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Fix xeus-octave kernel startup#80

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rgbkrk merged 1 commit into
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quill/add-xeus-octave
Mar 31, 2026
Merged

Fix xeus-octave kernel startup#80
rgbkrk merged 1 commit into
mainfrom
quill/add-xeus-octave

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@rgbkrk rgbkrk commented Mar 31, 2026 •
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Summary

  • Set OCTAVE_HOME and OCTAVE_EXEC_PREFIX env vars in CI so xeus-octave can find Octave's built-in .m scripts (the root cause was graphics_toolkit not being found, causing the kernel to crash with SIGABRT)
  • Increase per-test timeout to 30s for xeus-octave in CI (Octave runtime is slow to initialize)
  • Detect kernel process crash before attempting ZMQ connections, with stderr capture for diagnostics
  • Retry kernel_info_request up to 3 times with 2s delays for slow-starting kernels
  • Increase initial kernel startup delay from 500ms to 2s

Results

xeus-octave now starts and passes conformance tests (15-23/27 depending on run, some flakiness in interactive tests). Previously it crashed immediately with:

terminate called after throwing an instance of 'octave::execution_exception'
  what():  feval: function 'graphics_toolkit' not found

Test plan

  • xeus-octave CI job starts kernel successfully
  • xeus-octave passes Tier 1 basic protocol tests
  • All other kernel jobs remain unaffected

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github-actions Bot commented Mar 31, 2026

Kernel Conformance Matrix

Kernel Protocol Tier 1 Tier 2 Tier 3 Tier 4 Total
almond 5.4 6/11 4/7 1/4 1/5 12/27
ark 5.4 11/11 7/7 3/4 5/5 26/27
async-kernel 5.5 11/11 7/7 4/4 5/5 27/27
deno 5.3 10/11 7/7 4/4 5/5 26/27
evcxr 5.3 10/11 3/7 2/4 3/5 18/27
gonb 5.4 6/11 1/7 1/4 3/5 11/27
ijulia 5.4 10/11 6/7 3/4 5/5 24/27
ipykernel 5.3 11/11 7/7 4/4 5/5 27/27
ocaml-jupyter 5.2 9/11 4/7 2/4 1/5 16/27
xeus-cling 5.3 9/11 4/7 0/4 0/5 13/27
xeus-cpp 5.6 5/11 0/7 0/4 0/5 5/27
xeus-haskell 5.6 7/11 5/7 1/4 2/5 15/27
xeus-lua 5.6 10/11 6/7 1/4 5/5 22/27
xeus-octave unknown 0/1 0/0 0/0 0/0 0/1
xeus-python 5.6 11/11 7/7 4/4 5/5 27/27
xeus-r 5.6 11/11 7/7 3/4 5/5 26/27
xeus-sql 5.6 8/11 5/7 0/4 4/5 17/27
xeus-sqlite 5.6 8/11 6/7 0/4 4/5 18/27
almond (scala) - 15 failures, 0 skipped

Language: scala | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_reply_ok execute_request harness_error Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
status_busy_idle_lifecycle status unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
execute_input_broadcast execute_input unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field history
error_handling execute_request unknown Protocol error: Error deserializing content for msg_type error: missing field traceback
execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mid\u{1b}[39m: \u{1b}[32mString\u{1b}[39m = \u{1b}[32m"a7b2e5a4-a5cd-49ab-9841-7c031a222bc7"\u{1b}[39m", expected internally tagged enum ExpressionResult
rich_execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mres11\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m2\u{1b}[39m", expected internally tagged enum ExpressionResult
stdin_input_request input_request harness_error Timeout waiting for iopub idle (stdin test)
comms_lifecycle comm_open harness_error Kernel unresponsive after comm: Timeout waiting for iopub idle
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status
execution_count_increments execute_request unknown Counts didn't increment: 12 -> 0
shutdown_reply shutdown_request unknown Protocol error: Error deserializing content for msg_type shutdown_reply: missing field status
ark () - 1 failures, 0 skipped

Language: R | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
deno (Deno kernel) - 1 failures, 0 skipped

Language: typescript | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
evcxr (evcxr_jupyter) - 6 failures, 3 skipped

Language: Rust | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • stdin_input_request: Kernel can request input from frontend via stdin channel
gonb (gonb) - 15 failures, 1 skipped

Language: go | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
complete_request complete_request unknown Timeout waiting for shell reply
inspect_request inspect_request unknown Expected inspect_reply, got "execute_reply"
is_complete_complete is_complete_request unknown Expected is_complete_reply, got "inspect_reply"
is_complete_incomplete is_complete_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
ijulia (ijulia) - 2 failures, 1 skipped

Language: julia | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
comm_info_request comm_info_request unknown Timeout waiting for shell reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
ocaml-jupyter (ocaml-jupyter) - 9 failures, 2 skipped

Language: OCaml | Protocol: 5.2

Failures

Test Message Type Likely Source Reason
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field status
comm_info_request comm_info_request unknown Timeout waiting for shell reply
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Timeout waiting for iopub idle
parent_header_correlation parent_header unknown Timeout waiting for iopub idle
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-cling (xeus-cling) - 12 failures, 2 skipped

Language: c++ | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown inspect_reply status: Error
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: data did not match any variant of untagged enum HistoryEntry
comm_info_request comm_info_request unknown Timeout waiting for shell reply
display_data display_data unknown Timeout waiting for iopub idle
update_display_data update_display_data unknown Timeout waiting for iopub idle
execute_result execute_result unknown Protocol error: Codec Error: Broken pipe (os error 32)
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-cpp (xeus-cpp) - 20 failures, 2 skipped

