fix: serialize graph synthesis request fields

adapters/postgres/work_repository.go

@@ -199,6 +199,26 @@ func (r *WorkRepository) LoadWorkGraph(ctx context.Context, graphID string, revi
 	return graph, nil
 }
 
+func (r *WorkRepository) SaveGraphSynthesis(ctx context.Context, conflict work.ConflictSet, candidates []work.ResultCandidate, synthesis work.GraphSynthesisCandidate) error {
+	tx, err := r.pool.Begin(ctx)
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback(ctx)
+	for _, candidate := range candidates {
+		if _, err := tx.Exec(ctx, `INSERT INTO work.graph_result_candidates(result_candidate_id,graph_id,graph_revision,node_id,author_run_id,artifact_refs,evidence_summary,summary) VALUES($1,$2,$3,$4,$5,$6,$7,$8) ON CONFLICT(result_candidate_id) DO NOTHING`, candidate.ID, candidate.GraphID, candidate.GraphRevision, candidate.NodeID, candidate.AuthorRunID, candidate.ArtifactRefs, candidate.EvidenceSummary, candidate.Summary); err != nil {
+			return err
+		}
+	}
+	if _, err := tx.Exec(ctx, `INSERT INTO work.graph_conflicts(conflict_id,graph_id,graph_revision,node_id,candidate_ids,resolved) VALUES($1,$2,$3,$4,$5,$6) ON CONFLICT(conflict_id) DO NOTHING`, conflict.ID, conflict.GraphID, conflict.GraphRevision, conflict.NodeID, conflict.CandidateIDs, conflict.Resolved); err != nil {
+		return err
+	}
+	if _, err := tx.Exec(ctx, `INSERT INTO work.graph_synthesis_candidates(synthesis_id,graph_id,graph_revision,node_id,candidate_ids,selected_candidate_id,dissent_candidate_ids,verifier_run_id,verifier_identity,evidence_refs,summary,state) VALUES($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12) ON CONFLICT(synthesis_id) DO NOTHING`, synthesis.ID, synthesis.GraphID, synthesis.GraphRevision, synthesis.NodeID, synthesis.CandidateIDs, synthesis.SelectedCandidateID, synthesis.DissentCandidateIDs, synthesis.VerifierRunID, synthesis.VerifierIdentity, synthesis.EvidenceRefs, synthesis.Summary, synthesis.State); err != nil {
+		return err
+	}
+	return tx.Commit(ctx)
+}
+
 func (r *WorkRepository) RecoverStaleClaims(ctx context.Context, nowUnixMillis, staleAfterMillis int64) (int64, error) {
 	command, err := r.pool.Exec(ctx, `UPDATE work.agent_dispatch_queue SET state='QUEUED',claimed_by='',updated_at_unix_millis=$1 WHERE state='CLAIMED' AND updated_at_unix_millis <= $2`, nowUnixMillis, nowUnixMillis-staleAfterMillis)
 	if err != nil {

cmd/work-graph-runtime/main.go

@@ -55,6 +55,19 @@ func main() {
 		}
 		writeJSON(w, graph)
 	})
+	mux.HandleFunc("POST /v1/work-graphs/synthesis", func(w http.ResponseWriter, r *http.Request) {
+		var request application.GraphSynthesisRequest
+		if err := json.NewDecoder(http.MaxBytesReader(w, r.Body, 4<<20)).Decode(&request); err != nil {
+			http.Error(w, "invalid graph synthesis request", http.StatusBadRequest)
+			return
+		}
+		conflict, synthesis, err := application.SynthesizeGraph(r.Context(), repository, request)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusUnprocessableEntity)
+			return
+		}
+		writeJSON(w, map[string]any{"conflict": conflict, "synthesis": synthesis})
+	})
 	addr := os.Getenv("LISTEN_ADDR")
 	if addr == "" {
 		addr = ":8088"

contracts/work/graph.go

@@ -53,21 +53,43 @@ type WorkGraph struct {
 }
 
 type ResultCandidate struct {
-	ID              string
-	GraphID         string
-	GraphRevision   int64
-	NodeID          GraphNodeID
-	AuthorRunID     AgentRunID
-	ArtifactRefs    []EvidenceRef
-	EvidenceSummary string
-	Summary         string
+	ID              string        `json:"id"`
+	GraphID         string        `json:"graph_id"`
+	GraphRevision   int64         `json:"graph_revision"`
+	NodeID          GraphNodeID   `json:"node_id"`
+	AuthorRunID     AgentRunID    `json:"author_run_id"`
+	ArtifactRefs    []EvidenceRef `json:"artifact_refs"`
+	EvidenceSummary string        `json:"evidence_summary"`
+	Summary         string        `json:"summary"`
 }
 
