jar-explore

JAR Content Inspection

Use ${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore for reading raw JAR contents. Do NOT use unzip, jar tf, or jar xf directly.

For class search and decompilation, use the maven-indexer MCP server instead:

• Finding classes by name → search_classes
• Decompiling classes to source → get_class_details (type: "source")
• Finding JARs by coordinates → search_artifacts
• Finding interface implementations → search_implementations

This tool covers what the MCP server doesn't: listing raw entries, regex search within a JAR, and reading arbitrary non-class files.

Subcommands

List all entries

${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore list /path/to/file.jar

Search for entries matching a pattern

${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore search /path/to/file.jar "ClassName"
${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore search /path/to/file.jar "META-INF.*\.properties"

Pattern is a case-insensitive extended regex.

Read a file from a JAR (no extraction to disk)

${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore read /path/to/file.jar com/example/MyClass.java
${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore read /path/to/file.jar META-INF/MANIFEST.MF
${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore read /path/to/file.jar META-INF/spring.factories
${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore read /path/to/file.jar application.properties

Typical workflow

1. Get the JAR path from maven-indexer (search_artifacts) or the project build output
2. Browse contents: ${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore list <jar> or ${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore search <jar> <pattern>
3. Read a specific file: ${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore read <jar> <entry>

Exit codes

• 0: Success
• 1: Bad usage / invalid arguments
• 2: File or path not found
• 3: Entry not found in JAR

Hook auto-approval

Commands using ${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore can be auto-approved in Claude Code hooks by matching the command prefix ${CLAUDE_PLUGIN_ROOT}/scripts/jar-explore. This is safe because the script is read-only (stdout output only, no disk writes).