docs(work): decompose platform-retrofit and walking-skeleton epics

platform-retrofit: 8 stories / 18 tasks (spec bundle into docs/product,
single-version release-please before deletions, demo feature removal,
web-next auth shell, optional cores, work-tree archive, library traces,
agent-doc rewrite). walking-skeleton: 11 stories / 28 tasks across
workspaces, discovery, core-runner-protocol, runner app, editor, and
the flagship connect-to-selection e2e; builds on platform-retrofit
(prose dependency note — cross-epic frontmatter unsupported).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

docs/work/epics/platform-retrofit/07-editor-library-traces/_story.md

@@ -0,0 +1,35 @@
+---
+id: 07-editor-library-traces
+epic: platform-retrofit
+title: Library traces for @xyflow/react and zustand
+type: technical-story
+status: todo
+feature: docs
+depends-on: []
+blocks: []
+created: 2026-07-12T10:22:00Z
+---
+
+## Goal
+
+`docs/library-decisions/` contains approved traces (via the `/evaluate-library` skill, ADR-022) for the feature-tier runtime deps the walking-skeleton PRD needs: `@xyflow/react` and `zustand` (v5). Traces only — the packages are not installed by this story.
+
+## Why
+
+Walking-skeleton tasks must not stall on the library-policy pre-commit hook (PRD user story 6). Pre-approving the traces decouples library evaluation from feature implementation.
+
+## Done when
+
+- `docs/library-decisions/` contains an approved trace for `@xyflow/react` and an approved trace for `zustand` (v5), each produced by the `/evaluate-library` protocol.
+- The ADR-022 pre-commit hook passes on each commit.
+- `pnpm typecheck && pnpm lint && pnpm test && pnpm conformance && pnpm fallow:audit && pnpm coverage:diff` pass.
+
+## Out of scope
+
+- Installing either package into any workspace package (the consuming feature installs them in the walking-skeleton PRD).
+- Traces for runner-side deps (execa, vite, react-docgen-typescript) — app-tier `apps/runner` deps are exempt from ADR-022; traces for them are optional hardening, deferred.
+
+## Tasks
+
+- [ ] Run `/evaluate-library` for `@xyflow/react` and commit the approved trace to `docs/library-decisions/` — one commit, all gates pass.
+- [ ] Run `/evaluate-library` for `zustand` (v5) and commit the approved trace to `docs/library-decisions/` — one commit, all gates pass.