Add PermissionRequest hooks support (#17563)

## Why

We need `PermissionRequest` hook support!

Also addresses:
- https://github.com/openai/codex/issues/16301
- run a script on Hook to do things like play a sound to draw attention
but actually no-op so user can still approve
- can omit the `decision` object from output or just have the script
exit 0 and print nothing
- https://github.com/openai/codex/issues/15311
  - let the script approve/deny on its own
  - external UI what will run on Hook and relay decision back to codex


## Reviewer Note

There's a lot of plumbing for the new hook, key files to review are:
- New hook added in `codex-rs/hooks/src/events/permission_request.rs`
- Wiring for network approvals
`codex-rs/core/src/tools/network_approval.rs`
- Wiring for tool orchestrator `codex-rs/core/src/tools/orchestrator.rs`
- Wiring for execve
`codex-rs/core/src/tools/runtimes/shell/unix_escalation.rs`

## What

- Wires shell, unified exec, and network approval prompts into the
`PermissionRequest` hook flow.
- Lets hooks allow or deny approval prompts; quiet or invalid hooks fall
back to the normal approval path.
- Uses `tool_input.description` for user-facing context when it helps:
  - shell / `exec_command`: the request justification, when present
  - network approvals: `network-access <domain>`
- Uses `tool_name: Bash` for shell, unified exec, and network approval
permission-request hooks.
- For network approvals, passes the originating command in
`tool_input.command` when there is a single owning call; otherwise falls
back to the synthetic `network-access ...` command.

<details>
<summary>Example `PermissionRequest` hook input for a shell
approval</summary>

```json
{
  "session_id": "<session-id>",
  "turn_id": "<turn-id>",
  "transcript_path": "/path/to/transcript.jsonl",
  "cwd": "/path/to/cwd",
  "hook_event_name": "PermissionRequest",
  "model": "gpt-5",
  "permission_mode": "default",
  "tool_name": "Bash",
  "tool_input": {
    "command": "rm -f /tmp/example"
  }
}
```

</details>

<details>
<summary>Example `PermissionRequest` hook input for an escalated
`exec_command` request</summary>

```json
{
  "session_id": "<session-id>",
  "turn_id": "<turn-id>",
  "transcript_path": "/path/to/transcript.jsonl",
  "cwd": "/path/to/cwd",
  "hook_event_name": "PermissionRequest",
  "model": "gpt-5",
  "permission_mode": "default",
  "tool_name": "Bash",
  "tool_input": {
    "command": "cp /tmp/source.json /Users/alice/export/source.json",
    "description": "Need to copy a generated file outside the workspace"
  }
}
```

</details>

<details>
<summary>Example `PermissionRequest` hook input for a network
approval</summary>

```json
{
  "session_id": "<session-id>",
  "turn_id": "<turn-id>",
  "transcript_path": "/path/to/transcript.jsonl",
  "cwd": "/path/to/cwd",
  "hook_event_name": "PermissionRequest",
  "model": "gpt-5",
  "permission_mode": "default",
  "tool_name": "Bash",
  "tool_input": {
    "command": "curl http://codex-network-test.invalid",
    "description": "network-access http://codex-network-test.invalid"
  }
}
```

</details>

## Follow-ups

- Implement the `PermissionRequest` semantics for `updatedInput`,
`updatedPermissions`, `interrupt`, and suggestions /
`permission_suggestions`
- Add `PermissionRequest` support for the `request_permissions` tool
path

---------

Co-authored-by: Codex <noreply@openai.com>

codex-rs/analytics/src/events.rs

@@ -567,6 +567,7 @@ pub(crate) fn codex_hook_run_metadata(
 fn analytics_hook_event_name(event_name: HookEventName) -> &'static str {
     match event_name {
         HookEventName::PreToolUse => "PreToolUse",
+        HookEventName::PermissionRequest => "PermissionRequest",
         HookEventName::PostToolUse => "PostToolUse",
         HookEventName::SessionStart => "SessionStart",
         HookEventName::UserPromptSubmit => "UserPromptSubmit",

codex-rs/app-server-protocol/schema/json/ServerNotification.json

@@ -1407,6 +1407,7 @@
     "HookEventName": {
       "enum": [
         "preToolUse",
+        "permissionRequest",
         "postToolUse",
         "sessionStart",
         "userPromptSubmit",

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -8509,6 +8509,7 @@
       "HookEventName": {
         "enum": [
           "preToolUse",
+          "permissionRequest",
           "postToolUse",
           "sessionStart",
           "userPromptSubmit",

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json

@@ -5217,6 +5217,7 @@
     "HookEventName": {
       "enum": [
         "preToolUse",
+        "permissionRequest",
         "postToolUse",
         "sessionStart",
         "userPromptSubmit",

codex-rs/app-server-protocol/schema/json/v2/HookCompletedNotification.json

@@ -8,6 +8,7 @@
     "HookEventName": {
       "enum": [
         "preToolUse",
+        "permissionRequest",
         "postToolUse",
         "sessionStart",
         "userPromptSubmit",

codex-rs/app-server-protocol/schema/json/v2/HookStartedNotification.json

@@ -8,6 +8,7 @@
     "HookEventName": {
       "enum": [
         "preToolUse",
+        "permissionRequest",
         "postToolUse",
         "sessionStart",
         "userPromptSubmit",

codex-rs/app-server-protocol/schema/typescript/v2/HookEventName.ts

@@ -2,4 +2,4 @@
 
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
 
-export type HookEventName = "preToolUse" | "postToolUse" | "sessionStart" | "userPromptSubmit" | "stop";
+export type HookEventName = "preToolUse" | "permissionRequest" | "postToolUse" | "sessionStart" | "userPromptSubmit" | "stop";

codex-rs/app-server-protocol/src/protocol/v2.rs

@@ -381,7 +381,7 @@ v2_enum_from_core!(
 
 v2_enum_from_core!(
     pub enum HookEventName from CoreHookEventName {
-        PreToolUse, PostToolUse, SessionStart, UserPromptSubmit, Stop
+        PreToolUse, PermissionRequest, PostToolUse, SessionStart, UserPromptSubmit, Stop
     }
 );
 

codex-rs/core/src/hook_runtime.rs

@@ -4,6 +4,9 @@ use std::time::Duration;
 
 use codex_analytics::HookRunFact;
 use codex_analytics::build_track_events_context;
+use codex_hooks::PermissionRequestDecision;
+use codex_hooks::PermissionRequestOutcome;
+use codex_hooks::PermissionRequestRequest;
 use codex_hooks::PostToolUseOutcome;
 use codex_hooks::PostToolUseRequest;
 use codex_hooks::PreToolUseOutcome;
@@ -31,6 +34,7 @@ use serde_json::Value;
 use crate::codex::Session;
 use crate::codex::TurnContext;
 use crate::event_mapping::parse_turn_item;
+use crate::tools::sandboxing::PermissionRequestPayload;
 
 pub(crate) struct HookRuntimeOutcome {
     pub should_stop: bool,
@@ -153,6 +157,39 @@ pub(crate) async fn run_pre_tool_use_hooks(
     if should_block { block_reason } else { None }
 }
 
+// PermissionRequest hooks share the same preview/start/completed event flow as
+// other hook types, but they return an optional decision instead of mutating
+// tool input or post-run state.
+pub(crate) async fn run_permission_request_hooks(
+    sess: &Arc<Session>,
+    turn_context: &Arc<TurnContext>,
+    run_id_suffix: &str,
+    payload: PermissionRequestPayload,
+) -> Option<PermissionRequestDecision> {
+    let request = PermissionRequestRequest {
+        session_id: sess.conversation_id,
+        turn_id: turn_context.sub_id.clone(),
+        cwd: turn_context.cwd.to_path_buf(),
+        transcript_path: sess.hook_transcript_path().await,
+        model: turn_context.model_info.slug.clone(),
+        permission_mode: hook_permission_mode(turn_context),
+        tool_name: payload.tool_name,
+        run_id_suffix: run_id_suffix.to_string(),
+        command: payload.command,
+        description: payload.description,
+    };
+    let preview_runs = sess.hooks().preview_permission_request(&request);
+    emit_hook_started_events(sess, turn_context, preview_runs).await;
+
+    let PermissionRequestOutcome {
+        hook_events,
+        decision,
+    } = sess.hooks().run_permission_request(request).await;
+    emit_hook_completed_events(sess, turn_context, hook_events).await;
+
+    decision
+}
+
 pub(crate) async fn run_post_tool_use_hooks(
     sess: &Arc<Session>,
     turn_context: &Arc<TurnContext>,
@@ -390,6 +427,7 @@ fn hook_run_analytics_payload(
 fn hook_run_metric_tags(run: &HookRunSummary) -> [(&'static str, &'static str); 3] {
     let hook_name = match run.event_name {
         HookEventName::PreToolUse => "PreToolUse",
+        HookEventName::PermissionRequest => "PermissionRequest",
         HookEventName::PostToolUse => "PostToolUse",
         HookEventName::SessionStart => "SessionStart",
         HookEventName::UserPromptSubmit => "UserPromptSubmit",

codex-rs/core/src/tools/handlers/shell.rs

@@ -77,6 +77,7 @@ fn shell_command_payload_command(payload: &ToolPayload) -> Option<String> {
 struct RunExecLikeArgs {
     tool_name: String,
     exec_params: ExecParams,
+    hook_command: String,
     additional_permissions: Option<PermissionProfile>,
     prefix_rule: Option<Vec<String>>,
     session: Arc<crate::codex::Session>,
@@ -241,6 +242,7 @@ impl ToolHandler for ShellHandler {
                 Self::run_exec_like(RunExecLikeArgs {
                     tool_name: tool_name.display(),
                     exec_params,
+                    hook_command: codex_shell_command::parse_command::shlex_join(&params.command),
                     additional_permissions: params.additional_permissions.clone(),
                     prefix_rule,
                     session,
@@ -258,6 +260,7 @@ impl ToolHandler for ShellHandler {
                 Self::run_exec_like(RunExecLikeArgs {
                     tool_name: tool_name.display(),
                     exec_params,
+                    hook_command: codex_shell_command::parse_command::shlex_join(&params.command),
                     additional_permissions: None,
                     prefix_rule: None,
                     session,
@@ -366,6 +369,7 @@ impl ToolHandler for ShellCommandHandler {
         ShellHandler::run_exec_like(RunExecLikeArgs {
             tool_name: tool_name.display(),
             exec_params,
+            hook_command: params.command,
             additional_permissions: params.additional_permissions.clone(),
             prefix_rule,
             session,
@@ -384,6 +388,7 @@ impl ShellHandler {
         let RunExecLikeArgs {
             tool_name,
             exec_params,
+            hook_command,
             additional_permissions,
             prefix_rule,
             session,
@@ -514,6 +519,7 @@ impl ShellHandler {
 
         let req = ShellRequest {
             command: exec_params.command.clone(),
+            hook_command,
             cwd: exec_params.cwd.clone(),
             timeout_ms: exec_params.expiration.timeout_ms(),
             env: exec_params.env.clone(),

codex-rs/core/src/tools/handlers/unified_exec.rs

@@ -317,6 +317,7 @@ impl ToolHandler for UnifiedExecHandler {
                     .exec_command(
                         ExecCommandRequest {
                             command,
+                            hook_command: args.cmd,
                             process_id,
                             yield_time_ms,
                             max_output_tokens,

codex-rs/core/src/tools/network_approval.rs

@@ -5,8 +5,11 @@ use crate::guardian::guardian_timeout_message;
 use crate::guardian::new_guardian_review_id;
 use crate::guardian::review_approval_request;
 use crate::guardian::routes_approval_to_guardian;
+use crate::hook_runtime::run_permission_request_hooks;
 use crate::network_policy_decision::denied_network_policy_message;
+use crate::tools::sandboxing::PermissionRequestPayload;
 use crate::tools::sandboxing::ToolError;
+use codex_hooks::PermissionRequestDecision;
 use codex_network_proxy::BlockedRequest;
 use codex_network_proxy::BlockedRequestObserver;
 use codex_network_proxy::NetworkDecision;
@@ -43,6 +46,7 @@ pub(crate) enum NetworkApprovalMode {
 pub(crate) struct NetworkApprovalSpec {
     pub network: Option<NetworkProxy>,
     pub mode: NetworkApprovalMode,
+    pub command: String,
 }
 
 #[derive(Clone, Debug)]
@@ -172,6 +176,7 @@ impl PendingHostApproval {
 struct ActiveNetworkApprovalCall {
     registration_id: String,
     turn_id: String,
+    command: String,
 }
 
 pub(crate) struct NetworkApprovalService {
@@ -204,7 +209,7 @@ impl NetworkApprovalService {
         other_approved_hosts.extend(approved_hosts.iter().cloned());
     }
 
