Upgrade Packages

Bring all backend, frontend, and GitHub Actions dependencies to their latest versions. The project always runs the latest version of every package. Don't quit, give up, or recommend reverting just because something is non-trivial — research, debug, push through. The only acceptable reasons to skip an upgrade are the permanent exceptions below.

How To Drive The CLI

Every NuGet and npm bump goes through the developer CLI. Run it directly (the Bash hook allows dotnet run --project developer-cli, and the CLI runs its own dotnet/npm subprocesses without tripping the hook):

bash
dotnet run --project developer-cli -- update-packages [--backend|--frontend] [--dry-run] [--exclude <csv>] [--include-major-framework-updates] --quiet

Always pass --quiet. In quiet mode the command prints no tables or banners — only parseable plain-text lines:

<side> <patch|minor|major> <package> <current> -> <new> [<extra>]
<side> restricted <package> <current> (latest <X> is a new major, pinned)
<side> excluded <package> <current>
summary <side> patch=<n> minor=<n> major=<n> excluded=<n> uptodate=<n>

<side> is backend or frontend. restricted lines are the permanent exceptions (pinned to their current major by the CLI). Use a --dry-run --quiet run to plan; parse the major lines to get the package names that need their own commit.

Run the build, format, lint, test, and e2e skills for all verification (never raw dotnet/npm).

Permanent Exceptions

These never move to a new major. The CLI enforces them itself (RestrictedNuGetPackages in developer-cli/Commands/UpdatePackagesCommand.cs), so you do not pass --exclude for them — they show up as restricted lines in the dry-run and are pinned to the latest version within their current major:

• MediatR, FluentAssertions — later majors changed licensing/APIs.
• Microsoft.ApplicationInsights, Microsoft.ApplicationInsights.AspNetCore — the next major drops PageView tracking as part of moving to OpenTelemetry; the codebase uses PageView heavily and that migration is a separate effort.

Note: frontend @microsoft/applicationinsights-* packages are not restricted and upgrade normally. .NET, Node.js, and @types/node stay within their current major unless you pass --include-major-framework-updates; don't cross a framework major as part of a routine package upgrade.

Principles

1. Use update-packages for every bump. Never hand-edit package.json / Directory.Packages.props or run raw npm / dotnet to move a version.
2. The CLI must produce a correct outcome. If it doesn't, fix the CLI in developer-cli/Commands/UpdatePackagesCommand.cs, and commit that fix on its own. Working around a CLI bug by hand is unacceptable — the next person deserves the fix.
3. Order is fixed and never reordered: backend (.NET) first, then frontend, then GitHub Actions last. If the backend is blocked because a new toolchain (a .NET SDK) isn't installed, that install needs sudo/admin — ask the user to run it up front (Workflow step 3) and wait. Never skip ahead to the frontend to "stay busy" while a backend toolchain install is pending.
4. Atomic commits. Trivial bumps (patch + minor) go into one bulk commit per side. Every major — and anything needing a code change, config change, or API rename — gets its own commit with the change.
5. Research majors online. Read the changelog, release notes, and GitHub issues for every major before applying it. If a new major exposes cheap, obvious improvements, adopt them in the same commit. If adoption is non-trivial, ship the upgrade and note the follow-up.
6. Verify smartly, and gate each phase. build + lint per trivial commit; add e2e after majors that touch runtime, build tooling, or i18n; run format whenever code changes or after upgrading formatter/linter tooling. Run a full backend regression with e2e at the end of the backend phase, before the frontend, and a full regression for both sides at the very end. Fold any fix into the commit that caused it (see Fixing A Regression).
7. Push through. When an upgrade misbehaves, figure out why. Reverting is the last resort, only after evidence the version is genuinely unusable.

Fixing A Regression

When a regression run fails, the bad change belongs in an earlier commit — fold the fix there, don't tack a loose fix on the end. The branch isn't pushed yet, so rewriting local history is safe. Two patterns by cause:

• The upgrade is fine but code must adapt — make the code/config change, then fold it into the commit that introduced the breakage: git commit --fixup=<offending-commit> followed by git rebase --autosquash --interactive <base>.
• One package in a bulk commit is the culprit — pull just that package out of the bulk so the bulk stays green (re-run the bulk with that package added to --exclude, or drop its version bump from the bulk commit via a fixup), then give it its own commit on top with the code change it needs — exactly like a major.

