Report the EXACT version of a dependency that is installed in the current project right now — read from node_modules (authoritative) or the lockfile — plus the range declared in package.json and, if online, how far behind npm's latest it is. Reach for this BEFORE writing code against a library: the model's training blends many versions and guesses APIs that don't exist in the installed one. Ground on THIS number instead. Set the project with the projectDir arg or the INSTALLED_VERSION_PROJECT env var.

Given the packages you are ABOUT TO import in a file, return the exact installed version of each in this project. Use this at the start of writing/editing a file so every library call is grounded on the version really present. Pass bare import specifiers (e.g. 'react-router-dom', '@aws-sdk/client-s3'); subpaths are normalized to the package.

List every dependency's installed version in this project (from the lockfile), optionally filtered by a substring. Use to audit what's actually present, or to answer 'what version of X is in here' across the whole tree including transitive deps.