docs: add shared agent knowledgebase

shared/knowledge/runbooks/start-gerhard.md

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+# Runbook: start Gerhard on Omega13
+
+## Preconditions
+
+Expected side-by-side layout:
+
+```text
+~/Projects/Agent0
+~/Projects/gutasktool
+```
+
+Local `.env` exists in `Agent0` and contains non-committed credentials:
+
+- `API_URL`
+- `CONTENT_API_KEY`
+- `AGENT_ID`
+- `AGENT_NAME`
+- `AGENT_PASSWORD`
+- model provider keys as needed
+
+SSH config/keys on the host can push to Gitea if Gerhard is expected to push repository changes.
+
+## Pull latest
+
+```bash
+cd ~/Projects/Agent0
+git pull --ff-only
+cd ../gutasktool
+git pull --ff-only
+```
+
+## Start Gerhard first
+
+```bash
+cd ~/Projects/Agent0
+docker compose up -d gerhard gerhard-dashboard
+```
+
+## Validate
+
+```bash
+docker compose ps gerhard gerhard-dashboard
+docker logs gerhard --tail=100
+docker logs gerhard-dashboard --tail=100
+```
+
+Check gutask wrapper:
+
+```bash
+docker compose exec gerhard /opt/data/bin/gutask --help
+docker compose exec gerhard /opt/data/bin/gutask orient --agent "$AGENT_ID"
+```
+
+Check shared knowledge mount:
+
+```bash
+docker compose exec gerhard test -f /knowledge/README.md
+```
+
+## Dashboard
+
+Gerhard dashboard should be reachable from Omega13 at:
+
+```text
+http://localhost:50007
+```
+
+## Then tunnel and rest
+
+Only after Gerhard is stable:
+
+```bash
+docker compose up -d glitch-tunnel
+docker compose up -d
+```