feat: store per-model metadata in models.ini

Cloud models have no presets.ini entry, so context size, vision and
prices are recorded per model in a file the app writes. A cancelled
dialog leaves a marker so a model tried once never asks again, which is
distinct from an absent section meaning never asked.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 98 insertions, 0 deletions

diff --git a/test_llamachat.py b/test_llamachat.py
index 29f305f..8b53d55 100755
--- a/test_llamachat.py
+++ b/test_llamachat.py
@@ -1380,6 +1380,103 @@ def test_config_providers():
     print("ok  config provider table")
 
 
+def test_models_store():
+    """models.ini round-trips per-model metadata and the cancel record."""
+    from llamachat import models
+
+    with tempfile.TemporaryDirectory() as tmp:
+        path = Path(tmp) / "models.ini"
+        store = models.ModelStore(path)
+
+        # Nothing recorded yet.
+        assert store.get("together:Qwen/Qwen2.5") is None
+        assert store.was_offered("together:Qwen/Qwen2.5") is False
+
+        store.save(
+            "together:Qwen/Qwen2.5",
+            models.ModelInfo(
+                ctx_size=32768, vision=False, price_in=1.2, price_out=1.2
+            ),
+        )
+        # A cancelled dialog records that it was offered, nothing more.
+        store.mark_skipped("together:Llama-Vision-Free")
+
+        # Reread from disk, not from memory: this is the round trip.
+        fresh = models.ModelStore(path)
+        info = fresh.get("together:Qwen/Qwen2.5")
+        assert info.ctx_size == 32768
+        assert info.vision is False
+        assert info.price_in == 1.2
+        assert info.price_out == 1.2
+        assert fresh.was_offered("together:Qwen/Qwen2.5") is True
+
+        assert fresh.get("together:Llama-Vision-Free") is None
+        assert fresh.was_offered("together:Llama-Vision-Free") is True
+
+        # Partial entries are legal: prices may be left blank.
+        fresh.save("together:cheap", models.ModelInfo(ctx_size=8192))
+        again = models.ModelStore(path)
+        partial = again.get("together:cheap")
+        assert partial.ctx_size == 8192
+        assert partial.price_in is None
+        assert partial.vision is None
+
+        # A model id with a colon must survive being an ini section name.
+        again.save("together:org/name:v2", models.ModelInfo(ctx_size=4096))
+        assert models.ModelStore(path).get("together:org/name:v2").ctx_size == 4096
+
+        # Real ids carry slashes, dots and mixed case. Section names are
+        # case sensitive, unlike keys, so the id must come back verbatim.
+        for real in (
+            "together:Qwen/Qwen2.5-72B-Instruct-Turbo",
+            "together:deepseek-ai/DeepSeek-V3",
+            "together:meta-llama/Llama-3.3-70B",
+        ):
+            again.save(real, models.ModelInfo(ctx_size=128000, vision=True))
+            back = models.ModelStore(path).get(real)
+            assert back.ctx_size == 128000, real
+            assert back.vision is True, real
+
+        # vision=False must not be written as "False" and read back as None:
+        # bool is an int subclass, so the write order matters.
+        again.save("together:novision", models.ModelInfo(vision=False))
+        assert models.ModelStore(path).get("together:novision").vision is False
+
+        # Cancelling a dialog over a model we already know must not erase it.
+        again.mark_skipped("together:Qwen/Qwen2.5")
+        assert models.ModelStore(path).get("together:Qwen/Qwen2.5").ctx_size == 32768
+
+        # An all-blank save is still an answer: asked, learned nothing. It
+        # must not read back as never offered, or the dialog reopens forever.
+        # configparser does round-trip a keyless section, so the marker is
+        # belt and braces against an empty section being dropped by hand.
+        again.save("together:blank", models.ModelInfo())
+        reread = models.ModelStore(path)
+        assert reread.get("together:blank") is None
+        assert reread.was_offered("together:blank") is True
+
+        # A hand-edited file must degrade, not raise: "32k" is not an int.
+        # The [DEFAULT] value is deliberately a *valid* int, so this catches
+        # the leak itself rather than an unparseable value hiding it.
+        path.write_text(
+            "[DEFAULT]\nctx_size = 999\n\n"
+            "[together:junk]\nctx_size = 32k\nprice_in = free\n\n"
+            "[together:empty]\n",
+            encoding="utf-8",
+        )
+        edited = models.ModelStore(path)
+        assert edited.get("together:junk") is None
+        assert edited.was_offered("together:junk") is True
+        # Would be ctx_size 999, inherited from [DEFAULT], if the store used
+        # configparser's real default section.
+        assert edited.get("together:empty") is None
+
+        # A file that is not ini at all reads as empty rather than raising.
+        path.write_text("this is not an ini file\n", encoding="utf-8")
+        assert models.ModelStore(path).was_offered("together:junk") is False
+    print("ok  models.ini storage")
+
+
 class _FakeResponse:
     """Enough of an http.client response for urlopen's context manager."""
 
@@ -2123,6 +2220,7 @@ if __name__ == "__main__":
     test_model_ids_and_filtering()
     test_key_resolution()
     test_config_providers()
+    test_models_store()
     test_search_tool_schema()
     test_search_results_sanitising()
     test_tool_call_accumulation()