test: add runtime recreate-sanity-check script

Runtime peer to the build-time smoke-test.sh: run inside the container
after `docker compose up -d --force-recreate` to confirm the new image is
live (opencode version matches Dockerfile.variant), persisted named volumes
survived, omos skill symlinks resolve, shell defaults re-seeded, and /opt
toolkits intact. smoke-test.sh runs with --entrypoint="" and cannot see the
running container's volumes/symlinks, hence a separate runtime check.

Not run by CI or the entrypoint (it needs the release-time expected version
and a running container). Maintainer tooling, not baked into the image.
Registered in AGENTS.md File roles. Doc/script-only — no image rebuild.

AGENTS.md

@@ -22,6 +22,7 @@ Docker image packaging [opencode](https://opencode.ai) into a production-ready d
 - `rootfs/usr/local/lib/opencode-devbox/setup-lan-access.sh` — host-OS-agnostic LAN reachability helper. Detects VM-backed hosts (macOS OrbStack / Docker Desktop, via `host.docker.internal` resolution) and generates a writable `~/.ssh-local/config` using the host as an SSH jump; no-op on native Linux. Controlled by `DEVBOX_LAN_ACCESS` / `HOST_SSH_USER` / `DEVBOX_HOST_ALIAS` / `DEVBOX_LAN_AUTOJUMP_PRIVATE`. Ships the mechanism only (generic `host` jump alias); user targets stay host-side — named-peer `ProxyJump host` overrides go in a bind-mounted `~/.config/devbox-shell/ssh-lan.conf` (Included before `~/.ssh/config`), never baked into the image. **Scoping invariant:** every `Include` in the generated config MUST be preceded by a bare `Host *` reset — an `Include` is scoped to the enclosing `Host`/`Match` block, so without the reset the included config only applies when targeting `host`/`mac` and named peers fall back to SSH defaults. The top `Host *` block also overrides `UserKnownHostsFile` and `ControlPath` into the writable `~/.ssh-local` sidecar (first-value-wins), because the bind-mounted `~/.ssh` is read-only — otherwise multiplexed hosts (`ControlPath ~/.ssh/cm/...`) fail to create their master socket. Non-fatal. Counted in the base hash, so editing it advances `base-latest`.
 - `rootfs/usr/local/lib/opencode-devbox/generate-config.py` — generates `~/.config/opencode/opencode.jsonc` from env vars. Never overwrites an existing config (checks both `.json` and `.jsonc`). Auto-registers MCP servers for detected tools (mempalace via `mempalace-mcp`, gitea-mcp, context7 remote endpoint).
 - `scripts/smoke-test.sh` — post-build image verification. Asserts binary presence, opencode startup, entrypoint correctness, config generation idempotency, and image size thresholds. Used by both CI workflows.
+- `scripts/recreate-sanity-check.sh` — **runtime** post-recreate verification (counterpart to the build-time `smoke-test.sh`). Run inside the container after `docker compose up -d --force-recreate` to confirm the new image is live (opencode version matches `Dockerfile.variant`'s `OPENCODE_VERSION`), persisted named volumes survived (mempalace palace, opencode.db, bash-history), omos runtime skill symlinks resolve, shell defaults re-seeded, and `/opt` toolkits intact. Not run by CI or the entrypoint — it needs the running container + volumes that smoke-test.sh (which uses `--entrypoint=""`) cannot see.
 - `scripts/generate-dockerhub-md.py` — generates `DOCKER_HUB.md` from a hand-maintained `HUB_TEMPLATE` constant. `--check` fails if the committed file is out of sync (enforced by the `validate` workflow).
 - `DOCKER_HUB.md` — **auto-generated** from `HUB_TEMPLATE` in `scripts/generate-dockerhub-md.py`. Do not edit directly. Pushed to Docker Hub description via CI API call. Must stay under 25 kB. Short description field must be ≤100 bytes.
 - `README.md` — authoritative source documentation for everything in this repo. Independent of `DOCKER_HUB.md`: the Hub doc is hand-maintained in the generator's `HUB_TEMPLATE` and intentionally slim, linking back to the gitea README for depth.