Files
codex/codex-rs/app-server-protocol/schema/json/v2/TurnStartParams.json
Michael Bolin 425fff7ad6 feat: add Reject approval policy with granular prompt rejection controls (#12087)
## Why

We need a way to auto-reject specific approval prompt categories without
switching all approvals off.

The goal is to let users independently control:
- sandbox escalation approvals,
- execpolicy `prompt` rule approvals,
- MCP elicitation prompts.

## What changed

- Added a new primary approval mode in `protocol/src/protocol.rs`:

```rust
pub enum AskForApproval {
    // ...
    Reject(RejectConfig),
    // ...
}

pub struct RejectConfig {
    pub sandbox_approval: bool,
    pub rules: bool,
    pub mcp_elicitations: bool,
}
```

- Wired `RejectConfig` semantics through approval paths in `core`:
  - `core/src/exec_policy.rs`
    - rejects rule-driven prompts when `rules = true`
    - rejects sandbox/escalation prompts when `sandbox_approval = true`
- preserves rule priority when both rule and sandbox prompt conditions
are present
  - `core/src/tools/sandboxing.rs`
- applies `sandbox_approval` to default exec approval decisions and
sandbox-failure retry gating
  - `core/src/safety.rs`
- keeps `Reject { all false }` behavior aligned with `OnRequest` for
patch safety
    - rejects out-of-root patch approvals when `sandbox_approval = true`
  - `core/src/mcp_connection_manager.rs`
    - auto-declines MCP elicitations when `mcp_elicitations = true`

- Ensured approval policy used by MCP elicitation flow stays in sync
with constrained session policy updates.

- Updated app-server v2 conversions and generated schema/TypeScript
artifacts for the new `Reject` shape.

## Verification

Added focused unit coverage for the new behavior in:
- `core/src/exec_policy.rs`
- `core/src/tools/sandboxing.rs`
- `core/src/mcp_connection_manager.rs`
- `core/src/safety.rs`
- `core/src/tools/runtimes/apply_patch.rs`

Key cases covered include rule-vs-sandbox prompt precedence, MCP
auto-decline behavior, and patch/sandbox retry behavior under
`RejectConfig`.
2026-02-19 11:41:49 -08:00

