# Codemod Semantic Providers > Use when changing Codemod semantic analysis providers, language-core traits, JavaScript/TypeScript provider behavior, Python provider behavior, semantic-factory routing, tree-sitter loader behavior, goto-definition, find-references, or semantic integration tests. - Skill: `tomevault-io/codemod-semantic-providers` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/codemod-semantic-providers` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/codemod-semantic-providers/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Integrations & APIs - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/codemod-semantic-providers --- # Codemod Semantic Providers ## Key Areas - Shared traits and types: `crates/language-core` - JavaScript/TypeScript provider: `crates/language-javascript` - Python provider: `crates/language-python` - Provider selection: `crates/semantic-factory` - Parser loading: `crates/tree-sitter-loader` - Integration tests: `crates/codemod-sandbox/tests/integration/semantic` ## Rules - Keep `language-core` language-neutral. - Preserve provider contracts for goto-definition, find-references, file identity, and virtual filesystem behavior. - Do not silently fall back to a different semantic provider when initialization fails. - Add fixtures for imports, aliases, workspace roots, ambiguous references, and false positives when behavior changes. - JavaScript provider changes should consider OXC resolver and Yarn PnP behavior. - Python provider changes should keep Ruff/ty integration narrow and version-aware. - Do not print directly to stdout/stderr from provider code. Return diagnostics or errors to callers so `crates/cli` can preserve TUI and JSONL output modes. ## Validation - Provider crates: `cargo test -p language-core -p language-javascript -p language-python -p semantic-factory` - Sandbox semantic integration: `cargo test -p codemod-sandbox semantic` - Factory only: `cargo test -p semantic-factory` --- > Source: [codemod/codemod](https://github.com/codemod/codemod) — distributed by [TomeVault](https://tomevault.io).