 type ConflictSet struct {
-	ID            string
-	GraphID       string
-	GraphRevision int64
-	NodeID        GraphNodeID
-	CandidateIDs  []string
-	Resolved      bool
+	ID            string      `json:"id"`
+	GraphID       string      `json:"graph_id"`
+	GraphRevision int64       `json:"graph_revision"`
+	NodeID        GraphNodeID `json:"node_id"`
+	CandidateIDs  []string    `json:"candidate_ids"`
+	Resolved      bool        `json:"resolved"`
+}
+
+type GraphSynthesisState string
+
+const GraphSynthesisVerified GraphSynthesisState = "VERIFIED"
+
+// GraphSynthesisCandidate retains every competing result while recording the
+// independently verified selection. It is a candidate, not an external action
+// or authority grant.
+type GraphSynthesisCandidate struct {
+	ID                  string              `json:"id"`
+	GraphID             string              `json:"graph_id"`
+	GraphRevision       int64               `json:"graph_revision"`
+	NodeID              GraphNodeID         `json:"node_id"`
+	CandidateIDs        []string            `json:"candidate_ids"`
+	SelectedCandidateID string              `json:"selected_candidate_id"`
+	DissentCandidateIDs []string            `json:"dissent_candidate_ids"`
+	VerifierRunID       AgentRunID          `json:"verifier_run_id"`
+	VerifierIdentity    string              `json:"verifier_identity"`
+	EvidenceRefs        []EvidenceRef       `json:"evidence_refs"`
+	Summary             string              `json:"summary"`
+	State               GraphSynthesisState `json:"state"`
 }

contracts/work/self_development.go

@@ -1,5 +1,7 @@
 package work
 
+import "time"
+
 type DevelopmentStage string
 
 const (
@@ -27,3 +29,101 @@ type DevelopmentGate struct {
 	PromotionRef         string
 	RollbackRef          string
 }
+
+// ExtensionProposalStage is deliberately proposal-only in this contract. A
+// proposal does not authorize source changes, provider calls, deployment or
+// promotion; those stages require the existing governed development gate.
+type ExtensionProposalStage string
+
+const ExtensionProposalProposed ExtensionProposalStage = "PROPOSED"
+
+// ExtensionEvidence is an immutable reference to an observation that points
+// at a repeated or corroborated improvement signal. The payload is owned by
+// its source module; Work stores only the typed reference and stable signal
+// key.
+type ExtensionEvidence struct {
+	Ref       string
+	SignalKey string
+}
+
+// ExtensionProposalRequest contains the operator/governance information
+// needed to decide whether an evidence pattern is worth reviewing. Empty
+// fields are rejected by the proposal generator rather than inferred.
+type ExtensionProposalRequest struct {
+	ID                  string
+	DesiredOutcome      string
+	SmallestChangeLayer string
+	AffectedOwners      []string
+	AffectedContracts   []string
+	RiskTier            string
+	EvaluationPlan      []string
+	Alternatives        []string
+	RollbackPlan        string
+	Assumptions         []string
+	CreatedAt           time.Time
+}
+
+// ExtensionProposal is a bounded, evidence-bearing candidate for governed
+// development. It intentionally contains no executable command, credential,
+// authority grant, implementation body or promotion decision.
+type ExtensionProposal struct {
+	ID                     string
+	Stage                  ExtensionProposalStage
+	EvidenceRefs           []string
+	DeduplicatedSignalKeys []string
+	DesiredOutcome         string
+	SmallestChangeLayer    string
+	AffectedOwners         []string
+	AffectedContracts      []string
+	RiskTier               string
+	EvaluationPlan         []string
+	Alternatives           []string
+	RollbackPlan           string
+	Assumptions            []string
+	CreatedAtUnixMillis    int64
+}
+
+type DevelopmentScaffoldStage string
+
+const DevelopmentScaffoldSandboxed DevelopmentScaffoldStage = "SANDBOXED"
+
+// DevelopmentScaffoldRequest describes the boundary a later control plane
+// would use to create an isolated worktree. This value object itself performs
+// no checkout or filesystem operation.
+type DevelopmentScaffoldRequest struct {
+	ID                  string
+	ProposalRef         string
+	BaseRepoRevision    string
+	WorktreeRef         string
+	TaskIntent          string
+	Modules             []string
+	AllowedPaths        []string
+	ForbiddenPaths      []string
+	ProtectedPaths      []string
+	RequiredTests       []string
+	ArtifactLineageRefs []string
+	ProtectedMainAccess string
+	ProductionAccess    string
+	SecretAccess        string
+	CreatedAt           time.Time
+}
+
+// DevelopmentScaffold is a provenance-linked task-packet candidate. It has
+// no executable instruction, credential, checkout handle or authority grant.
+type DevelopmentScaffold struct {
+	ID                  string
+	Stage               DevelopmentScaffoldStage
+	ProposalRef         string
+	BaseRepoRevision    string
+	WorktreeRef         string
+	TaskIntent          string
+	Modules             []string
+	AllowedPaths        []string
+	ForbiddenPaths      []string
+	RequiredTests       []string
+	ArtifactLineageRefs []string
+	ProtectedMainAccess string
+	ProductionAccess    string
+	SecretAccess        string
+	CreatedAtUnixMillis int64
+}