Language: C++ | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown Timeout waiting for iopub idle
execute_stderr stream unknown Timeout waiting for iopub idle
execute_reply_ok execute_request harness_error Protocol error: Codec Error: Broken pipe (os error 32)
status_busy_idle_lifecycle status unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_input_broadcast execute_input unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
complete_request complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
inspect_request inspect_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_complete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_incomplete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
history_request history_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comm_info_request comm_info_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
error_handling execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
display_data display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
update_display_data update_display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_result execute_result unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-haskell (xhaskell) - 8 failures, 4 skipped

Language: haskell | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execution_count_increments execute_request unknown Timeout waiting for iopub idle
parent_header_correlation parent_header unknown Protocol error: Codec Error: Broken pipe (os error 32)
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-lua (xlua) - 3 failures, 2 skipped

Language: lua | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stderr stream unknown No stderr containing 'error'
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-octave (unknown) - 1 failures, 0 skipped

Language: Octave | Protocol: unknown

Failures

Test Message Type Likely Source Reason
kernel_startup kernel_info_request protocol_error Protocol error: Codec Error: Broken pipe (os error 32)
xeus-r (xr) - 1 failures, 0 skipped

Language: R | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
xeus-sql (xsql) - 7 failures, 3 skipped

Language: MySQL | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-sqlite (xsqlite) - 5 failures, 4 skipped

Language: sql | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel

Test Results by Message Type

Test Message Type almond ark async-kernel deno evcxr gonb ijulia ipykernel ocaml-jupyter xeus-cling xeus-cpp xeus-haskell xeus-lua xeus-octave xeus-python xeus-r xeus-sql xeus-sqlite
comm_info_request comm_info_request ✅ ✅ ✅ ✅ ❌ ❌ ❌ ✅ ❌ ❌ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
comms_lifecycle comm_open ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ - ✅ ✅ ✅ ✅
complete_request complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ - ✅ ✅ ✅ ✅
display_data display_data ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ✅ ✅ ❌ ❌ ⏭️ ✅ - ✅ ✅ ⏭️ ⏭️
error_handling execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ - ✅ ✅ ✅ ✅
execute_input_broadcast execute_input ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ - ✅ ✅ ✅ ✅
execute_reply_ok execute_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ❌ ❌
execute_result execute_result ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ❌ ✅ ❌ - ✅ ✅ ❌ ❌
execute_stderr stream ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ❌ - ✅ ✅ ❌ ❌
execute_stdout execute_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ❌ ❌
execution_count_increments execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
heartbeat_responds heartbeat ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
history_request history_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ❌ ✅ ✅ - ✅ ✅ ✅ ✅
inspect_request inspect_request ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ - ✅ ✅ ✅ ✅
interrupt_request interrupt_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ❌ ✅ ✅ - ✅ ✅ ✅ ✅
iopub_welcome iopub_welcome ⚠️ ✅ ✅ ⚠️ ⚠️ ⚠️ ⚠️ ✅ ⚠️ ⚠️ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
is_complete_complete is_complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ⚠️ ✅ ❌ ✅ ✅ - ✅ ✅ ⚠️ ✅
is_complete_incomplete is_complete_request ⚠️ ✅ ✅ ✅ ⚠️ ❌ ✅ ✅ ✅ ✅ ❌ ⚠️ ⚠️ - ✅ ✅ ⚠️ ⚠️
kernel_info_has_language_info kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
kernel_info_has_protocol_version kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
kernel_info_reply_valid kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
kernel_startup kernel_info_request - - - - - - - - - - - - - ❌ - - - -
parent_header_correlation parent_header ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
rich_execute_result execute_result ❌ ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ⏭️ ⏭️ ⏭️ ⏭️ ⏭️ - ✅ ✅ ⏭️ ⏭️
shutdown_reply shutdown_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ❌ ❌ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
status_busy_idle_lifecycle status ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ - ✅ ✅ ✅ ✅
stdin_input_request input_request ❌ ✅ ✅ ✅ ⏭️ ❌ ✅ ✅ ❌ ⏭️ ⏭️ ⏭️ ✅ - ✅ ✅ ❌ ⏭️
update_display_data update_display_data ⚠️ ⚠️ ✅ ✅ ⏭️ ⚠️ ⏭️ ✅ ⏭️ ❌ ❌ ⏭️ ⏭️ - ✅ ⚠️ ⏭️ ⏭️

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github-actions Bot commented Mar 31, 2026

Kernel Conformance Matrix

Kernel Protocol Tier 1 Tier 2 Tier 3 Tier 4 Total
almond 5.4 6/11 4/7 1/4 1/5 12/27
ark 5.4 11/11 7/7 3/4 5/5 26/27
async-kernel 5.5 11/11 7/7 4/4 5/5 27/27
deno 5.3 10/11 7/7 4/4 5/5 26/27
evcxr 5.3 10/11 3/7 2/4 3/5 18/27
gonb 5.4 6/11 1/7 1/4 3/5 11/27
ijulia 5.4 10/11 6/7 3/4 5/5 24/27
ipykernel 5.3 11/11 7/7 4/4 5/5 27/27
ocaml-jupyter 5.2 9/11 4/7 2/4 1/5 16/27
xeus-cling 5.3 10/11 4/7 0/4 0/5 14/27
xeus-cpp 5.6 5/11 0/7 0/4 0/5 5/27
xeus-haskell 5.6 7/11 5/7 1/4 2/5 15/27
xeus-lua 5.6 10/11 6/7 1/4 5/5 22/27
xeus-python 5.6 11/11 7/7 4/4 5/5 27/27
xeus-r 5.6 11/11 7/7 3/4 5/5 26/27
xeus-sql 5.6 8/11 5/7 0/4 4/5 17/27
xeus-sqlite 5.6 8/11 6/7 0/4 4/5 18/27
almond (scala) - 15 failures, 0 skipped