-    async fn register_call(&self, registration_id: String, turn_id: String) {
+    async fn register_call(&self, registration_id: String, turn_id: String, command: String) {
         let mut active_calls = self.active_calls.lock().await;
         let key = registration_id.clone();
         active_calls.insert(
@@ -212,6 +217,7 @@ impl NetworkApprovalService {
             Arc::new(ActiveNetworkApprovalCall {
                 registration_id,
                 turn_id,
+                command,
             }),
         );
     }
@@ -371,6 +377,46 @@ impl NetworkApprovalService {
         };
         let owner_call = self.resolve_single_active_call().await;
         let guardian_approval_id = Self::approval_id_for_key(&key);
+        let prompt_command = vec!["network-access".to_string(), target.clone()];
+        let command = owner_call
+            .as_ref()
+            .map_or_else(|| prompt_command.join(" "), |call| call.command.clone());
+        if let Some(permission_request_decision) = run_permission_request_hooks(
+            &session,
+            &turn_context,
+            &guardian_approval_id,
+            PermissionRequestPayload {
+                tool_name: "Bash".to_string(),
+                command,
+                description: Some(format!("network-access {target}")),
+            },
+        )
+        .await
+        {
+            match permission_request_decision {
+                PermissionRequestDecision::Allow => {
+                    pending
+                        .set_decision(PendingApprovalDecision::AllowOnce)
+                        .await;
+                    let mut pending_approvals = self.pending_host_approvals.lock().await;
+                    pending_approvals.remove(&key);
+                    return NetworkDecision::Allow;
+                }
+                PermissionRequestDecision::Deny { message } => {
+                    if let Some(owner_call) = owner_call.as_ref() {
+                        self.record_call_outcome(
+                            &owner_call.registration_id,
+                            NetworkApprovalOutcome::DeniedByPolicy(message),
+                        )
+                        .await;
+                    }
+                    pending.set_decision(PendingApprovalDecision::Deny).await;
+                    let mut pending_approvals = self.pending_host_approvals.lock().await;
+                    pending_approvals.remove(&key);
+                    return NetworkDecision::deny(REASON_NOT_ALLOWED);
+                }
+            }
+        }
         let use_guardian = routes_approval_to_guardian(&turn_context);
         let guardian_review_id = use_guardian.then(new_guardian_review_id);
         let approval_decision = if let Some(review_id) = guardian_review_id.clone() {
@@ -392,13 +438,11 @@ impl NetworkApprovalService {
             )
             .await
         } else {
-            let approval_id = Self::approval_id_for_key(&key);
-            let prompt_command = vec!["network-access".to_string(), target.clone()];
             let available_decisions = None;
             session
                 .request_command_approval(
                     turn_context.as_ref(),
-                    approval_id,
+                    guardian_approval_id,
                     /*approval_id*/ None,
                     prompt_command,
                     turn_context.cwd.clone(),
@@ -590,7 +634,7 @@ pub(crate) async fn begin_network_approval(
     session
         .services
         .network_approval
-        .register_call(registration_id.clone(), turn_id.to_string())
+        .register_call(registration_id.clone(), turn_id.to_string(), spec.command)
         .await;
 
     Some(ActiveNetworkApproval {

codex-rs/core/src/tools/network_approval_tests.rs

@@ -211,7 +211,11 @@ fn denied_blocked_request(host: &str) -> BlockedRequest {
 async fn record_blocked_request_sets_policy_outcome_for_owner_call() {
     let service = NetworkApprovalService::default();
     service
-        .register_call("registration-1".to_string(), "turn-1".to_string())
+        .register_call(
+            "registration-1".to_string(),
+            "turn-1".to_string(),
+            "curl http://example.com".to_string(),
+        )
         .await;
 
     service
@@ -230,7 +234,11 @@ async fn record_blocked_request_sets_policy_outcome_for_owner_call() {
 async fn blocked_request_policy_does_not_override_user_denial_outcome() {
     let service = NetworkApprovalService::default();
     service
-        .register_call("registration-1".to_string(), "turn-1".to_string())
+        .register_call(
+            "registration-1".to_string(),
+            "turn-1".to_string(),
+            "curl http://example.com".to_string(),
+        )
         .await;
 
     service
@@ -250,10 +258,18 @@ async fn blocked_request_policy_does_not_override_user_denial_outcome() {
 async fn record_blocked_request_ignores_ambiguous_unattributed_blocked_requests() {
     let service = NetworkApprovalService::default();
     service
-        .register_call("registration-1".to_string(), "turn-1".to_string())
+        .register_call(
+            "registration-1".to_string(),
+            "turn-1".to_string(),
+            "curl http://example.com".to_string(),
+        )
         .await;
     service
-        .register_call("registration-2".to_string(), "turn-1".to_string())
+        .register_call(
+            "registration-2".to_string(),
+            "turn-1".to_string(),
+            "gh api /foo".to_string(),
+        )
         .await;
 
     service

codex-rs/core/src/tools/orchestrator.rs

@@ -10,6 +10,7 @@ use crate::guardian::guardian_rejection_message;
 use crate::guardian::guardian_timeout_message;
 use crate::guardian::new_guardian_review_id;
 use crate::guardian::routes_approval_to_guardian;
+use crate::hook_runtime::run_permission_request_hooks;
 use crate::network_policy_decision::network_approval_context_from_payload;
 use crate::tools::network_approval::DeferredNetworkApproval;
 use crate::tools::network_approval::NetworkApprovalMode;
@@ -24,6 +25,7 @@ use crate::tools::sandboxing::ToolCtx;
 use crate::tools::sandboxing::ToolError;
 use crate::tools::sandboxing::ToolRuntime;
 use crate::tools::sandboxing::default_exec_approval_requirement;
+use codex_hooks::PermissionRequestDecision;
 use codex_otel::ToolDecisionSource;
 use codex_protocol::error::CodexErr;
 use codex_protocol::error::SandboxErr;
@@ -114,9 +116,6 @@ impl ToolOrchestrator {
         let otel = turn_ctx.session_telemetry.clone();
         let otel_tn = &tool_ctx.tool_name;
         let otel_ci = &tool_ctx.call_id;
-        let otel_user = ToolDecisionSource::User;
-        let otel_automated_reviewer = ToolDecisionSource::AutomatedReviewer;
-        let otel_cfg = ToolDecisionSource::Config;
         let use_guardian = routes_approval_to_guardian(turn_ctx);
 
         // 1) Approval
@@ -127,7 +126,12 @@ impl ToolOrchestrator {
         });
         match requirement {
             ExecApprovalRequirement::Skip { .. } => {
-                otel.tool_decision(otel_tn, otel_ci, &ReviewDecision::Approved, otel_cfg);
+                otel.tool_decision(
+                    otel_tn,
+                    otel_ci,
+                    &ReviewDecision::Approved,
+                    ToolDecisionSource::Config,
+                );
             }
             ExecApprovalRequirement::Forbidden { reason } => {
                 return Err(ToolError::Rejected(reason));
@@ -142,14 +146,16 @@ impl ToolOrchestrator {
                     retry_reason: reason,
                     network_approval_context: None,
                 };
-                let decision = tool.start_approval_async(req, approval_ctx).await;
-                let otel_source = if use_guardian {
-                    otel_automated_reviewer.clone()
-                } else {
-                    otel_user.clone()
-                };
-
-                otel.tool_decision(otel_tn, otel_ci, &decision, otel_source);
+                let decision = Self::request_approval(
+                    tool,
+                    req,
+                    tool_ctx.call_id.as_str(),
+                    approval_ctx,
+                    tool_ctx,
+                    use_guardian,
+                    &otel,
+                )
+                .await?;
 
                 match decision {
                     ReviewDecision::Denied | ReviewDecision::Abort => {
@@ -296,13 +302,17 @@ impl ToolOrchestrator {
                         network_approval_context: network_approval_context.clone(),
                     };
 
-                    let decision = tool.start_approval_async(req, approval_ctx).await;
-                    let otel_source = if use_guardian {
-                        otel_automated_reviewer
-                    } else {
-                        otel_user
-                    };
-                    otel.tool_decision(otel_tn, otel_ci, &decision, otel_source);
+                    let permission_request_run_id = format!("{}:retry", tool_ctx.call_id);
+                    let decision = Self::request_approval(
+                        tool,
+                        req,
+                        &permission_request_run_id,
+                        approval_ctx,
+                        tool_ctx,
+                        use_guardian,
+                        &otel,
+                    )
+                    .await?;
 
                     match decision {
                         ReviewDecision::Denied | ReviewDecision::Abort => {
@@ -365,6 +375,69 @@ impl ToolOrchestrator {
             Err(err) => Err(err),
         }
     }
+
+    // PermissionRequest hooks take top precedence for answering approval
+    // prompts. If no matching hook returns a decision, fall back to the
+    // normal guardian or user approval path.
+    async fn request_approval<Rq, Out, T>(
+        tool: &mut T,
+        req: &Rq,
+        permission_request_run_id: &str,
+        approval_ctx: ApprovalCtx<'_>,
+        tool_ctx: &ToolCtx,
+        use_guardian: bool,
+        otel: &codex_otel::SessionTelemetry,
+    ) -> Result<ReviewDecision, ToolError>
+    where
+        T: ToolRuntime<Rq, Out>,
+    {
+        if let Some(permission_request) = tool.permission_request_payload(req) {
+            match run_permission_request_hooks(
+                approval_ctx.session,
+                approval_ctx.turn,
+                permission_request_run_id,
+                permission_request,
+            )
+            .await
+            {
+                Some(PermissionRequestDecision::Allow) => {
+                    let decision = ReviewDecision::Approved;
+                    otel.tool_decision(
+                        &tool_ctx.tool_name,
+                        &tool_ctx.call_id,
+                        &decision,
+                        ToolDecisionSource::Config,
+                    );
+                    return Ok(decision);
+                }
+                Some(PermissionRequestDecision::Deny { message }) => {
+                    let decision = ReviewDecision::Denied;
+                    otel.tool_decision(
+                        &tool_ctx.tool_name,
+                        &tool_ctx.call_id,
+                        &decision,
+                        ToolDecisionSource::Config,
+                    );
+                    return Err(ToolError::Rejected(message));
+                }
+                None => {}
+            }
+        }
+
+        let decision = tool.start_approval_async(req, approval_ctx).await;
+        let otel_source = if use_guardian {
+            ToolDecisionSource::AutomatedReviewer
+        } else {
+            ToolDecisionSource::User
+        };
+        otel.tool_decision(
+            &tool_ctx.tool_name,
+            &tool_ctx.call_id,
+            &decision,
+            otel_source,
+        );
+        Ok(decision)
+    }
 }
 
 fn build_denial_reason_from_output(_output: &ExecToolCallOutput) -> String {

codex-rs/core/src/tools/runtimes/shell.rs

@@ -23,6 +23,7 @@ use crate::tools::runtimes::maybe_wrap_shell_lc_with_snapshot;
 use crate::tools::sandboxing::Approvable;
 use crate::tools::sandboxing::ApprovalCtx;
 use crate::tools::sandboxing::ExecApprovalRequirement;
+use crate::tools::sandboxing::PermissionRequestPayload;
 use crate::tools::sandboxing::SandboxAttempt;
 use crate::tools::sandboxing::SandboxOverride;
 use crate::tools::sandboxing::Sandboxable;
@@ -44,6 +45,7 @@ use std::collections::HashMap;
 #[derive(Clone, Debug)]
 pub struct ShellRequest {
     pub command: Vec<String>,
+    pub hook_command: String,
     pub cwd: AbsolutePathBuf,
     pub timeout_ms: Option<u64>,
     pub env: HashMap<String, String>,
@@ -197,6 +199,14 @@ impl Approvable<ShellRequest> for ShellRuntime {
         Some(req.exec_approval_requirement.clone())
     }
 
