Files
codex/codex-rs/app-server-protocol/schema/json/v2/ThreadStartParams.json
T
sayan-oai 11faf9af94 Expose explicit dynamic tool namespaces in thread start (#27371)
Stacked on #27365.

## Stack note

[#27365](https://github.com/openai/codex/pull/27365) kept `thread/start`
unchanged and converted its input in `thread_processor`. This PR updates
`thread/start` to accept explicit functions and namespaces directly.

Legacy per-tool arrays are still accepted and converted while reading
the request. As a result, `thread_processor` can validate and pass the
tools through directly, which is why some code added in #27365 is
removed here.

## Why

`thread/start.dynamicTools` still repeats namespace data on each
function even though core now stores explicit namespace groups. The
request API should use the same shape so each namespace has one
description and one member list.

## What changed

- Accept top-level functions and explicit namespace objects in
`dynamicTools`.
- Continue accepting fully legacy flat arrays, including
`exposeToContext`.
- Reject arrays that mix legacy and canonical entries.
- Reuse the protocol types directly and remove the temporary app-server
adapter.
- Update validation, docs, the test client, and generated schemas.

## Test plan

- `just test -p codex-app-server-protocol`
- `just test -p codex-app-server
dynamic_tool_call_round_trip_sends_text_content_items_to_model`
- `just test -p codex-app-server
thread_start_normalizes_legacy_dynamic_tools_into_model_request`
- `just test -p codex-app-server
thread_start_rejects_mixed_dynamic_tool_formats`
- `just test -p codex-app-server
thread_start_rejects_hidden_dynamic_tools_without_namespace`
2026-06-15 15:35:57 +00:00