Language: scala | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_reply_ok execute_request harness_error Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
status_busy_idle_lifecycle status unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
execute_input_broadcast execute_input unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field history
error_handling execute_request unknown Protocol error: Error deserializing content for msg_type error: missing field traceback
execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mid\u{1b}[39m: \u{1b}[32mString\u{1b}[39m = \u{1b}[32m"586e0482-f019-4ba9-8bc1-813561241151"\u{1b}[39m", expected internally tagged enum ExpressionResult
rich_execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mres11\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m2\u{1b}[39m", expected internally tagged enum ExpressionResult
stdin_input_request input_request harness_error Timeout waiting for iopub idle (stdin test)
comms_lifecycle comm_open harness_error Kernel unresponsive after comm: Timeout waiting for iopub idle
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status
execution_count_increments execute_request unknown Counts didn't increment: 12 -> 0
shutdown_reply shutdown_request unknown Protocol error: Error deserializing content for msg_type shutdown_reply: missing field status
ark () - 1 failures, 0 skipped

Language: R | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
deno (Deno kernel) - 1 failures, 0 skipped

Language: typescript | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
evcxr (evcxr_jupyter) - 6 failures, 3 skipped

Language: Rust | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • stdin_input_request: Kernel can request input from frontend via stdin channel
gonb (gonb) - 15 failures, 1 skipped

Language: go | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
complete_request complete_request unknown Timeout waiting for shell reply
inspect_request inspect_request unknown Expected inspect_reply, got "execute_reply"
is_complete_complete is_complete_request unknown Expected is_complete_reply, got "inspect_reply"
is_complete_incomplete is_complete_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
ijulia (ijulia) - 2 failures, 1 skipped

Language: julia | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
comm_info_request comm_info_request unknown Timeout waiting for shell reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
ocaml-jupyter (ocaml-jupyter) - 9 failures, 2 skipped

Language: OCaml | Protocol: 5.2

Failures

Test Message Type Likely Source Reason
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field status
comm_info_request comm_info_request unknown Timeout waiting for shell reply
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Timeout waiting for iopub idle
parent_header_correlation parent_header unknown Timeout waiting for iopub idle
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-cling (xeus-cling) - 11 failures, 2 skipped

Language: c++ | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown inspect_reply status: Error
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: data did not match any variant of untagged enum HistoryEntry
comm_info_request comm_info_request unknown Timeout waiting for shell reply
display_data display_data unknown Timeout waiting for iopub idle
update_display_data update_display_data unknown Timeout waiting for iopub idle
execute_result execute_result unknown Protocol error: Codec Error: Broken pipe (os error 32)
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-cpp (xeus-cpp) - 20 failures, 2 skipped

Language: C++ | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown Timeout waiting for iopub idle
execute_stderr stream unknown Timeout waiting for iopub idle
execute_reply_ok execute_request harness_error Protocol error: Codec Error: Broken pipe (os error 32)
status_busy_idle_lifecycle status unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_input_broadcast execute_input unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
complete_request complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
inspect_request inspect_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_complete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_incomplete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
history_request history_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comm_info_request comm_info_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
error_handling execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
display_data display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
update_display_data update_display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_result execute_result unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-haskell (xhaskell) - 8 failures, 4 skipped

Language: haskell | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execution_count_increments execute_request unknown Timeout waiting for iopub idle
parent_header_correlation parent_header unknown Protocol error: Codec Error: Broken pipe (os error 32)
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-lua (xlua) - 3 failures, 2 skipped

Language: lua | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stderr stream unknown No stderr containing 'error'
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-r (xr) - 1 failures, 0 skipped

Language: R | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
xeus-sql (xsql) - 7 failures, 3 skipped

Language: MySQL | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-sqlite (xsqlite) - 5 failures, 4 skipped

Language: sql | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel

Test Results by Message Type

Test Message Type almond ark async-kernel deno evcxr gonb ijulia ipykernel ocaml-jupyter xeus-cling xeus-cpp xeus-haskell xeus-lua xeus-python xeus-r xeus-sql xeus-sqlite
comm_info_request comm_info_request ✅ ✅ ✅ ✅ ❌ ❌ ❌ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅
comms_lifecycle comm_open ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
complete_request complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅
display_data display_data ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ✅ ✅ ❌ ❌ ⏭️ ✅ ✅ ✅ ⏭️ ⏭️
error_handling execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅
execute_input_broadcast execute_input ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅
execute_reply_ok execute_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ❌ ❌
execute_result execute_result ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ❌ ✅ ❌ ✅ ✅ ❌ ❌
execute_stderr stream ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ❌ ❌
execute_stdout execute_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ❌ ❌
execution_count_increments execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅
heartbeat_responds heartbeat ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
history_request history_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
inspect_request inspect_request ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
interrupt_request interrupt_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
iopub_welcome iopub_welcome ⚠️ ✅ ✅ ⚠️ ⚠️ ⚠️ ⚠️ ✅ ⚠️ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
is_complete_complete is_complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ⚠️ ✅ ❌ ✅ ✅ ✅ ✅ ⚠️ ✅
is_complete_incomplete is_complete_request ⚠️ ✅ ✅ ✅ ⚠️ ❌ ✅ ✅ ✅ ✅ ❌ ⚠️ ⚠️ ✅ ✅ ⚠️ ⚠️
kernel_info_has_language_info kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
kernel_info_has_protocol_version kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
kernel_info_reply_valid kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
parent_header_correlation parent_header ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅
rich_execute_result execute_result ❌ ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ⏭️ ⏭️ ⏭️ ⏭️ ⏭️ ✅ ✅ ⏭️ ⏭️
shutdown_reply shutdown_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅
status_busy_idle_lifecycle status ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅
stdin_input_request input_request ❌ ✅ ✅ ✅ ⏭️ ❌ ✅ ✅ ❌ ⏭️ ⏭️ ⏭️ ✅ ✅ ✅ ❌ ⏭️
update_display_data update_display_data ⚠️ ⚠️ ✅ ✅ ⏭️ ⚠️ ⏭️ ✅ ⏭️ ❌ ❌ ⏭️ ⏭️ ✅ ⚠️ ⏭️ ⏭️

