From afca602fc5e996f8518f4a5708242dd0d8f9b3b7 Mon Sep 17 00:00:00 2001
From: Mish Ushakov <10400064+mishushakov@users.noreply.github.com>
Date: Wed, 13 May 2026 15:34:59 +0200
Subject: [PATCH 1/2] Remove Deno kernel

Drops the Deno Jupyter kernel from the template along with its
language tests, kernel spec, env vars, and language branches in the
messaging server.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
---
 js/tests/languages/deno.test.ts     | 99 -----------------------------
 python/tests/languages/test_deno.py | 97 ----------------------------
 template/deno.json                  | 14 ----
 template/server/messaging.py        |  8 ---
 template/template.py                | 14 +---
 5 files changed, 1 insertion(+), 231 deletions(-)
 delete mode 100644 js/tests/languages/deno.test.ts
 delete mode 100644 python/tests/languages/test_deno.py
 delete mode 100644 template/deno.json

diff --git a/js/tests/languages/deno.test.ts b/js/tests/languages/deno.test.ts
deleted file mode 100644
index a595f7a9..00000000
--- a/js/tests/languages/deno.test.ts
+++ /dev/null
@@ -1,99 +0,0 @@
-import { expect } from 'vitest'
-
-import { sandboxTest } from '../setup'
-
-sandboxTest.skip('js simple', async ({ sandbox }) => {
-  const result = await sandbox.runCode('console.log("Hello, World!")', {
-    language: 'deno',
-  })
-
-  expect(result.logs.stdout.join().trim()).toEqual('Hello, World!')
-})
-
-sandboxTest.skip('js import', async ({ sandbox }) => {
-  const result = await sandbox.runCode(
-    'import isOdd from "npm:is-odd"\nisOdd(3)',
-    { language: 'deno' }
-  )
-
-  expect(result.results[0].text).toEqual('true')
-})
-
-sandboxTest.skip('js top level await', async ({ sandbox }) => {
-  const result = await sandbox.runCode(
-    `
-    async function main() {
-        return 'Hello, World!'
-    }
-  
-    await main()
-    `,
-    { language: 'deno' }
-  )
-  expect(result.results[0].text).toEqual('Hello, World!')
-})
-
-sandboxTest.skip('js es6', async ({ sandbox }) => {
-  const result = await sandbox.runCode(
-    `
-   const add = (x, y) => x + y;
-   add(1, 2)`,
-    { language: 'deno' }
-  )
-  expect(result.results[0].text).toEqual('3')
-})
-
-sandboxTest.skip('js context', async ({ sandbox }) => {
-  await sandbox.runCode('const z = 1', { language: 'deno' })
-  const result = await sandbox.runCode('z', { language: 'deno' })
-  expect(result.results[0].text).toEqual('1')
-})
-
-sandboxTest.skip('js cwd', async ({ sandbox }) => {
-  const result = await sandbox.runCode('process.cwd()', { language: 'deno' })
-  expect(result.results[0].text).toEqual('/home/user')
-
-  const ctx = await sandbox.createCodeContext({
-    cwd: '/home',
-    language: 'deno',
-  })
-  const result2 = await sandbox.runCode('process.cwd()', { context: ctx })
-  expect(result2.results[0].text).toEqual('/home')
-})
-
-sandboxTest.skip('ts simple', async ({ sandbox }) => {
-  const result = await sandbox.runCode(
-    `
-function subtract(x: number, y: number): number {
-  return x - y;
-}
-
-subtract(1, 2)
-`,
-    { language: 'deno' }
-  )
-
-  expect(result.results[0].text).toEqual('-1')
-})
-
-sandboxTest.skip('test display', async ({ sandbox }) => {
-  const result = await sandbox.runCode(
-    `
-   {
-  [Symbol.for("Jupyter.display")]() {
-    return {
-      // Plain text content
-      "text/plain": "Hello world!",
-
-      // HTML output
-      "text/html": "<h1>Hello world!</h1>",
-    }
-  }
-}
-`,
-    { language: 'deno' }
-  )
-
-  expect(result.results[0].html).toBe('<h1>Hello world!</h1>')
-  expect(result.results[0].text).toBe('Hello world!')
-})
diff --git a/python/tests/languages/test_deno.py b/python/tests/languages/test_deno.py
deleted file mode 100644
index 74c3e57b..00000000
--- a/python/tests/languages/test_deno.py
+++ /dev/null
@@ -1,97 +0,0 @@
-import pytest
-
-from e2b_code_interpreter import AsyncSandbox
-
-
-@pytest.mark.skip(reason="Deno is not supported yet")
-async def test_javascript(async_sandbox: AsyncSandbox):
-    code = """
-    console.log('Hello, World!')
-    """
-    execution = await async_sandbox.run_code(code, language="deno")
-    assert execution.logs.stdout == ["Hello, World!\n"]
-
-
-@pytest.mark.skip(reason="Deno is not supported yet")
-async def test_import(async_sandbox: AsyncSandbox):
-    code = """
-    import isOdd from 'npm:is-odd'
-    isOdd(3)
-    """
-    execution = await async_sandbox.run_code(code, language="deno")
-    assert execution.results[0].text == "true"
-
-