+    fn permission_request_payload(&self, req: &ShellRequest) -> Option<PermissionRequestPayload> {
+        Some(PermissionRequestPayload {
+            tool_name: "Bash".to_string(),
+            command: req.hook_command.clone(),
+            description: req.justification.clone(),
+        })
+    }
+
     fn sandbox_mode_for_first_attempt(&self, req: &ShellRequest) -> SandboxOverride {
         sandbox_override_for_first_attempt(req.sandbox_permissions, &req.exec_approval_requirement)
     }
@@ -212,6 +222,7 @@ impl ToolRuntime<ShellRequest, ExecToolCallOutput> for ShellRuntime {
         Some(NetworkApprovalSpec {
             network: req.network.clone(),
             mode: NetworkApprovalMode::Immediate,
+            command: req.hook_command.clone(),
         })
     }
 

codex-rs/core/src/tools/runtimes/shell/unix_escalation.rs

@@ -8,11 +8,13 @@ use crate::guardian::guardian_timeout_message;
 use crate::guardian::new_guardian_review_id;
 use crate::guardian::review_approval_request;
 use crate::guardian::routes_approval_to_guardian;
+use crate::hook_runtime::run_permission_request_hooks;
 use crate::sandboxing::ExecOptions;
 use crate::sandboxing::ExecRequest;
 use crate::sandboxing::SandboxPermissions;
 use crate::shell::ShellType;
 use crate::tools::runtimes::build_sandbox_command;
+use crate::tools::sandboxing::PermissionRequestPayload;
 use crate::tools::sandboxing::SandboxAttempt;
 use crate::tools::sandboxing::ToolCtx;
 use crate::tools::sandboxing::ToolError;
@@ -22,6 +24,7 @@ use codex_execpolicy::MatchOptions;
 use codex_execpolicy::Policy;
 use codex_execpolicy::RuleMatch;
 use codex_features::Feature;
+use codex_hooks::PermissionRequestDecision;
 use codex_protocol::config_types::WindowsSandboxLevel;
 use codex_protocol::error::CodexErr;
 use codex_protocol::error::SandboxErr;
@@ -321,6 +324,7 @@ enum DecisionSource {
 struct PromptDecision {
     decision: ReviewDecision,
     guardian_review_id: Option<String>,
+    rejection_message: Option<String>,
 }
 
 fn execve_prompt_is_rejected_by_policy(
@@ -395,11 +399,44 @@ impl CoreShellActionProvider {
         let guardian_review_id = routes_approval_to_guardian(&turn).then(new_guardian_review_id);
         Ok(stopwatch
             .pause_for(async move {
+                // 1) Run PermissionRequest hooks
+                let permission_request = PermissionRequestPayload {
+                    tool_name: "Bash".to_string(),
+                    command: codex_shell_command::parse_command::shlex_join(&command),
+                    description: None,
+                };
+                let effective_approval_id = approval_id.clone().unwrap_or_else(|| call_id.clone());
+                match run_permission_request_hooks(
+                    &session,
+                    &turn,
+                    &effective_approval_id,
+                    permission_request,
+                )
+                .await
+                {
+                    Some(PermissionRequestDecision::Allow) => {
+                        return PromptDecision {
+                            decision: ReviewDecision::Approved,
+                            guardian_review_id: None,
+                            rejection_message: None,
+                        };
+                    }
+                    Some(PermissionRequestDecision::Deny { message }) => {
+                        return PromptDecision {
+                            decision: ReviewDecision::Denied,
+                            guardian_review_id: None,
+                            rejection_message: Some(message),
+                        };
+                    }
+                    None => {}
+                }
+
+                // 2) Route to Guardian if configured
                 if let Some(review_id) = guardian_review_id.clone() {
                     let decision = review_approval_request(
                         &session,
                         &turn,
-                        review_id,
+                        review_id.clone(),
                         GuardianApprovalRequest::Execve {
                             id: call_id.clone(),
                             source,
@@ -414,8 +451,11 @@ impl CoreShellActionProvider {
                     return PromptDecision {
                         decision,
                         guardian_review_id,
+                        rejection_message: None,
                     };
                 }
+
+                // 3) Fall back to regular user prompt
                 let decision = session
                     .request_command_approval(
                         &turn,
@@ -433,6 +473,7 @@ impl CoreShellActionProvider {
                 PromptDecision {
                     decision,
                     guardian_review_id: None,
+                    rejection_message: None,
                 }
             })
             .await)
@@ -488,7 +529,11 @@ impl CoreShellActionProvider {
                             }
                         },
                         ReviewDecision::Denied => {
-                            let message = if let Some(review_id) =
+                            let message = if let Some(message) =
+                                prompt_decision.rejection_message.clone()
+                            {
+                                message
+                            } else if let Some(review_id) =
                                 prompt_decision.guardian_review_id.as_deref()
                             {
                                 guardian_rejection_message(self.session.as_ref(), review_id).await

codex-rs/core/src/tools/runtimes/shell/unix_escalation_tests.rs

@@ -6,11 +6,16 @@ use super::evaluate_intercepted_exec_policy;
 use super::extract_shell_script;
 use super::join_program_and_argv;
 use super::map_exec_result;
+use crate::codex::make_session_and_context;
+use crate::config::Constrained;
 use crate::sandboxing::SandboxPermissions;
+use anyhow::Context;
 use codex_execpolicy::Decision;
 use codex_execpolicy::Evaluation;
 use codex_execpolicy::PolicyParser;
 use codex_execpolicy::RuleMatch;
+use codex_hooks::Hooks;
+use codex_hooks::HooksConfig;
 use codex_protocol::models::FileSystemPermissions;
 use codex_protocol::models::PermissionProfile;
 use codex_protocol::permissions::FileSystemAccessMode;
@@ -21,6 +26,7 @@ use codex_protocol::permissions::FileSystemSpecialPath;
 use codex_protocol::permissions::NetworkSandboxPolicy;
 use codex_protocol::protocol::AskForApproval;
 use codex_protocol::protocol::GranularApprovalConfig;
+use codex_protocol::protocol::GuardianCommandSource;
 use codex_protocol::protocol::ReadOnlyAccess;
 use codex_protocol::protocol::SandboxPolicy;
 use codex_sandboxing::SandboxType;
@@ -30,8 +36,10 @@ use codex_shell_escalation::ExecResult;
 use codex_shell_escalation::Permissions as EscalatedPermissions;
 use codex_utils_absolute_path::AbsolutePathBuf;
 use pretty_assertions::assert_eq;
+use serde_json::Value;
 use std::path::PathBuf;
 use std::time::Duration;
+use tokio::sync::RwLock;
 
 fn host_absolute_path(segments: &[&str]) -> String {
     let mut path = if cfg!(windows) {
@@ -319,6 +327,134 @@ fn shell_request_escalation_execution_is_explicit() {
     );
 }
 
+#[tokio::test(flavor = "current_thread")]
+async fn execve_permission_request_hook_short_circuits_prompt() -> anyhow::Result<()> {
+    let (mut session, mut turn_context) = make_session_and_context().await;
+    std::fs::create_dir_all(&turn_context.config.codex_home)
+        .context("recreate codex home for hook fixtures")?;
+    let script_path = turn_context
+        .config
+        .codex_home
+        .join("permission_request_hook.py");
+    let log_path = turn_context
+        .config
+        .codex_home
+        .join("permission_request_hook_log.jsonl");
+    std::fs::write(
+        &script_path,
+        format!(
+            "#!/bin/sh\ncat > {log_path}\nprintf '%s\\n' '{response}'\n",
+            log_path = shlex::try_quote(log_path.to_string_lossy().as_ref())?,
+            response = "{\"hookSpecificOutput\":{\"hookEventName\":\"PermissionRequest\",\"decision\":{\"behavior\":\"allow\"}}}",
+        ),
+    )
+    .with_context(|| format!("write hook script to {}", script_path.display()))?;
+    #[cfg(unix)]
+    {
+        use std::os::unix::fs::PermissionsExt;
+
+        let mut permissions = std::fs::metadata(&script_path)
+            .with_context(|| format!("read hook script metadata from {}", script_path.display()))?
+            .permissions();
+        permissions.set_mode(0o755);
+        std::fs::set_permissions(&script_path, permissions)
+            .with_context(|| format!("set hook script permissions on {}", script_path.display()))?;
+    }
+    std::fs::write(
+        turn_context.config.codex_home.join("hooks.json"),
+        serde_json::json!({
+            "hooks": {
+                "PermissionRequest": [{
+                    "hooks": [{
+                        "type": "command",
+                        "command": script_path.display().to_string(),
+                    }]
+                }]
+            }
+        })
+        .to_string(),
+    )
+    .context("write hooks.json")?;
+
+    let mut hook_shell_argv = session
+        .user_shell()
+        .derive_exec_args("", /*use_login_shell*/ false);
+    let hook_shell_program = hook_shell_argv.remove(0);
+    let _ = hook_shell_argv.pop();
+    session.services.hooks = Hooks::new(HooksConfig {
+        feature_enabled: true,
+        config_layer_stack: Some(turn_context.config.config_layer_stack.clone()),
+        shell_program: Some(hook_shell_program),
+        shell_args: hook_shell_argv,
+        ..HooksConfig::default()
+    });
+
+    let sandbox_policy = SandboxPolicy::new_read_only_policy();
+    turn_context.approval_policy = Constrained::allow_any(AskForApproval::OnRequest);
+    turn_context.sandbox_policy = Constrained::allow_any(sandbox_policy.clone());
+    turn_context.file_system_sandbox_policy = read_only_file_system_sandbox_policy();
+    turn_context.network_sandbox_policy = NetworkSandboxPolicy::Restricted;
+
+    let workdir = AbsolutePathBuf::try_from(std::env::current_dir()?)?;
+    let target = std::env::temp_dir().join("execve-hook-short-circuit.txt");
+    let target_str = target.display().to_string();
+    let command = vec!["touch".to_string(), target_str.clone()];
+    let expected_hook_command =
+        codex_shell_command::parse_command::shlex_join(&["/usr/bin/touch".to_string(), target_str]);
+    let provider = CoreShellActionProvider {
+        policy: std::sync::Arc::new(RwLock::new(codex_execpolicy::Policy::empty())),
+        session: std::sync::Arc::new(session),
+        turn: std::sync::Arc::new(turn_context),
+        call_id: "execve-hook-call".to_string(),
+        tool_name: GuardianCommandSource::Shell,
+        approval_policy: AskForApproval::OnRequest,
+        sandbox_policy,
+        file_system_sandbox_policy: read_only_file_system_sandbox_policy(),
+        network_sandbox_policy: NetworkSandboxPolicy::Restricted,
+        sandbox_permissions: SandboxPermissions::RequireEscalated,
+        approval_sandbox_permissions: SandboxPermissions::RequireEscalated,
+        prompt_permissions: None,
+        stopwatch: codex_shell_escalation::Stopwatch::new(Duration::from_secs(1)),
+    };
+
+    let action = tokio::time::timeout(
+        Duration::from_secs(5),
+        codex_shell_escalation::EscalationPolicy::determine_action(
+            &provider,
+            &AbsolutePathBuf::from_absolute_path("/usr/bin/touch")
+                .context("build touch absolute path")?,
+            &command,
+            &workdir,
+        ),
+    )
+    .await
+    .context("timed out waiting for execve permission hook decision")??;
+    assert!(matches!(
+        action,
+        codex_shell_escalation::EscalationDecision::Escalate(
+            codex_shell_escalation::EscalationExecution::Unsandboxed
+        )
+    ));
+
+    let hook_inputs: Vec<Value> = std::fs::read_to_string(&log_path)
+        .with_context(|| format!("read hook log at {}", log_path.display()))?
+        .lines()
+        .map(serde_json::from_str)
+        .collect::<serde_json::Result<_>>()
+        .context("parse hook log")?;
+    assert_eq!(hook_inputs.len(), 1);
+    assert_eq!(
+        hook_inputs[0]["tool_input"]["command"],
+        expected_hook_command
+    );
+    assert_eq!(
+        hook_inputs[0]["tool_input"]["description"],
+        serde_json::Value::Null
+    );
+
+    Ok(())
+}
+
 #[test]
 fn evaluate_intercepted_exec_policy_uses_wrapper_command_when_shell_wrapper_parsing_disabled() {
     let policy_src = r#"prefix_rule(pattern = ["npm", "publish"], decision = "prompt")"#;

codex-rs/core/src/tools/runtimes/unified_exec.rs

@@ -21,6 +21,7 @@ use crate::tools::runtimes::shell::zsh_fork_backend;
 use crate::tools::sandboxing::Approvable;
 use crate::tools::sandboxing::ApprovalCtx;
 use crate::tools::sandboxing::ExecApprovalRequirement;
+use crate::tools::sandboxing::PermissionRequestPayload;
 use crate::tools::sandboxing::SandboxAttempt;
 use crate::tools::sandboxing::SandboxOverride;
 use crate::tools::sandboxing::Sandboxable;
@@ -50,6 +51,7 @@ use std::collections::HashMap;
 #[derive(Clone, Debug)]
 pub struct UnifiedExecRequest {
     pub command: Vec<String>,
+    pub hook_command: String,
     pub process_id: i32,
     pub cwd: AbsolutePathBuf,
     pub env: HashMap<String, String>,
@@ -179,6 +181,17 @@ impl Approvable<UnifiedExecRequest> for UnifiedExecRuntime<'_> {
         Some(req.exec_approval_requirement.clone())
     }
 
