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[hooks] add non-streaming (non-stdin style) shell-only PreToolUse support (#15211)
- add `PreToolUse` hook for bash-like tool execution only at first - block shell execution before dispatch with deny-only hook behavior - introduces common.rs matcher framework for matching when hooks are run example run: ``` › run three parallel echo commands, and the second one should echo "[block-pre-tool-use]" as a test • Running the three echo commands in parallel now and I’ll report the output directly. • Running PreToolUse hook: name for demo pre tool use hook • Running PreToolUse hook: name for demo pre tool use hook • Running PreToolUse hook: name for demo pre tool use hook PreToolUse hook (completed) warning: wizard-tower PreToolUse demo inspected Bash: echo "first parallel echo" 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 "third parallel echo" • Ran echo "first parallel echo" └ first parallel echo • Ran echo "third parallel echo" └ third parallel echo • Three little waves went out in parallel. 1. printed first parallel echo 2. was blocked before execution because it contained the exact test string [block-pre-tool-use] 3. printed third parallel echo There was also an unrelated macOS defaults warning around the successful commands, but the echoes themselves worked fine. If you want, I can rerun the second one with a slightly modified string so it passes cleanly. ```
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{
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"$schema": "http://json-schema.org/draft-07/schema#",
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"additionalProperties": false,
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"definitions": {
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"HookEventNameWire": {
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"enum": [
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"PreToolUse",
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"SessionStart",
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"UserPromptSubmit",
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"Stop"
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],
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"type": "string"
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},
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"PreToolUseDecisionWire": {
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"enum": [
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"approve",
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"block"
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],
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"type": "string"
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},
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"PreToolUseHookSpecificOutputWire": {
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"additionalProperties": false,
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"properties": {
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"additionalContext": {
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"default": null,
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"type": "string"
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},
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"hookEventName": {
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"$ref": "#/definitions/HookEventNameWire"
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},
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"permissionDecision": {
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"allOf": [
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{
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"$ref": "#/definitions/PreToolUsePermissionDecisionWire"
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}
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],
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"default": null
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},
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"permissionDecisionReason": {
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"default": null,
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"type": "string"
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},
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"updatedInput": {
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"default": null
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}
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},
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"required": [
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"hookEventName"
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],
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"type": "object"
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},
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"PreToolUsePermissionDecisionWire": {
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"enum": [
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"allow",
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"deny",
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"ask"
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],
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"type": "string"
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}
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},
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"properties": {
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"continue": {
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"default": true,
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"type": "boolean"
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},
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"decision": {
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"allOf": [
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{
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"$ref": "#/definitions/PreToolUseDecisionWire"
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}
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],
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"default": null
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},
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"hookSpecificOutput": {
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"allOf": [
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{
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"$ref": "#/definitions/PreToolUseHookSpecificOutputWire"
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}
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],
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"default": null
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},
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"reason": {
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"default": null,
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"type": "string"
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},
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"stopReason": {
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"default": null,
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"type": "string"
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},
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"suppressOutput": {
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"default": false,
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"type": "boolean"
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},
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"systemMessage": {
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"default": null,
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"type": "string"
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}
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},
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"title": "pre-tool-use.command.output",
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"type": "object"
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}
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