Claude Code Hooksでテストを自動実行する方法：PostToolUse、Stop、最小検証フロー

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npm test

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your-repo/
  .claude/
    settings.json
    hooks/
      run-related-tests.sh
      final-check.sh

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your-repo/
  .claude/
    settings.json
    hooks/
      run-related-tests.ps1
      final-check.ps1

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{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Edit|Write",
        "hooks": [
          {
            "type": "command",
            "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/run-related-tests.sh"
          }
        ]
      }
    ]
  }
}

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#!/usr/bin/env bash
set -euo pipefail

INPUT="$(cat)"
FILE_PATH="$(printf '%s' "$INPUT" | jq -r '.tool_input.file_path // empty')"

if [ -z "$FILE_PATH" ]; then
  exit 0
fi

case "$FILE_PATH" in
  *.ts|*.tsx)
    echo "Running TypeScript checks for $FILE_PATH"
    npm run typecheck -- --pretty false
    ;;
  *.test.ts|*.spec.ts|*.test.tsx|*.spec.tsx)
    echo "Running focused test for $FILE_PATH"
    npm test -- "$FILE_PATH" --runInBand
    ;;
  *.py)
    echo "Running Python checks for $FILE_PATH"
    python -m pytest -q
    ;;
  *.md)
    echo "Markdown changed: skip code tests"
    ;;
  *)
    echo "No related test rule for $FILE_PATH"
    ;;
esac

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chmod +x .claude/hooks/run-related-tests.sh

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$inputJson = [Console]::In.ReadToEnd()
if ([string]::IsNullOrWhiteSpace($inputJson)) {
  exit 0
}

$payload = $inputJson | ConvertFrom-Json
$filePath = $payload.tool_input.file_path

if ([string]::IsNullOrWhiteSpace($filePath)) {
  exit 0
}

switch -Regex ($filePath) {
  '\.tsx?$' {
    Write-Output "Running TypeScript checks for $filePath"
    npm run typecheck -- --pretty false
    break
  }
  '\.(test|spec)\.tsx?$' {
    Write-Output "Running focused test for $filePath"
    npm test -- $filePath --runInBand
    break
  }
  '\.py$' {
    Write-Output "Running Python checks for $filePath"
    python -m pytest -q
    break
  }
  '\.md$' {
    Write-Output "Markdown changed: skip code tests"
    break
  }
  default {
    Write-Output "No related test rule for $filePath"
  }
}

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{
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Edit|Write",
        "hooks": [
          {
            "type": "command",
            "command": "powershell.exe -ExecutionPolicy Bypass -File \"$CLAUDE_PROJECT_DIR/.claude/hooks/run-related-tests.ps1\""
          }
        ]
      }
    ]
  }
}

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npm test -- "$FILE_PATH" --runInBand 2>&1 | tail -n 80

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{
  "hooks": {
    "Stop": [
      {
        "matcher": "",
        "hooks": [
          {
            "type": "command",
            "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/final-check.sh"
          }
        ]
      }
    ]
  }
}

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#!/usr/bin/env bash
set -euo pipefail

if git diff --quiet; then
  echo "No working tree changes. Skip final checks."
  exit 0
fi

echo "Working tree changed. Suggested final checks:"
echo "- run the focused test command for touched files"
echo "- run typecheck if code changed"
echo "- run full test suite before commit or deploy"

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変更後は最小の関連テストを優先する。
テスト失敗時は回避せず原因を直す。
ユーザーが要求しない限り、小さな変更で全量E2Eを走らせない。

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EditまたはWriteの後にrun-related-tests.shを実行する。
Stop時に最終チェック候補を出す。