+    fn permission_request_payload(
+        &self,
+        req: &UnifiedExecRequest,
+    ) -> Option<PermissionRequestPayload> {
+        Some(PermissionRequestPayload {
+            tool_name: "Bash".to_string(),
+            command: req.hook_command.clone(),
+            description: req.justification.clone(),
+        })
+    }
+
     fn sandbox_mode_for_first_attempt(&self, req: &UnifiedExecRequest) -> SandboxOverride {
         sandbox_override_for_first_attempt(req.sandbox_permissions, &req.exec_approval_requirement)
     }
@@ -194,6 +207,7 @@ impl<'a> ToolRuntime<UnifiedExecRequest, UnifiedExecProcess> for UnifiedExecRunt
         Some(NetworkApprovalSpec {
             network: req.network.clone(),
             mode: NetworkApprovalMode::Deferred,
+            command: req.hook_command.clone(),
         })
     }
 

codex-rs/core/src/tools/sandboxing.rs

@@ -131,6 +131,13 @@ pub(crate) struct ApprovalCtx<'a> {
     pub network_approval_context: Option<NetworkApprovalContext>,
 }
 
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub(crate) struct PermissionRequestPayload {
+    pub tool_name: String,
+    pub command: String,
+    pub description: Option<String>,
+}
+
 // Specifies what tool orchestrator should do with a given tool call.
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub(crate) enum ExecApprovalRequirement {
@@ -273,6 +280,12 @@ pub(crate) trait Approvable<Req> {
         None
     }
 
+    /// Return hook input for approval-time policy hooks when this runtime wants
+    /// hook evaluation to run before guardian or user approval.
+    fn permission_request_payload(&self, _req: &Req) -> Option<PermissionRequestPayload> {
+        None
+    }
+
     /// Decide we can request an approval for no-sandbox execution.
     fn wants_no_sandbox_approval(&self, policy: AskForApproval) -> bool {
         match policy {

codex-rs/core/src/unified_exec/mod.rs

@@ -88,6 +88,7 @@ impl UnifiedExecContext {
 #[derive(Debug)]
 pub(crate) struct ExecCommandRequest {
     pub command: Vec<String>,
+    pub hook_command: String,
     pub process_id: i32,
     pub yield_time_ms: u64,
     pub max_output_tokens: Option<usize>,

codex-rs/core/src/unified_exec/process_manager.rs

@@ -751,6 +751,7 @@ impl UnifiedExecProcessManager {
             .await;
         let req = UnifiedExecToolRequest {
             command: request.command.clone(),
+            hook_command: request.hook_command.clone(),
             process_id: request.process_id,
             cwd,
             env,

codex-rs/core/tests/suite/hooks.rs

@@ -3,17 +3,27 @@ use std::path::Path;
 
 use anyhow::Context;
 use anyhow::Result;
+use codex_core::config::Constrained;
+use codex_core::config_loader::ConfigLayerStack;
+use codex_core::config_loader::ConfigLayerStackOrdering;
+use codex_core::config_loader::NetworkConstraints;
+use codex_core::config_loader::NetworkRequirementsToml;
+use codex_core::config_loader::RequirementSource;
+use codex_core::config_loader::Sourced;
 use codex_features::Feature;
 use codex_protocol::items::parse_hook_prompt_fragment;
 use codex_protocol::models::ContentItem;
 use codex_protocol::models::ResponseItem;
+use codex_protocol::protocol::AskForApproval;
 use codex_protocol::protocol::EventMsg;
 use codex_protocol::protocol::Op;
 use codex_protocol::protocol::RolloutItem;
 use codex_protocol::protocol::RolloutLine;
+use codex_protocol::protocol::SandboxPolicy;
 use codex_protocol::user_input::UserInput;
 use core_test_support::responses::ev_assistant_message;
 use core_test_support::responses::ev_completed;
+use core_test_support::responses::ev_function_call;
 use core_test_support::responses::ev_message_item_added;
 use core_test_support::responses::ev_output_text_delta;
 use core_test_support::responses::ev_response_created;
@@ -28,13 +38,18 @@ use core_test_support::test_codex::test_codex;
 use core_test_support::wait_for_event;
 use pretty_assertions::assert_eq;
 use serde_json::Value;
+use std::sync::Arc;
 use std::time::Duration;
+use tempfile::TempDir;
 use tokio::sync::oneshot;
 use tokio::time::sleep;
+use tokio::time::timeout;
 
 const FIRST_CONTINUATION_PROMPT: &str = "Retry with exactly the phrase meow meow meow.";
 const SECOND_CONTINUATION_PROMPT: &str = "Now tighten it to just: meow.";
 const BLOCKED_PROMPT_CONTEXT: &str = "Remember the blocked lighthouse note.";
+const PERMISSION_REQUEST_HOOK_MATCHER: &str = "^Bash$";
+const PERMISSION_REQUEST_ALLOW_REASON: &str = "should not be used for allow";
 
 fn write_stop_hook(home: &Path, block_prompts: &[&str]) -> Result<()> {
     let script_path = home.join("stop_hook.py");
@@ -237,6 +252,88 @@ elif mode == "exit_2":
     Ok(())
 }
 
+fn write_permission_request_hook(
+    home: &Path,
+    matcher: Option<&str>,
+    mode: &str,
+    reason: &str,
+) -> Result<()> {
+    let script_path = home.join("permission_request_hook.py");
+    let log_path = home.join("permission_request_hook_log.jsonl");
+    let mode_json = serde_json::to_string(mode).context("serialize permission request mode")?;
+    let reason_json =
+        serde_json::to_string(reason).context("serialize permission request reason")?;
+    let script = format!(
+        r#"import json
+from pathlib import Path
+import sys
+
+log_path = Path(r"{log_path}")
+mode = {mode_json}
+reason = {reason_json}
+
+payload = json.load(sys.stdin)
+
+with log_path.open("a", encoding="utf-8") as handle:
+    handle.write(json.dumps(payload) + "\n")
+
+if mode == "allow":
+    print(json.dumps({{
+        "hookSpecificOutput": {{
+            "hookEventName": "PermissionRequest",
+            "decision": {{"behavior": "allow"}}
+        }}
+    }}))
+elif mode == "deny":
+    print(json.dumps({{
+        "hookSpecificOutput": {{
+            "hookEventName": "PermissionRequest",
+            "decision": {{
+                "behavior": "deny",
+                "message": reason
+            }}
+        }}
+    }}))
+elif mode == "exit_2":
+    sys.stderr.write(reason + "\n")
+    raise SystemExit(2)
+"#,
+        log_path = log_path.display(),
+        mode_json = mode_json,
+        reason_json = reason_json,
+    );
+
+    let mut group = serde_json::json!({
+        "hooks": [{
+            "type": "command",
+            "command": format!("python3 {}", script_path.display()),
+            "statusMessage": "running permission request hook",
+        }]
+    });
+    if let Some(matcher) = matcher {
+        group["matcher"] = Value::String(matcher.to_string());
+    }
+
+    let hooks = serde_json::json!({
+        "hooks": {
+            "PermissionRequest": [group]
+        }
+    });
+
+    fs::write(&script_path, script).context("write permission request hook script")?;
+    fs::write(home.join("hooks.json"), hooks.to_string()).context("write hooks.json")?;
+    Ok(())
+}
+
+fn install_allow_permission_request_hook(home: &Path) -> Result<()> {
+    write_permission_request_hook(
+        home,
+        Some(PERMISSION_REQUEST_HOOK_MATCHER),
+        "allow",
+        PERMISSION_REQUEST_ALLOW_REASON,
+    )
+}
+
 fn write_post_tool_use_hook(
     home: &Path,
     matcher: Option<&str>,
@@ -397,6 +494,46 @@ fn read_pre_tool_use_hook_inputs(home: &Path) -> Result<Vec<serde_json::Value>>
         .collect()
 }
 