-@pytest.mark.skip(reason="Deno is not supported yet")
-async def test_toplevel_await(async_sandbox: AsyncSandbox):
-    code = """
-    async function main() {
-        return 'Hello, World!'
-    }
-    
-    await main()
-    """
-    execution = await async_sandbox.run_code(code, language="deno")
-    assert execution.results[0].text == "Hello, World!"
-
-
-@pytest.mark.skip(reason="Deno is not supported yet")
-async def test_es6(async_sandbox: AsyncSandbox):
-    code = """
-const add = (x, y) => x + y;
-add(1, 2);
-    """
-    execution = await async_sandbox.run_code(code, language="deno")
-    assert execution.results[0].text == "3"
-
-
-@pytest.mark.skip(reason="Deno is not supported yet")
-async def test_context(async_sandbox: AsyncSandbox):
-    await async_sandbox.run_code("const x = 1", language="deno")
-    execution = await async_sandbox.run_code("x", language="deno")
-    assert execution.results[0].text == "1"
-
-
-@pytest.mark.skip(reason="Deno is not supported yet")
-async def test_cwd(async_sandbox: AsyncSandbox):
-    execution = await async_sandbox.run_code("process.cwd()", language="deno")
-    assert execution.results[0].text == "/home/user"
-
-    ctx = await async_sandbox.create_code_context("/home", language="deno")
-    execution = await async_sandbox.run_code("process.cwd()", context=ctx)
-    assert execution.results[0].text == "/home"
-
-
-@pytest.mark.skip(reason="Deno is not supported yet")
-async def test_typescript(async_sandbox: AsyncSandbox):
-    execution = await async_sandbox.run_code(
-        """
-function subtract(x: number, y: number): number {
-  return x - y;
-}
-  
-subtract(1, 2);
-""",
-        language="deno",
-    )
-    assert execution.results[0].text == "-1"
-
-
-@pytest.mark.skip(reason="Deno is not supported yet")
-async def test_display(async_sandbox: AsyncSandbox):
-    code = """
-{
-  [Symbol.for("Jupyter.display")]() {
-    return {
-      // Plain text content
-      "text/plain": "Hello world!",
-
-      // HTML output
-      "text/html": "<h1>Hello world!</h1>",
-    }
-  }
-}
-    """
-    execution = await async_sandbox.run_code(code, language="deno")
-    assert execution.results[0].text == "Hello world!"
-    assert execution.results[0].html == "<h1>Hello world!</h1>"
diff --git a/template/deno.json b/template/deno.json
deleted file mode 100644
index 3c491e44..00000000
--- a/template/deno.json
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "argv": [
-    "/usr/bin/deno",
-    "jupyter",
-    "--kernel",
-    "--conn",
-    "{connection_file}"
-  ],
-  "display_name": "Deno",
-  "env": {
-    "NO_COLOR": "1"
-  },
-  "language": "typescript"
-}
diff --git a/template/server/messaging.py b/template/server/messaging.py
index d5fdb270..0db59af0 100644
--- a/template/server/messaging.py
+++ b/template/server/messaging.py
@@ -154,8 +154,6 @@ def _set_env_var_snippet(self, key: str, value: str) -> str:
             return f"import os; os.environ['{key}'] = '{value}'"
         elif self.language in ["javascript", "typescript"]:
             return f"process.env['{key}'] = '{value}'"
-        elif self.language == "deno":
-            return f"Deno.env.set('{key}', '{value}')"
         elif self.language == "r":
             return f'Sys.setenv({key} = "{value}")'
         elif self.language == "java":
@@ -170,8 +168,6 @@ def _delete_env_var_snippet(self, key: str) -> str:
             return f"import os; del os.environ['{key}']"
         elif self.language in ["javascript", "typescript"]:
             return f"delete process.env['{key}']"
-        elif self.language == "deno":
-            return f"Deno.env.delete('{key}')"
         elif self.language == "r":
             return f"Sys.unsetenv('{key}')"
         elif self.language == "java":
@@ -297,10 +293,6 @@ async def change_current_directory(
         self._executions[message_id] = Execution(in_background=True)
         if language == "python":
             request = self._get_execute_request(message_id, f"%cd {path}", True)
-        elif language == "deno":
-            request = self._get_execute_request(
-                message_id, f"Deno.chdir('{path}')", True
-            )
         elif language in ("javascript", "typescript"):
             request = self._get_execute_request(
                 message_id, f"process.chdir('{path}')", True
diff --git a/template/template.py b/template/template.py
index 9101636a..62fec9e2 100644
--- a/template/template.py
+++ b/template/template.py
@@ -2,7 +2,7 @@
 
