feat: kernel roadmap wave — bits4, policy v4, Pear/Bare compatibility

- protocol/booter: bits4 handshake, proc surfaces, boot policy v4, telemetry v4
- coreutils: nohup + ensure-man-pages; seed-man-pages fixes for extra pages
- kernel-runner: no static node:module (Pear); bare-module createRequire
- docs: handbook, reference, ADR, compatibility matrix, verify scripts

docs/reference/compatibility-matrix.md

@@ -0,0 +1,22 @@
+# Compatibility matrix (Bare OS)
+
+Single place to compare **protocol**, **booter `ctx` API**, **feature-bit document**, and **telemetry** versions. Values below match the stock tree at release time; always read source for ground truth.
+
+| Artifact | Location | Current (stock) |
+| --- | --- | --- |
+| **`bareOsCtxApiVersion`** | [`packages/bare-os-booter/lib/bare-os-ctx-api.js`](../../packages/bare-os-booter/lib/bare-os-ctx-api.js) | `1.13.0` |
+| **`BARE_OS_KERNEL_FEATURE_BITS_DOC`** | [`packages/bare-os-protocol/lib/kernel-feature-bits.js`](../../packages/bare-os-protocol/lib/kernel-feature-bits.js) | `6` |
+| **Capability words** | `bare_os.capabilities` RPC + `/proc/bare_os_features` | `bits`, `bits2`, `bits3`, **`bits4`** |
+| **Lifecycle / telemetry NDJSON** | `BARE_OS_LIFECYCLE_SCHEMA_VERSION` in [`bare-os-lifecycle-schema.js`](../../packages/bare-os-booter/lib/bare-os-lifecycle-schema.js) | `4` |
+| **Protocol package** | [`bare-os-protocol` `package.json`](../../packages/bare-os-protocol/package.json) | see workspace version |
+
+## Peer assumptions
+
+- **Seeder** must answer **`bare_os.capabilities`** with **`bits4`** when using a current **`bare-os-protocol`** build; older seeders omit **`bits4`** (zeros) — use **`BARE_OS_SEED_CAP_STRICT`** only when peers are upgraded.
+- **Offline LKG** booters skip the swarm peer wait when **`BARE_OS_OFFLINE_LKG_BOOT=1`** and **`BARE_OS_LKG_SYSTEM_KEY_HEX`** is set; the system drive must already contain **`/boot/init.js`** in Corestore.
+
+## See also
+
+- [`kernel-extensions.md`](./kernel-extensions.md)
+- [`kernel-capabilities-index.md`](./kernel-capabilities-index.md)
+- [Handbook ch.11 — Roadmap](../../handbook/11-kernel-roadmap-and-research.md)