel.log --loglevel=error --session-mode=console
2026-03-23 16:56:14.487 [info] python-c881564e Session python-c881564e established after 0ms
2026-03-23 16:56:15.914 [info] python-c881564e Connecting to session WebSocket via ws+unix:///var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kc-5996.python-c.sock:/api/channels/python-c881564e
2026-03-23 16:56:15.915 [info] python-c881564e Connected to session after 2ms
2026-03-23 16:56:15.915 [info] python-c881564e Kernel is ready.
2026-03-23 16:56:15.915 [info] python-c881564e Set initial console width to 85
2026-03-23 16:56:16.926 [info] python-c881564e Starting Positron LSP server
2026-03-23 16:56:16.926 [info] python-c881564e Starting LSP server positron-lsp-python-f8b923d1 for 127.0.0.1
2026-03-23 16:56:16.932 [info] python-c881564e Starting Positron LSP client on port 49643

```

### R Language Pack

* Showing last 50 of 1300 lines

```
    "includePrerelease": false,
    "raw": "4.5.3",
    "major": 4,
    "minor": 5,
    "patch": 3,
    "prerelease": [],
    "build": [],
    "version": "4.5.3"
  },
  "version": "4.5.3",
  "arch": "arm64",
  "current": true,
  "orthogonal": false,
  "default": false
}
2026-03-23 16:56:14.598 [info] Candidate R binary at /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/bin/R
2026-03-23 16:56:14.598 [info] Default R interpreter path specified in 'positron.r.interpreters.default': /usr/local/bin/R
2026-03-23 16:56:14.598 [info] R installation discovered: {
  "usable": true,
  "supported": true,
  "reasonDiscovered": [
    "Found in the primary location for R versions on this operating system"
  ],
  "reasonRejected": null,
  "binpath": "/Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/bin/R",
  "homepath": "/Library/Frameworks/R.framework/Versions/4.3-arm64/Resources",
  "semVersion": {
    "options": {},
    "loose": false,
    "includePrerelease": false,
    "raw": "4.3.3",
    "major": 4,
    "minor": 3,
    "patch": 3,
    "prerelease": [],
    "build": [],
    "version": "4.3.3"
  },
  "version": "4.3.3",
  "arch": "arm64",
  "current": false,
  "orthogonal": true,
  "default": false
}
2026-03-23 16:56:14.605 [info] Starting DAP loop
2026-03-23 16:56:15.610 [info] Creating language client R 4.5.3 for session r-d4ac2bb8 on port 49626
2026-03-23 16:56:15.610 [info] Ark (R 4.5.3 language client) for session R 4.5.3 - 'r-d4ac2bb8' state changed uninitialized => starting
2026-03-23 16:56:15.654 [info] Ark (R 4.5.3 language client) for session R 4.5.3 - 'r-d4ac2bb8' init successful
2026-03-23 16:56:15.654 [info] Ark (R 4.5.3 language client) for session R 4.5.3 - 'r-d4ac2bb8' state changed starting => running

```

### R Kernel

```
2026-03-23 16:51:45.594 [info] r-894f2128 ** Begin kernel log for session R 4.5.3 (r-894f2128) at 3/23/2026, 4:51:45 PM **
r-894f2128 Streaming kernel log file: /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-AUEXZJ/kernel.log
2026-03-23 16:52:43.375 [info] r-82497b65 ** Begin kernel log for session R 4.5.3 (r-82497b65) at 3/23/2026, 4:52:42 PM **
r-82497b65 Streaming kernel log file: /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-pNGMa0/kernel.log
2026-03-23 16:54:06.446 [info] r-ab380f1d ** Begin kernel log for session R 4.5.3 (r-ab380f1d) at 3/23/2026, 4:54:06 PM **
r-ab380f1d Streaming kernel log file: /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-9FhYix/kernel.log
