feat(s36): costsim CLI + no-network + no-hardcoded-price guards

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0145ZKPLMVeqM47z2jxxokym

src/portfolio_optimiser/costsim.py

@@ -19,6 +19,7 @@ kr is formatted only at the display edge.
 from __future__ import annotations
 
 import json
+import sys
 from pathlib import Path
 from typing import Any
 
@@ -243,3 +244,66 @@ def dump_estimate_table(table: dict[str, Any]) -> str:
     """Byte-deterministic JSON serialization of an estimate table (mirrors ``outbox._dump``:
     ``sort_keys``, ``indent=2``, trailing LF)."""
     return json.dumps(table, sort_keys=True, indent=2) + "\n"
+
+
+def _format_table_text(table: dict[str, Any]) -> str:
+    """Human-readable estimate table for the CLI (honest labels + per-model guidance + kost-mot-verdi
+    + adoption-path footer)."""
+    lines = [
+        f"Kostnadsestimat (øvre grense, ikke prediksjon) — profil: {table['profile']}, "
+        f"prosjekter: {table['n_projects']}, max_tokens/run: {table['max_tokens']}",
+        f"Prisdata: {table['pricing_source']} ({table['pricing_date']})",
+        "",
+        f"{'rolle':<10} {'modell':<30} {'effort':<10} {'estimat':>16}  type",
+    ]
+    for row in table["rows"]:
+        est = row["estimat_kr"] if row["estimat_kr"] is not None else "—"
+        lines.append(
+            f"{row['role']:<10} {row['model']:<30} {row['effort']:<10} {est:>16}  "
+            f"{row['estimat_type']}"
+        )
+        guidance = row["kvalitets_veiledning"]
+        if guidance is not None:
+            lines.append(f"    veiledning (kilde: {guidance['source']}): {guidance['note']}")
+    kmv = table["kost_mot_verdi"]
+    lines += [
+        "",
+        f"kost-mot-verdi: kjøringen kostet ~{kmv['kjoring_kostet_kr']} (modellert øvre grense); "
+        "kvalitetssikret modellert besparelse fylles av S5.4 verdirapport",
+        "",
+        "Adopsjonssti: start liten (én dimensjon, ett prosjekt, lavt tak) → eskaler med tilliten.",
+    ]
+    return "\n".join(lines)
+
+
+def main(argv: list[str] | None = None) -> int:
+    """CLI entry: ``python -m portfolio_optimiser.costsim`` — offline what-if estimate table over the
+    model-map (models × effort levels). No network; fail-fast (rc 1) on missing/invalid config."""
+    import argparse
+
+    parser = argparse.ArgumentParser(
+        prog="portfolio_optimiser.costsim",
+        description="Offline kostnadssimulering før kjøring (S3.6) — estimerer kjøringskost per "
+        "modell × effortnivå fra skjema-validert prisdata. Ingen modellkall, ingen nettverk.",
+    )
+    parser.add_argument("--profile", default="local", help="model-map profil (local/azure)")
+    parser.add_argument("--projects", type=int, default=4, help="antall prosjekter i porteføljen")
+    parser.add_argument(
+        "--efforts", default="low,standard,high", help="komma-liste av effortnivåer"
+    )
+    parser.add_argument("--pricing", default=None, help="sti til prisdata-konfig (default: pakket)")
+    args = parser.parse_args(argv)
+
+    efforts = [e.strip() for e in args.efforts.split(",") if e.strip()]
+    try:
+        pricing = load_pricing(args.pricing)
+        table = build_estimate_table(args.profile, efforts, pricing, n_projects=args.projects)
+    except (FileNotFoundError, ValueError) as exc:
+        print(f"costsim: {exc}", file=sys.stderr)
+        return 1
+    print(_format_table_text(table))
+    return 0
+
+
+if __name__ == "__main__":  # pragma: no cover - console entry
+    raise SystemExit(main())