feat(tooling): add atlas-update-field and atlas-commit-and-sync scripts

atlas-update-field: update system-level fields across star_systems,
system_gates, and system_history tables with field whitelist.
atlas-commit-and-sync: full per-system pipeline (verify → wipe → commit
→ sync-wiki → git commit). Updated atlas SKILL.md with new commands.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tooling/atlas-commit-and-sync

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+# Commit a single system proposal to DB, sync wiki, and create a git commit.
+# Handles wipe-if-exists automatically.
+#
+# Usage: atlas-commit-and-sync "GJ 105A" [corridor_tag]
+#   corridor_tag defaults to "east_reach"
+set -euo pipefail
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+ATLAS="$SCRIPT_DIR/atlas"
+
+if [[ $# -lt 1 ]]; then
+  echo "Usage: atlas-commit-and-sync SYSTEM_ID [corridor_tag]" >&2
+  exit 1
+fi
+
+SYS_ID="$1"
+CORRIDOR="${2:-east_reach}"
+SLUG="${SYS_ID// /}"
+FILE="docs/atlas/proposals/${SLUG}.json"
+WIKI_SLUG="${SYS_ID// /-}"
+WIKI="wiki/star-systems/${WIKI_SLUG}/index.md"
+
+if [[ ! -f "$FILE" ]]; then
+  echo "ERROR: proposal not found: $FILE" >&2
+  exit 1
+fi
+
+# 1. Verify
+echo "--- Verifying $FILE"
+"$SCRIPT_DIR/atlas-verify" "$FILE"
+
+# 2. Get system info for commit message
+PROPER=$(python3 -c "import json; d=json.load(open('$FILE')); print(d.get('proper_name') or d['system_id'])")
+
+# 3. Wipe existing data if present
+BODY_COUNT=$("$ATLAS" show-system "$SYS_ID" 2>/dev/null \
+  | python3 -c "import json,sys; d=json.load(sys.stdin); print(len(d.get('bodies',[])))" 2>/dev/null \
+  || echo "0")
+if [[ "$BODY_COUNT" -gt 0 ]]; then
+  echo "--- Wiping existing data for $SYS_ID"
+  "$ATLAS" wipe-system "$SYS_ID"
+fi
+
+# 4. Commit to DB
+echo "--- Committing $SYS_ID to systems.db"
+"$ATLAS" commit-system "$FILE"
+
+# 5. Sync wiki
+echo "--- Syncing wiki"
+"$ATLAS" sync-wiki "$SYS_ID"
+
+# 6. Git add + commit
+echo "--- Git commit"
+git add "$FILE"
+[[ -f "$WIKI" ]] && git add "$WIKI"
+git commit -m "data(atlas): author ${SYS_ID} (${PROPER}) — ${CORRIDOR}
+
+Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>"
+
+echo "--- Done: $SYS_ID ($PROPER)"