-- B07保存具体提案、意向和外部owner原回执；不复制目标生效状态。
CREATE TABLE public.muse_improvement (
    improvement_id uuid PRIMARY KEY,
    author_id text NOT NULL,
    current_revision integer NOT NULL CHECK(current_revision > 0)
);
CREATE TABLE public.muse_improvement_version (
    improvement_id uuid NOT NULL REFERENCES public.muse_improvement,
    revision integer NOT NULL CHECK(revision > 0),
    payload jsonb NOT NULL,
    content_hash text NOT NULL CHECK(content_hash ~ '^[0-9a-f]{64}$'),
    feedback_ids uuid[] NOT NULL CHECK(cardinality(feedback_ids) > 0),
    created_at timestamptz NOT NULL DEFAULT clock_timestamp(),
    PRIMARY KEY(improvement_id,revision)
);
CREATE TABLE public.muse_improvement_action (
    action_id uuid PRIMARY KEY,
    author_id text NOT NULL,
    command_id text NOT NULL,
    improvement_id uuid NOT NULL,
    revision integer NOT NULL,
    kind text NOT NULL CHECK(kind IN ('validation','enable','disable')),
    payload jsonb NOT NULL,
    content_hash text NOT NULL CHECK(content_hash ~ '^[0-9a-f]{64}$'),
    created_at timestamptz NOT NULL DEFAULT clock_timestamp(),
    UNIQUE(author_id,command_id),
    FOREIGN KEY(improvement_id,revision) REFERENCES public.muse_improvement_version
);
CREATE TABLE public.muse_improvement_result (
    action_id uuid PRIMARY KEY REFERENCES public.muse_improvement_action,
    receipt jsonb NOT NULL,
    receipt_hash text NOT NULL CHECK(receipt_hash ~ '^[0-9a-f]{64}$'),
    created_at timestamptz NOT NULL DEFAULT clock_timestamp()
);
CREATE TRIGGER muse_improvement_version_immutable BEFORE UPDATE OR DELETE
    ON public.muse_improvement_version FOR EACH ROW
    EXECUTE FUNCTION public.muse_guard_literary_history();
CREATE TRIGGER muse_improvement_action_immutable BEFORE UPDATE OR DELETE
    ON public.muse_improvement_action FOR EACH ROW
    EXECUTE FUNCTION public.muse_guard_literary_history();
CREATE TRIGGER muse_improvement_result_immutable BEFORE UPDATE OR DELETE
    ON public.muse_improvement_result FOR EACH ROW
    EXECUTE FUNCTION public.muse_guard_literary_history();
REVOKE ALL ON public.muse_improvement,public.muse_improvement_version,
    public.muse_improvement_action,public.muse_improvement_result FROM muse_eval;
GRANT SELECT,INSERT,UPDATE ON public.muse_improvement TO muse_app;
GRANT SELECT,INSERT ON public.muse_improvement_version,public.muse_improvement_action,
    public.muse_improvement_result TO muse_app;