2026-03-23 16:55:55.942 [info] r-25d433a8 ** Begin kernel log for session R 4.5.3 (r-25d433a8) at 3/23/2026, 4:55:55 PM **
2026-03-23 16:55:55.942 [info] r-25d433a8 Streaming kernel log file: /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-EXXTQZ/kernel.log
2026-03-23 16:56:14.246 [info] r-d4ac2bb8 ** Begin kernel log for session R 4.5.3 (r-d4ac2bb8) at 3/23/2026, 4:56:13 PM **
r-d4ac2bb8 Streaming kernel log file: /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-KPFUck/kernel.log

```

### R Supervisor

* Showing last 50 of 85 lines

```
2026-03-23 16:53:19.651 [info] r-82497b65 Set console width from 63 to 60
2026-03-23 16:54:03.840 [info] r-82497b65 Websocket closed with kernel in status idle: {}
2026-03-23 16:54:06.446 [info] r-ab380f1d Session R 4.5.3 (r-ab380f1d) created in /Users/matti/Documents/reprex/my-r-project with command:
2026-03-23 16:54:06.446 [info] r-ab380f1d /Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/ark/ark --connection_file {connection_file} --log /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-9FhYix/kernel.log --startup-file /Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/scripts/startup.R --session-mode console -- --interactive --no-restore-data --no-save --quiet
2026-03-23 16:54:06.446 [info] r-ab380f1d Session r-ab380f1d established after 0ms
2026-03-23 16:54:06.832 [info] r-ab380f1d Connecting to session WebSocket via ws+unix:///var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kc-326.r-ab380f.sock:/api/channels/r-ab380f1d
2026-03-23 16:54:06.833 [info] r-ab380f1d Connected to session after 3ms
2026-03-23 16:54:06.833 [info] r-ab380f1d Kernel is ready.
2026-03-23 16:54:06.833 [info] r-ab380f1d Starting server comm 'ark_dap' for 127.0.0.1
2026-03-23 16:54:06.833 [info] r-ab380f1d Set initial console width to 107
2026-03-23 16:54:06.835 [info] r-ab380f1d Started server comm 'ark_dap' for 127.0.0.1 on port 49447
2026-03-23 16:54:06.835 [info] r-ab380f1d Starting debug session for DAP server extension-comm-ark_dap-r-6f9e7a3d
2026-03-23 16:54:06.949 [info] r-ab380f1d Set console width from 107 to 107
2026-03-23 16:54:07.841 [info] r-ab380f1d Starting LSP
2026-03-23 16:54:07.841 [info] r-ab380f1d Starting LSP server positron-lsp-r-3f673bc8 for 127.0.0.1
2026-03-23 16:54:07.842 [info] r-ab380f1d Connecting to DAP server on port 49447
2026-03-23 16:54:07.846 [info] r-ab380f1d Starting Positron LSP client on port 49450
2026-03-23 16:54:52.953 [info] r-ab380f1d Websocket closed with kernel in status idle: {}
2026-03-23 16:55:55.939 [info] r-25d433a8 Session R 4.5.3 (r-25d433a8) created in /Users/matti/Documents/reprex/my-r-project with command:
2026-03-23 16:55:55.942 [info] r-25d433a8 /Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/ark/ark --connection_file {connection_file} --log /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-EXXTQZ/kernel.log --startup-file /Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/scripts/startup.R --session-mode console -- --interactive --no-restore-data --no-save --quiet
2026-03-23 16:55:55.942 [info] r-25d433a8 Session r-25d433a8 established after 0ms
2026-03-23 16:55:56.351 [info] r-25d433a8 Connecting to session WebSocket via ws+unix:///var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kc-3270.r-25d433.sock:/api/channels/r-25d433a8
2026-03-23 16:55:56.516 [info] r-25d433a8 Connected to session after 247ms
2026-03-23 16:55:56.516 [info] r-25d433a8 Kernel is ready.
