feat(ms-ai-architect): C2.2 valgfritt fritekst-felt free-context.md i onboarding (TDD) [skip-docs]

Spor C / C2.2 (#3, akseptanse K3): fanger et fritt prosa-felt i onboarding og
overflater det (kappet) ambient i hver sesjon.

- lib/user-data.mjs: FREE_CONTEXT_FILE (utenfor ORG_FILES — valgfri, teller ikke
  mot fullføring), collapseProse() surfacer fri kontekst som ÉTT felt uansett
  markdown-struktur (ingen stille drop), capValue() ekstrahert (DRY).
- session-start-context.mjs: leser free-context.md valgfritt (ingen count++).
- onboarding-agent.md: ny Phase 6 (valgfri); onboard.md: prosess/Task/status.
- 11 agenter: uniform 6. bullet (grep 11/11).
- Tester FØR kode: user-data 25/25 (+9), test-hooks 11/11 (+1 K3-ambient).

Gates: validate 239/0/0 · kb-update 200 · kb-eval 100 · kb-integrity 192/192
(220 baseline-warns) · discovery 13/13 · gitleaks 3 pre-eksisterende.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/test-hooks.sh

@@ -58,6 +58,20 @@ Statlig
 Testetaten
 ORGEOF
 
+# C2.2: optional free-prose file — read for the ambient summary, NOT counted
+# toward onboarding completeness. Proves K3 (free-text visible in interaction).
+cat > "$TMPHOME/.claude/ms-ai-architect/org/free-context.md" <<'FREEEOF'
+---
+category: free-context
+completed: true
+---
+
+# Fri kontekst
+
+## Fri kontekst
+Vi migrerer fra on-prem til Azure i 2026.
+FREEEOF
+
 OUTPUT=$(CLAUDE_PLUGIN_ROOT="$PLUGIN_ROOT" HOME="$TMPHOME" node "$SCRIPTS_DIR/session-start-context.mjs" 2>/dev/null)
 
 if echo "$OUTPUT" | grep -q "Virksomhetskontekst (auto-injisert"; then
@@ -72,6 +86,12 @@ else
   fail "Ambient block missing org fact"
 fi
 
+if echo "$OUTPUT" | grep -q "Fri kontekst: Vi migrerer fra on-prem til Azure"; then
+  pass "Ambient block surfaces optional free-context (K3)"
+else
+  fail "Ambient block missing free-context content (K3)"
+fi
+
 # Empty home (no user org, no plugin org) => onboarding nudge, NO ambient block.
 TMPHOME2=$(mktemp -d)
 OUTPUT=$(CLAUDE_PLUGIN_ROOT="$PLUGIN_ROOT" HOME="$TMPHOME2" node "$SCRIPTS_DIR/session-start-context.mjs" 2>/dev/null)