updatelisted

# update Carried near-verbatim from donor `skills/update/` (Task 7.3) — the migration state machine's snapshot/restore/version-compare substrate. Renamed identifiers only: `SF_WIKI_ROOT` → `REN_WIKI_ROOT`, `SF_SNAPSHOT_MODE` → `REN_SNAPSHOT_MODE`, `~/.startup-framework/` → `~/.renos/`. ## Scripts (carried, unchanged behavior) - `scripts/snapshot.sh <from-version>` — copies the wiki to `${CLAUDE_PLUGIN_DATA}/wiki-snapshots/v\<from\>-pre-update-\<ISO8601\>/`, prunes beyond `CLAUDE_PLUGIN_OPTION_SNAPSHOTRETAIN` (default 3), logs the snapshot to `wiki/log.md`. - `scripts/restore.sh {--list|--whole <snap>|--page <snap> <rel>}` — lists snapshots, restores the whole wiki (stashing the pre-restore state first), or restores a single page. - `scripts/prune-snapshots.sh [<N>] [--dry-run]` — retention enforcement for both normal snapshots and `STASH-broken-*` dirs (created by `restore.sh --whole`). - `scripts/version-compare.sh <A> <B>` / `--bump <A> <B>` — strict semver comparison + bump classification (patch/minor/major/downgrade/equal/prerelease). No CC-marketplace dependency; the framework owns semver semantics since the marketplace treats `version` as an opaque string. ## When to use this skill - Friend invokes `/ren:update` to check for and apply a framework version bump - Friend invokes `/ren:update --dry-run` to preview the migration plan with zero writes - Friend invokes `/ren:update --restore-snapshot` to interactively restore from a prior snapshot ## What this skill does