Files
codex/codex-rs/hooks/schema/generated/pre-tool-use.command.output.schema.json
Andrei Eternal c4d9887f9a [hooks] add non-streaming (non-stdin style) shell-only PostToolUse support (#15531)
CHAINED PR - note that base is eternal/hooks-pretooluse-bash, not main
-- so the following PR should be first

Matching post-tool hook to the pre-tool functionality here:
https://github.com/openai/codex/pull/15211

So, PreToolUse calls for plain shell calls, allows blocking. This
PostToolUse call runs after the command executed

example run:

```
› as a test, run in parallel the following commands:
  - echo 'one'
  - echo '[block-pre-tool-use]'
  - echo '[block-post-tool-use]'


⚠ MCP startup incomplete (failed: notion, linear)

• Cruising through those three commands in parallel now, and I’ll share the exact outputs right after
  they land.

• Running PreToolUse hook: checking the observatory runes

• Running PreToolUse hook: checking the observatory runes

• Running PreToolUse hook: checking the observatory runes

PreToolUse hook (blocked)
  warning: wizard-tower PreToolUse demo blocked a Bash command on purpose.
  feedback: PreToolUse demo blocked the command. Remove [block-pre-tool-use] to continue.

PreToolUse hook (completed)
  warning: wizard-tower PreToolUse demo inspected Bash: echo 'one'

PreToolUse hook (completed)
  warning: wizard-tower PreToolUse demo inspected Bash: echo '[block-post-tool-use]'

• Ran echo '[block-post-tool-use]'
  └ [block-post-tool-use]

• Ran echo 'one'
  └ one

• Running PostToolUse hook: reading the observatory aftermath

• Running PostToolUse hook: reading the observatory aftermath

PostToolUse hook (blocked)
  warning: wizard-tower PostToolUse demo blocked the Bash follow-through on purpose.
  feedback: PostToolUse demo blocked the result after execution. Remove [block-post-tool-use] to
continue.

PostToolUse hook (completed)
  warning: wizard-tower PostToolUse demo inspected Bash: echo 'one'
  hook context: PostToolUse demo saw the Bash result. Response preview: one

──────────────────────────────────────────────────────────────────────────────────────────────────────

• Ran them in parallel. Little wave report:

  - echo 'one' completed and returned one.
  - echo '[block-pre-tool-use]' was blocked before execution by the PreToolUse hook.
  - echo '[block-post-tool-use]' ran, but its result was blocked afterward by the PostToolUse hook.

  The hook messages were:

  - PreToolUse demo blocked the command. Remove [block-pre-tool-use] to continue.
  - PostToolUse demo blocked the result after execution. Remove [block-post-tool-use] to continue.


› for the blocked messages (correctly blocked in this test) did the tool output land back into
  context?


• Yeah, from this run:

  - PreToolUse block: the command itself did not execute, so no command output landed in context. Only
    the block message did.
  - PostToolUse block: the command did execute, but the actual stdout did not come back into context.
    Only the post-tool block message did.

  So the blocked notifications landed in context, but the blocked command payloads themselves did not.
  Nice clean guardrail, aloha.
```
2026-03-25 19:18:03 -07:00

102 lines
2.0 KiB
JSON

{
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"definitions": {
"HookEventNameWire": {
"enum": [
"PreToolUse",
"PostToolUse",
"SessionStart",
"UserPromptSubmit",
"Stop"
],
"type": "string"
},
"PreToolUseDecisionWire": {
"enum": [
"approve",
"block"
],
"type": "string"
},
"PreToolUseHookSpecificOutputWire": {
"additionalProperties": false,
"properties": {
"additionalContext": {
"default": null,
"type": "string"
},
"hookEventName": {
"$ref": "#/definitions/HookEventNameWire"
},
"permissionDecision": {
"allOf": [
{
"$ref": "#/definitions/PreToolUsePermissionDecisionWire"
}
],
"default": null
},
"permissionDecisionReason": {
"default": null,
"type": "string"
},
"updatedInput": {
"default": null
}
},
"required": [
"hookEventName"
],
"type": "object"
},
"PreToolUsePermissionDecisionWire": {
"enum": [
"allow",
"deny",
"ask"
],
"type": "string"
}
},
"properties": {
"continue": {
"default": true,
"type": "boolean"
},
"decision": {
"allOf": [
{
"$ref": "#/definitions/PreToolUseDecisionWire"
}
],
"default": null
},
"hookSpecificOutput": {
"allOf": [
{
"$ref": "#/definitions/PreToolUseHookSpecificOutputWire"
}
],
"default": null
},
"reason": {
"default": null,
"type": "string"
},
"stopReason": {
"default": null,
"type": "string"
},
"suppressOutput": {
"default": false,
"type": "boolean"
},
"systemMessage": {
"default": null,
"type": "string"
}
},
"title": "pre-tool-use.command.output",
"type": "object"
}