| name | deps-upgrade |
| description | Upgrade all project dependencies across Mix/Hex, npm applications including Phoenix assets and browser extensions, and Tailwind. Use when asked to update, upgrade, or modernize every dependency and repair resulting code, configuration, or test breakage. |
Dependency Upgrade
Upgrade every discovered dependency while preserving unrelated work. Do not commit, push, or open pull requests unless explicitly asked.
Inventory and protect scope
- Read repository instructions and snapshot
git status --short plus relevant diffs. Preserve all unrelated staged, unstaged, and untracked changes.
- Find every manifest, lockfile, workspace, umbrella app, Phoenix assets directory, and browser-extension package. Include nested
mix.exs, package.json, npm workspaces, and lockfiles; do not assume conventional paths.
- Inventory outdated Mix and npm dependencies. Identify coupled packages, constraints, generated files, and app-specific checks.
- Locate Tailwind in every form: an npm dependency, the Phoenix
tailwind Hex wrapper, and any configured standalone binary version. Check each independently against a newer compatible or current release.
Upgrade Mix and Hex
Prefer the installed Elixir/Phoenix updater: invoke $elixir-phoenix:phx-deps-update in Codex or /phx:deps-update in Claude/Grok. Use its inventory, update, breaking-fix, and verification phases. Run or select scopes as needed until every outdated group, including coupled groups, is covered. Skip its commit/PR actions unless explicitly requested, leaving reviewed working-tree changes only.
If that updater is unavailable, perform a concise best-effort fallback:
- Run
mix hex.outdated --all, treating its outdated exit status as inventory rather than failure.
- Read release and migration notes before major or coupled upgrades. Edit constraints when needed, then use canonical Mix commands.
- Inspect the actual
mix.lock diff, fix breaking API/configuration changes, and keep source, manifest, and lockfile edits together in the working tree.
After either path, update the Phoenix tailwind Hex wrapper and configured standalone version when newer compatible/current versions exist. Reinstall or exercise the binary through the project's Mix tasks.
Upgrade npm and Tailwind
For every npm app or workspace, including Phoenix assets and browser extensions:
- Inventory outdated packages and inspect release or migration notes for breaking upgrades.
- Upgrade direct dependencies to appropriate current versions, including Tailwind and its plugins. Respect compatibility and engine constraints; report blocked upgrades.
- Regenerate each lockfile with the repository's canonical package-manager command. Never hand-edit a generated lockfile.
- Apply required source, build configuration, CSS, extension manifest, and test changes. Follow the applicable Tailwind migration steps rather than merely changing its version.
Verify and report
Run repository-defined formatting, compile/static analysis, tests, and relevant builds for every affected Mix and npm app. Exercise every affected Tailwind integration. Fix upgrade-caused failures within scope.
Re-run all outdated inventories at the end. Review the final status and diff to confirm lockfiles are canonical, requested ecosystems were covered, and unrelated changes remain intact. Report upgraded and blocked dependencies, migrations performed, checks passed or failed, and anything not verified.
