Define minimal module framework contracts

internal/framework/contracts/contracts.go

@@ -0,0 +1,135 @@
+package contracts
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"gitea.maximumdirect.net/eric/audita/internal/core/chunking"
+	"gitea.maximumdirect.net/eric/audita/internal/core/config"
+	"gitea.maximumdirect.net/eric/audita/internal/core/schema"
+	"gitea.maximumdirect.net/eric/audita/internal/framework/proposals"
+)
+
+// StructuredLLMClient provides provider-agnostic structured completion.
+type StructuredLLMClient interface {
+	CompleteStructured(ctx context.Context, req StructuredCompletionRequest) (StructuredCompletionResponse, error)
+}
+
+// TranscriptModule is the minimal contract for framework-integrated modules.
+type TranscriptModule interface {
+	Key() string
+	ReplacementPolicy() proposals.ReplacementPolicy
+	Validators() []Validator
+	Propose(ctx context.Context, req ProposalRequest) ([]proposals.CorrectionProposal, error)
+}
+
+// Validator evaluates candidate proposals and returns one decision per proposal index.
+type Validator interface {
+	Name() string
+	Validate(ctx context.Context, req ValidationRequest) ([]ValidationDecision, error)
+}
+
+// StructuredCompletionRequest is a transport-neutral structured completion request.
+type StructuredCompletionRequest struct {
+	StageName      string          `json:"stage_name"`
+	Messages       []LLMMessage    `json:"messages"`
+	ResponseSchema json.RawMessage `json:"response_schema,omitempty"`
+}
+
+// StructuredCompletionResponse is a transport-neutral structured completion response payload.
+type StructuredCompletionResponse struct {
+	Content json.RawMessage `json:"content"`
+}
+
+// LLMMessage is a minimal chat message shape for LLM prompts.
+type LLMMessage struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+}
+
+// ModuleRunSpec identifies one resolved module instance in a pipeline.
+type ModuleRunSpec struct {
+	ModuleKey         string                      `json:"module_key"`
+	InstanceName      string                      `json:"instance_name"`
+	ReplacementPolicy proposals.ReplacementPolicy `json:"replacement_policy"`
+}
+
+// SectionMetadata captures chunk-level metadata without embedding full segment payloads.
+type SectionMetadata struct {
+	Index           int `json:"section_index"`
+	StartSegmentID  int `json:"start_segment_id"`
+	EndSegmentID    int `json:"end_segment_id"`
+	EstimatedTokens int `json:"estimated_tokens"`
+}
+
+// SectionMetadataFromSection converts a chunking section into framework metadata.
+func SectionMetadataFromSection(section chunking.Section) SectionMetadata {
+	return SectionMetadata{
+		Index:           section.Index,
+		StartSegmentID:  section.StartSegmentID,
+		EndSegmentID:    section.EndSegmentID,
+		EstimatedTokens: section.EstimatedTokens,
+	}
+}
+
+// ExecutionContext carries shared execution state for proposal generation and validation.
+type ExecutionContext struct {
+	Config            *config.Config     `json:"-"`
+	WorkingTranscript *schema.Transcript `json:"-"`
+	Glossary          *schema.Glossary   `json:"-"`
+	Section           *SectionMetadata   `json:"section,omitempty"`
+	DiagnosticsDir    string             `json:"diagnostics_dir,omitempty"`
+}
+
+// ProposalRequest is the input to module proposal generation.
+type ProposalRequest struct {
+	ExecutionContext
+	RunSpec   ModuleRunSpec       `json:"run_spec"`
+	LLMClient StructuredLLMClient `json:"-"`
+}
+
+// ValidationRequest is the input to validator execution.
+type ValidationRequest struct {
+	ExecutionContext
+	RunSpec            ModuleRunSpec                          `json:"run_spec"`
+	CandidateProposals []proposals.EnrichedCorrectionProposal `json:"candidate_proposals"`
+}
+
+// ValidationDecision is one validator decision for one proposal index.
+type ValidationDecision struct {
+	ProposalIndex int      `json:"proposal_index"`
+	Approved      bool     `json:"approved"`
+	Confidence    *float64 `json:"confidence,omitempty"`
+	Reason        string   `json:"reason,omitempty"`
+}
+
+// ResolveModuleRunSpecs deterministically resolves instance names from logical keys.
+// Repeated keys are suffixed with _<n> (1-based), while singleton keys keep their raw key.
+func ResolveModuleRunSpecs(moduleKeys []string) ([]ModuleRunSpec, error) {
+	totals := make(map[string]int, len(moduleKeys))
+	for i, key := range moduleKeys {
+		if key == "" {
+			return nil, fmt.Errorf("module key at index %d must not be empty", i)
+		}
+		totals[key]++
+	}
+
+	seen := make(map[string]int, len(totals))
+	specs := make([]ModuleRunSpec, len(moduleKeys))
+	for i, key := range moduleKeys {
+		seen[key]++
+
+		name := key
+		if totals[key] > 1 {
+			name = fmt.Sprintf("%s_%d", key, seen[key])
+		}
+
+		specs[i] = ModuleRunSpec{
+			ModuleKey:    key,
+			InstanceName: name,
+		}
+	}
+
+	return specs, nil
+}