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github-actions Bot commented Mar 31, 2026

Kernel Conformance Matrix

Kernel Protocol Tier 1 Tier 2 Tier 3 Tier 4 Total
almond 5.4 6/11 4/7 1/4 1/5 12/27
ark 5.4 11/11 7/7 3/4 5/5 26/27
async-kernel 5.5 11/11 7/7 4/4 5/5 27/27
deno 5.3 10/11 7/7 4/4 5/5 26/27
evcxr 5.3 10/11 3/7 2/4 3/5 18/27
gonb 5.4 6/11 1/7 1/4 3/5 11/27
ijulia 5.4 10/11 6/7 3/4 5/5 24/27
ipykernel 5.3 11/11 7/7 4/4 5/5 27/27
xeus-cling 5.3 10/11 4/7 0/4 0/5 14/27
xeus-cpp 5.6 5/11 0/7 0/4 0/5 5/27
xeus-lua 5.6 10/11 6/7 1/4 5/5 22/27
xeus-octave unknown 0/1 0/0 0/0 0/0 0/1
xeus-python 5.6 11/11 7/7 4/4 5/5 27/27
xeus-r 5.6 11/11 7/7 3/4 5/5 26/27
xeus-sql 5.6 8/11 5/7 0/4 4/5 17/27
xeus-sqlite 5.6 8/11 6/7 0/4 4/5 18/27
almond (scala) - 15 failures, 0 skipped

Language: scala | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_reply_ok execute_request harness_error Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
status_busy_idle_lifecycle status unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
execute_input_broadcast execute_input unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field history
error_handling execute_request unknown Protocol error: Error deserializing content for msg_type error: missing field traceback
execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mid\u{1b}[39m: \u{1b}[32mString\u{1b}[39m = \u{1b}[32m"92ea10c5-2514-4357-bf39-ec7bb08772ef"\u{1b}[39m", expected internally tagged enum ExpressionResult
rich_execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mres11\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m2\u{1b}[39m", expected internally tagged enum ExpressionResult
stdin_input_request input_request harness_error Timeout waiting for iopub idle (stdin test)
comms_lifecycle comm_open harness_error Kernel unresponsive after comm: Timeout waiting for iopub idle
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status
execution_count_increments execute_request unknown Counts didn't increment: 12 -> 0
shutdown_reply shutdown_request unknown Protocol error: Error deserializing content for msg_type shutdown_reply: missing field status
ark () - 1 failures, 0 skipped

Language: R | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
deno (Deno kernel) - 1 failures, 0 skipped

Language: typescript | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
evcxr (evcxr_jupyter) - 6 failures, 3 skipped

Language: Rust | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • stdin_input_request: Kernel can request input from frontend via stdin channel
gonb (gonb) - 15 failures, 1 skipped

Language: go | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
complete_request complete_request unknown Timeout waiting for shell reply
inspect_request inspect_request unknown Expected inspect_reply, got "execute_reply"
is_complete_complete is_complete_request unknown Expected is_complete_reply, got "inspect_reply"
is_complete_incomplete is_complete_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
ijulia (ijulia) - 2 failures, 1 skipped

Language: julia | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
comm_info_request comm_info_request unknown Timeout waiting for shell reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
xeus-cling (xeus-cling) - 11 failures, 2 skipped

Language: c++ | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown inspect_reply status: Error
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: data did not match any variant of untagged enum HistoryEntry
comm_info_request comm_info_request unknown Timeout waiting for shell reply
display_data display_data unknown Timeout waiting for iopub idle
update_display_data update_display_data unknown Timeout waiting for iopub idle
execute_result execute_result unknown Protocol error: Codec Error: Broken pipe (os error 32)
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-cpp (xeus-cpp) - 20 failures, 2 skipped

Language: C++ | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown Timeout waiting for iopub idle
execute_stderr stream unknown Timeout waiting for iopub idle
execute_reply_ok execute_request harness_error Protocol error: Codec Error: Broken pipe (os error 32)
status_busy_idle_lifecycle status unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_input_broadcast execute_input unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
complete_request complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
inspect_request inspect_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_complete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_incomplete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
history_request history_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comm_info_request comm_info_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
error_handling execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
display_data display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
update_display_data update_display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_result execute_result unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-lua (xlua) - 3 failures, 2 skipped

Language: lua | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stderr stream unknown No stderr containing 'error'
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-octave (unknown) - 1 failures, 0 skipped

Language: Octave | Protocol: unknown

Failures

Test Message Type Likely Source Reason
kernel_startup kernel_info_request protocol_error Kernel launch failed: Kernel process exited with signal: 6 (SIGABRT) (core dumped) before connections could be established
xeus-r (xr) - 1 failures, 0 skipped

Language: R | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
xeus-sql (xsql) - 7 failures, 3 skipped

Language: MySQL | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-sqlite (xsqlite) - 5 failures, 4 skipped