database/migrations/036_work_graph_result_synthesis.sql

@@ -0,0 +1,58 @@
+BEGIN;
+
+SET ROLE work_role;
+
+CREATE TABLE IF NOT EXISTS work.graph_result_candidates (
+  result_candidate_id TEXT PRIMARY KEY,
+  graph_id TEXT NOT NULL,
+  graph_revision BIGINT NOT NULL,
+  node_id TEXT NOT NULL,
+  author_run_id TEXT NOT NULL,
+  artifact_refs TEXT[] NOT NULL DEFAULT ARRAY[]::TEXT[],
+  evidence_summary TEXT NOT NULL,
+  summary TEXT NOT NULL,
+  recorded_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  CHECK (result_candidate_id <> ''), CHECK (graph_id <> ''), CHECK (graph_revision > 0),
+  CHECK (node_id <> ''), CHECK (author_run_id <> ''), CHECK (evidence_summary <> ''), CHECK (summary <> ''),
+  FOREIGN KEY (graph_id, graph_revision) REFERENCES work.graphs(graph_id, revision)
+);
+
+CREATE TABLE IF NOT EXISTS work.graph_conflicts (
+  conflict_id TEXT PRIMARY KEY,
+  graph_id TEXT NOT NULL,
+  graph_revision BIGINT NOT NULL,
+  node_id TEXT NOT NULL,
+  candidate_ids TEXT[] NOT NULL,
+  resolved BOOLEAN NOT NULL DEFAULT FALSE,
+  recorded_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  CHECK (conflict_id <> ''), CHECK (graph_id <> ''), CHECK (graph_revision > 0), CHECK (node_id <> ''),
+  CHECK (cardinality(candidate_ids) >= 2),
+  FOREIGN KEY (graph_id, graph_revision) REFERENCES work.graphs(graph_id, revision)
+);
+
+CREATE TABLE IF NOT EXISTS work.graph_synthesis_candidates (
+  synthesis_id TEXT PRIMARY KEY,
+  graph_id TEXT NOT NULL,
+  graph_revision BIGINT NOT NULL,
+  node_id TEXT NOT NULL,
+  candidate_ids TEXT[] NOT NULL,
+  selected_candidate_id TEXT NOT NULL,
+  dissent_candidate_ids TEXT[] NOT NULL DEFAULT ARRAY[]::TEXT[],
+  verifier_run_id TEXT NOT NULL,
+  verifier_identity TEXT NOT NULL,
+  evidence_refs TEXT[] NOT NULL,
+  summary TEXT NOT NULL,
+  state TEXT NOT NULL,
+  recorded_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  CHECK (synthesis_id <> ''), CHECK (graph_id <> ''), CHECK (graph_revision > 0), CHECK (node_id <> ''),
+  CHECK (cardinality(candidate_ids) >= 2), CHECK (selected_candidate_id <> ''), CHECK (verifier_run_id <> ''),
+  CHECK (verifier_identity <> ''), CHECK (cardinality(evidence_refs) >= 1), CHECK (summary <> ''), CHECK (state = 'VERIFIED'),
+  FOREIGN KEY (graph_id, graph_revision) REFERENCES work.graphs(graph_id, revision)
+);
+
+CREATE INDEX IF NOT EXISTS graph_result_candidates_node_idx ON work.graph_result_candidates(graph_id, graph_revision, node_id);
+CREATE INDEX IF NOT EXISTS graph_conflicts_node_idx ON work.graph_conflicts(graph_id, graph_revision, node_id);
+CREATE INDEX IF NOT EXISTS graph_synthesis_node_idx ON work.graph_synthesis_candidates(graph_id, graph_revision, node_id);
+
+RESET ROLE;
+COMMIT;

dev/ACTIVE_TASK.json

@@ -1,5 +1,5 @@
 {
-  "task_file": "dev/tasks/DEV-000185-agent-bridge-protected-config.json",
-  "task_id": "DEV-000185",
+  "task_file": "dev/tasks/DEV-000189-durable-graph-synthesis-runtime.json",
+  "task_id": "DEV-000189",
   "task_revision": 1
 }

dev/tasks/DEV-000186-extension-proposal-generator.json

@@ -0,0 +1,37 @@
+{
+  "task_id": "DEV-000186",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "cdbccb6",
+  "risk_tier": "E",
+  "intent": "Add a typed, proposal-only ExtensionProposal generator from repeated or corroborated evidence without granting mutation, authority, deployment, or promotion capability.",
+  "requirement_ids": ["WP-601", "Extension proposal generator", "Evidence deduplication", "Governed rollback plan"],
+  "allowed_change_scope": {
+    "modules": ["work-agent-execution"],
+    "paths": ["contracts/work/self_development.go", "modules/work/domain/self_development.go", "modules/work/domain/self_development_test.go", "tests/semantic_evolution/self_development_contract_test.go", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000186-extension-proposal-generator.json"]
+  },
+  "forbidden_change_scope": {
+    "paths": ["architecture/**", "security/**", "database/**", "cmd/**", "adapters/**", "deploy/**", "contracts/authority/**", ".gitea/**"]
+  },
+  "allowed_architecture_delta": {
+    "new_cross_module_dependencies": 0,
+    "new_canonical_owners": 0,
+    "new_privileges": 0,
+    "new_third_party_dependencies": 0,
+    "new_database_owner_roles": 0
+  },
+  "contracts": {
+    "consume": ["ADR-0022 governed self-development boundary", "existing Work DevelopmentGate"],
+    "may_change": ["typed Work ExtensionProposal value objects"]
+  },
+  "semantic_owner": "work-agent-execution",
+  "canonical_state": ["No durable canonical state; proposal value object only"],
+  "state_transitions": ["repeated evidence -> PROPOSED ExtensionProposal", "insufficient/conflicting/incomplete evidence -> rejected result"],
+  "side_effects_and_privileges": ["No source mutation, provider invocation, secret access, deployment, promotion, or authority expansion"],
+  "persistence_and_migrations": ["No schema or migration changes"],
+  "failure_retry_restart": ["Deterministic generation is rerunnable; unique evidence refs and signal keys preserve lineage; one failure cannot generate a proposal"],
+  "assumptions": ["Human governance remains the promotion authority", "A later task may add durable proposal persistence only after owner and migration review"],
+  "acceptance_scenarios": ["one failure is rejected", "repeated same-signal evidence produces one proposal with deduplicated signal keys and retained refs", "missing assumptions/evaluation/rollback fails closed", "proposal contains no executable authority or mutation field"],
+  "required_tests": ["go test ./modules/work/domain ./tests/semantic_evolution", "go vet ./...", "go run ./cmd/devctl preflight -task dev/tasks/DEV-000186-extension-proposal-generator.json", "go run ./cmd/devctl check-diff -task dev/tasks/DEV-000186-extension-proposal-generator.json", "go run ./cmd/devctl check-architecture", "go run ./cmd/devctl independent", "git diff --check", "CI"],
+  "terminal_gap_states": ["BLOCKED_BY_ARCHITECTURE_GAP", "BLOCKED_BY_SPEC_GAP", "BLOCKED_BY_CONFLICT"]
+}

