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| 1 | +"""Provider-local selectors: policy only, never an inventory or inference gate.""" |
| 2 | + |
| 3 | +from __future__ import annotations |
| 4 | + |
| 5 | +import re |
| 6 | +from collections.abc import Mapping |
| 7 | +from dataclasses import dataclass |
| 8 | +from fnmatch import fnmatchcase |
| 9 | + |
| 10 | +# Only recognize unambiguous version syntax. Everything else remains visible. |
| 11 | +# Keep the whole non-version name: astra/luna/sol/terra, opus/sonnet/haiku, |
| 12 | +# pro/flash/flash-lite, mini/codex, preview and picker routes are NOT equivalent. |
| 13 | +_VERSION = re.compile( |
| 14 | + r"^(gpt|claude(?:-[a-z]+)?|gemini|grok|mai-[a-z]+)-" |
| 15 | + r"(\d+(?:[.-]\d+)*)(?=-|$)(.*)$" |
| 16 | +) |
| 17 | +_O_VERSION = re.compile(r"^(o)(\d+)(?=-|$)(.*)$") |
| 18 | +_DATE = re.compile(r"-(\d{4}-\d{2}-\d{2}|\d{8})$") |
| 19 | + |
| 20 | + |
| 21 | +def _undated(model_id: str) -> tuple[str, str]: |
| 22 | + match = _DATE.search(model_id) |
| 23 | + return (model_id[: match.start()], match[1].replace("-", "")) if match else (model_id, "") |
| 24 | + |
| 25 | + |
| 26 | +def _family_version(model_id: str) -> tuple[str, tuple[int, ...], str] | None: |
| 27 | + base, date = _undated(model_id.casefold()) |
| 28 | + match = _VERSION.fullmatch(base) or _O_VERSION.fullmatch(base) |
| 29 | + if match is None: |
| 30 | + return None |
| 31 | + prefix, version, suffix = match.groups() |
| 32 | + # Both claude-3.5-sonnet and claude-sonnet-4.5 identify the Sonnet family. |
| 33 | + # Preserve all suffixes, including unknown future tiers, rather than guessing. |
| 34 | + family = prefix + suffix |
| 35 | + numbers = tuple(int(part) for part in re.split(r"[.-]", version)) |
| 36 | + return family, numbers, date |
| 37 | + |
| 38 | + |
| 39 | +@dataclass(frozen=True) |
| 40 | +class ModelFilters: |
| 41 | + """Immutable copy of common selectors plus explicit recommendation policy.""" |
| 42 | + |
| 43 | + include: tuple[str, ...] = ("*",) |
| 44 | + exclude: tuple[str, ...] = () |
| 45 | + hide_dated: bool = False |
| 46 | + latest_per_family: bool = False |
| 47 | + |
| 48 | + @classmethod |
| 49 | + def parse(cls, value: Mapping[str, object]) -> ModelFilters: |
| 50 | + if not isinstance(value, Mapping): |
| 51 | + raise TypeError("model filters must be a mapping") |
| 52 | + if set(value) - {"include", "exclude", "hide_dated", "latest_per_family"}: |
| 53 | + raise ValueError("unknown model filter key") |
| 54 | + |
| 55 | + def patterns(key: str, default: tuple[str, ...]) -> tuple[str, ...]: |
| 56 | + raw = value.get(key, default) |
| 57 | + if not isinstance(raw, (list, tuple)) or any( |
| 58 | + not isinstance(pattern, str) or not pattern.strip() for pattern in raw |
| 59 | + ): |
| 60 | + raise ValueError(f"model filters {key} must be a list of nonblank strings") |
| 61 | + return tuple(raw) |
| 62 | + |
| 63 | + def flag(key: str) -> bool: |
| 64 | + raw = value.get(key, False) |
| 65 | + if not isinstance(raw, bool): |
| 66 | + raise TypeError(f"model filters {key} must be a boolean") |
| 67 | + return raw |
| 68 | + |
| 69 | + return cls( |
| 70 | + patterns("include", ("*",)), |