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JSON
Generated

{
"$schema": "http://json-schema.org/draft-07/schema#",
"definitions": {
"AbsolutePathBuf": {
"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"
},
"ApprovalsReviewer": {
"description": "Configures who approval requests are routed to for review. Examples include sandbox escapes, blocked network access, MCP approval prompts, and ARC escalations. Defaults to `user`. `auto_review` uses a carefully prompted subagent to gather relevant context and apply a risk-based decision framework before approving or denying the request. The legacy value `guardian_subagent` is accepted for compatibility.",
"enum": [
"user",
"auto_review",
"guardian_subagent"
],
"type": "string"
},
"AskForApproval": {
"oneOf": [
{
"enum": [
"untrusted",
"on-failure",
"on-request",
"never"
],
"type": "string"
},
{
"additionalProperties": false,
"properties": {
"granular": {
"properties": {
"mcp_elicitations": {
"type": "boolean"
},
"request_permissions": {
"default": false,
"type": "boolean"
},
"rules": {
"type": "boolean"
},
"sandbox_approval": {
"type": "boolean"
},
"skill_approval": {
"default": false,
"type": "boolean"
}
},
"required": [
"mcp_elicitations",
"rules",
"sandbox_approval"
],
"type": "object"
}
},
"required": [
"granular"
],
"title": "GranularAskForApproval",
"type": "object"
}
]
},
"CapabilityRootLocation": {
"description": "Location used to resolve a selected capability root.",
"oneOf": [
{
"description": "A path owned by an execution environment.",
"properties": {
"environmentId": {
"type": "string"
},
"path": {
"type": "string"
},
"type": {
"enum": [
"environment"
],
"title": "EnvironmentCapabilityRootLocationType",
"type": "string"
}
},
"required": [
"environmentId",
"path",
"type"
],
"title": "EnvironmentCapabilityRootLocation",
"type": "object"
}
]
},
"DynamicToolNamespaceTool": {
"oneOf": [
{
"properties": {
"deferLoading": {
"type": "boolean"
},
"description": {
"type": "string"
},
"inputSchema": true,
"name": {
"type": "string"
},
"type": {
"enum": [
"function"
],
"title": "FunctionDynamicToolNamespaceToolType",
"type": "string"
}
},
"required": [
"description",
"inputSchema",
"name",
"type"
],
"title": "FunctionDynamicToolNamespaceTool",
"type": "object"
}
]
},
"DynamicToolSpec": {
"oneOf": [
{
"properties": {
"deferLoading": {
"type": "boolean"
},
"description": {
"type": "string"
},
"inputSchema": true,
"name": {
"type": "string"
},
"type": {
"enum": [
"function"
],
"title": "FunctionDynamicToolSpecType",
"type": "string"
}
},
"required": [
"description",
"inputSchema",
"name",
"type"
],
"title": "FunctionDynamicToolSpec",
"type": "object"
},
{
"properties": {
"description": {
"type": "string"
},
"name": {
"type": "string"
},
"tools": {
"items": {
"$ref": "#/definitions/DynamicToolNamespaceTool"
},
"type": "array"
},
"type": {
"enum": [
"namespace"
],
"title": "NamespaceDynamicToolSpecType",
"type": "string"
}
},
"required": [
"description",
"name",
"tools",
"type"
],
"title": "NamespaceDynamicToolSpec",
"type": "object"
}
]
},
"Personality": {
"enum": [
"none",
"friendly",
"pragmatic"
],
"type": "string"
},
"SandboxMode": {
"enum": [
"read-only",
"workspace-write",
"danger-full-access"
],
"type": "string"
},
"SelectedCapabilityRoot": {
"description": "A user-selected root that can expose one or more runtime capabilities.",
"properties": {
"id": {
"description": "Stable identifier supplied by the capability selection platform.",
"type": "string"
},
"location": {
"allOf": [
{
"$ref": "#/definitions/CapabilityRootLocation"
}
],
"description": "Where the selected root can be resolved."
}
},
"required": [
"id",
"location"
],
"type": "object"
},
"ThreadSource": {
"type": "string"
},
"ThreadStartSource": {
"enum": [
"startup",
"clear"
],
"type": "string"
},
"TurnEnvironmentParams": {
"properties": {
"cwd": {
"$ref": "#/definitions/AbsolutePathBuf"
},
"environmentId": {
"type": "string"
}
},
"required": [
"cwd",
"environmentId"
],
"type": "object"
}
},
"properties": {
"approvalPolicy": {
"anyOf": [
{
"$ref": "#/definitions/AskForApproval"
},
{
"type": "null"
}
]
},
"approvalsReviewer": {
"anyOf": [
{
"$ref": "#/definitions/ApprovalsReviewer"
},
{
"type": "null"
}
],
"description": "Override where approval requests are routed for review on this thread and subsequent turns."
},
"baseInstructions": {
"type": [
"string",
"null"
]
},
"config": {
"additionalProperties": true,
"type": [
"object",
"null"
]
},
"cwd": {
"type": [
"string",
"null"
]
},
"developerInstructions": {
"type": [
"string",
"null"
]
},
"ephemeral": {
"type": [
"boolean",
"null"
]
},
"model": {
"type": [
"string",
"null"
]
},
"modelProvider": {
"type": [
"string",
"null"
]
},
"personality": {
"anyOf": [
{
"$ref": "#/definitions/Personality"
},
{
"type": "null"
}
]
},
"sandbox": {
"anyOf": [
{
"$ref": "#/definitions/SandboxMode"
},
{
"type": "null"
}
]
},
"serviceName": {
"type": [
"string",
"null"
]
},
"serviceTier": {
"type": [
"string",
"null"
]
},
"sessionStartSource": {
"anyOf": [
{
"$ref": "#/definitions/ThreadStartSource"
},
{
"type": "null"
}
]
},
"threadSource": {
"anyOf": [
{
"$ref": "#/definitions/ThreadSource"
},
{
"type": "null"
}
],
"description": "Optional client-supplied analytics source classification for this thread."
}
},
"title": "ThreadStartParams",
"type": "object"
}