dev/tasks/DEV-000187-scaffold-task-packet-candidate.json

@@ -0,0 +1,26 @@
+{
+  "task_id": "DEV-000187",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "a09a7e8",
+  "risk_tier": "E",
+  "intent": "Add a fail-closed typed scaffold candidate factory that produces an isolated task-packet descriptor without creating files, reading secrets, or accessing protected main/production.",
+  "requirement_ids": ["WP-602", "Scoped task packet candidate", "Isolated worktree provenance", "Protected path denial"],
+  "allowed_change_scope": {
+    "modules": ["work-agent-execution"],
+    "paths": ["contracts/work/self_development.go", "modules/work/domain/self_development.go", "modules/work/domain/self_development_test.go", "tests/semantic_evolution/self_development_contract_test.go", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000187-scaffold-task-packet-candidate.json"]
+  },
+  "forbidden_change_scope": {"paths": ["architecture/**", "security/**", "database/**", "cmd/**", "adapters/**", "deploy/**", "contracts/authority/**", ".gitea/**"]},
+  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
+  "contracts": {"consume": ["Existing ExtensionProposal", "ADR-0022 governed development boundary"], "may_change": ["typed Work scaffold candidate value objects"]},
+  "semantic_owner": "work-agent-execution",
+  "canonical_state": ["No durable state; isolated scaffold candidate value object only"],
+  "state_transitions": ["proposal -> SANDBOXED task-packet candidate", "invalid scope/policy -> rejected result"],
+  "side_effects_and_privileges": ["No filesystem mutation, source checkout, secret access, provider call, deployment, promotion, or authority expansion"],
+  "persistence_and_migrations": ["No schema or migration changes"],
+  "failure_retry_restart": ["Deterministic validation is rerunnable; invalid or protected scope fails closed"],
+  "assumptions": ["A later external development control plane performs actual worktree creation", "Human governance remains promotion authority"],
+  "acceptance_scenarios": ["valid proposal produces scoped SANDBOXED descriptor", "absolute/traversal/protected path is rejected", "production and secret access policies must be DENIED", "missing provenance or test plan is rejected", "descriptor contains no command or credential material"],
+  "required_tests": ["go test ./modules/work/domain ./tests/semantic_evolution", "go vet ./...", "go run ./cmd/devctl preflight -task dev/tasks/DEV-000187-scaffold-task-packet-candidate.json", "go run ./cmd/devctl check-diff -task dev/tasks/DEV-000187-scaffold-task-packet-candidate.json", "go run ./cmd/devctl check-architecture", "go run ./cmd/devctl independent", "git diff --check", "CI"],
+  "terminal_gap_states": ["BLOCKED_BY_ARCHITECTURE_GAP", "BLOCKED_BY_SPEC_GAP", "BLOCKED_BY_CONFLICT"]
+}