Language: sql | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel

Test Results by Message Type

Test Message Type almond ark async-kernel deno evcxr gonb ijulia ipykernel xeus-cling xeus-cpp xeus-lua xeus-octave xeus-python xeus-r xeus-sql xeus-sqlite
comm_info_request comm_info_request ✅ ✅ ✅ ✅ ❌ ❌ ❌ ✅ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
comms_lifecycle comm_open ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
complete_request complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ✅ - ✅ ✅ ✅ ✅
display_data display_data ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ⏭️ ⏭️
error_handling execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ - ✅ ✅ ✅ ✅
execute_input_broadcast execute_input ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ - ✅ ✅ ✅ ✅
execute_reply_ok execute_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ✅ - ✅ ✅ ❌ ❌
execute_result execute_result ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ❌ ❌ ❌ - ✅ ✅ ❌ ❌
execute_stderr stream ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ❌ - ✅ ✅ ❌ ❌
execute_stdout execute_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ✅ - ✅ ✅ ❌ ❌
execution_count_increments execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
heartbeat_responds heartbeat ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
history_request history_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
inspect_request inspect_request ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
interrupt_request interrupt_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
iopub_welcome iopub_welcome ⚠️ ✅ ✅ ⚠️ ⚠️ ⚠️ ⚠️ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
is_complete_complete is_complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ✅ - ✅ ✅ ⚠️ ✅
is_complete_incomplete is_complete_request ⚠️ ✅ ✅ ✅ ⚠️ ❌ ✅ ✅ ✅ ❌ ⚠️ - ✅ ✅ ⚠️ ⚠️
kernel_info_has_language_info kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
kernel_info_has_protocol_version kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
kernel_info_reply_valid kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ - ✅ ✅ ✅ ✅
kernel_startup kernel_info_request - - - - - - - - - - - ❌ - - - -
parent_header_correlation parent_header ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
rich_execute_result execute_result ❌ ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ⏭️ ⏭️ ⏭️ - ✅ ✅ ⏭️ ⏭️
shutdown_reply shutdown_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ❌ ❌ ✅ - ✅ ✅ ✅ ✅
status_busy_idle_lifecycle status ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ - ✅ ✅ ✅ ✅
stdin_input_request input_request ❌ ✅ ✅ ✅ ⏭️ ❌ ✅ ✅ ⏭️ ⏭️ ✅ - ✅ ✅ ❌ ⏭️
update_display_data update_display_data ⚠️ ⚠️ ✅ ✅ ⏭️ ⚠️ ⏭️ ✅ ❌ ❌ ⏭️ - ✅ ⚠️ ⏭️ ⏭️

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github-actions Bot commented Mar 31, 2026

Kernel Conformance Matrix

Kernel Protocol Tier 1 Tier 2 Tier 3 Tier 4 Total
almond 5.4 6/11 4/7 1/4 1/5 12/27
ark 5.4 11/11 7/7 3/4 5/5 26/27
async-kernel 5.5 11/11 7/7 4/4 5/5 27/27
deno 5.3 10/11 7/7 4/4 5/5 26/27
evcxr 5.3 10/11 3/7 2/4 3/5 18/27
gonb 5.4 6/11 1/7 1/4 3/5 11/27
ijulia 5.4 10/11 6/7 3/4 5/5 24/27
ipykernel 5.3 11/11 7/7 4/4 5/5 27/27
ocaml-jupyter 5.2 9/11 4/7 2/4 1/5 16/27
xeus-cling 5.3 10/11 4/7 0/4 0/5 14/27
xeus-cpp 5.6 5/11 0/7 0/4 0/5 5/27
xeus-haskell 5.6 7/11 5/7 1/4 2/5 15/27
xeus-lua 5.6 10/11 6/7 1/4 5/5 22/27
xeus-octave 5.6 11/11 6/7 0/4 4/5 21/27
xeus-python 5.6 11/11 7/7 4/4 5/5 27/27
xeus-r 5.6 11/11 7/7 3/4 5/5 26/27
xeus-sql 5.6 8/11 5/7 0/4 4/5 17/27
xeus-sqlite 5.6 8/11 6/7 0/4 4/5 18/27
almond (scala) - 15 failures, 0 skipped

Language: scala | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_reply_ok execute_request harness_error Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
status_busy_idle_lifecycle status unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
execute_input_broadcast execute_input unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field history
error_handling execute_request unknown Protocol error: Error deserializing content for msg_type error: missing field traceback
execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mid\u{1b}[39m: \u{1b}[32mString\u{1b}[39m = \u{1b}[32m"8fc2a925-485b-4bfc-bccd-594bd59c0cf7"\u{1b}[39m", expected internally tagged enum ExpressionResult
rich_execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mres11\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m2\u{1b}[39m", expected internally tagged enum ExpressionResult
stdin_input_request input_request harness_error Timeout waiting for iopub idle (stdin test)
comms_lifecycle comm_open harness_error Kernel unresponsive after comm: Timeout waiting for iopub idle
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status
execution_count_increments execute_request unknown Counts didn't increment: 12 -> 0
shutdown_reply shutdown_request unknown Protocol error: Error deserializing content for msg_type shutdown_reply: missing field status
ark () - 1 failures, 0 skipped

Language: R | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
deno (Deno kernel) - 1 failures, 0 skipped

Language: typescript | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
evcxr (evcxr_jupyter) - 6 failures, 3 skipped

Language: Rust | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • stdin_input_request: Kernel can request input from frontend via stdin channel
gonb (gonb) - 15 failures, 1 skipped

Language: go | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
complete_request complete_request unknown Timeout waiting for shell reply
inspect_request inspect_request unknown Expected inspect_reply, got "execute_reply"
is_complete_complete is_complete_request unknown Expected is_complete_reply, got "inspect_reply"
is_complete_incomplete is_complete_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
ijulia (ijulia) - 2 failures, 1 skipped