+fn read_permission_request_hook_inputs(home: &Path) -> Result<Vec<serde_json::Value>> {
+    fs::read_to_string(home.join("permission_request_hook_log.jsonl"))
+        .context("read permission request hook log")?
+        .lines()
+        .filter(|line| !line.trim().is_empty())
+        .map(|line| serde_json::from_str(line).context("parse permission request hook log line"))
+        .collect()
+}
+
+fn assert_permission_request_hook_input(
+    hook_input: &Value,
+    command: &str,
+    description: Option<&str>,
+) {
+    assert_eq!(hook_input["hook_event_name"], "PermissionRequest");
+    assert_eq!(hook_input["tool_name"], "Bash");
+    assert_eq!(hook_input["tool_input"]["command"], command);
+    assert_eq!(
+        hook_input["tool_input"]["description"],
+        description.map_or(Value::Null, Value::from)
+    );
+    assert!(hook_input.get("approval_attempt").is_none());
+    assert!(hook_input.get("sandbox_permissions").is_none());
+    assert!(hook_input.get("additional_permissions").is_none());
+    assert!(hook_input.get("justification").is_none());
+    assert!(hook_input.get("host").is_none());
+    assert!(hook_input.get("protocol").is_none());
+}
+
+fn assert_single_permission_request_hook_input(
+    home: &Path,
+    command: &str,
+    description: Option<&str>,
+) -> Result<Vec<serde_json::Value>> {
+    let hook_inputs = read_permission_request_hook_inputs(home)?;
+    assert_eq!(hook_inputs.len(), 1);
+    assert_permission_request_hook_input(&hook_inputs[0], command, description);
+    Ok(hook_inputs)
+}
+
 fn read_post_tool_use_hook_inputs(home: &Path) -> Result<Vec<serde_json::Value>> {
     fs::read_to_string(home.join("post_tool_use_hook_log.jsonl"))
         .context("read post tool use hook log")?
@@ -1005,6 +1142,392 @@ async fn blocked_queued_prompt_does_not_strand_earlier_accepted_prompt() -> Resu
     Ok(())
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn permission_request_hook_allows_shell_command_without_user_approval() -> Result<()> {
+    skip_if_no_network!(Ok(()));
+
+    let server = start_mock_server().await;
+    let call_id = "permissionrequest-shell-command";
+    let marker = std::env::temp_dir().join("permissionrequest-shell-command-marker");
+    let command = format!("rm -f {}", marker.display());
+    let args = serde_json::json!({ "command": command });
+    let responses = mount_sse_sequence(
+        &server,
+        vec![
+            sse(vec![
+                ev_response_created("resp-1"),
+                core_test_support::responses::ev_function_call(
+                    call_id,
+                    "shell_command",
+                    &serde_json::to_string(&args)?,
+                ),
+                ev_completed("resp-1"),
+            ]),
+            sse(vec![
+                ev_response_created("resp-2"),
+                ev_assistant_message("msg-1", "permission request hook allowed it"),
+                ev_completed("resp-2"),
+            ]),
+        ],
+    )
+    .await;
+
+    let mut builder = test_codex()
+        .with_pre_build_hook(|home| {
+            if let Err(error) = install_allow_permission_request_hook(home) {
+                panic!("failed to write permission request hook test fixture: {error}");
+            }
+        })
+        .with_config(|config| {
+            config
+                .features
+                .enable(Feature::CodexHooks)
+                .expect("test config should allow feature update");
+        });
+    let test = builder.build(&server).await?;
+
+    fs::write(&marker, "seed").context("create permission request marker")?;
+
+    test.submit_turn_with_policies(
+        "run the shell command after hook approval",
+        AskForApproval::OnRequest,
+        codex_protocol::protocol::SandboxPolicy::DangerFullAccess,
+    )
+    .await?;
+
+    let requests = responses.requests();
+    assert_eq!(requests.len(), 2);
+    requests[1].function_call_output(call_id);
+    assert!(
+        !marker.exists(),
+        "approved command should remove marker file"
+    );
+
+    let hook_inputs = assert_single_permission_request_hook_input(
+        test.codex_home_path(),
+        &command,
+        /*description*/ None,
+    )?;
+    assert!(
+        hook_inputs[0].get("tool_use_id").is_none(),
+        "PermissionRequest input should not include a tool_use_id",
+    );
+    assert!(
+        hook_inputs[0]["turn_id"]
+            .as_str()
+            .is_some_and(|turn_id| !turn_id.is_empty())
+    );
+
+    Ok(())
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn permission_request_hook_sees_raw_exec_command_input() -> Result<()> {
+    skip_if_no_network!(Ok(()));
+
+    let server = start_mock_server().await;
+    let call_id = "permissionrequest-exec-command";
+    let marker = std::env::temp_dir().join("permissionrequest-exec-command-marker");
+    let command = format!("rm -f {}", marker.display());
+    let justification = "remove the temporary marker";
+    let args = serde_json::json!({
+        "cmd": command,
+        "login": true,
+        "sandbox_permissions": "require_escalated",
+        "justification": justification,
+    });
+    let responses = mount_sse_sequence(
+        &server,
+        vec![
+            sse(vec![
+                ev_response_created("resp-1"),
+                core_test_support::responses::ev_function_call(
+                    call_id,
+                    "exec_command",
+                    &serde_json::to_string(&args)?,
+                ),
+                ev_completed("resp-1"),
+            ]),
+            sse(vec![
+                ev_response_created("resp-2"),
+                ev_assistant_message("msg-1", "permission request hook allowed exec_command"),
+                ev_completed("resp-2"),
+            ]),
+        ],
+    )
+    .await;
+
+    let mut builder = test_codex()
+        .with_pre_build_hook(|home| {
+            if let Err(error) = install_allow_permission_request_hook(home) {
+                panic!("failed to write permission request hook test fixture: {error}");
+            }
+        })
+        .with_config(|config| {
+            config.use_experimental_unified_exec_tool = true;
+            config
+                .features
+                .enable(Feature::CodexHooks)
+                .expect("test config should allow feature update");
+            config
+                .features
+                .enable(Feature::UnifiedExec)
+                .expect("test config should allow feature update");
+        });
+    let test = builder.build(&server).await?;
+
+    fs::write(&marker, "seed").context("create exec command permission request marker")?;
+
+    test.submit_turn_with_policies(
+        "run the exec command after hook approval",
+        AskForApproval::OnRequest,
+        codex_protocol::protocol::SandboxPolicy::new_read_only_policy(),
+    )
+    .await?;
+
+    let requests = responses.requests();
+    assert_eq!(requests.len(), 2);
+    requests[1].function_call_output(call_id);
+    assert!(
+        !marker.exists(),
+        "approved exec command should remove marker file"
+    );
+
+    assert_single_permission_request_hook_input(
+        test.codex_home_path(),
+        &command,
+        Some(justification),
+    )?;
+
+    Ok(())
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn permission_request_hook_allows_network_approval_without_prompt() -> Result<()> {
+    skip_if_no_network!(Ok(()));
+
+    let server = start_mock_server().await;
+    let home = Arc::new(TempDir::new()?);
+    fs::write(
+        home.path().join("config.toml"),
+        r#"default_permissions = "workspace"
+
+[permissions.workspace.filesystem]
+":minimal" = "read"
+
+[permissions.workspace.network]
+enabled = true
+mode = "limited"
+allow_local_binding = true
+"#,
+    )?;
+    let call_id = "permissionrequest-network-approval";
+    let command = r#"python3 -c "import urllib.request; opener = urllib.request.build_opener(urllib.request.ProxyHandler()); print('OK:' + opener.open('http://codex-network-test.invalid', timeout=2).read().decode(errors='replace'))""#;
+    let args = serde_json::json!({ "command": command });
+    let _responses = mount_sse_sequence(
+        &server,
+        vec![
+            sse(vec![
+                ev_response_created("resp-1"),
+                ev_function_call(call_id, "shell_command", &serde_json::to_string(&args)?),
+                ev_completed("resp-1"),
+            ]),
+            sse(vec![
+                ev_response_created("resp-2"),
+                ev_assistant_message("msg-1", "permission request hook allowed network access"),
+                ev_completed("resp-2"),
+            ]),
+        ],
+    )
+    .await;
+
+    let approval_policy = AskForApproval::OnFailure;
+    let sandbox_policy = SandboxPolicy::WorkspaceWrite {
+        writable_roots: vec![],
+        read_only_access: Default::default(),
+        network_access: true,
+        exclude_tmpdir_env_var: false,
+        exclude_slash_tmp: false,
+    };
+    let sandbox_policy_for_config = sandbox_policy.clone();
+    let test = test_codex()
+        .with_home(Arc::clone(&home))
+        .with_pre_build_hook(|home| {
+            if let Err(error) = install_allow_permission_request_hook(home) {
+                panic!("failed to write permission request hook test fixture: {error}");
+            }
+        })
+        .with_config(move |config| {
+            config
+                .features
+                .enable(Feature::CodexHooks)
+                .expect("test config should allow feature update");
+            config.permissions.approval_policy = Constrained::allow_any(approval_policy);
+            config.permissions.sandbox_policy = Constrained::allow_any(sandbox_policy_for_config);
+            let layers = config
+                .config_layer_stack
+                .get_layers(
+                    ConfigLayerStackOrdering::LowestPrecedenceFirst,
+                    /*include_disabled*/ true,
+                )
+                .into_iter()
+                .cloned()
+                .collect();
+            let mut requirements = config.config_layer_stack.requirements().clone();
+            requirements.network = Some(Sourced::new(
+                NetworkConstraints {
+                    enabled: Some(true),
+                    allow_local_binding: Some(true),
+                    ..Default::default()
+                },
+                RequirementSource::CloudRequirements,
+            ));
+            let mut requirements_toml = config.config_layer_stack.requirements_toml().clone();
+            requirements_toml.network = Some(NetworkRequirementsToml {
+                enabled: Some(true),
+                allow_local_binding: Some(true),
+                ..Default::default()
+            });
+            config.config_layer_stack =
+                ConfigLayerStack::new(layers, requirements, requirements_toml)
+                    .expect("rebuild config layer stack with network requirements");
+        })
+        .build(&server)
+        .await?;
+    assert!(
+        test.config.managed_network_requirements_enabled(),
+        "expected managed network requirements to be enabled"
+    );
+    assert!(
+        test.config.permissions.network.is_some(),
+        "expected managed network proxy config to be present"
+    );
+    test.session_configured
+        .network_proxy
+        .as_ref()
+        .expect("expected runtime managed network proxy addresses");
+
+    test.submit_turn_with_policies(
+        "run the shell command after network hook approval",
+        approval_policy,
+        sandbox_policy,
+    )
+    .await?;
+
+    timeout(Duration::from_secs(10), async {
+        loop {
+            if test
+                .codex_home_path()
+                .join("permission_request_hook_log.jsonl")
+                .exists()
+            {
+                break;
+            }
+            sleep(Duration::from_millis(100)).await;
+        }
+    })
+    .await
+    .expect("expected network approval hook to run");
+
+    assert!(
+        timeout(
+            Duration::from_secs(2),
+            wait_for_event(&test.codex, |event| matches!(
+                event,
+                EventMsg::ExecApprovalRequest(_)
+            ))
+        )
+        .await
+        .is_err(),
+        "expected the network approval hook to bypass the approval prompt"
+    );
+
+    assert_single_permission_request_hook_input(
+        test.codex_home_path(),
+        command,
+        Some("network-access http://codex-network-test.invalid:80"),
+    )?;
+
+    test.codex.submit(Op::Shutdown {}).await?;
+    wait_for_event(&test.codex, |event| {
+        matches!(event, EventMsg::ShutdownComplete)
+    })
+    .await;
+
+    Ok(())
+}
+
+#[cfg(not(target_os = "linux"))]
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn permission_request_hook_sees_retry_context_after_sandbox_denial() -> Result<()> {
+    skip_if_no_network!(Ok(()));
+
+    let server = start_mock_server().await;
+    let call_id = "permissionrequest-retry-shell-command";
+    let marker = "permissionrequest_retry_marker.txt";
+    let command = format!("printf retry > {marker}");
+    let args = serde_json::json!({ "command": command });
+    let responses = mount_sse_sequence(
+        &server,
+        vec![
+            sse(vec![
+                ev_response_created("resp-1"),
+                core_test_support::responses::ev_function_call(
+                    call_id,
+                    "shell_command",
+                    &serde_json::to_string(&args)?,
+                ),
+                ev_completed("resp-1"),
+            ]),
+            sse(vec![
+                ev_response_created("resp-2"),
+                ev_assistant_message("msg-1", "permission request hook allowed retry"),
+                ev_completed("resp-2"),
+            ]),
+        ],
+    )
+    .await;
+
+    let mut builder = test_codex()
+        .with_pre_build_hook(|home| {
+            if let Err(error) = install_allow_permission_request_hook(home) {
+                panic!("failed to write permission request hook test fixture: {error}");
+            }
+        })
+        .with_config(|config| {
+            config
+                .features
+                .enable(Feature::CodexHooks)
+                .expect("test config should allow feature update");
+        });
+    let test = builder.build(&server).await?;
+    let marker_path = test.workspace_path(marker);
+    let _ = fs::remove_file(&marker_path);
+
+    test.submit_turn_with_policies(
+        "retry the shell command after sandbox denial",
+        AskForApproval::OnFailure,
+        codex_protocol::protocol::SandboxPolicy::new_read_only_policy(),
+    )
+    .await?;
+
+    let requests = responses.requests();
+    assert_eq!(requests.len(), 2);
+    requests[1].function_call_output(call_id);
+    assert_eq!(
+        fs::read_to_string(&marker_path).context("read retry marker")?,
+        "retry"
+    );
+
+    assert_single_permission_request_hook_input(
+        test.codex_home_path(),
+        &command,
+        /*description*/ None,
+    )?;
+
+    Ok(())
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn pre_tool_use_blocks_shell_command_before_execution() -> Result<()> {
     skip_if_no_network!(Ok(()));

codex-rs/hooks/schema/generated/permission-request.command.input.schema.json

@@ -0,0 +1,79 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "definitions": {
+    "NullableString": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "PermissionRequestToolInput": {
+      "additionalProperties": false,
+      "properties": {
+        "command": {
+          "type": "string"
+        },
+        "description": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "command"
+      ],
+      "type": "object"
+    }
+  },
+  "properties": {
+    "cwd": {
+      "type": "string"
+    },
+    "hook_event_name": {
+      "const": "PermissionRequest",
+      "type": "string"
+    },
+    "model": {
+      "type": "string"
+    },
+    "permission_mode": {
+      "enum": [
+        "default",
+        "acceptEdits",
+        "plan",
+        "dontAsk",
+        "bypassPermissions"
+      ],
+      "type": "string"
+    },
+    "session_id": {
+      "type": "string"
+    },
+    "tool_input": {
+      "$ref": "#/definitions/PermissionRequestToolInput"
+    },
+    "tool_name": {
+      "const": "Bash",
+      "type": "string"
+    },
+    "transcript_path": {
+      "$ref": "#/definitions/NullableString"
+    },
+    "turn_id": {
+      "description": "Codex extension: expose the active turn id to internal turn-scoped hooks.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "cwd",
+    "hook_event_name",
+    "model",
+    "permission_mode",
+    "session_id",
+    "tool_input",
+    "tool_name",
+    "transcript_path",
+    "turn_id"
+  ],
+  "title": "permission-request.command.input",
+  "type": "object"
+}

codex-rs/hooks/schema/generated/permission-request.command.output.schema.json

@@ -0,0 +1,101 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "definitions": {
+    "HookEventNameWire": {
+      "enum": [
+        "PreToolUse",
+        "PermissionRequest",
+        "PostToolUse",
+        "SessionStart",
+        "UserPromptSubmit",
+        "Stop"
+      ],
+      "type": "string"
+    },
+    "PermissionRequestBehaviorWire": {
+      "enum": [
+        "allow",
+        "deny"
+      ],
+      "type": "string"
+    },
+    "PermissionRequestDecisionWire": {
+      "additionalProperties": false,
+      "properties": {
+        "behavior": {
+          "$ref": "#/definitions/PermissionRequestBehaviorWire"
+        },
+        "interrupt": {
+          "default": false,
+          "description": "Reserved for future short-circuiting semantics.\n\nPermissionRequest hooks currently fail closed if this field is `true`.",
+          "type": "boolean"
+        },
+        "message": {
+          "default": null,
+          "type": "string"
+        },
+        "updatedInput": {
+          "default": null,
+          "description": "Reserved for a future input-rewrite capability.\n\nPermissionRequest hooks currently fail closed if this field is present."
+        },
+        "updatedPermissions": {
+          "default": null,
+          "description": "Reserved for a future permission-rewrite capability.\n\nPermissionRequest hooks currently fail closed if this field is present."
+        }
+      },
+      "required": [
+        "behavior"
+      ],
+      "type": "object"
+    },
+    "PermissionRequestHookSpecificOutputWire": {
+      "additionalProperties": false,
+      "properties": {
+        "decision": {
+          "allOf": [
+            {
+              "$ref": "#/definitions/PermissionRequestDecisionWire"
+            }
+          ],
+          "default": null
+        },
+        "hookEventName": {
+          "$ref": "#/definitions/HookEventNameWire"
+        }
+      },
+      "required": [
+        "hookEventName"
+      ],
+      "type": "object"
+    }
+  },
+  "properties": {
+    "continue": {
+      "default": true,
+      "type": "boolean"
+    },
+    "hookSpecificOutput": {
+      "allOf": [
+        {
+          "$ref": "#/definitions/PermissionRequestHookSpecificOutputWire"
+        }
+      ],
+      "default": null
+    },
+    "stopReason": {
+      "default": null,
+      "type": "string"
+    },
+    "suppressOutput": {
+      "default": false,
+      "type": "boolean"
+    },
+    "systemMessage": {
+      "default": null,
+      "type": "string"
+    }
+  },
+  "title": "permission-request.command.output",
+  "type": "object"
+}

codex-rs/hooks/schema/generated/post-tool-use.command.output.schema.json

@@ -11,6 +11,7 @@
     "HookEventNameWire": {
       "enum": [
         "PreToolUse",
+        "PermissionRequest",
         "PostToolUse",
         "SessionStart",
         "UserPromptSubmit",