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{
"$schema": "http://json-schema.org/draft-07/schema#",
"definitions": {
"AbsolutePathBuf": {
"description": "A path that is guaranteed to be absolute and normalized (though it is not guaranteed to be canonicalized or exist on the filesystem).\n\nIMPORTANT: When deserializing an `AbsolutePathBuf`, a base path must be set using [AbsolutePathBufGuard::new]. If no base path is set, the deserialization will fail unless the path being deserialized is already absolute.",
"type": "string"
},
"AskForApproval": {
"oneOf": [
{
"enum": [
"untrusted",
"on-failure",
"on-request",
"never"
],
"type": "string"
},
{
"additionalProperties": false,
"properties": {
"reject": {
"properties": {
"mcp_elicitations": {
"type": "boolean"
},
"rules": {
"type": "boolean"
},
"sandbox_approval": {
"type": "boolean"
}
},
"required": [
"mcp_elicitations",
"rules",
"sandbox_approval"
],
"type": "object"
}
},
"required": [
"reject"
],
"title": "RejectAskForApproval",
"type": "object"
}
]
},
"ByteRange": {
"properties": {
"end": {
"format": "uint",
"minimum": 0.0,
"type": "integer"
},
"start": {
"format": "uint",
"minimum": 0.0,
"type": "integer"
}
},
"required": [
"end",
"start"
],
"type": "object"
},
"CollaborationMode": {
"description": "Collaboration mode for a Codex session.",
"properties": {
"mode": {
"$ref": "#/definitions/ModeKind"
},
"settings": {
"$ref": "#/definitions/Settings"
}
},
"required": [
"mode",
"settings"
],
"type": "object"
},
"ModeKind": {
"description": "Initial collaboration mode to use when the TUI starts.",
"enum": [
"plan",
"default"
],
"type": "string"
},
"NetworkAccess": {
"enum": [
"restricted",
"enabled"
],
"type": "string"
},
"Personality": {
"enum": [
"none",
"friendly",
"pragmatic"
],
"type": "string"
},
"ReadOnlyAccess": {
"oneOf": [
{
"properties": {
"includePlatformDefaults": {
"default": true,
"type": "boolean"
},
"readableRoots": {
"default": [],
"items": {
"$ref": "#/definitions/AbsolutePathBuf"
},
"type": "array"
},
"type": {
"enum": [
"restricted"
],
"title": "RestrictedReadOnlyAccessType",
"type": "string"
}
},
"required": [
"type"
],
"title": "RestrictedReadOnlyAccess",
"type": "object"
},
{
"properties": {
"type": {
"enum": [
"fullAccess"
],
"title": "FullAccessReadOnlyAccessType",
"type": "string"
}
},
"required": [
"type"
],
"title": "FullAccessReadOnlyAccess",
"type": "object"
}
]
},
"ReasoningEffort": {
"description": "See https://platform.openai.com/docs/guides/reasoning?api-mode=responses#get-started-with-reasoning",
"enum": [
"none",
"minimal",
"low",
"medium",
"high",
"xhigh"
],
"type": "string"
},
"ReasoningSummary": {
"description": "A summary of the reasoning performed by the model. This can be useful for debugging and understanding the model's reasoning process. See https://platform.openai.com/docs/guides/reasoning?api-mode=responses#reasoning-summaries",
"oneOf": [
{
"enum": [
"auto",
"concise",
"detailed"
],
"type": "string"
},
{
"description": "Option to disable reasoning summaries.",
"enum": [
"none"
],
"type": "string"
}
]
},
"SandboxPolicy": {
"oneOf": [
{
"properties": {
"type": {
"enum": [
"dangerFullAccess"
],
"title": "DangerFullAccessSandboxPolicyType",
"type": "string"
}
},
"required": [
"type"
],
"title": "DangerFullAccessSandboxPolicy",
"type": "object"
},
{
"properties": {
"access": {
"allOf": [
{
"$ref": "#/definitions/ReadOnlyAccess"
}
],
"default": {
"type": "fullAccess"
}
},
"type": {
"enum": [
"readOnly"
],
"title": "ReadOnlySandboxPolicyType",
"type": "string"
}
},
"required": [
"type"
],
"title": "ReadOnlySandboxPolicy",
"type": "object"
},
{
"properties": {
"networkAccess": {
"allOf": [
{
"$ref": "#/definitions/NetworkAccess"
}
],
"default": "restricted"
},
"type": {
"enum": [
"externalSandbox"
],
"title": "ExternalSandboxSandboxPolicyType",
"type": "string"
}
},
"required": [
"type"
],
"title": "ExternalSandboxSandboxPolicy",
"type": "object"
},
{
"properties": {
"excludeSlashTmp": {
"default": false,
"type": "boolean"
},
"excludeTmpdirEnvVar": {
"default": false,
