init: seed framework reference content from agent-runtimes main repo

harnesses/contexts/gitea-ssh-homelab/v1/init.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -euo pipefail
+
+# Extract SSH private key from decrypted env file for the homelab identity.
+# The meta-init script generates ~/.ssh/config with
+# IdentityFile /home/agent/.ssh/gitea-oreillyit-nz-homelab
+# matching the ssh_hosts alias in harness.yaml.
+
+SSH_KEY_FILE="/home/agent/.ssh/gitea-oreillyit-nz-homelab"
+
+for env_file in /opt/harness/secrets/gitea-ssh-homelab/*.decrypted.env /opt/harness/secrets/gitea-ssh-homelab/*.env; do
+    [ -f "$env_file" ] || continue
+    while IFS='=' read -r key value; do
+        [[ "$key" =~ ^[[:space:]]*# ]] && continue
+        [[ -z "$key" ]] && continue
+        if [ "$key" = "GITEA_SSH_KEY" ]; then
+            mkdir -p /home/agent/.ssh
+            echo "$value" | base64 -d > "$SSH_KEY_FILE"
+            chmod 600 "$SSH_KEY_FILE"
+            chown agent:agent "$SSH_KEY_FILE"
+            echo "SSH key written to $SSH_KEY_FILE"
+            break 2
+        fi
+    done < "$env_file"
+done
+
+if [ ! -f "$SSH_KEY_FILE" ]; then
+    echo "WARNING: GITEA_SSH_KEY not found in any env file under /opt/harness/secrets/gitea-ssh-homelab/"
+fi