package-manager-yarn4-pnpm89

name	package-manager-yarn4-pnpm89
description	Package manager router for Yarn 4 and pnpm 8.9 workspaces, constraints, and lockfile behavior.

Package Manager Yarn4 Pnpm89

Use when

• task changes dependency graph, workspace linking, or lockfile behavior
• task touches .yarnrc.yml, pnpm-workspace.yaml, root package manager scripts

Do not use when

• task is feature implementation with no dependency/workspace impact
• repo package manager differs from yarn4/pnpm89

Inspect first

• root package.json, lockfile, and manager-specific config files
• workspace definitions and nohoist/public-hoist rules if present
• scripts invoking manager-specific commands

Avoid mistakes

• mixing npm install paths in yarn/pnpm managed repos
• manual lockfile edits that break deterministic installs
• dependency version drift across workspace packages

Router

1. Load references/conventions.md for naming, do/don't, and forbidden patterns.
2. Load references/scope.md for manager-specific targets.
3. Load references/workflow.md only for install/lock/debug flow.
4. Keep lockfile and workspace resolution deterministic.

References

• references/scope.md
• references/workflow.md