Language: julia | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
comm_info_request comm_info_request unknown Timeout waiting for shell reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
ocaml-jupyter (ocaml-jupyter) - 9 failures, 2 skipped

Language: OCaml | Protocol: 5.2

Failures

Test Message Type Likely Source Reason
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field status
comm_info_request comm_info_request unknown Timeout waiting for shell reply
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Timeout waiting for iopub idle
parent_header_correlation parent_header unknown Timeout waiting for iopub idle
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-cling (xeus-cling) - 11 failures, 2 skipped

Language: c++ | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown inspect_reply status: Error
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: data did not match any variant of untagged enum HistoryEntry
comm_info_request comm_info_request unknown Timeout waiting for shell reply
display_data display_data unknown Timeout waiting for iopub idle
update_display_data update_display_data unknown Timeout waiting for iopub idle
execute_result execute_result unknown Protocol error: Codec Error: Broken pipe (os error 32)
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-cpp (xeus-cpp) - 20 failures, 2 skipped

Language: C++ | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown Timeout waiting for iopub idle
execute_stderr stream unknown Timeout waiting for iopub idle
execute_reply_ok execute_request harness_error Protocol error: Codec Error: Broken pipe (os error 32)
status_busy_idle_lifecycle status unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_input_broadcast execute_input unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
complete_request complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
inspect_request inspect_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_complete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_incomplete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
history_request history_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comm_info_request comm_info_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
error_handling execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
display_data display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
update_display_data update_display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_result execute_result unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-haskell (xhaskell) - 8 failures, 4 skipped

Language: haskell | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execution_count_increments execute_request unknown Timeout waiting for iopub idle
parent_header_correlation parent_header unknown Protocol error: Codec Error: Broken pipe (os error 32)
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-lua (xlua) - 3 failures, 2 skipped

Language: lua | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stderr stream unknown No stderr containing 'error'
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-octave (xoctave) - 2 failures, 4 skipped

Language: Octave | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-r (xr) - 1 failures, 0 skipped

Language: R | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
xeus-sql (xsql) - 7 failures, 3 skipped

Language: MySQL | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-sqlite (xsqlite) - 5 failures, 4 skipped

Language: sql | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel

Test Results by Message Type

Test Message Type almond ark async-kernel deno evcxr gonb ijulia ipykernel ocaml-jupyter xeus-cling xeus-cpp xeus-haskell xeus-lua xeus-octave xeus-python xeus-r xeus-sql xeus-sqlite
comm_info_request comm_info_request ✅ ✅ ✅ ✅ ❌ ❌ ❌ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
comms_lifecycle comm_open ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
complete_request complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
display_data display_data ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ✅ ✅ ❌ ❌ ⏭️ ✅ ⏭️ ✅ ✅ ⏭️ ⏭️
error_handling execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
execute_input_broadcast execute_input ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
execute_reply_ok execute_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ✅ ❌ ❌
execute_result execute_result ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ❌ ✅ ❌ ❌ ✅ ✅ ❌ ❌
execute_stderr stream ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ✅ ❌ ❌
execute_stdout execute_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ✅ ❌ ❌
execution_count_increments execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
heartbeat_responds heartbeat ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
history_request history_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
inspect_request inspect_request ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
interrupt_request interrupt_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
iopub_welcome iopub_welcome ⚠️ ✅ ✅ ⚠️ ⚠️ ⚠️ ⚠️ ✅ ⚠️ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
is_complete_complete is_complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ⚠️ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ⚠️ ✅
is_complete_incomplete is_complete_request ⚠️ ✅ ✅ ✅ ⚠️ ❌ ✅ ✅ ✅ ✅ ❌ ⚠️ ⚠️ ⚠️ ✅ ✅ ⚠️ ⚠️
kernel_info_has_language_info kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
kernel_info_has_protocol_version kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
kernel_info_reply_valid kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
parent_header_correlation parent_header ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
rich_execute_result execute_result ❌ ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ⏭️ ⏭️ ⏭️ ⏭️ ⏭️ ⏭️ ✅ ✅ ⏭️ ⏭️
shutdown_reply shutdown_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
status_busy_idle_lifecycle status ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
stdin_input_request input_request ❌ ✅ ✅ ✅ ⏭️ ❌ ✅ ✅ ❌ ⏭️ ⏭️ ⏭️ ✅ ⏭️ ✅ ✅ ❌ ⏭️
update_display_data update_display_data ⚠️ ⚠️ ✅ ✅ ⏭️ ⚠️ ⏭️ ✅ ⏭️ ❌ ❌ ⏭️ ⏭️ ⏭️ ✅ ⚠️ ⏭️ ⏭️

@rgbkrk
Fix xeus-octave kernel startup in conformance tests
2719876 
xeus-octave was crashing during startup because Octave could not find
its built-in .m script files (specifically graphics_toolkit). This
happened because the OCTAVE_HOME environment variable was not set when
the test harness spawned the kernel process.

