context-restorelisted

> Inherits references/kernel.md (the provenance contract). Reads references/wiki-spec.md for schema. ## What this is The other half of qcobrain's checkpoint pair. It rehydrates a `/context-save` snapshot and reconciles it with reality — because the brain may have changed since the snapshot was taken. You get back the thread state *and* a diff against current truth. ## Execution ### 1 — Pick the snapshot Default: the newest `runtime/checkpoints/*.snapshot.md` (sort by filename timestamp). If a name or timestamp is given, use that one. If none exist, say so and offer to start fresh from `context/state.md` + `digests/`. ### 2 — Reload Read the snapshot's open threads, pending decisions, and next action. ### 3 — Re-orient against current truth (the important part) Re-read the current `context/state.md`, `digests/`, and the snapshot's referenced `[[notes]]`. Compute the deltas: - Threads the snapshot lists as open that are now resolved (closed in `state.md` / `decisions/log.md`) → mark done. - Decisions that were pending and have since been logged in `decisions/log.md` → resolved. - Notes referenced by the snapshot that are now `status: superseded` → follow `superseded_by` to current truth before reusing them. - Anything in `state.md` / `digests/` newer than the snapshot → surface as "new since checkpoint". ### 4 — Hand back Print: the goal, the still-open threads (post-reconciliation), the still-pending decisions, the recommended next action, and a short "changed since