dev/tasks/DEV-000188-graph-synthesis-independent-verifier.json

@@ -0,0 +1,23 @@
+{
+  "task_id": "DEV-000188",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "4d9d1b8",
+  "risk_tier": "E",
+  "intent": "Add typed Work Graph synthesis and independent-verifier gating so conflicting node results remain attributable and cannot be resolved by the producing run.",
+  "requirement_ids": ["WP-403", "ResultCandidate conflict retention", "Synthesis candidate", "Independent graph verifier"],
+  "allowed_change_scope": {"modules": ["work-agent-execution"], "paths": ["contracts/work/graph.go", "modules/work/domain/graph_scheduler.go", "tests/agent_execution/graph_test.go", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000188-graph-synthesis-independent-verifier.json"]},
+  "forbidden_change_scope": {"paths": ["architecture/**", "security/**", "database/**", "cmd/**", "adapters/**", "deploy/**", "contracts/authority/**", ".gitea/**"]},
+  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
+  "contracts": {"consume": ["Existing WorkGraph, ResultCandidate and ConflictSet contracts", "IndependentVerification semantics"], "may_change": ["typed GraphSynthesisCandidate contract"]},
+  "semantic_owner": "work-agent-execution",
+  "canonical_state": ["No new persistence; typed graph synthesis candidate only"],
+  "state_transitions": ["conflicting candidates -> attributable synthesis candidate", "verified independent synthesis -> resolved conflict", "failed/forged/self-verification -> rejected"],
+  "side_effects_and_privileges": ["No external mutation, provider call, deployment, or authority expansion"],
+  "persistence_and_migrations": ["No schema or migration changes"],
+  "failure_retry_restart": ["Dissent and candidate lineage are retained; verifier must differ from every producer; rejected synthesis does not resolve conflict"],
+  "assumptions": ["Durable persistence and runtime orchestration already exist and are unchanged", "A later runtime task may persist this typed result"],
+  "acceptance_scenarios": ["conflicting candidates remain attributable", "same producer cannot verify synthesis", "unknown candidate or missing evidence fails closed", "successful independent verification retains dissent and resolves conflict"],
+  "required_tests": ["go test ./tests/agent_execution", "go vet ./...", "go run ./cmd/devctl preflight -task dev/tasks/DEV-000188-graph-synthesis-independent-verifier.json", "go run ./cmd/devctl check-diff -task dev/tasks/DEV-000188-graph-synthesis-independent-verifier.json", "go run ./cmd/devctl check-architecture", "go run ./cmd/devctl independent", "git diff --check", "CI"],
+  "terminal_gap_states": ["BLOCKED_BY_ARCHITECTURE_GAP", "BLOCKED_BY_SPEC_GAP", "BLOCKED_BY_CONFLICT"]
+}

dev/tasks/DEV-000189-durable-graph-synthesis-runtime.json

@@ -0,0 +1,23 @@
+{
+  "task_id": "DEV-000189",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "41bc4b5",
+  "risk_tier": "E",
+  "intent": "Persist Work Graph result candidates, conflicts and independently verified synthesis through the work owner and expose the governed synthesis runtime path.",
+  "requirement_ids": ["WP-403", "Durable graph result evidence", "Durable conflict resolution", "Synthesis runtime endpoint"],
+  "allowed_change_scope": {"modules": ["work-agent-execution", "work-storage", "work-graph-runtime"], "paths": ["contracts/work/graph.go", "database/migrations/036_work_graph_result_synthesis.sql", "adapters/postgres/work_repository.go", "modules/work/ports/graph.go", "modules/work/application/graph_runtime.go", "cmd/work-graph-runtime/main.go", "tests/agent_execution/graph_persistence_sql_test.go", "tests/agent_execution/graph_runtime_test.go", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000189-durable-graph-synthesis-runtime.json"]},
+  "forbidden_change_scope": {"paths": ["architecture/**", "security/**", "contracts/authority/**", "modules/epistemics/**", "deploy/**", ".gitea/**"]},
+  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 1},
+  "contracts": {"consume": ["Existing Work Graph ResultCandidate/ConflictSet/GraphSynthesisCandidate contracts", "WP-403 independent verifier gate"], "may_change": ["GraphResult JSON serialization tags", "GraphStore persistence port"]},
+  "semantic_owner": "work-agent-execution",
+  "canonical_state": ["work.graph_result_candidates", "work.graph_conflicts", "work.graph_synthesis_candidates"],
+  "state_transitions": ["result candidate append -> conflict append -> independently verified synthesis append", "failed verification does not persist a resolved synthesis"],
+  "side_effects_and_privileges": ["Work schema writes only; no external mutation, provider call, secret expansion, or authority change"],
+  "persistence_and_migrations": ["Append-only migration 036; one owner-local transaction persists candidates, conflict and synthesis"],
+  "failure_retry_restart": ["Idempotent exact-record inserts; transaction rollback preserves no partial resolution; restart reloads durable evidence"],
+  "assumptions": ["Production migration runner applies migration before runtime endpoint use", "Authenticated upstream boundary already protects runtime access"],
+  "acceptance_scenarios": ["SQL is revision scoped and work-owned", "runtime rejects invalid/self-verifying synthesis", "successful synthesis persists all candidates, dissent and verifier identity atomically", "production canary returns durable success without external side effect"],
+  "required_tests": ["go test ./...", "go vet ./...", "go run ./cmd/devctl preflight -task dev/tasks/DEV-000189-durable-graph-synthesis-runtime.json", "go run ./cmd/devctl check-diff -task dev/tasks/DEV-000189-durable-graph-synthesis-runtime.json", "go run ./cmd/devctl check-architecture", "go run ./cmd/devctl independent", "git diff --check", "CI", "production migration/readiness and authenticated synthesis canary"],
+  "terminal_gap_states": ["BLOCKED_BY_MIGRATION_DECISION", "BLOCKED_BY_SPEC_GAP", "BLOCKED_BY_CONFLICT"]
+}

modules/work/application/graph_runtime.go

@@ -25,6 +25,28 @@ type GraphCompleteRequest struct {
 	Succeeded bool             `json:"succeeded"`
 }
 