codex-rs/hooks/schema/generated/pre-tool-use.command.output.schema.json

@@ -5,6 +5,7 @@
     "HookEventNameWire": {
       "enum": [
         "PreToolUse",
+        "PermissionRequest",
         "PostToolUse",
         "SessionStart",
         "UserPromptSubmit",

codex-rs/hooks/schema/generated/session-start.command.output.schema.json

@@ -5,6 +5,7 @@
     "HookEventNameWire": {
       "enum": [
         "PreToolUse",
+        "PermissionRequest",
         "PostToolUse",
         "SessionStart",
         "UserPromptSubmit",

codex-rs/hooks/schema/generated/user-prompt-submit.command.output.schema.json

@@ -11,6 +11,7 @@
     "HookEventNameWire": {
       "enum": [
         "PreToolUse",
+        "PermissionRequest",
         "PostToolUse",
         "SessionStart",
         "UserPromptSubmit",

codex-rs/hooks/src/engine/config.rs

@@ -10,6 +10,8 @@ pub(crate) struct HooksFile {
 pub(crate) struct HookEvents {
     #[serde(rename = "PreToolUse", default)]
     pub pre_tool_use: Vec<MatcherGroup>,
+    #[serde(rename = "PermissionRequest", default)]
+    pub permission_request: Vec<MatcherGroup>,
     #[serde(rename = "PostToolUse", default)]
     pub post_tool_use: Vec<MatcherGroup>,
     #[serde(rename = "SessionStart", default)]

codex-rs/hooks/src/engine/discovery.rs

@@ -65,6 +65,7 @@ pub(crate) fn discover_handlers(config_layer_stack: Option<&ConfigLayerStack>) -
 
         let super::config::HookEvents {
             pre_tool_use,
+            permission_request,
             post_tool_use,
             session_start,
             user_prompt_submit,
@@ -76,6 +77,10 @@ pub(crate) fn discover_handlers(config_layer_stack: Option<&ConfigLayerStack>) -
                 codex_protocol::protocol::HookEventName::PreToolUse,
                 pre_tool_use,
             ),
+            (
+                codex_protocol::protocol::HookEventName::PermissionRequest,
+                permission_request,
+            ),
             (
                 codex_protocol::protocol::HookEventName::PostToolUse,
                 post_tool_use,

codex-rs/hooks/src/engine/dispatcher.rs

@@ -32,6 +32,7 @@ pub(crate) fn select_handlers(
         .filter(|handler| handler.event_name == event_name)
         .filter(|handler| match event_name {
             HookEventName::PreToolUse
+            | HookEventName::PermissionRequest
             | HookEventName::PostToolUse
             | HookEventName::SessionStart => {
                 matches_matcher(handler.matcher.as_deref(), matcher_input)
@@ -111,6 +112,7 @@ fn scope_for_event(event_name: HookEventName) -> HookScope {
     match event_name {
         HookEventName::SessionStart => HookScope::Thread,
         HookEventName::PreToolUse
+        | HookEventName::PermissionRequest
         | HookEventName::PostToolUse
         | HookEventName::UserPromptSubmit
         | HookEventName::Stop => HookScope::Turn,

codex-rs/hooks/src/engine/mod.rs

@@ -10,6 +10,8 @@ use codex_protocol::protocol::HookRunSummary;
 use codex_protocol::protocol::HookSource;
 use codex_utils_absolute_path::AbsolutePathBuf;
 
+use crate::events::permission_request::PermissionRequestOutcome;
+use crate::events::permission_request::PermissionRequestRequest;
 use crate::events::post_tool_use::PostToolUseOutcome;
 use crate::events::post_tool_use::PostToolUseRequest;
 use crate::events::pre_tool_use::PreToolUseOutcome;
@@ -52,6 +54,7 @@ impl ConfiguredHandler {
     fn event_name_label(&self) -> &'static str {
         match self.event_name {
             codex_protocol::protocol::HookEventName::PreToolUse => "pre-tool-use",
+            codex_protocol::protocol::HookEventName::PermissionRequest => "permission-request",
             codex_protocol::protocol::HookEventName::PostToolUse => "post-tool-use",
             codex_protocol::protocol::HookEventName::SessionStart => "session-start",
             codex_protocol::protocol::HookEventName::UserPromptSubmit => "user-prompt-submit",
@@ -105,6 +108,13 @@ impl ClaudeHooksEngine {
         crate::events::pre_tool_use::preview(&self.handlers, request)
     }
 
+    pub(crate) fn preview_permission_request(
+        &self,
+        request: &PermissionRequestRequest,
+    ) -> Vec<HookRunSummary> {
+        crate::events::permission_request::preview(&self.handlers, request)
+    }
+
     pub(crate) fn preview_post_tool_use(
         &self,
         request: &PostToolUseRequest,
@@ -124,6 +134,13 @@ impl ClaudeHooksEngine {
         crate::events::pre_tool_use::run(&self.handlers, &self.shell, request).await
     }
 
+    pub(crate) async fn run_permission_request(
+        &self,
+        request: PermissionRequestRequest,
+    ) -> PermissionRequestOutcome {
+        crate::events::permission_request::run(&self.handlers, &self.shell, request).await
+    }
+
     pub(crate) async fn run_post_tool_use(
         &self,
         request: PostToolUseRequest,

codex-rs/hooks/src/engine/output_parser.rs

@@ -19,6 +19,19 @@ pub(crate) struct PreToolUseOutput {
     pub invalid_reason: Option<String>,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub(crate) enum PermissionRequestDecision {
+    Allow,
+    Deny { message: String },
+}
+
+#[derive(Debug, Clone)]
+pub(crate) struct PermissionRequestOutput {
+    pub universal: UniversalOutput,
+    pub decision: Option<PermissionRequestDecision>,
+    pub invalid_reason: Option<String>,
+}
+
 #[derive(Debug, Clone)]
 pub(crate) struct PostToolUseOutput {
     pub universal: UniversalOutput,
@@ -48,6 +61,9 @@ pub(crate) struct StopOutput {
 
 use crate::schema::BlockDecisionWire;
 use crate::schema::HookUniversalOutputWire;
+use crate::schema::PermissionRequestBehaviorWire;
+use crate::schema::PermissionRequestCommandOutputWire;
+use crate::schema::PermissionRequestDecisionWire;
 use crate::schema::PostToolUseCommandOutputWire;
 use crate::schema::PreToolUseCommandOutputWire;
 use crate::schema::PreToolUseDecisionWire;
@@ -115,6 +131,29 @@ pub(crate) fn parse_pre_tool_use(stdout: &str) -> Option<PreToolUseOutput> {
     })
 }
 
+pub(crate) fn parse_permission_request(stdout: &str) -> Option<PermissionRequestOutput> {
+    let wire: PermissionRequestCommandOutputWire = parse_json(stdout)?;
+    let universal = UniversalOutput::from(wire.universal);
+    let hook_specific_output = wire.hook_specific_output.as_ref();
+    let decision = hook_specific_output.and_then(|output| output.decision.as_ref());
+    let invalid_reason = unsupported_permission_request_universal(&universal).or_else(|| {
+        hook_specific_output.and_then(|output| {
+            unsupported_permission_request_hook_specific_output(output.decision.as_ref())
+        })
+    });
+    let decision = if invalid_reason.is_none() {
+        decision.map(permission_request_decision)
+    } else {
+        None
+    };
+
+    Some(PermissionRequestOutput {
+        universal,
+        decision,
+        invalid_reason,
+    })
+}
+
 pub(crate) fn parse_post_tool_use(stdout: &str) -> Option<PostToolUseOutput> {
     let wire: PostToolUseCommandOutputWire = parse_json(stdout)?;
     let universal = UniversalOutput::from(wire.universal);
@@ -235,6 +274,18 @@ fn unsupported_pre_tool_use_universal(universal: &UniversalOutput) -> Option<Str
     }
 }
 
+fn unsupported_permission_request_universal(universal: &UniversalOutput) -> Option<String> {
+    if !universal.continue_processing {
+        Some("PermissionRequest hook returned unsupported continue:false".to_string())
+    } else if universal.stop_reason.is_some() {
+        Some("PermissionRequest hook returned unsupported stopReason".to_string())
+    } else if universal.suppress_output {
+        Some("PermissionRequest hook returned unsupported suppressOutput".to_string())
+    } else {
+        None
+    }
+}
+
 fn unsupported_post_tool_use_universal(universal: &UniversalOutput) -> Option<String> {
     if universal.suppress_output {
         Some("PostToolUse hook returned unsupported suppressOutput".to_string())
@@ -243,6 +294,36 @@ fn unsupported_post_tool_use_universal(universal: &UniversalOutput) -> Option<St
     }
 }
 
+fn unsupported_permission_request_hook_specific_output(
+    decision: Option<&PermissionRequestDecisionWire>,
+) -> Option<String> {
+    let decision = decision?;
+    if decision.updated_input.is_some() {
+        Some("PermissionRequest hook returned unsupported updatedInput".to_string())
+    } else if decision.updated_permissions.is_some() {
+        Some("PermissionRequest hook returned unsupported updatedPermissions".to_string())
+    } else if decision.interrupt {
+        Some("PermissionRequest hook returned unsupported interrupt:true".to_string())
+    } else {
+        None
+    }
+}
+
+fn permission_request_decision(
+    decision: &PermissionRequestDecisionWire,
+) -> PermissionRequestDecision {
+    match decision.behavior {
+        PermissionRequestBehaviorWire::Allow => PermissionRequestDecision::Allow,
+        PermissionRequestBehaviorWire::Deny => PermissionRequestDecision::Deny {
+            message: decision
+                .message
+                .as_deref()
+                .and_then(trimmed_reason)
+                .unwrap_or_else(|| "PermissionRequest hook denied approval".to_string()),
+        },
+    }
+}
+
 fn unsupported_post_tool_use_hook_specific_output(
     output: &crate::schema::PostToolUseHookSpecificOutputWire,
 ) -> Option<String> {
@@ -334,3 +415,80 @@ fn trimmed_reason(reason: &str) -> Option<String> {
         Some(trimmed.to_string())
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use pretty_assertions::assert_eq;
+    use serde_json::json;
+
+    use super::parse_permission_request;
+
+    #[test]
+    fn permission_request_rejects_reserved_updated_input_field() {
+        let parsed = parse_permission_request(
+            &json!({
+                "continue": true,
+                "hookSpecificOutput": {
+                    "hookEventName": "PermissionRequest",
+                    "decision": {
+                        "behavior": "allow",
+                        "updatedInput": {}
+                    }
+                }
+            })
+            .to_string(),
+        )
+        .expect("permission request hook output should parse");
+
+        assert_eq!(
+            parsed.invalid_reason,
+            Some("PermissionRequest hook returned unsupported updatedInput".to_string())
+        );
+    }
+
+    #[test]
+    fn permission_request_rejects_reserved_updated_permissions_field() {
+        let parsed = parse_permission_request(
+            &json!({
+                "continue": true,
+                "hookSpecificOutput": {
+                    "hookEventName": "PermissionRequest",
+                    "decision": {
+                        "behavior": "allow",
+                        "updatedPermissions": {}
+                    }
+                }
+            })
+            .to_string(),
+        )
+        .expect("permission request hook output should parse");
+
+        assert_eq!(
+            parsed.invalid_reason,
+            Some("PermissionRequest hook returned unsupported updatedPermissions".to_string())
+        );
+    }
+
+    #[test]
+    fn permission_request_rejects_reserved_interrupt_field() {
+        let parsed = parse_permission_request(
+            &json!({
+                "continue": true,
+                "hookSpecificOutput": {
+                    "hookEventName": "PermissionRequest",
+                    "decision": {
+                        "behavior": "allow",
+                        "interrupt": true
+                    }
+                }
+            })
+            .to_string(),
+        )
+        .expect("permission request hook output should parse");
+
+        assert_eq!(
+            parsed.invalid_reason,
+            Some("PermissionRequest hook returned unsupported interrupt:true".to_string())
+        );
+    }
+}

codex-rs/hooks/src/engine/schema_loader.rs

@@ -6,6 +6,8 @@ use serde_json::Value;
 pub(crate) struct GeneratedHookSchemas {
     pub post_tool_use_command_input: Value,
     pub post_tool_use_command_output: Value,
+    pub permission_request_command_input: Value,
+    pub permission_request_command_output: Value,
     pub pre_tool_use_command_input: Value,
     pub pre_tool_use_command_output: Value,
     pub session_start_command_input: Value,
@@ -27,6 +29,14 @@ pub(crate) fn generated_hook_schemas() -> &'static GeneratedHookSchemas {
             "post-tool-use.command.output",
             include_str!("../../schema/generated/post-tool-use.command.output.schema.json"),
         ),
+        permission_request_command_input: parse_json_schema(
+            "permission-request.command.input",
+            include_str!("../../schema/generated/permission-request.command.input.schema.json"),
+        ),
+        permission_request_command_output: parse_json_schema(
+            "permission-request.command.output",
+            include_str!("../../schema/generated/permission-request.command.output.schema.json"),
+        ),
         pre_tool_use_command_input: parse_json_schema(
             "pre-tool-use.command.input",
             include_str!("../../schema/generated/pre-tool-use.command.input.schema.json"),
@@ -78,6 +88,8 @@ mod tests {
 
