Distillation

🔴 (11:39) User stated package managers always need network access to fetch and install packages; offline upgrade remains supported only for curl-installed binaries.
🔴 (11:39) User stated nightly builds are GitHub-only, so nightly version lookup must always use the curl (GitHub) path regardless of the current installation method.
🟡 (11:39) Diff in packages/cli/src/commands/cli/upgrade.ts adds imports for isNightlyVersion and UpgradeSource from ../../lib/binary.js.
🟡 (11:39) validateMethod() in packages/cli/src/commands/cli/upgrade.ts no longer accepts channel: ReleaseChannel; it derives pinnedVersion by excluding CHANNEL_VERSIONS and stripping VERSION_PREFIX_REGEX, then rejects Homebrew only when the requested pin is not a nightly version.
🟡 (11:39) Target resolution in packages/cli/src/commands/cli/upgrade.ts now returns { kind: "target", target: resolvedTarget, source } instead of { kind: "target", target }; the former direct versionExists(lookupMethod, target) block was removed.
🟡 (11:39) migrateToStandaloneForNightly() in packages/cli/src/commands/cli/upgrade.ts now accepts source?: UpgradeSource and channel: ReleaseChannel, and destructures both for source-aware nightly migration.
🟡 (11:39) The nightly standalone migration contract remains ordered as: 1. download the nightly binary to a temporary path; 2. install it using determineInstallDir(); 3. run setup on the new binary to update completions, PATH, and metadata; 4. return warnings that the old package-manager installation may remain in PATH.

Distillation

Observations