2026-03-23 16:55:56.516 [info] r-25d433a8 Starting server comm 'ark_dap' for 127.0.0.1
2026-03-23 16:55:56.519 [info] r-25d433a8 Started server comm 'ark_dap' for 127.0.0.1 on port 49564
2026-03-23 16:55:56.519 [info] r-25d433a8 Starting debug session for DAP server extension-comm-ark_dap-r-7e334abd
2026-03-23 16:55:56.520 [info] r-25d433a8 Set initial console width to 107
2026-03-23 16:55:56.524 [info] r-25d433a8 Set console width from 80 to 107
2026-03-23 16:55:57.524 [info] r-25d433a8 Starting LSP
2026-03-23 16:55:57.524 [info] r-25d433a8 Starting LSP server positron-lsp-r-5761122 for 127.0.0.1
2026-03-23 16:55:57.524 [info] r-25d433a8 Connecting to DAP server on port 49564
2026-03-23 16:55:57.529 [info] r-25d433a8 Starting Positron LSP client on port 49569
2026-03-23 16:56:11.647 [info] r-25d433a8 Websocket closed with kernel in status idle: {}
2026-03-23 16:56:14.246 [info] r-d4ac2bb8 Session R 4.5.3 (r-d4ac2bb8) created in /Users/matti/Documents/website with command:
2026-03-23 16:56:14.246 [info] r-d4ac2bb8 /Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/ark/ark --connection_file {connection_file} --log /var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kernel-KPFUck/kernel.log --startup-file /Applications/Positron.app/Contents/Resources/app/extensions/positron-r/resources/scripts/startup.R --session-mode console -- --interactive --no-restore-data --no-save --quiet
2026-03-23 16:56:14.246 [info] r-d4ac2bb8 Session r-d4ac2bb8 established after 0ms
2026-03-23 16:56:14.593 [info] r-d4ac2bb8 Connecting to session WebSocket via ws+unix:///var/folders/61/3jd6ptzd4qjb3_rp5490gcdr0000gn/T/kc-5996.r-d4ac2b.sock:/api/channels/r-d4ac2bb8
2026-03-23 16:56:14.595 [info] r-d4ac2bb8 Connected to session after 4ms
2026-03-23 16:56:14.595 [info] r-d4ac2bb8 Kernel is ready.
2026-03-23 16:56:14.595 [info] r-d4ac2bb8 Starting server comm 'ark_dap' for 127.0.0.1
2026-03-23 16:56:14.598 [info] r-d4ac2bb8 Set initial console width to 85
2026-03-23 16:56:14.605 [info] r-d4ac2bb8 Started server comm 'ark_dap' for 127.0.0.1 on port 49617
2026-03-23 16:56:14.605 [info] r-d4ac2bb8 Starting debug session for DAP server extension-comm-ark_dap-r-5d650d15
2026-03-23 16:56:14.629 [info] r-d4ac2bb8 Set console width from 80 to 85
2026-03-23 16:56:15.606 [info] r-d4ac2bb8 Starting LSP
2026-03-23 16:56:15.606 [info] r-d4ac2bb8 Starting LSP server positron-lsp-r-85e889a8 for 127.0.0.1
2026-03-23 16:56:15.606 [info] r-d4ac2bb8 Connecting to DAP server on port 49617
2026-03-23 16:56:15.610 [info] r-d4ac2bb8 Starting Positron LSP client on port 49626

```

I also wonder why Python is "suggested" always?

mvuorre Mar 23, 2026
Author

I looked into this a bit more. I have two very similar Quarto projects, one is a big website, other a simple manuscript, the former opens up Python and R consoles, the latter only R. I cannot see any relevant differences between projects (I created .Rproj, .Renviron, .Rprofile files in both). Mysterious.

juliasilge Mar 23, 2026
Maintainer

From those diagnostics, it looks you have an "affiliated" Python runtime for this workspace, which means that Python has gotten signaled that it belongs to that workspace. You might try running the command Interpreter: Clear Saved Interpreter from the command palette and breaking the workspace affiliation for the one you see continuing to start.

mvuorre Mar 24, 2026
Author

Thanks @juliasilge, while I was trying to do this I closed the Python console and accidentally restarted positron before clearing the saved interpreter. Upon reopening Python does not start up anymore. So the problem seems solved for this particular directory, although I don't know why.

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How to make R the default session / interpreter #12656

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mvuorre Mar 23, 2026

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jmcphers Mar 23, 2026 Maintainer

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mvuorre Mar 23, 2026 Author

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mvuorre Mar 23, 2026 Author

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juliasilge Mar 23, 2026 Maintainer

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mvuorre Mar 24, 2026 Author

mvuorre
Mar 23, 2026

Replies: 1 comment 4 replies

jmcphers
Mar 23, 2026
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mvuorre Mar 23, 2026
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mvuorre Mar 23, 2026
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juliasilge Mar 23, 2026
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mvuorre Mar 24, 2026
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