         assert_eq!(schemas.post_tool_use_command_input["type"], "object");
         assert_eq!(schemas.post_tool_use_command_output["type"], "object");
+        assert_eq!(schemas.permission_request_command_input["type"], "object");
+        assert_eq!(schemas.permission_request_command_output["type"], "object");
         assert_eq!(schemas.pre_tool_use_command_input["type"], "object");
         assert_eq!(schemas.pre_tool_use_command_output["type"], "object");
         assert_eq!(schemas.session_start_command_input["type"], "object");

codex-rs/hooks/src/events/common.rs

@@ -100,9 +100,10 @@ pub(crate) fn matcher_pattern_for_event(
     matcher: Option<&str>,
 ) -> Option<&str> {
     match event_name {
-        HookEventName::PreToolUse | HookEventName::PostToolUse | HookEventName::SessionStart => {
-            matcher
-        }
+        HookEventName::PreToolUse
+        | HookEventName::PermissionRequest
+        | HookEventName::PostToolUse
+        | HookEventName::SessionStart => matcher,
         HookEventName::UserPromptSubmit | HookEventName::Stop => None,
     }
 }

codex-rs/hooks/src/events/mod.rs

@@ -1,4 +1,5 @@
 pub(crate) mod common;
+pub mod permission_request;
 pub mod post_tool_use;
 pub mod pre_tool_use;
 pub mod session_start;

codex-rs/hooks/src/events/permission_request.rs

@@ -0,0 +1,331 @@
+//! Permission-request hook execution.
+//!
+//! This event runs in the approval path, before guardian or user approval UI is
+//! shown. Unlike `pre_tool_use`, handlers do not rewrite tool input or block by
+//! stopping execution outright; instead they can return a concrete allow/deny
+//! decision, or decline to decide and let the normal approval flow continue.
+//!
+//! The event also mirrors the rest of the hook system's lifecycle:
+//!
+//! 1. Preview matching handlers so the UI can render pending hook rows.
+//! 2. Execute every matching handler in precedence order.
+//! 3. Parse each handler into transcript-visible output plus an optional
+//!    decision.
+//! 4. Fold the decisions conservatively: any deny wins, otherwise the last
+//!    allow wins, otherwise there is no hook verdict.
+use std::path::PathBuf;
+
+use super::common;
+use crate::engine::CommandShell;
+use crate::engine::ConfiguredHandler;
+use crate::engine::command_runner::CommandRunResult;
+use crate::engine::dispatcher;
+use crate::engine::output_parser;
+use crate::schema::PermissionRequestCommandInput;
+use crate::schema::PermissionRequestToolInput;
+use codex_protocol::ThreadId;
+use codex_protocol::protocol::HookCompletedEvent;
+use codex_protocol::protocol::HookEventName;
+use codex_protocol::protocol::HookOutputEntry;
+use codex_protocol::protocol::HookOutputEntryKind;
+use codex_protocol::protocol::HookRunStatus;
+use codex_protocol::protocol::HookRunSummary;
+
+#[derive(Debug, Clone)]
+pub struct PermissionRequestRequest {
+    pub session_id: ThreadId,
+    pub turn_id: String,
+    pub cwd: PathBuf,
+    pub transcript_path: Option<PathBuf>,
+    pub model: String,
+    pub permission_mode: String,
+    pub tool_name: String,
+    pub run_id_suffix: String,
+    pub command: String,
+    pub description: Option<String>,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum PermissionRequestDecision {
+    Allow,
+    Deny { message: String },
+}
+
+#[derive(Debug)]
+pub struct PermissionRequestOutcome {
+    pub hook_events: Vec<HookCompletedEvent>,
+    pub decision: Option<PermissionRequestDecision>,
+}
+
+#[derive(Debug, Default, PartialEq, Eq)]
+struct PermissionRequestHandlerData {
+    decision: Option<PermissionRequestDecision>,
+}
+
+pub(crate) fn preview(
+    handlers: &[ConfiguredHandler],
+    request: &PermissionRequestRequest,
+) -> Vec<HookRunSummary> {
+    dispatcher::select_handlers(
+        handlers,
+        HookEventName::PermissionRequest,
+        Some(&request.tool_name),
+    )
+    .into_iter()
+    .map(|handler| {
+        common::hook_run_for_tool_use(
+            dispatcher::running_summary(&handler),
+            &request.run_id_suffix,
+        )
+    })
+    .collect()
+}
+
+pub(crate) async fn run(
+    handlers: &[ConfiguredHandler],
+    shell: &CommandShell,
+    request: PermissionRequestRequest,
+) -> PermissionRequestOutcome {
+    let matched = dispatcher::select_handlers(
+        handlers,
+        HookEventName::PermissionRequest,
+        Some(&request.tool_name),
+    );
+    if matched.is_empty() {
+        return PermissionRequestOutcome {
+            hook_events: Vec::new(),
+            decision: None,
+        };
+    }
+
+    let input_json = match serde_json::to_string(&build_command_input(&request)) {
+        Ok(input_json) => input_json,
+        Err(error) => {
+            let hook_events = common::serialization_failure_hook_events_for_tool_use(
+                matched,
+                Some(request.turn_id.clone()),
+                format!("failed to serialize permission request hook input: {error}"),
+                &request.run_id_suffix,
+            );
+            return PermissionRequestOutcome {
+                hook_events,
+                decision: None,
+            };
+        }
+    };
+
+    let results = dispatcher::execute_handlers(
+        shell,
+        matched,
+        input_json,
+        request.cwd.as_path(),
+        Some(request.turn_id.clone()),
+        parse_completed,
+    )
+    .await;
+
+    // Preserve the most specific matching allow, but treat any deny as final so
+    // broader policy layers cannot accidentally overrule a more specific block.
+    let decision = resolve_permission_request_decision(
+        results
+            .iter()
+            .filter_map(|result| result.data.decision.as_ref()),
+    );
+
+    PermissionRequestOutcome {
+        hook_events: results
+            .into_iter()
+            .map(|result| {
+                common::hook_completed_for_tool_use(result.completed, &request.run_id_suffix)
+            })
+            .collect(),
+        decision,
+    }
+}
+
+/// Resolve matching hook decisions conservatively: any deny wins immediately;
+/// otherwise keep the highest-precedence allow so more specific handlers
+/// override broader ones.
+fn resolve_permission_request_decision<'a>(
+    decisions: impl IntoIterator<Item = &'a PermissionRequestDecision>,
+) -> Option<PermissionRequestDecision> {
+    let mut resolved_allow = None;
+    for decision in decisions {
+        match decision {
+            PermissionRequestDecision::Allow => {
+                resolved_allow = Some(PermissionRequestDecision::Allow);
+            }
+            PermissionRequestDecision::Deny { message } => {
+                return Some(PermissionRequestDecision::Deny {
+                    message: message.clone(),
+                });
+            }
+        }
+    }
+    resolved_allow
+}
+
+fn build_command_input(request: &PermissionRequestRequest) -> PermissionRequestCommandInput {
+    PermissionRequestCommandInput {
+        session_id: request.session_id.to_string(),
+        turn_id: request.turn_id.clone(),
+        transcript_path: crate::schema::NullableString::from_path(request.transcript_path.clone()),
+        cwd: request.cwd.display().to_string(),
+        hook_event_name: "PermissionRequest".to_string(),
+        model: request.model.clone(),
+        permission_mode: request.permission_mode.clone(),
+        tool_name: request.tool_name.clone(),
+        tool_input: PermissionRequestToolInput {
+            command: request.command.clone(),
+            description: request.description.clone(),
+        },
+    }
+}
+
+fn parse_completed(
+    handler: &ConfiguredHandler,
+    run_result: CommandRunResult,
+    turn_id: Option<String>,
+) -> dispatcher::ParsedHandler<PermissionRequestHandlerData> {
+    let mut entries = Vec::new();
+    let mut status = HookRunStatus::Completed;
+    let mut decision = None;
+
+    match run_result.error.as_deref() {
+        Some(error) => {
+            status = HookRunStatus::Failed;
+            entries.push(HookOutputEntry {
+                kind: HookOutputEntryKind::Error,
+                text: error.to_string(),
+            });
+        }
+        None => match run_result.exit_code {
+            Some(0) => {
+                let trimmed_stdout = run_result.stdout.trim();
+                if trimmed_stdout.is_empty() {
+                } else if let Some(parsed) =
+                    output_parser::parse_permission_request(&run_result.stdout)
+                {
+                    if let Some(system_message) = parsed.universal.system_message {
+                        entries.push(HookOutputEntry {
+                            kind: HookOutputEntryKind::Warning,
+                            text: system_message,
+                        });
+                    }
+                    if let Some(invalid_reason) = parsed.invalid_reason {
+                        status = HookRunStatus::Failed;
+                        entries.push(HookOutputEntry {
+                            kind: HookOutputEntryKind::Error,
+                            text: invalid_reason,
+                        });
+                    } else if let Some(parsed_decision) = parsed.decision {
+                        match parsed_decision {
+                            output_parser::PermissionRequestDecision::Allow => {
+                                decision = Some(PermissionRequestDecision::Allow);
+                            }
+                            output_parser::PermissionRequestDecision::Deny { message } => {
+                                status = HookRunStatus::Blocked;
+                                entries.push(HookOutputEntry {
+                                    kind: HookOutputEntryKind::Feedback,
+                                    text: message.clone(),
+                                });
+                                decision = Some(PermissionRequestDecision::Deny { message });
+                            }
+                        }
+                    }
+                } else if trimmed_stdout.starts_with('{') || trimmed_stdout.starts_with('[') {
+                    status = HookRunStatus::Failed;
+                    entries.push(HookOutputEntry {
+                        kind: HookOutputEntryKind::Error,
+                        text: "hook returned invalid permission-request JSON output".to_string(),
+                    });
+                }
+            }
+            Some(2) => {
+                if let Some(message) = common::trimmed_non_empty(&run_result.stderr) {
+                    status = HookRunStatus::Blocked;
+                    entries.push(HookOutputEntry {
+                        kind: HookOutputEntryKind::Feedback,
+                        text: message.clone(),
+                    });
+                    decision = Some(PermissionRequestDecision::Deny { message });
+                } else {
+                    status = HookRunStatus::Failed;
+                    entries.push(HookOutputEntry {
+                        kind: HookOutputEntryKind::Error,
+                        text: "PermissionRequest hook exited with code 2 but did not write a denial reason to stderr".to_string(),
+                    });
+                }
+            }
+            Some(exit_code) => {
+                status = HookRunStatus::Failed;
+                entries.push(HookOutputEntry {
+                    kind: HookOutputEntryKind::Error,
+                    text: format!("hook exited with code {exit_code}"),
+                });
+            }
+            None => {
+                status = HookRunStatus::Failed;
+                entries.push(HookOutputEntry {
+                    kind: HookOutputEntryKind::Error,
+                    text: "hook exited without a status code".to_string(),
+                });
+            }
+        },
+    }
+
+    let completed = HookCompletedEvent {
+        turn_id,
+        run: dispatcher::completed_summary(handler, &run_result, status, entries),
+    };
+
+    dispatcher::ParsedHandler {
+        completed,
+        data: PermissionRequestHandlerData { decision },
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use pretty_assertions::assert_eq;
+
+    use super::PermissionRequestDecision;
+    use super::resolve_permission_request_decision;
+
+    #[test]
+    fn permission_request_deny_overrides_earlier_allow() {
+        let decisions = [
+            PermissionRequestDecision::Allow,
+            PermissionRequestDecision::Deny {
+                message: "repo deny".to_string(),
+            },
+        ];
+
+        assert_eq!(
+            resolve_permission_request_decision(decisions.iter()),
+            Some(PermissionRequestDecision::Deny {
+                message: "repo deny".to_string(),
+            })
+        );
+    }
+
+    #[test]
+    fn permission_request_returns_allow_when_no_handler_denies() {
+        let decisions = [
+            PermissionRequestDecision::Allow,
+            PermissionRequestDecision::Allow,
+        ];
+
+        assert_eq!(
+            resolve_permission_request_decision(decisions.iter()),
+            Some(PermissionRequestDecision::Allow)
+        );
+    }
+
+    #[test]
+    fn permission_request_returns_none_when_no_handler_decides() {
+        let decisions = Vec::<PermissionRequestDecision>::new();
+
+        assert_eq!(resolve_permission_request_decision(decisions.iter()), None);
+    }
+}

codex-rs/hooks/src/lib.rs

@@ -5,6 +5,9 @@ mod registry;
 mod schema;
 mod types;
 
