MCP SERVERRead the TypeScript options that actually apply after every extends is resolved — including the ones set two levels up in a monorepo.
LABSCO SUMMARY
A tsconfig with one extends line can carry strict mode, noUncheckedIndexedAccess and a baseUrl defined somewhere else entirely; this flattens all of it, so suggestions are made against the rules the build will actually enforce.
A resolver for TypeScript configuration. It follows the whole extends chain — your config, the monorepo base, the preset in node_modules — and reports the merged options that really govern a file, using the compiler's own resolution rather than a re-implementation. The running server answers with six tools.
Node, through the published npm package, and a project whose dependencies are installed — presets extended from node_modules have to be on disk to be resolved.
One command — npx -y tsconfig-inheritance-flattener-mcp
USE CASES
Resolve the full extends chain and read the merged options — target, module resolution, strictness flags — instead of guessing from the four lines your own tsconfig contains.
Take an alias such as one of your @/ paths and get the file on disk it resolves to, with all candidates listed when more than one extension matches.
Run the compiler's exact resolution algorithm for the one import that fails, and read the path it lands on — or does not — rather than bisecting the config by hand.
Check the project references: a referenced package without composite enabled is the usual reason a build refuses to pick up a sibling package.
A file compiled by two tsconfigs at once gets two sets of rules. Find those overlaps and see which options disagree before you go looking for a bug in the code.
See the emitted JavaScript, declaration files and maps per source file before running the build, which is the fastest way to catch an outDir or rootDir that is not doing what you assumed.
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
analyze_project_referencesInspect a tsconfig.json's project references array and validate that each referenced package has composite:true enabled. Detects missing or broken cross-package references in TypeScript monorepos that would cause silent build failures.
detect_config_overlapsFind source files compiled by more than one tsconfig simultaneously and surface option conflicts (strict, module, target, etc.) between them. Essential for monorepos where tsconfig.app.json and tsconfig.spec.json share the same src/ tree with incompatible settings.
explain_emission_structureBuild a virtual tree of what TypeScript will emit for each source file — compiled JS, declaration (.d.ts), and source map paths — without running the compiler. Useful when an agent needs to predict where output files will land or debug rootDir/outDir misconfigurations.
get_effective_compiler_optionsResolve the full tsconfig.json inheritance chain and return the final merged compiler options that actually apply — including options inherited from extended base configs in node_modules or monorepo packages. Eliminates agent hallucinations about strict mode, moduleResolution, paths, and target.
resolve_module_aliasMap a TypeScript path alias (e.g. @/components/Button or @utils/format) to its physical file location on disk, using the paths and baseUrl from the resolved tsconfig. Useful when an agent needs to navigate to the actual file behind an import.
simulate_module_resolutionRun TypeScript's exact module resolution algorithm for a given import and return the resolved file path plus every candidate path that was tried and rejected. Eliminates guesswork about why an import resolves (or fails to resolve) under Node16/NodeNext/Bundler strategies.
BEFORE YOU INSTALL
6 tools when we connected.
npx on PATH
CONTEXT COST
Rated by the size of the 6 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
Add the block to your client, or run the command directly.
{
"mcpServers": {
"tsconfig-inheritance-flattener-mcp": {
"command": "npx",
"args": [
"-y",
"tsconfig-inheritance-flattener-mcp"
]
}
}
}npx -y tsconfig-inheritance-flattener-mcpMCP servers
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