Changes:
- Set OCTAVE_HOME and OCTAVE_EXEC_PREFIX env vars in CI for xeus-octave
- Increase per-test timeout to 30s for xeus-octave (Octave is slow to init)
- Detect kernel process crash before attempting ZMQ connections
- Capture kernel stderr for better diagnostics on startup failures
- Retry kernel_info_request up to 3 times for slow-starting kernels
- Increase initial kernel startup delay from 500ms to 2s
@rgbkrk rgbkrk force-pushed the quill/add-xeus-octave branch from 1c41b60 to 2719876 Compare March 31, 2026 16:49
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github-actions Bot commented Mar 31, 2026

Kernel Conformance Matrix

Kernel Protocol Tier 1 Tier 2 Tier 3 Tier 4 Total
almond 5.4 6/11 4/7 1/4 1/5 12/27
ark 5.4 11/11 7/7 3/4 5/5 26/27
async-kernel 5.5 11/11 7/7 4/4 5/5 27/27
deno 5.3 10/11 7/7 4/4 5/5 26/27
evcxr 5.3 10/11 3/7 2/4 3/5 18/27
gonb 5.4 6/11 1/7 1/4 3/5 11/27
ijulia 5.4 10/11 6/7 3/4 5/5 24/27
ipykernel 5.3 11/11 7/7 4/4 5/5 27/27
ocaml-jupyter 5.2 9/11 4/7 2/4 1/5 16/27
xeus-cling 5.3 9/11 4/7 0/4 0/5 13/27
xeus-cpp 5.6 5/11 0/7 0/4 0/5 5/27
xeus-haskell 5.6 7/11 5/7 1/4 2/5 15/27
xeus-lua 5.6 10/11 6/7 1/4 5/5 22/27
xeus-octave 5.6 10/11 1/7 0/4 4/5 15/27
xeus-python 5.6 11/11 7/7 4/4 5/5 27/27
xeus-r 5.6 11/11 7/7 3/4 5/5 26/27
xeus-sql 5.6 8/11 5/7 0/4 4/5 17/27
xeus-sqlite 5.6 8/11 6/7 0/4 4/5 18/27
almond (scala) - 15 failures, 0 skipped

Language: scala | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_reply_ok execute_request harness_error Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
status_busy_idle_lifecycle status unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
execute_input_broadcast execute_input unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mx\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m1\u{1b}[39m", expected internally tagged enum ExpressionResult
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field history
error_handling execute_request unknown Protocol error: Error deserializing content for msg_type error: missing field traceback
execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mid\u{1b}[39m: \u{1b}[32mString\u{1b}[39m = \u{1b}[32m"ddb2029b-8881-4287-8cb9-e1ee6dc638a7"\u{1b}[39m", expected internally tagged enum ExpressionResult
rich_execute_result execute_result unknown Protocol error: Error deserializing content for msg_type execute_reply: invalid type: string "\u{1b}[36mres11\u{1b}[39m: \u{1b}[32mInt\u{1b}[39m = \u{1b}[32m2\u{1b}[39m", expected internally tagged enum ExpressionResult
stdin_input_request input_request harness_error Timeout waiting for iopub idle (stdin test)
comms_lifecycle comm_open harness_error Kernel unresponsive after comm: Timeout waiting for iopub idle
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status
execution_count_increments execute_request unknown Counts didn't increment: 12 -> 0
shutdown_reply shutdown_request unknown Protocol error: Error deserializing content for msg_type shutdown_reply: missing field status
ark () - 1 failures, 0 skipped

Language: R | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
deno (Deno kernel) - 1 failures, 0 skipped

Language: typescript | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
evcxr (evcxr_jupyter) - 6 failures, 3 skipped

Language: Rust | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
interrupt_request interrupt_request unknown Protocol error: Error deserializing content for msg_type interrupt_reply: missing field status

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • stdin_input_request: Kernel can request input from frontend via stdin channel
gonb (gonb) - 15 failures, 1 skipped

Language: go | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
complete_request complete_request unknown Timeout waiting for shell reply
inspect_request inspect_request unknown Expected inspect_reply, got "execute_reply"
is_complete_complete is_complete_request unknown Expected is_complete_reply, got "inspect_reply"
is_complete_incomplete is_complete_request unknown Timeout waiting for shell reply
history_request history_request unknown Timeout waiting for shell reply
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
ijulia (ijulia) - 2 failures, 1 skipped

Language: julia | Protocol: 5.4

Failures

Test Message Type Likely Source Reason
comm_info_request comm_info_request unknown Timeout waiting for shell reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
ocaml-jupyter (ocaml-jupyter) - 9 failures, 2 skipped

Language: OCaml | Protocol: 5.2

Failures

Test Message Type Likely Source Reason
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: missing field status
comm_info_request comm_info_request unknown Timeout waiting for shell reply
stdin_input_request input_request unexpected_content No input_request received on stdin channel
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Timeout waiting for iopub idle
parent_header_correlation parent_header unknown Timeout waiting for iopub idle
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-cling (xeus-cling) - 12 failures, 2 skipped

Language: c++ | Protocol: 5.3

Failures

Test Message Type Likely Source Reason
inspect_request inspect_request unknown inspect_reply status: Error
history_request history_request unknown Protocol error: Error deserializing content for msg_type history_reply: data did not match any variant of untagged enum HistoryEntry
comm_info_request comm_info_request unknown Timeout waiting for shell reply
display_data display_data unknown Timeout waiting for iopub idle
update_display_data update_display_data unknown Timeout waiting for iopub idle
execute_result execute_result unknown Protocol error: Codec Error: Broken pipe (os error 32)
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-cpp (xeus-cpp) - 20 failures, 2 skipped

Language: C++ | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown Timeout waiting for iopub idle
execute_stderr stream unknown Timeout waiting for iopub idle
execute_reply_ok execute_request harness_error Protocol error: Codec Error: Broken pipe (os error 32)
status_busy_idle_lifecycle status unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_input_broadcast execute_input unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
complete_request complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
inspect_request inspect_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_complete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
is_complete_incomplete is_complete_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
history_request history_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comm_info_request comm_info_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
error_handling execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
display_data display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
update_display_data update_display_data unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
execute_result execute_result unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
comms_lifecycle comm_open harness_error Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
interrupt_request interrupt_request unknown Timeout waiting for control reply
execution_count_increments execute_request unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
parent_header_correlation parent_header unknown Protocol error: Failed to deliver message (6 frames) cause of Not connected to peers. Unable to send messages
shutdown_reply shutdown_request unknown Protocol error: Codec Error: Broken pipe (os error 32)

