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[hooks] use a user message > developer message for prompt continuation (#14867)

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## Summary

Persist Stop-hook continuation prompts as `user` messages instead of
hidden `developer` messages + some requested integration tests

This is a followup to @pakrym 's comment in
https://github.com/openai/codex/pull/14532 to make sure stop-block
continuation prompts match training for turn loops

- Stop continuation now writes `<hook_prompt hook_run_id="...">stop
hook's user prompt<hook_prompt>`
- Introduces quick-xml dependency, though we already indirectly depended
on it anyway via syntect
- This PR only has about 500 lines of actual logic changes, the rest is
tests/schema

## Testing

Example run (with a sessionstart hook and 3 stop hooks) - this shows
context added by session start, then two stop hooks sending their own
additional prompts in a new turn. The model responds with a single
message addressing both. Then when that turn ends, the hooks detect that
they just ran using `stop_hook_active` and decide not to infinite loop

test files for this (unzip, move codex -> .codex):
[codex.zip](https://github.com/user-attachments/files/26075806/codex.zip)

```
› cats


• Running SessionStart hook: lighting the observatory

SessionStart hook (completed)
  warning: Hi, I'm a session start hook for wizard-tower (startup).
  hook context: A wimboltine stonpet is an exotic cuisine from hyperspace

• Cats are tiny zen wizards, my friend: equal parts nap, mystery, and chaos. If you want, we can talk
  cat facts, cat breeds, cat names, or build something cat-themed in this repo.

• Running Stop hook: checking the tower wards

• Running Stop hook: sacking the guards

• Running Stop hook: hiring the guards

Stop hook (completed)
  warning: Wizard Tower Stop hook reviewed the completed reply (177 chars).

Stop hook (blocked)
  warning: Wizard Tower Stop hook continuing conversation
  feedback: cook the stonpet

Stop hook (blocked)
  warning: Wizard Tower Stop hook continuing conversation
  feedback: eat the cooked stonpet

• Stonpet’s cooked, aloha style: flash-seared over a blue quasiflame, glazed with nebula salt, and
  rested until the hyperspace juices settle.

  Now we eat with gratitude, my friend. One mindful bite in, and the flavor is pure cosmic surf:
  smoky, bright, and totally out of this dimension.

• Running Stop hook: checking the tower wards

• Running Stop hook: sacking the guards

• Running Stop hook: hiring the guards

Stop hook (completed)
  warning: Wizard Tower Stop hook reviewed the completed reply (285 chars).

Stop hook (completed)
  warning: Wizard Tower Stop hook saw a second pass and stayed calm to avoid a loop.

Stop hook (completed)
  warning: Wizard Tower Stop hook saw a second pass and stayed calm to avoid a loop.
```
This commit is contained in:
Andrei Eternal
2026-03-19 10:53:08 -07:00
committed by GitHub
parent 5ec121ba12
commit 267499bed8
41 changed files with 1533 additions and 91 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
codex-rs/app-server-protocol/schema/json/ServerNotification.json
View File

@@ -1201,6 +1201,21 @@
],
"type": "string"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"HookRunStatus": {
"enum": [
"running",
@@ -2257,6 +2272,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
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@@ -7971,6 +7971,21 @@
],
"type": "string"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"HookRunStatus": {
"enum": [
"running",
@@ -11954,6 +11969,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/v2/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json
View File

@@ -4715,6 +4715,21 @@
],
"type": "string"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"HookRunStatus": {
"enum": [
"running",
@@ -9714,6 +9729,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ItemCompletedNotification.json
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@@ -266,6 +266,21 @@
],
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -496,6 +511,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ItemStartedNotification.json
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@@ -266,6 +266,21 @@
],
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -496,6 +511,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ReviewStartResponse.json
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@@ -380,6 +380,21 @@
],
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -610,6 +625,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ThreadForkResponse.json
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@@ -465,6 +465,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -1103,6 +1118,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ThreadListResponse.json
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@@ -403,6 +403,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -861,6 +876,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ThreadMetadataUpdateResponse.json
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@@ -403,6 +403,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -861,6 +876,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ThreadReadResponse.json
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@@ -403,6 +403,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -861,6 +876,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ThreadResumeResponse.json
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@@ -465,6 +465,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -1103,6 +1118,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/ThreadRollbackResponse.json
View File

@@ -403,6 +403,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -861,6 +876,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

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codex-rs/app-server-protocol/schema/json/v2/ThreadStartResponse.json
View File

@@ -465,6 +465,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -1103,6 +1118,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

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codex-rs/app-server-protocol/schema/json/v2/ThreadStartedNotification.json
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@@ -403,6 +403,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -861,6 +876,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

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codex-rs/app-server-protocol/schema/json/v2/ThreadUnarchiveResponse.json
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@@ -403,6 +403,21 @@
},
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -861,6 +876,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

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codex-rs/app-server-protocol/schema/json/v2/TurnCompletedNotification.json
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@@ -380,6 +380,21 @@
],
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -610,6 +625,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

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codex-rs/app-server-protocol/schema/json/v2/TurnStartResponse.json
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@@ -380,6 +380,21 @@
],
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -610,6 +625,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {

42
codex-rs/app-server-protocol/schema/json/v2/TurnStartedNotification.json
View File

@@ -380,6 +380,21 @@
],
"type": "object"
},
"HookPromptFragment": {
"properties": {
"hookRunId": {
"type": "string"
},
"text": {
"type": "string"
}
},
"required": [
"hookRunId",
"text"
],
"type": "object"
},
"McpToolCallError": {
"properties": {
"message": {
@@ -610,6 +625,33 @@
"title": "UserMessageThreadItem",
"type": "object"
},
{
"properties": {
"fragments": {
"items": {
"$ref": "#/definitions/HookPromptFragment"
},
"type": "array"
},
"id": {
"type": "string"
},
"type": {
"enum": [
"hookPrompt"
],
"title": "HookPromptThreadItemType",
"type": "string"
}
},
"required": [
"fragments",
"id",
"type"
],
"title": "HookPromptThreadItem",
"type": "object"
},
{
"properties": {
"id": {