+pub use events::permission_request::PermissionRequestDecision;
+pub use events::permission_request::PermissionRequestOutcome;
+pub use events::permission_request::PermissionRequestRequest;
 pub use events::post_tool_use::PostToolUseOutcome;
 pub use events::post_tool_use::PostToolUseRequest;
 pub use events::pre_tool_use::PreToolUseOutcome;

codex-rs/hooks/src/registry.rs

@@ -3,6 +3,8 @@ use tokio::process::Command;
 
 use crate::engine::ClaudeHooksEngine;
 use crate::engine::CommandShell;
+use crate::events::permission_request::PermissionRequestOutcome;
+use crate::events::permission_request::PermissionRequestRequest;
 use crate::events::post_tool_use::PostToolUseOutcome;
 use crate::events::post_tool_use::PostToolUseRequest;
 use crate::events::pre_tool_use::PreToolUseOutcome;
@@ -103,6 +105,13 @@ impl Hooks {
         self.engine.preview_pre_tool_use(request)
     }
 
+    pub fn preview_permission_request(
+        &self,
+        request: &PermissionRequestRequest,
+    ) -> Vec<codex_protocol::protocol::HookRunSummary> {
+        self.engine.preview_permission_request(request)
+    }
+
     pub fn preview_post_tool_use(
         &self,
         request: &PostToolUseRequest,
@@ -122,6 +131,13 @@ impl Hooks {
         self.engine.run_pre_tool_use(request).await
     }
 
+    pub async fn run_permission_request(
+        &self,
+        request: PermissionRequestRequest,
+    ) -> PermissionRequestOutcome {
+        self.engine.run_permission_request(request).await
+    }
+
     pub async fn run_post_tool_use(&self, request: PostToolUseRequest) -> PostToolUseOutcome {
         self.engine.run_post_tool_use(request).await
     }

codex-rs/hooks/src/schema.rs

@@ -15,6 +15,8 @@ use std::path::PathBuf;
 const GENERATED_DIR: &str = "generated";
 const POST_TOOL_USE_INPUT_FIXTURE: &str = "post-tool-use.command.input.schema.json";
 const POST_TOOL_USE_OUTPUT_FIXTURE: &str = "post-tool-use.command.output.schema.json";
+const PERMISSION_REQUEST_INPUT_FIXTURE: &str = "permission-request.command.input.schema.json";
+const PERMISSION_REQUEST_OUTPUT_FIXTURE: &str = "permission-request.command.output.schema.json";
 const PRE_TOOL_USE_INPUT_FIXTURE: &str = "pre-tool-use.command.input.schema.json";
 const PRE_TOOL_USE_OUTPUT_FIXTURE: &str = "pre-tool-use.command.output.schema.json";
 const SESSION_START_INPUT_FIXTURE: &str = "session-start.command.input.schema.json";
@@ -69,6 +71,8 @@ pub(crate) struct HookUniversalOutputWire {
 pub(crate) enum HookEventNameWire {
     #[serde(rename = "PreToolUse")]
     PreToolUse,
+    #[serde(rename = "PermissionRequest")]
+    PermissionRequest,
     #[serde(rename = "PostToolUse")]
     PostToolUse,
     #[serde(rename = "SessionStart")]
@@ -109,6 +113,58 @@ pub(crate) struct PostToolUseCommandOutputWire {
     pub hook_specific_output: Option<PostToolUseHookSpecificOutputWire>,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
+#[serde(rename_all = "camelCase")]
+#[serde(deny_unknown_fields)]
+#[schemars(rename = "permission-request.command.output")]
+pub(crate) struct PermissionRequestCommandOutputWire {
+    #[serde(flatten)]
+    pub universal: HookUniversalOutputWire,
+    #[serde(default)]
+    pub hook_specific_output: Option<PermissionRequestHookSpecificOutputWire>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
+#[serde(rename_all = "camelCase")]
+#[serde(deny_unknown_fields)]
+pub(crate) struct PermissionRequestHookSpecificOutputWire {
+    pub hook_event_name: HookEventNameWire,
+    #[serde(default)]
+    pub decision: Option<PermissionRequestDecisionWire>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
+#[serde(rename_all = "camelCase")]
+#[serde(deny_unknown_fields)]
+pub(crate) struct PermissionRequestDecisionWire {
+    pub behavior: PermissionRequestBehaviorWire,
+    /// Reserved for a future input-rewrite capability.
+    ///
+    /// PermissionRequest hooks currently fail closed if this field is present.
+    #[serde(default)]
+    pub updated_input: Option<Value>,
+    /// Reserved for a future permission-rewrite capability.
+    ///
+    /// PermissionRequest hooks currently fail closed if this field is present.
+    #[serde(default)]
+    pub updated_permissions: Option<Value>,
+    #[serde(default)]
+    pub message: Option<String>,
+    /// Reserved for future short-circuiting semantics.
+    ///
+    /// PermissionRequest hooks currently fail closed if this field is `true`.
+    #[serde(default)]
+    pub interrupt: bool,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
+pub(crate) enum PermissionRequestBehaviorWire {
+    #[serde(rename = "allow")]
+    Allow,
+    #[serde(rename = "deny")]
+    Deny,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
 #[serde(rename_all = "camelCase")]
 #[serde(deny_unknown_fields)]
@@ -181,6 +237,34 @@ pub(crate) struct PreToolUseCommandInput {
     pub tool_use_id: String,
 }
 
+#[derive(Debug, Clone, Serialize, JsonSchema)]
+#[serde(rename_all = "camelCase")]
+#[serde(deny_unknown_fields)]
+pub(crate) struct PermissionRequestToolInput {
+    pub command: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub description: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, JsonSchema)]
+#[serde(deny_unknown_fields)]
+#[schemars(rename = "permission-request.command.input")]
+pub(crate) struct PermissionRequestCommandInput {
+    pub session_id: String,
+    /// Codex extension: expose the active turn id to internal turn-scoped hooks.
+    pub turn_id: String,
+    pub transcript_path: NullableString,
+    pub cwd: String,
+    #[schemars(schema_with = "permission_request_hook_event_name_schema")]
+    pub hook_event_name: String,
+    pub model: String,
+    #[schemars(schema_with = "permission_mode_schema")]
+    pub permission_mode: String,
+    #[schemars(schema_with = "permission_request_tool_name_schema")]
+    pub tool_name: String,
+    pub tool_input: PermissionRequestToolInput,
+}
+
 #[derive(Debug, Clone, Serialize, JsonSchema)]
 #[serde(rename_all = "camelCase")]
 #[serde(deny_unknown_fields)]
@@ -358,6 +442,14 @@ pub fn write_schema_fixtures(schema_root: &Path) -> anyhow::Result<()> {
         &generated_dir.join(POST_TOOL_USE_OUTPUT_FIXTURE),
         schema_json::<PostToolUseCommandOutputWire>()?,
     )?;
+    write_schema(
+        &generated_dir.join(PERMISSION_REQUEST_INPUT_FIXTURE),
+        schema_json::<PermissionRequestCommandInput>()?,
+    )?;
+    write_schema(
+        &generated_dir.join(PERMISSION_REQUEST_OUTPUT_FIXTURE),
+        schema_json::<PermissionRequestCommandOutputWire>()?,
+    )?;
     write_schema(
         &generated_dir.join(PRE_TOOL_USE_INPUT_FIXTURE),
         schema_json::<PreToolUseCommandInput>()?,
@@ -461,10 +553,18 @@ fn pre_tool_use_hook_event_name_schema(_gen: &mut SchemaGenerator) -> Schema {
     string_const_schema("PreToolUse")
 }
 
+fn permission_request_hook_event_name_schema(_gen: &mut SchemaGenerator) -> Schema {
+    string_const_schema("PermissionRequest")
+}
+
 fn pre_tool_use_tool_name_schema(_gen: &mut SchemaGenerator) -> Schema {
     string_const_schema("Bash")
 }
 
+fn permission_request_tool_name_schema(_gen: &mut SchemaGenerator) -> Schema {
+    string_const_schema("Bash")
+}
+
 fn user_prompt_submit_hook_event_name_schema(_gen: &mut SchemaGenerator) -> Schema {
     string_const_schema("UserPromptSubmit")
 }
@@ -516,10 +616,13 @@ fn default_continue() -> bool {
 
 #[cfg(test)]
 mod tests {
+    use super::PERMISSION_REQUEST_INPUT_FIXTURE;
+    use super::PERMISSION_REQUEST_OUTPUT_FIXTURE;
     use super::POST_TOOL_USE_INPUT_FIXTURE;
     use super::POST_TOOL_USE_OUTPUT_FIXTURE;
     use super::PRE_TOOL_USE_INPUT_FIXTURE;
     use super::PRE_TOOL_USE_OUTPUT_FIXTURE;
+    use super::PermissionRequestCommandInput;
     use super::PostToolUseCommandInput;
     use super::PreToolUseCommandInput;
     use super::SESSION_START_INPUT_FIXTURE;
@@ -544,6 +647,12 @@ mod tests {
             POST_TOOL_USE_OUTPUT_FIXTURE => {
                 include_str!("../schema/generated/post-tool-use.command.output.schema.json")
             }
+            PERMISSION_REQUEST_INPUT_FIXTURE => {
+                include_str!("../schema/generated/permission-request.command.input.schema.json")
+            }
+            PERMISSION_REQUEST_OUTPUT_FIXTURE => {
+                include_str!("../schema/generated/permission-request.command.output.schema.json")
+            }
             PRE_TOOL_USE_INPUT_FIXTURE => {
                 include_str!("../schema/generated/pre-tool-use.command.input.schema.json")
             }
@@ -585,6 +694,8 @@ mod tests {
         for fixture in [
             POST_TOOL_USE_INPUT_FIXTURE,
             POST_TOOL_USE_OUTPUT_FIXTURE,
+            PERMISSION_REQUEST_INPUT_FIXTURE,
+            PERMISSION_REQUEST_OUTPUT_FIXTURE,
             PRE_TOOL_USE_INPUT_FIXTURE,
             PRE_TOOL_USE_OUTPUT_FIXTURE,
             SESSION_START_INPUT_FIXTURE,
@@ -615,6 +726,11 @@ mod tests {
                 .expect("serialize post tool use input schema"),
         )
         .expect("parse post tool use input schema");
+        let permission_request: Value = serde_json::from_slice(
+            &schema_json::<PermissionRequestCommandInput>()
+                .expect("serialize permission request input schema"),
+        )
+        .expect("parse permission request input schema");
         let user_prompt_submit: Value = serde_json::from_slice(
             &schema_json::<UserPromptSubmitCommandInput>()
                 .expect("serialize user prompt submit input schema"),
@@ -625,7 +741,13 @@ mod tests {
         )
         .expect("parse stop input schema");
 
-        for schema in [&pre_tool_use, &post_tool_use, &user_prompt_submit, &stop] {
+        for schema in [
+            &pre_tool_use,
+            &permission_request,
+            &post_tool_use,
+            &user_prompt_submit,
+            &stop,
+        ] {
             assert_eq!(schema["properties"]["turn_id"]["type"], "string");
             assert!(
                 schema["required"]

codex-rs/protocol/src/protocol.rs

@@ -1620,6 +1620,7 @@ pub enum EventMsg {
 #[serde(rename_all = "snake_case")]
 pub enum HookEventName {
     PreToolUse,
+    PermissionRequest,
     PostToolUse,
     SessionStart,
     UserPromptSubmit,

codex-rs/tui/src/chatwidget/tests/helpers.rs

@@ -1068,6 +1068,7 @@ pub(super) async fn assert_hook_events_snapshot(
 fn hook_event_label(event_name: codex_protocol::protocol::HookEventName) -> &'static str {
     match event_name {
         codex_protocol::protocol::HookEventName::PreToolUse => "PreToolUse",
+        codex_protocol::protocol::HookEventName::PermissionRequest => "PermissionRequest",
         codex_protocol::protocol::HookEventName::PostToolUse => "PostToolUse",
         codex_protocol::protocol::HookEventName::SessionStart => "SessionStart",
         codex_protocol::protocol::HookEventName::UserPromptSubmit => "UserPromptSubmit",

codex-rs/tui/src/history_cell/hook_cell.rs

@@ -701,6 +701,7 @@ fn hook_output_prefix(kind: HookOutputEntryKind) -> &'static str {
 fn hook_event_label(event_name: HookEventName) -> &'static str {
     match event_name {
         HookEventName::PreToolUse => "PreToolUse",
+        HookEventName::PermissionRequest => "PermissionRequest",
         HookEventName::PostToolUse => "PostToolUse",
         HookEventName::SessionStart => "SessionStart",
         HookEventName::UserPromptSubmit => "UserPromptSubmit",