fix: properly type-check Bash tool input without type assertion #28
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- Remove unused BashToolInput import - Use inline type assertion with property check to avoid "as unknown as" pattern - Ensures type safety while maintaining readability 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>
WalkthroughThe code updates simplify the type casting for the Changes
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Actionable comments posted: 1
🧹 Nitpick comments (1)
templates/hooks/index.ts (1)
31-34: Substring check is trivially bypassed—tighten the dangerous-command filterAttackers can slip through with minor variations (
rm -rf /,rm -rf / --no-preserve-root, path globs, etc.). A simple regex closes obvious holes:- if (command.includes('rm -rf /') || command.includes('rm -rf ~')) { + const dangerous = /\brm\s+-rf\s+([/~]|--no-preserve-root\b|\*)/; + if (dangerous.test(command)) {Consider expanding the deny-list or integrating a proper shell-parser if security is critical.
[security]
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templates/hooks/index.ts(1 hunks)
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`templates/**/*`: Hook templates must be stored in the 'templates/' directory and are copied to the user's '.claude/' directory during initialization.
templates/**/*: Hook templates must be stored in the 'templates/' directory and are copied to the user's '.claude/' directory during initialization.
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List of files the instruction was applied to:
templates/hooks/index.ts
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| if (payload.tool_name === 'Bash' && payload.tool_input && 'command' in payload.tool_input) { | ||
| const bashInput = payload.tool_input as BashToolInput | ||
| const command = bashInput.command | ||
| const command = (payload.tool_input as {command: string}).command | ||
| console.log(`🚀 Running command: ${command}`) |
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🛠️ Refactor suggestion
Prefer a type-guard to eliminate the unsafe cast
The direct assertion (payload.tool_input as {command: string}).command silently trusts the payload’s shape. A tiny, locally-scoped type-guard keeps the compiler on your side and avoids re-introducing the deprecated double-assertion pattern:
-type BashToolInput = {command: string}
-function isBashToolInput(input: unknown): input is BashToolInput {
- return !!input && typeof (input as any).command === 'string'
-}
-
-if (payload.tool_name === 'Bash' && isBashToolInput(payload.tool_input)) {
- const {command} = payload.tool_input
+type BashToolInput = {command: string}
+function isBashToolInput(input: unknown): input is BashToolInput {
+ return !!input && typeof (input as any).command === 'string'
+}
+
+if (payload.tool_name === 'Bash' && isBashToolInput(payload.tool_input)) {
+ const {command} = payload.tool_input
console.log(`🚀 Running command: ${command}`)This keeps the file self-contained (no additional import) while giving the compiler a real guard instead of a blind cast.
Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In templates/hooks/index.ts around lines 26 to 28, replace the direct type
assertion of payload.tool_input with a locally defined type-guard function that
checks if tool_input has a command property of type string. Use this type-guard
to safely access the command property without casting, ensuring type safety and
avoiding deprecated double-assertion patterns.
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🎉 This PR is included in version 1.2.3 🎉 The release is available on: Your semantic-release bot 📦🚀 |
Summary
as unknown astype assertion with inline type check using'command' in payload.tool_inputas {command: string}for cleaner, more readable codeTest plan
bun run lintto ensure no linting issues🤖 Generated with Claude Code
Summary by CodeRabbit