+type GraphSynthesisRequest struct {
+	Conflict          work.ConflictSet       `json:"conflict"`
+	Candidates        []work.ResultCandidate `json:"candidates"`
+	SelectedCandidate string                 `json:"selected_candidate_id"`
+	VerifierRunID     work.AgentRunID        `json:"verifier_run_id"`
+	VerifierIdentity  string                 `json:"verifier_identity"`
+	EvidenceRefs      []work.EvidenceRef     `json:"evidence_refs"`
+	Summary           string                 `json:"summary"`
+	Verified          bool                   `json:"verified"`
+}
+
+func SynthesizeGraph(ctx context.Context, store ports.GraphResultStore, request GraphSynthesisRequest) (work.ConflictSet, work.GraphSynthesisCandidate, error) {
+	conflict, synthesis, err := domain.BuildVerifiedGraphSynthesis(request.Conflict, request.Candidates, request.SelectedCandidate, request.VerifierRunID, request.VerifierIdentity, request.EvidenceRefs, request.Summary, request.Verified)
+	if err != nil {
+		return work.ConflictSet{}, work.GraphSynthesisCandidate{}, err
+	}
+	if err := store.SaveGraphSynthesis(ctx, conflict, request.Candidates, synthesis); err != nil {
+		return work.ConflictSet{}, work.GraphSynthesisCandidate{}, err
+	}
+	return conflict, synthesis, nil
+}
+
 func AdmitAndSchedule(ctx context.Context, store ports.GraphStore, request GraphScheduleRequest) (work.WorkGraph, []work.GraphNodeID, error) {
 	if request.Now < 1 {
 		request.Now = time.Now().UnixMilli()

modules/work/domain/graph_scheduler.go

@@ -8,10 +8,57 @@ import (
 )
 
 var (
-	ErrGraphBudgetExceeded = errors.New("work graph budget exceeded")
-	ErrConflictUnresolved  = errors.New("conflict resolution is not explicit")
+	ErrGraphBudgetExceeded    = errors.New("work graph budget exceeded")
+	ErrConflictUnresolved     = errors.New("conflict resolution is not explicit")
+	ErrGraphSynthesisRejected = errors.New("graph synthesis rejected")
 )
 
+// BuildVerifiedGraphSynthesis resolves a conflict only after an independent
+// verifier has evaluated all candidates. The verifier may not be any result
+// producer, and every candidate remains in the returned lineage.
+func BuildVerifiedGraphSynthesis(conflict work.ConflictSet, candidates []work.ResultCandidate, selectedCandidate string, verifierRunID work.AgentRunID, verifierIdentity string, evidence []work.EvidenceRef, summary string, verified bool) (work.ConflictSet, work.GraphSynthesisCandidate, error) {
+	if conflict.ID == "" || conflict.GraphID == "" || conflict.GraphRevision < 1 || conflict.NodeID == "" || conflict.Resolved || len(conflict.CandidateIDs) < 2 || selectedCandidate == "" || verifierRunID == "" || verifierIdentity == "" || len(evidence) == 0 || summary == "" || !verified {
+		return work.ConflictSet{}, work.GraphSynthesisCandidate{}, ErrGraphSynthesisRejected
+	}
+	candidateByID := make(map[string]work.ResultCandidate, len(candidates))
+	for _, candidate := range candidates {
+		if candidate.ID == "" || candidate.GraphID != conflict.GraphID || candidate.GraphRevision != conflict.GraphRevision || candidate.NodeID != conflict.NodeID || candidate.AuthorRunID == "" {
+			return work.ConflictSet{}, work.GraphSynthesisCandidate{}, ErrGraphSynthesisRejected
+		}
+		candidateByID[candidate.ID] = candidate
+		if candidate.AuthorRunID == verifierRunID {
+			return work.ConflictSet{}, work.GraphSynthesisCandidate{}, ErrGraphSynthesisRejected
+		}
+	}
+	ordered := append([]string(nil), conflict.CandidateIDs...)
+	for _, id := range ordered {
+		if _, ok := candidateByID[id]; !ok {
+			return work.ConflictSet{}, work.GraphSynthesisCandidate{}, ErrGraphSynthesisRejected
+		}
+	}
+	if !containsString(ordered, selectedCandidate) {
+		return work.ConflictSet{}, work.GraphSynthesisCandidate{}, ErrGraphSynthesisRejected
+	}
+	dissent := make([]string, 0, len(ordered)-1)
+	for _, id := range ordered {
+		if id != selectedCandidate {
+			dissent = append(dissent, id)
+		}
+	}
+	conflict.Resolved = true
+	synthesis := work.GraphSynthesisCandidate{ID: conflict.ID + ":synthesis", GraphID: conflict.GraphID, GraphRevision: conflict.GraphRevision, NodeID: conflict.NodeID, CandidateIDs: ordered, SelectedCandidateID: selectedCandidate, DissentCandidateIDs: dissent, VerifierRunID: verifierRunID, VerifierIdentity: verifierIdentity, EvidenceRefs: append([]work.EvidenceRef(nil), evidence...), Summary: summary, State: work.GraphSynthesisVerified}
+	return conflict, synthesis, nil
+}
+
+func containsString(values []string, target string) bool {
+	for _, value := range values {
+		if value == target {
+			return true
+		}
+	}
+	return false
+}
+
 func ScheduleReadyNodes(graph work.WorkGraph, active int) ([]work.GraphNodeID, error) {
 	if err := ValidateWorkGraph(graph); err != nil {
 		return nil, err

modules/work/domain/self_development.go

@@ -3,11 +3,147 @@ package domain
 import (
 	"errors"
 	"slices"
+	"strings"
 