 
 def make_template(
-    kernels: list[str] = ["python", "r", "javascript", "deno", "bash", "java"],
+    kernels: list[str] = ["python", "r", "javascript", "bash", "java"],
     is_docker: bool = False,
 ):
     enabled_kernels = set(["python", "javascript"] + kernels)
@@ -20,8 +20,6 @@ def make_template(
                 "JAVA_VERSION": "11",
                 "JAVA_HOME": "/usr/lib/jvm/jdk-${JAVA_VERSION}",
                 "IJAVA_VERSION": "1.3.0",
-                "DENO_INSTALL": "/opt/deno",
-                "DENO_VERSION": "v2.4.0",
                 "R_VERSION": "4.5.*",
             }
         )
@@ -62,16 +60,6 @@ def make_template(
             g=True,
         ).run_cmd("ijsinstall --install=global")
 
-    # Install Deno Kernel if requested
-    if "deno" in enabled_kernels:
-        template = template.run_cmd(
-            [
-                "curl -fsSL https://deno.land/install.sh | sh -s ${DENO_VERSION}",
-                "PATH=$DENO_INSTALL/bin:$PATH",
-                "deno jupyter --unstable --install",
-            ]
-        ).copy("deno.json", ".local/share/jupyter/kernels/deno/kernel.json")
-
     # Install Bash Kernel if requested
     if "bash" in enabled_kernels:
         template = template.pip_install("bash_kernel").run_cmd(

From 25325b5857dde9ce51ae5d263ef67119e8a9a0f2 Mon Sep 17 00:00:00 2001
From: Mish Ushakov <10400064+mishushakov@users.noreply.github.com>
Date: Wed, 13 May 2026 20:30:47 +0200
Subject: [PATCH 2/2] Add changeset for Deno kernel removal

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
---
 .changeset/remove-deno-kernel.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/remove-deno-kernel.md

diff --git a/.changeset/remove-deno-kernel.md b/.changeset/remove-deno-kernel.md
new file mode 100644
index 00000000..6de7819d
--- /dev/null
+++ b/.changeset/remove-deno-kernel.md
@@ -0,0 +1,5 @@
+---
+'@e2b/code-interpreter-template': minor
+---
+
+remove Deno kernel