| 71 | + patterns("exclude", ()), |
| 72 | + flag("hide_dated"), |
| 73 | + flag("latest_per_family"), |
| 74 | + ) |
| 75 | + |
| 76 | + def select(self, ids: list[str]) -> list[str]: |
| 77 | + selected = { |
| 78 | + model_id |
| 79 | + for model_id in ids |
| 80 | + if any(fnmatchcase(model_id.casefold(), pattern.casefold()) for pattern in self.include) |
| 81 | + and not any( |
| 82 | + fnmatchcase(model_id.casefold(), pattern.casefold()) for pattern in self.exclude |
| 83 | + ) |
| 84 | + } |
| 85 | + if self.hide_dated: |
| 86 | + folded = {model_id.casefold() for model_id in selected} |
| 87 | + selected = { |
| 88 | + model_id |
| 89 | + for model_id in selected |
| 90 | + if not ((parts := _undated(model_id.casefold()))[1] and parts[0] in folded) |
| 91 | + } |
| 92 | + if self.latest_per_family: |
| 93 | + # Version first, alias before its SAME-version snapshot, newest date |
| 94 | + # for snapshot-only ties. No cross-family quality/cost ranking. |
| 95 | + best: dict[str, tuple[tuple[int, ...], bool, str]] = {} |
| 96 | + parsed = {model_id: _family_version(model_id) for model_id in selected} |
| 97 | + for parts in parsed.values(): |
| 98 | + if parts is not None: |
| 99 | + family, version, date = parts |
| 100 | + rank = (version, not date, date) |
| 101 | + best[family] = max(best.get(family, rank), rank) |
| 102 | + selected = { |
| 103 | + model_id |
| 104 | + for model_id, parts in parsed.items() |
| 105 | + if parts is None or (parts[1], not parts[2], parts[2]) == best[parts[0]] |
| 106 | + } |
| 107 | + return sorted(selected) |
| 108 | + |
| 109 | + def as_dict(self) -> dict[str, object]: |
| 110 | + return { |
| 111 | + "include": list(self.include), |
| 112 | + "exclude": list(self.exclude), |
| 113 | + "hide_dated": self.hide_dated, |
| 114 | + "latest_per_family": self.latest_per_family, |
| 115 | + } |
| 116 | + |
| 117 | + |
| 118 | +def selector_schema() -> dict[str, object]: |
| 119 | + """Fresh metadata, not references to live policy.""" |
| 120 | + return { |
| 121 | + "type": "object", |
| 122 | + "additionalProperties": False, |
| 123 | + "properties": { |
| 124 | + "include": { |
| 125 | + "type": "array", |
| 126 | + "items": {"type": "string", "minLength": 1}, |
| 127 | + "default": ["*"], |
| 128 | + "description": "Case-insensitive OS-independent globs; [] includes none.", |
| 129 | + }, |
| 130 | + "exclude": { |
| 131 | + "type": "array", |
| 132 | + "items": {"type": "string", "minLength": 1}, |
| 133 | + "default": [], |
| 134 | + "description": "Case-insensitive OS-independent globs; exclusion wins.", |
| 135 | + }, |
| 136 | + "hide_dated": { |
| 137 | + "type": "boolean", |
| 138 | + "default": False, |
| 139 | + "description": "Hide YYYY-MM-DD/YYYYMMDD snapshots if their alias is selected.", |
| 140 | + }, |
| 141 | + "latest_per_family": { |
| 142 | + "type": "boolean", |
| 143 | + "default": False, |
| 144 | + "description": ( |
| 145 | + "Latest numeric version per recognized vendor/family/tier/route; alias before " |
| 146 | + "matching snapshot, newest snapshot otherwise. Unknown names remain visible." |
| 147 | + ), |
| 148 | + }, |
| 149 | + }, |
| 150 | + } |
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