Skipped (Not Implemented)

  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-haskell (xhaskell) - 8 failures, 4 skipped

Language: haskell | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
comm_info_request comm_info_request unknown Timeout waiting for shell reply
execution_count_increments execute_request unknown Timeout waiting for iopub idle
parent_header_correlation parent_header unknown Protocol error: Codec Error: Broken pipe (os error 32)
shutdown_reply shutdown_request unknown Timeout waiting for control reply

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-lua (xlua) - 3 failures, 2 skipped

Language: lua | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stderr stream unknown No stderr containing 'error'
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-octave (xoctave) - 8 failures, 4 skipped

Language: Octave | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown Timeout waiting for iopub idle
complete_request complete_request unknown Expected complete_reply, got "execute_reply"
inspect_request inspect_request unknown Expected inspect_reply, got "execute_reply"
is_complete_complete is_complete_request unknown Expected is_complete_reply, got "inspect_reply"
history_request history_request unknown Expected history_reply, got "execute_reply"
comm_info_request comm_info_request unknown Expected comm_info_reply, got "history_reply"
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel
xeus-r (xr) - 1 failures, 0 skipped

Language: R | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
xeus-sql (xsql) - 7 failures, 3 skipped

Language: MySQL | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub
stdin_input_request input_request unexpected_content No input_request received on stdin channel

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
xeus-sqlite (xsqlite) - 5 failures, 4 skipped

Language: sql | Protocol: 5.6

Failures

Test Message Type Likely Source Reason
execute_stdout execute_request unknown No stdout containing 'hello'
execute_stderr stream unknown No stderr containing 'error'
execute_reply_ok execute_request kernel_error execute_reply status: Error
execute_result execute_result unknown No execute_result on iopub

Skipped (Not Implemented)

  • display_data: Kernel can produce display_data messages for rich output
  • update_display_data: Kernel can update existing displays via update_display_data
  • rich_execute_result: Expression evaluation produces execute_result with rich MIME types (HTML, images, etc.)
  • stdin_input_request: Kernel can request input from frontend via stdin channel

Test Results by Message Type

Test Message Type almond ark async-kernel deno evcxr gonb ijulia ipykernel ocaml-jupyter xeus-cling xeus-cpp xeus-haskell xeus-lua xeus-octave xeus-python xeus-r xeus-sql xeus-sqlite
comm_info_request comm_info_request ✅ ✅ ✅ ✅ ❌ ❌ ❌ ✅ ❌ ❌ ❌ ❌ ✅ ❌ ✅ ✅ ✅ ✅
comms_lifecycle comm_open ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
complete_request complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ❌ ✅ ✅ ✅ ✅
display_data display_data ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ✅ ✅ ❌ ❌ ⏭️ ✅ ⏭️ ✅ ✅ ⏭️ ⏭️
error_handling execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
execute_input_broadcast execute_input ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
execute_reply_ok execute_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ✅ ❌ ❌
execute_result execute_result ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ❌ ❌ ✅ ❌ ❌ ✅ ✅ ❌ ❌
execute_stderr stream ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ✅ ❌ ❌
execute_stdout execute_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ❌ ❌ ✅ ❌ ✅ ✅ ❌ ❌
execution_count_increments execute_request ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
heartbeat_responds heartbeat ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
history_request history_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ❌ ✅ ✅ ✅ ✅
inspect_request inspect_request ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ✅ ✅ ✅ ✅
interrupt_request interrupt_request ❌ ✅ ✅ ✅ ❌ ❌ ✅ ✅ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
iopub_welcome iopub_welcome ⚠️ ✅ ✅ ⚠️ ⚠️ ⚠️ ⚠️ ✅ ⚠️ ⚠️ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
is_complete_complete is_complete_request ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ⚠️ ✅ ❌ ✅ ✅ ❌ ✅ ✅ ⚠️ ✅
is_complete_incomplete is_complete_request ⚠️ ✅ ✅ ✅ ⚠️ ❌ ✅ ✅ ✅ ✅ ❌ ⚠️ ⚠️ ⚠️ ✅ ✅ ⚠️ ⚠️
kernel_info_has_language_info kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
kernel_info_has_protocol_version kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
kernel_info_reply_valid kernel_info_request ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
parent_header_correlation parent_header ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
rich_execute_result execute_result ❌ ✅ ✅ ✅ ✅ ⏭️ ✅ ✅ ⏭️ ⏭️ ⏭️ ⏭️ ⏭️ ⏭️ ✅ ✅ ⏭️ ⏭️
shutdown_reply shutdown_request ❌ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ❌ ❌ ❌ ❌ ✅ ✅ ✅ ✅ ✅ ✅
status_busy_idle_lifecycle status ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌ ✅ ✅ ✅ ✅ ✅ ✅ ✅
stdin_input_request input_request ❌ ✅ ✅ ✅ ⏭️ ❌ ✅ ✅ ❌ ⏭️ ⏭️ ⏭️ ✅ ⏭️ ✅ ✅ ❌ ⏭️
update_display_data update_display_data ⚠️ ⚠️ ✅ ✅ ⏭️ ⚠️ ⏭️ ✅ ⏭️ ❌ ❌ ⏭️ ⏭️ ⏭️ ✅ ⚠️ ⏭️ ⏭️

@rgbkrk rgbkrk marked this pull request as ready for review March 31, 2026 19:07
@rgbkrk rgbkrk merged commit b3c08be into main Mar 31, 2026
20 checks passed
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@rgbkrk