Complete Phase 12 grammar module

internal/modules/grammar/module.go

@@ -0,0 +1,76 @@
+package grammar
+
+import (
+	"context"
+	"fmt"
+
+	"gitea.maximumdirect.net/eric/audita/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/audita/internal/framework/proposal_generation"
+	"gitea.maximumdirect.net/eric/audita/internal/framework/proposals"
+	"gitea.maximumdirect.net/eric/audita/internal/framework/validators"
+)
+
+type Module struct {
+	validators []contracts.Validator
+}
+
+func New() (*Module, error) {
+	grammarOnlyGuard, err := validators.NewLLMBackedValidator("grammar_only_guard", validators.LLMValidatorTypeGrammarReview, "")
+	if err != nil {
+		return nil, err
+	}
+	meaningReversal, err := validators.NewLLMBackedValidator("meaning_reversal_review", validators.LLMValidatorTypeMeaningReversal, "")
+	if err != nil {
+		return nil, err
+	}
+
+	return &Module{
+		validators: []contracts.Validator{
+			validators.NoEffectValidator{},
+			validators.OriginalTextPresenceValidator{},
+			validators.ConfidenceThresholdValidator{},
+			validators.ProtectedGlossaryTermValidator{},
+			validators.NonEmptyCorrectionValidator{},
+			grammarOnlyGuard,
+			meaningReversal,
+		},
+	}, nil
+}
+
+func (m *Module) Key() string { return "grammar" }
+
+func (m *Module) ReplacementPolicy() proposals.ReplacementPolicy {
+	// Python grammar module uses require_unique for conservative single-span replacement.
+	return proposals.ReplacementPolicyRequireUnique
+}
+
+func (m *Module) Validators() []contracts.Validator {
+	return append([]contracts.Validator(nil), m.validators...)
+}
+
+func (m *Module) Propose(ctx context.Context, req contracts.ProposalRequest) ([]proposals.CorrectionProposal, error) {
+	messages, err := BuildProposalMessages(req.WorkingTranscript, req.Glossary)
+	if err != nil {
+		return nil, err
+	}
+
+	generated, err := proposal_generation.GenerateCandidates(ctx, proposal_generation.Request{
+		ModuleKey:         req.RunSpec.ModuleKey,
+		ModuleInstance:    req.RunSpec.InstanceName,
+		ReplacementPolicy: req.RunSpec.ReplacementPolicy,
+		WorkingTranscript: req.WorkingTranscript,
+		Section:           req.Section,
+		Glossary:          req.Glossary,
+		Config:            req.Config,
+		Messages:          messages,
+		StageName:         fmt.Sprintf("%s:proposal", req.RunSpec.InstanceName),
+		StartIndex:        0,
+		LLMClient:         req.LLMClient,
+		Scheduler:         req.LLMScheduler,
+		DiagnosticsDir:    req.DiagnosticsDir,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return generated.Corrections, nil
+}