feat(ms-ai-architect): add plugin to open marketplace (v1.5.0 baseline)

Initial addition of ms-ai-architect plugin to the open-source marketplace.
Private content excluded: orchestrator/ (Linear tooling), docs/utredning/
(client investigation), generated test reports and PDF export script.
skill-gen tooling moved from orchestrator/ to scripts/skill-gen/.

Security scan: WARNING (risk 20/100) — no secrets, no injection found.
False positive fixed: added gitleaks:allow to Python variable reference
in output-validation-grounding-verification.md line 109.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/ms-ai-architect/tests/test-cost-output.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+# test-cost-output.sh — Validate cost-estimation-agent output structure
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+source "$SCRIPT_DIR/lib/e2e-helpers.sh"
+
+FIXTURE="$SCRIPT_DIR/fixtures/cost-estimation/fixture.md"
+
+if [ ! -f "$FIXTURE" ]; then
+  echo "ERROR: Fixture not found: $FIXTURE"
+  echo "Run: bash tests/capture-fixture.sh to generate fixtures"
+  exit 1
+fi
+
+init_suite "Cost Estimation Agent"
+
+# Structure checks
+assert_has_section "$FIXTURE" "Kostnad" "Has cost section header"
+assert_has_section "$FIXTURE" "TCO" "Has TCO section"
+assert_has_section "$FIXTURE" "Konfidens" "Has confidence grading section"
+assert_has_section "$FIXTURE" "Gevinst" "Has benefit realization section"
+
+# Content quality
+assert_min_lines "$FIXTURE" 30 "Minimum 30 lines"
+assert_min_tables "$FIXTURE" 2 "Minimum 2 tables (TCO, confidence)"
+assert_has_nok_amounts "$FIXTURE" 3 "At least 3 NOK amounts"
+
+# Encoding
+assert_encoding_ok "$FIXTURE" "UTF-8 encoding valid"
+assert_no_ascii_approximation "$FIXTURE" "No ASCII approximation of Norwegian chars"
+
+# Domain-specific
+assert_matches_pattern "$FIXTURE" "(Alt|Alternativ)\s*[0-9]" "References numbered alternatives"
+assert_matches_pattern "$FIXTURE" "(Etablering|etablering)" "Has establishment cost section"
+assert_matches_pattern "$FIXTURE" "(drift|Drift)" "Has operational cost section"
+assert_matches_pattern "$FIXTURE" "(MCP-verifisert|Verifisert|verifisert)" "Has verification markers"
+
+print_summary