feat: redundant WSL brain serve + keepalive (fail-safe)

- serve-brain-wsl.sh: serves WSL central brain over HTTP MCP :8090 (independent of Windows brain)
- keepalive-brain-wsl.sh: restarts serve if :8090 drops
- cron agentic-os-brain-keepalive-wsl every 5 min mirrors Windows keepalive
- README documents the two independent :8090 endpoints (WSL + Windows)

brain/graph/README.md

@@ -18,6 +18,8 @@ bash brain/graph/build-central.sh            # rebuild WSL central brain (code g
 bash brain/graph/link-project.sh <name> <graph.json>   # register a project's graph into the brain
 bash brain/graph/sync-to-windows.sh          # rebuild + push merged graph to Windows central brain
 bash brain/graph/serve-brain.sh             # serve WSL central brain over HTTP MCP (:8090)
+bash brain/graph/serve-brain-wsl.sh         # redundant WSL serve (:8090, independent of Windows brain)
+bash brain/graph/keepalive-brain-wsl.sh     # restart WSL serve if :8090 drops (fail-safe)
 ```
 Set `CENTRAL_BRAIN_PORT` to override the serve port (default 8090).
 
@@ -33,3 +35,5 @@ Set `CENTRAL_BRAIN_PORT` to override the serve port (default 8090).
 - `graphify`'s MCP HTTP serve requires the extra: `pip install "graphifyy[mcp]"` (done in the venv).
 - The write path for memory is still `brain/*.md` + `audit` + `data/`; graphify reads those, never writes them.
 - Rebuild is scheduled hourly by the `agentic-os-brain-rebuild` cron.
+- WSL serve is kept alive every 5 min by the `agentic-os-brain-keepalive-wsl` cron (fail-safe; mirrors Windows `keepalive-brain.bat`).
+- Two independent brain endpoints exist on :8090 — WSL (this tree) and Windows (`C:\Users\Austin\Brains\central\`). Either can answer if the other is down.

brain/graph/keepalive-brain-wsl.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Redundant keepalive for the WSL-side central brain MCP serve (:8090).
+# Mirrors keepalive-brain.bat on Windows. If the serve is down, start it.
+# Designed as a fail-safe: the Windows brain is primary for Windows-side
+# queries; this keeps the WSL-side brain answerable even if Windows is down.
+set -u
+PORT="${CENTRAL_BRAIN_PORT:-8090}"
+LAUNCH="/home/austin/agentic-os/brain/graph/serve-brain-wsl.sh"
+LOG="/home/austin/agentic-os/brain/graph/wsl-keepalive.log"
+
+# is something listening on the port?
+if ss -ltn 2>/dev/null | grep -q ":$PORT "; then
+  exit 0
+fi
+
+echo "$(date '+%F %T') brain serve down on :$PORT -- starting" >> "$LOG"
+# launch detached so this script can exit (cron-friendly)
+setsid bash "$LAUNCH" >> "$LOG" 2>&1 < /dev/null &

brain/graph/serve-brain-wsl.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+# Serve the WSL-side central brain over HTTP MCP.
+# Independent of the Windows brain (separate process, same port 8090 on the
+# WSL loopback). Provides a redundant/fail-safe brain endpoint: if the Windows
+# brain is unavailable, agents on the WSL side can still query here.
+set -u
+DIR="/home/austin/agentic-os"
+VENV="$DIR/venv"
+GF="$VENV/bin/python"
+GRAPH="$DIR/brain/graph/central-graph.json"
+PORT="${CENTRAL_BRAIN_PORT:-8090}"
+
+cd "$DIR" || exit 1
+if [ ! -f "$GRAPH" ]; then
+  echo "central brain missing ($GRAPH). Run: bash brain/graph/build-central.sh" >&2
+  exit 1
+fi
+echo "Serving WSL central brain on http://127.0.0.1:$PORT/mcp"
+exec "$GF" -m graphify.serve "$GRAPH" --transport http --host 127.0.0.1 --port "$PORT"