@W-21102094 - Add PMD XPath custom rule creation tool with AST prompt generation#381
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* extractAstNodes from xml implementation * optimize the method using regex * extract ast nodes from xml
* mcp tool added in provider * add GenerateXpathPromptMcpTool in test * update test
* get metadata of ast nodes of apex langugae * pmd apex ast cache
* implemented create custom rule tool * test update
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* add validation that this implementation supports pmd only for now * update prompt - optimize for output size * refactor create tool * file name santization * updated action name * update prompt * update prompt optimize for simple xpath * fix tests * fix test with mock
…y methods (#386) * langugae in ruleset template * update telemetry on success * xpath is optional * clean chuncky methods
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packages/mcp-provider-code-analyzer/src/tools/create_custom_rule.ts
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nikhil-mittal-165
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Feb 25, 2026
iowillhoit
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Mar 5, 2026
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What does this PR do?
@W-21102094@
What issues does this PR fix or reference?
This PR introduces an end‑to‑end flow for creating PMD XPath custom rules. It generates PMD AST XML from sample Apex code, extracts AST nodes and cached metadata, builds a high‑signal prompt for XPath generation, and then writes a PMD ruleset XML plus updates code-analyzer.yml (with relative custom ruleset paths). It also adds engine strategies/pipeline/adapters to keep the workflow extensible for future engines, along with tests and tool registration updates.
Notes / Future Work
The Apex AST reference JSON is cached locally in the provider to enable prompt enrichment in phase 1. This is a temporary placement and will move into the PMD engine implementation in core once the engine plugin owns AST metadata.
PMD CLI integration is used to generate AST XML in phase 1. This will be replaced by a PMD engine API in core (Java SDK or internal API) so we can avoid external process execution and share logic across tools.