 	"git.cin.su/m/Assistant/contracts/work"
 )
 
 var ErrInvalidDevelopmentGate = errors.New("invalid governed self-development gate")
+var ErrInsufficientExtensionEvidence = errors.New("insufficient repeated extension evidence")
+var ErrInvalidExtensionProposal = errors.New("invalid extension proposal")
+var ErrInvalidDevelopmentScaffold = errors.New("invalid development scaffold candidate")
+
+// BuildExtensionProposal deterministically turns a repeated evidence signal
+// into a proposal. It retains every distinct evidence reference for lineage,
+// while deduplicating signal keys so repeated reports do not create duplicate
+// proposals. It never creates a task, mutates an implementation or grants
+// authority.
+func BuildExtensionProposal(evidence []work.ExtensionEvidence, request work.ExtensionProposalRequest) (work.ExtensionProposal, error) {
+	owners := cleanStrings(request.AffectedOwners)
+	contracts := cleanStrings(request.AffectedContracts)
+	evaluation := cleanStrings(request.EvaluationPlan)
+	alternatives := cleanStrings(request.Alternatives)
+	assumptions := cleanStrings(request.Assumptions)
+	if request.ID == "" || request.CreatedAt.IsZero() || strings.TrimSpace(request.DesiredOutcome) == "" || strings.TrimSpace(request.SmallestChangeLayer) == "" || strings.TrimSpace(request.RiskTier) == "" || strings.TrimSpace(request.RollbackPlan) == "" || len(owners) == 0 || len(contracts) == 0 || len(evaluation) == 0 || len(alternatives) == 0 || len(assumptions) == 0 {
+		return work.ExtensionProposal{}, ErrInvalidExtensionProposal
+	}
+	refs := make([]string, 0, len(evidence))
+	refSeen := make(map[string]struct{}, len(evidence))
+	counts := make(map[string]int, len(evidence))
+	keys := make([]string, 0, len(evidence))
+	keySeen := make(map[string]struct{}, len(evidence))
+	for _, item := range evidence {
+		ref := strings.TrimSpace(item.Ref)
+		key := strings.TrimSpace(item.SignalKey)
+		if ref == "" || key == "" {
+			return work.ExtensionProposal{}, ErrInvalidExtensionProposal
+		}
+		if _, ok := refSeen[ref]; !ok {
+			refs = append(refs, ref)
+			refSeen[ref] = struct{}{}
+		}
+		counts[key]++
+		if _, ok := keySeen[key]; !ok {
+			keys = append(keys, key)
+			keySeen[key] = struct{}{}
+		}
+	}
+	if len(refs) < 2 {
+		return work.ExtensionProposal{}, ErrInsufficientExtensionEvidence
+	}
+	repeated := false
+	for _, count := range counts {
+		if count >= 2 {
+			repeated = true
+			break
+		}
+	}
+	if !repeated {
+		return work.ExtensionProposal{}, ErrInsufficientExtensionEvidence
+	}
+	return work.ExtensionProposal{
+		ID: request.ID, Stage: work.ExtensionProposalProposed, EvidenceRefs: refs, DeduplicatedSignalKeys: keys,
+		DesiredOutcome: strings.TrimSpace(request.DesiredOutcome), SmallestChangeLayer: strings.TrimSpace(request.SmallestChangeLayer),
+		AffectedOwners: owners, AffectedContracts: contracts,
+		RiskTier: strings.TrimSpace(request.RiskTier), EvaluationPlan: evaluation, Alternatives: alternatives,
+		RollbackPlan: strings.TrimSpace(request.RollbackPlan), Assumptions: assumptions, CreatedAtUnixMillis: request.CreatedAt.UnixMilli(),
+	}, nil
+}
+
+func cleanStrings(values []string) []string {
+	result := make([]string, 0, len(values))
+	seen := make(map[string]struct{}, len(values))
+	for _, value := range values {
+		value = strings.TrimSpace(value)
+		if value == "" {
+			continue
+		}
+		if _, ok := seen[value]; ok {
+			continue
+		}
+		seen[value] = struct{}{}
+		result = append(result, value)
+	}
+	return result
+}
+
+// BuildDevelopmentScaffold creates only a typed, isolated candidate. The
+// caller supplies the protected path set so this domain function cannot infer
+// or widen repository authority from ambient process state.
+func BuildDevelopmentScaffold(request work.DevelopmentScaffoldRequest) (work.DevelopmentScaffold, error) {
+	modules := cleanStrings(request.Modules)
+	allowed := cleanPaths(request.AllowedPaths)
+	forbidden := cleanPaths(request.ForbiddenPaths)
+	protected := cleanPaths(request.ProtectedPaths)
+	tests := cleanStrings(request.RequiredTests)
+	lineage := cleanStrings(request.ArtifactLineageRefs)
+	if request.ID == "" || request.ProposalRef == "" || strings.TrimSpace(request.BaseRepoRevision) == "" || strings.TrimSpace(request.WorktreeRef) == "" || strings.TrimSpace(request.TaskIntent) == "" || request.CreatedAt.IsZero() || len(modules) == 0 || len(allowed) == 0 || len(tests) == 0 || len(lineage) == 0 || request.ProtectedMainAccess != "DENIED" || request.ProductionAccess != "DENIED" || request.SecretAccess != "DENIED" {
+		return work.DevelopmentScaffold{}, ErrInvalidDevelopmentScaffold
+	}
+	for _, path := range allowed {
+		if unsafePath(path) || pathMatchesAny(path, forbidden) || pathMatchesAny(path, protected) {
+			return work.DevelopmentScaffold{}, ErrInvalidDevelopmentScaffold
+		}
+	}
+	worktree := strings.ToLower(strings.TrimSpace(request.WorktreeRef))
+	if worktree == "main" || worktree == "protected-main" || worktree == "production" {
+		return work.DevelopmentScaffold{}, ErrInvalidDevelopmentScaffold
+	}
+	return work.DevelopmentScaffold{ID: request.ID, Stage: work.DevelopmentScaffoldSandboxed, ProposalRef: request.ProposalRef, BaseRepoRevision: strings.TrimSpace(request.BaseRepoRevision), WorktreeRef: strings.TrimSpace(request.WorktreeRef), TaskIntent: strings.TrimSpace(request.TaskIntent), Modules: modules, AllowedPaths: allowed, ForbiddenPaths: forbidden, RequiredTests: tests, ArtifactLineageRefs: lineage, ProtectedMainAccess: "DENIED", ProductionAccess: "DENIED", SecretAccess: "DENIED", CreatedAtUnixMillis: request.CreatedAt.UnixMilli()}, nil
+}
+
+func cleanPaths(values []string) []string {
+	result := make([]string, 0, len(values))
+	seen := make(map[string]struct{}, len(values))
+	for _, value := range values {
+		value = strings.TrimSpace(strings.ReplaceAll(value, "\\", "/"))
+		if value == "" {
+			continue
+		}
+		if _, ok := seen[value]; ok {
+			continue
+		}
+		seen[value] = struct{}{}
+		result = append(result, value)
+	}
+	return result
+}
+
+func unsafePath(path string) bool {
+	return strings.HasPrefix(path, "/") || strings.HasPrefix(path, "~") || (len(path) > 1 && path[1] == ':') || slices.Contains(strings.Split(path, "/"), "..")
+}
+
+func pathMatchesAny(path string, scopes []string) bool {
+	for _, scope := range scopes {
+		scope = strings.TrimSuffix(scope, "/")
+		scope = strings.TrimSuffix(scope, "**")
+		scope = strings.TrimSuffix(scope, "/")
+		if path == scope || strings.HasPrefix(path, scope+"/") {
+			return true
+		}
+	}
+	return false
+}
 
