app-server: Add streaming and tty/pty capabilities to command/exec (#13640)

* Add an ability to stream stdin, stdout, and stderr
* Streaming of stdout and stderr has a configurable cap for total amount
of transmitted bytes (with an ability to disable it)
* Add support for overriding environment variables
* Add an ability to terminate running applications (using
`command/exec/terminate`)
* Add TTY/PTY support, with an ability to resize the terminal (using
`command/exec/resize`)
This commit is contained in:
Ruslan Nigmatullin
2026-03-06 17:30:17 -08:00
committed by GitHub
parent 61098c7f51
commit e9bd8b20a1
43 changed files with 4205 additions and 70 deletions

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@@ -0,0 +1,55 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"definitions": {
"CommandExecOutputStream": {
"description": "Stream label for `command/exec/outputDelta` notifications.",
"oneOf": [
{
"description": "stdout stream. PTY mode multiplexes terminal output here.",
"enum": [
"stdout"
],
"type": "string"
},
{
"description": "stderr stream.",
"enum": [
"stderr"
],
"type": "string"
}
]
}
},
"description": "Base64-encoded output chunk emitted for a streaming `command/exec` request.\n\nThese notifications are connection-scoped. If the originating connection closes, the server terminates the process.",
"properties": {
"capReached": {
"description": "`true` on the final streamed chunk for a stream when `outputBytesCap` truncated later output on that stream.",
"type": "boolean"
},
"deltaBase64": {
"description": "Base64-encoded output bytes.",
"type": "string"
},
"processId": {
"description": "Client-supplied, connection-scoped `processId` from the original `command/exec` request.",
"type": "string"
},
"stream": {
"allOf": [
{
"$ref": "#/definitions/CommandExecOutputStream"
}
],
"description": "Output stream for this chunk."
}
},
"required": [
"capReached",
"deltaBase64",
"processId",
"stream"
],
"title": "CommandExecOutputDeltaNotification",
"type": "object"
}

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@@ -5,6 +5,28 @@
"description": "A path that is guaranteed to be absolute and normalized (though it is not guaranteed to be canonicalized or exist on the filesystem).\n\nIMPORTANT: When deserializing an `AbsolutePathBuf`, a base path must be set using [AbsolutePathBufGuard::new]. If no base path is set, the deserialization will fail unless the path being deserialized is already absolute.",
"type": "string"
},
"CommandExecTerminalSize": {
"description": "PTY size in character cells for `command/exec` PTY sessions.",
"properties": {
"cols": {
"description": "Terminal width in character cells.",
"format": "uint16",
"minimum": 0.0,
"type": "integer"
},
"rows": {
"description": "Terminal height in character cells.",
"format": "uint16",
"minimum": 0.0,
"type": "integer"
}
},
"required": [
"cols",
"rows"
],
"type": "object"
},
"NetworkAccess": {
"enum": [
"restricted",
@@ -179,14 +201,54 @@
]
}
},
"description": "Run a standalone command (argv vector) in the server sandbox without creating a thread or turn.\n\nThe final `command/exec` response is deferred until the process exits and is sent only after all `command/exec/outputDelta` notifications for that connection have been emitted.",
"properties": {
"command": {
"description": "Command argv vector. Empty arrays are rejected.",
"items": {
"type": "string"
},
"type": "array"
},
"cwd": {
"description": "Optional working directory. Defaults to the server cwd.",
"type": [
"string",
"null"
]
},
"disableOutputCap": {
"description": "Disable stdout/stderr capture truncation for this request.\n\nCannot be combined with `outputBytesCap`.",
"type": "boolean"
},
"disableTimeout": {
"description": "Disable the timeout entirely for this request.\n\nCannot be combined with `timeoutMs`.",
"type": "boolean"
},
"env": {
"additionalProperties": {
"type": [
"string",
"null"
]
},
"description": "Optional environment overrides merged into the server-computed environment.\n\nMatching names override inherited values. Set a key to `null` to unset an inherited variable.",
"type": [
"object",
"null"
]
},
"outputBytesCap": {
"description": "Optional per-stream stdout/stderr capture cap in bytes.\n\nWhen omitted, the server default applies. Cannot be combined with `disableOutputCap`.",
"format": "uint",
"minimum": 0.0,
"type": [
"integer",
"null"
]
},
"processId": {
"description": "Optional client-supplied, connection-scoped process id.\n\nRequired for `tty`, `streamStdin`, `streamStdoutStderr`, and follow-up `command/exec/write`, `command/exec/resize`, and `command/exec/terminate` calls. When omitted, buffered execution gets an internal id that is not exposed to the client.",
"type": [
"string",
"null"
@@ -200,14 +262,39 @@
{
"type": "null"
}
]
],
"description": "Optional sandbox policy for this command.\n\nUses the same shape as thread/turn execution sandbox configuration and defaults to the user's configured policy when omitted."
},
"size": {
"anyOf": [
{
"$ref": "#/definitions/CommandExecTerminalSize"
},
{
"type": "null"
}
],
"description": "Optional initial PTY size in character cells. Only valid when `tty` is true."
},
"streamStdin": {
"description": "Allow follow-up `command/exec/write` requests to write stdin bytes.\n\nRequires a client-supplied `processId`.",
"type": "boolean"
},
"streamStdoutStderr": {
"description": "Stream stdout/stderr via `command/exec/outputDelta` notifications.\n\nStreamed bytes are not duplicated into the final response and require a client-supplied `processId`.",
"type": "boolean"
},
"timeoutMs": {
"description": "Optional timeout in milliseconds.\n\nWhen omitted, the server default applies. Cannot be combined with `disableTimeout`.",
"format": "int64",
"type": [
"integer",
"null"
]
},
"tty": {
"description": "Enable PTY mode.\n\nThis implies `streamStdin` and `streamStdoutStderr`.",
"type": "boolean"
}
},
"required": [

