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Idea: use Turso/ZeroMQ/WebSockets for shared event bus, synchronize multiple opencode TUIs and servers #1829

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opened 2026-02-16 17:32:50 -05:00 by yindo · 5 comments
yindo commented 2026-02-16 17:32:50 -05:00
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Originally created by @remorses on GitHub (Sep 25, 2025).

Originally assigned to: @thdxr on GitHub.

Currently opencode uses an in memory event notification system, this means that you cannot have 2 opencode sessions open at the same time or use opencode serve and opencode tui at the same time.

This is a problem for kimaki: if you try to write messages in Discord and also the tui the opencode chat will hang, probably because it is in a broken state, because state is not synchronized between the 2 processes

If instead opencode uses ZeroMQ for the process notification bus

  • Multiple processes could publish and subscribe to same session (you can use both tui and serve at the same time
  • If you open an opencode session in 2 multiple terminals they will both show the latest chat state https://github.com/sst/opencode/issues/2403

Unfortunately ZeroMQ does not seem to work in Bun right now so we would need to create a port form Zig bindings using ffi or NAPI

Originally created by @remorses on GitHub (Sep 25, 2025). Originally assigned to: @thdxr on GitHub. Currently opencode uses an in memory event notification system, this means that you cannot have 2 opencode sessions open at the same time or use `opencode serve` and `opencode` tui at the same time. This is a problem for [kimaki](https://kimaki.xyz): if you try to write messages in Discord and also the tui the opencode chat will hang, probably because it is in a broken state, because state is not synchronized between the 2 processes If instead opencode uses [ZeroMQ](https://zeromq.org/get-started/) for the process notification bus - Multiple processes could publish and subscribe to same session (you can use both tui and serve at the same time - If you open an opencode session in 2 multiple terminals they will both show the latest chat state https://github.com/sst/opencode/issues/2403 Unfortunately ZeroMQ does not seem to work in Bun right now so we would need to create a port form Zig bindings using ffi or NAPI
yindo commented 2026-02-16 17:32:50 -05:00
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@github-actions[bot] commented on GitHub (Sep 25, 2025):

This issue might be a duplicate of existing issues. Please check:

  • #2403: Shows the exact same problem you're describing - messages created by the SDK aren't shown in real time in the CLI when using different processes, and state synchronization issues between multiple sessions
  • #878: Feature request for connecting TUI to existing opencode serve instances (closed but directly related to multi-session support)

Feel free to ignore if none of these address your specific case.

@github-actions[bot] commented on GitHub (Sep 25, 2025): This issue might be a duplicate of existing issues. Please check: - #2403: Shows the exact same problem you're describing - messages created by the SDK aren't shown in real time in the CLI when using different processes, and state synchronization issues between multiple sessions - #878: Feature request for connecting TUI to existing `opencode serve` instances (closed but directly related to multi-session support) Feel free to ignore if none of these address your specific case.
yindo commented 2026-02-16 17:32:50 -05:00
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@taqtiqa-mark commented on GitHub (Sep 28, 2025):

this means that you cannot have 2 opencode sessions open at the same time or use opencode serve and opencode tui at the same time.

@remorses I believe that the new opencode attach <prot://host:port> resolves this?

https://github.com/sst/opencode/pull/2635#issuecomment-3301698491 see 40c206c2f9

@taqtiqa-mark commented on GitHub (Sep 28, 2025): > this means that you cannot have 2 opencode sessions open at the same time or use `opencode serve` and `opencode` tui at the same time. @remorses I believe that the new `opencode attach <prot://host:port>` resolves this? https://github.com/sst/opencode/pull/2635#issuecomment-3301698491 see 40c206c2f9999689572926a758c3661297e99a95
yindo commented 2026-02-16 17:32:50 -05:00
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@remorses commented on GitHub (Sep 29, 2025):

it's not a great DX. I don't know the port the server is listening to, i want to use /sessions command instead

Also doesn't work if i have an already open tui and want to start a server for the same project

This behavior needs to be baked in

@remorses commented on GitHub (Sep 29, 2025): it's not a great DX. I don't know the port the server is listening to, i want to use /sessions command instead Also doesn't work if i have an already open tui and want to start a server for the same project This behavior needs to be baked in
yindo commented 2026-02-16 17:32:50 -05:00
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@taqtiqa-mark commented on GitHub (Sep 29, 2025):

Some of this isn't documented, or the docs are wip:

I don't know the port the server is listening to

That is either the default port 4096, or the port you nominated with opencode serve --port 1234 --hostname 127.0.0.1
Note that opencode starts a server with default port and hostname, and connects the TUI client to that.

Also doesn't work if i have an already open tui and want to start a server for the same project.

As above, when you started the TUI, it started a server (with defaults) for you.

Test:

opencode &

# Step 3: Wait briefly for server to start (adjust sleep if needed)
sleep 5

# Step 4: Check if port 4096 is listening (using ss; install net-tools if using netstat)
ss -tuln | grep 4096  # If output shows LISTEN on :::4096 or 0.0.0.0:4096, it's running

# Alternative: Use curl to verify the API docs endpoint (should return HTML if server is up)
curl -f http://127.0.0.1:4096/doc || echo "Server not responding"

# Step 5: Clean up (stop the server and any processes)
pkill -f opencode

i want to use /sessions command instead

Maybe that can be a separate issue, given this one concerns "multiple opencode TUIs and servers)"?

@taqtiqa-mark commented on GitHub (Sep 29, 2025): Some of this isn't documented, or the docs are wip: > I don't know the port the server is listening to That is either the default port `4096`, or the port you nominated with `opencode serve --port 1234 --hostname 127.0.0.1` Note that `opencode` starts a server with default port and hostname, and connects the TUI client to that. > Also doesn't work if i have an already open tui and want to start a server for the same project. As above, when you started the TUI, it started a server (with defaults) for you. Test: ``` opencode & # Step 3: Wait briefly for server to start (adjust sleep if needed) sleep 5 # Step 4: Check if port 4096 is listening (using ss; install net-tools if using netstat) ss -tuln | grep 4096 # If output shows LISTEN on :::4096 or 0.0.0.0:4096, it's running # Alternative: Use curl to verify the API docs endpoint (should return HTML if server is up) curl -f http://127.0.0.1:4096/doc || echo "Server not responding" # Step 5: Clean up (stop the server and any processes) pkill -f opencode ``` > i want to use /sessions command instead Maybe that can be a separate issue, given this one concerns "multiple opencode TUIs and servers)"?
yindo commented 2026-02-16 17:32:50 -05:00
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@athal7 commented on GitHub (Jan 2, 2026):

Still encountering this - opening multiple TUI instances for the same directory doesn't sync the session list. Would love to see this addressed. Happy to help test any solutions.

@athal7 commented on GitHub (Jan 2, 2026): Still encountering this - opening multiple TUI instances for the same directory doesn't sync the session list. Would love to see this addressed. Happy to help test any solutions.
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Reference: anomalyco/opencode#1829
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