tests: standardize on embedded tests (migrate all from tests/ to lisp/ sources)

lisp/system-model-explorer.lisp

@@ -67,3 +67,43 @@
     (:chat . "Casual conversation, Q&A, creative writing. Prefer balanced quality, low latency.\nRecommend: Llama 3.3 70B (strong generalist) or Gemma 4 31B (thinking mode).")
     (:plan . "Strategic planning, architecture design, complex multi-step reasoning.\nRecommend: Owl Alpha (free, tool use, 1M ctx) or Hermes 3 405B (strongest free reasoning).")
     (:background . "Heartbeat summaries, delegation responses, tool output filtering. Must be small + fast.\nRecommend: Llama 3.2 3B (131K ctx, fast) or LFM 2.5 1.2B (edge-ready).")))
+
+;; REPL-verified: 2026-05-04
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (ignore-errors (ql:quickload :fiveam :silent t)))
+
+(defpackage :passepartout-system-model-explorer-tests
+  (:use :cl :passepartout)
+  (:export #:model-explorer-suite))
+
+(in-package :passepartout-system-model-explorer-tests)
+
+(fiveam:def-suite model-explorer-suite :description "Tests for the model explorer skill")
+
+(fiveam:in-suite model-explorer-suite)
+
+(fiveam:test model-explorer-recommend-slots
+  "model-explorer-recommend should return models for all standard slots"
+  (dolist (slot '(:code :chat :plan :background))
+    (let ((recs (passepartout::model-explorer-recommend slot)))
+      (fiveam:is (listp recs))
+      (fiveam:is (>= (length recs) 1)))))
+
+(fiveam:test model-explorer-recommend-format
+  "Each recommendation should have :id and :name"
+  (dolist (rec (passepartout::model-explorer-recommend :chat))
+    (fiveam:is (getf rec :id))
+    (fiveam:is (getf rec :name))))
+
+(fiveam:test model-explorer-recommend-unknown-slot
+  "Unknown slot should return fallback"
+  (let ((recs (passepartout::model-explorer-recommend :unknown)))
+    (fiveam:is (listp recs))
+    (fiveam:is (>= (length recs) 1))))
+
+(fiveam:test model-explorer-fetch-openrouter-count
+  "OpenRouter API should return at least 300 models"
+  (let ((models (passepartout::model-explorer-fetch :openrouter)))
+    (if models
+        (fiveam:is (>= (length models) 300))
+        (fiveam:skip "API unreachable"))))