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@@ -0,0 +1,48 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"definitions": {
"CommandExecTerminalSize": {
"description": "PTY size in character cells for `command/exec` PTY sessions.",
"properties": {
"cols": {
"description": "Terminal width in character cells.",
"format": "uint16",
"minimum": 0.0,
"type": "integer"
},
"rows": {
"description": "Terminal height in character cells.",
"format": "uint16",
"minimum": 0.0,
"type": "integer"
}
},
"required": [
"cols",
"rows"
],
"type": "object"
}
},
"description": "Resize a running PTY-backed `command/exec` session.",
"properties": {
"processId": {
"description": "Client-supplied, connection-scoped `processId` from the original `command/exec` request.",
"type": "string"
},
"size": {
"allOf": [
{
"$ref": "#/definitions/CommandExecTerminalSize"
}
],
"description": "New PTY size in character cells."
}
},
"required": [
"processId",
"size"
],
"title": "CommandExecResizeParams",
"type": "object"
}

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@@ -0,0 +1,6 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"description": "Empty success response for `command/exec/resize`.",
"title": "CommandExecResizeResponse",
"type": "object"
}

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@@ -1,14 +1,18 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"description": "Final buffered result for `command/exec`.",
"properties": {
"exitCode": {
"description": "Process exit code.",
"format": "int32",
"type": "integer"
},
"stderr": {
"description": "Buffered stderr capture.\n\nEmpty when stderr was streamed via `command/exec/outputDelta`.",
"type": "string"
},
"stdout": {
"description": "Buffered stdout capture.\n\nEmpty when stdout was streamed via `command/exec/outputDelta`.",
"type": "string"
}
},

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@@ -0,0 +1,15 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"description": "Terminate a running `command/exec` session.",
"properties": {
"processId": {
"description": "Client-supplied, connection-scoped `processId` from the original `command/exec` request.",
"type": "string"
}
},
"required": [
"processId"
],
"title": "CommandExecTerminateParams",
"type": "object"
}

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@@ -0,0 +1,6 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"description": "Empty success response for `command/exec/terminate`.",
"title": "CommandExecTerminateResponse",
"type": "object"
}

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@@ -0,0 +1,26 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"description": "Write stdin bytes to a running `command/exec` session, close stdin, or both.",
"properties": {
"closeStdin": {
"description": "Close stdin after writing `deltaBase64`, if present.",
"type": "boolean"
},
"deltaBase64": {
"description": "Optional base64-encoded stdin bytes to write.",
"type": [
"string",
"null"
]
},
"processId": {
"description": "Client-supplied, connection-scoped `processId` from the original `command/exec` request.",
"type": "string"
}
},
"required": [
"processId"
],
"title": "CommandExecWriteParams",
"type": "object"
}

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@@ -0,0 +1,6 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"description": "Empty success response for `command/exec/write`.",
"title": "CommandExecWriteResponse",
"type": "object"
}