Either way, keep every commit independently green and bisectable, and never move to the next phase with a red suite — the fix-up happens in the phase that caused it.

Workflow

1. Verify clean baseline — git status clean; build, lint, test green (run e2e if anything looks risky). Fix or stop if the baseline is broken before you start.

1. Dry-run — update-packages --dry-run --quiet (no side flag covers both). Read the output and split each side into:

• Trivial = every patch and minor line.
• Majors = every major line. Collect the package names; each becomes its own commit.
• Toolchain = any (sdk) line (e.g. dotnet-sdk) and any ⚠️ … is NOT installed warning — these gate the backend and are handled first (step 3).
• restricted lines are the permanent exceptions — ignore them.

1. Toolchain prerequisites (sudo) — resolve before any upgrade — if the dry-run reports a dotnet-sdk (or other framework) bump whose target version is not installed locally, the backend update will abort: update-packages --backend exits when the required SDK is missing. You cannot install it yourself — it needs sudo/admin. Stop and ask the user to run the exact install command the dry-run printed (e.g. brew upgrade dotnet-sdk on macOS, winget upgrade Microsoft.DotNet.SDK.<major> on Windows), then wait for them to confirm. Re-run update-packages --dry-run --quiet and check that nothing is still flagged as not-installed before continuing. This keeps the backend first and unblocked — do not start the frontend while a backend toolchain install is pending.

1. Backend bulk (trivial) — apply all backend patch/minor at once, excluding the majors so only safe bumps land:

bash dotnet run --project developer-cli -- update-packages --backend --exclude <comma-separated backend majors> --quiet Then build --backend + lint --backend. When green, commit, e.g. Upgrade backend NuGet packages, dotnet tools, and SDK to latest minor and patch versions.

1. Backend majors, one at a time — for each backend major package P (the only outstanding backend updates after the bulk are the majors, so exclude the other majors to move just P):

bash dotnet run --project developer-cli -- update-packages --backend --exclude <every other backend major> --quiet Research P's changelog, make the required code changes, adopt cheap new features, run build/format/lint/test (+ e2e if it touches runtime), and commit P and its changes together, e.g. Upgrade <Package> to <version> and <what changed>.

1. Backend regression gate — full suite with e2e, before the frontend — with every backend commit in place, run the full backend suite: build --backend, format --backend, lint --backend, test, and e2e. The backend must be fully green here, before any frontend work begins — that way a failure is unambiguously a backend regression and its fix lands in a backend commit. If it fails, fix it up now (see Fixing A Regression); never carry a red backend suite into the frontend phase.

1. Frontend bulk (trivial) — same as step 4 with --frontend. The CLI runs npm install and npm audit fix for you. Then build --frontend + lint --frontend (+ format --frontend since the install may reformat). Commit, e.g. Upgrade frontend npm dependencies to latest minor and patch versions.

1. Frontend majors, one at a time — same as step 5 with --frontend. Formatter/linter majors (oxfmt, oxlint) and i18n/build-tool majors warrant a format + e2e pass. One commit per major.

1. GitHub Actions — the last upgrade — only after backend and frontend are fully done, bump the workflow dependencies in .github/workflows/*.yml (not covered by update-packages):

• Each uses: <action>@vN to its latest major (e.g. actions/checkout, actions/setup-node, actions/setup-dotnet, actions/setup-java, actions/upload-artifact, actions/download-artifact, actions/github-script, azure/login, docker/setup-buildx-action).
• runs-on: runners to the current Ubuntu LTS image (e.g. ubuntu-24.04).
• Pinned tool versions inside with: (node-version, and any others) to match the project's runtime.

Verify nothing else references an old version; commit, e.g. Upgrade GitHub Actions and runner images to latest versions.

1. Final regression — close by running the full set for both sides: build, format, lint, test, e2e. If anything fails, fix it up in the commit that caused it (see Fixing A Regression) rather than tacking a fix on the end. Then summarise to the user: what moved, what was skipped (with reason), what was adopted, what's deferred.

Success

Every non-exception package on its latest version. Trivial bumps in one bulk commit per side; each major and each code/config change in its own clear commit; GitHub Actions current. The CLI is better than when you started — every bug you tripped over is fixed at the source and committed separately. build, format, lint, test, and e2e all green at HEAD.