"type": "boolean"
},
"networkAccess": {
"default": false,
"type": "boolean"
},
"readOnlyAccess": {
"allOf": [
{
"$ref": "#/definitions/ReadOnlyAccess"
}
],
"default": {
"type": "fullAccess"
}
},
"type": {
"enum": [
"workspaceWrite"
],
"title": "WorkspaceWriteSandboxPolicyType",
"type": "string"
},
"writableRoots": {
"default": [],
"items": {
"$ref": "#/definitions/AbsolutePathBuf"
},
"type": "array"
}
},
"required": [
"type"
],
"title": "WorkspaceWriteSandboxPolicy",
"type": "object"
}
]
},
"Settings": {
"description": "Settings for a collaboration mode.",
"properties": {
"developer_instructions": {
"type": [
"string",
"null"
]
},
"model": {
"type": "string"
},
"reasoning_effort": {
"anyOf": [
{
"$ref": "#/definitions/ReasoningEffort"
},
{
"type": "null"
}
]
}
},
"required": [
"model"
],
"type": "object"
},
"TextElement": {
"properties": {
"byteRange": {
"allOf": [
{
"$ref": "#/definitions/ByteRange"
}
],
"description": "Byte range in the parent `text` buffer that this element occupies."
},
"placeholder": {
"description": "Optional human-readable placeholder for the element, displayed in the UI.",
"type": [
"string",
"null"
]
}
},
"required": [
"byteRange"
],
"type": "object"
},
"UserInput": {
"oneOf": [
{
"properties": {
"text": {
"type": "string"
},
"text_elements": {
"default": [],
"description": "UI-defined spans within `text` used to render or persist special elements.",
"items": {
"$ref": "#/definitions/TextElement"
},
"type": "array"
},
"type": {
"enum": [
"text"
],
"title": "TextUserInputType",
"type": "string"
}
},
"required": [
"text",
"type"
],
"title": "TextUserInput",
"type": "object"
},
{
"properties": {
"type": {
"enum": [
"image"
],
"title": "ImageUserInputType",
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"type",
"url"
],
"title": "ImageUserInput",
"type": "object"
},
{
"properties": {
"path": {
"type": "string"
},
"type": {
"enum": [
"localImage"
],
"title": "LocalImageUserInputType",
"type": "string"
}
},
"required": [
"path",
"type"
],
"title": "LocalImageUserInput",
"type": "object"
},
{
"properties": {
"name": {
"type": "string"
},
"path": {
"type": "string"
},
"type": {
"enum": [
"skill"
],
"title": "SkillUserInputType",
"type": "string"
}
},
"required": [
"name",
"path",
"type"
],
"title": "SkillUserInput",
"type": "object"
},
{
"properties": {
"name": {
"type": "string"
},
"path": {
"type": "string"
},
"type": {
"enum": [
"mention"
],
"title": "MentionUserInputType",
"type": "string"
}
},
"required": [
"name",
"path",
"type"
],
"title": "MentionUserInput",
"type": "object"
}
]
}
},
"properties": {
"approvalPolicy": {
"anyOf": [
{
"$ref": "#/definitions/AskForApproval"
},
{
"type": "null"
}
],
"description": "Override the approval policy for this turn and subsequent turns."
},
"cwd": {
"description": "Override the working directory for this turn and subsequent turns.",
"type": [
"string",
"null"
]
},
"effort": {
"anyOf": [
{
"$ref": "#/definitions/ReasoningEffort"
},
{
"type": "null"
}
],
"description": "Override the reasoning effort for this turn and subsequent turns."
},
"input": {
"items": {
"$ref": "#/definitions/UserInput"
},
"type": "array"
},
"model": {
"description": "Override the model for this turn and subsequent turns.",
"type": [
"string",
"null"
]
},
"outputSchema": {
"description": "Optional JSON Schema used to constrain the final assistant message for this turn."
},
"personality": {
"anyOf": [
{
"$ref": "#/definitions/Personality"
},
{
"type": "null"
}
],
"description": "Override the personality for this turn and subsequent turns."
},
"sandboxPolicy": {
"anyOf": [
{
"$ref": "#/definitions/SandboxPolicy"
},
{
"type": "null"
}
],
"description": "Override the sandbox policy for this turn and subsequent turns."
},
"summary": {
"anyOf": [
{
"$ref": "#/definitions/ReasoningSummary"
},
{
"type": "null"
}
],
"description": "Override the reasoning summary for this turn and subsequent turns."
},
"threadId": {
"type": "string"
}
},
"required": [
"input",
"threadId"
],
"title": "TurnStartParams",
"type": "object"
}