 func AdvanceDevelopmentGate(current work.DevelopmentGate, next work.DevelopmentStage) (work.DevelopmentGate, error) {
 	if err := ValidateDevelopmentGate(current); err != nil {

modules/work/domain/self_development_test.go

@@ -2,6 +2,7 @@ package domain
 
 import (
 	"testing"
+	"time"
 
 	"git.cin.su/m/Assistant/contracts/work"
 )
@@ -20,6 +21,52 @@ func TestGovernedSelfDevelopmentRequiresIndependentVerifierBeforeCanary(t *testi
 	}
 }
 
+func TestBuildExtensionProposalRequiresRepeatedEvidenceAndRetainsLineage(t *testing.T) {
+	proposal, err := BuildExtensionProposal([]work.ExtensionEvidence{
+		{Ref: "reflection-1", SignalKey: "send-email-gap"},
+		{Ref: "reflection-2", SignalKey: "send-email-gap"},
+		{Ref: "reflection-2", SignalKey: "send-email-gap"},
+	}, work.ExtensionProposalRequest{
+		ID: "proposal-1", DesiredOutcome: "connect a reviewed email capability", SmallestChangeLayer: "capability-adapter",
+		AffectedOwners: []string{"capability", "commit"}, AffectedContracts: []string{"CapabilityImplementation@v1"}, RiskTier: "D",
+		EvaluationPlan: []string{"fake transport", "adversarial corpus"}, Alternatives: []string{"keep capability gap"},
+		RollbackPlan: "restore previous implementation reference", Assumptions: []string{"human promotion required"}, CreatedAt: time.UnixMilli(42),
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if proposal.Stage != work.ExtensionProposalProposed || len(proposal.EvidenceRefs) != 2 || len(proposal.DeduplicatedSignalKeys) != 1 || proposal.CreatedAtUnixMillis != 42 {
+		t.Fatalf("unexpected proposal: %+v", proposal)
+	}
+}
+
+func TestBuildExtensionProposalRejectsSingleFailureAndIncompleteGovernance(t *testing.T) {
+	request := work.ExtensionProposalRequest{ID: "proposal-1", DesiredOutcome: "x", SmallestChangeLayer: "skill", AffectedOwners: []string{"capability"}, AffectedContracts: []string{"Skill@v1"}, RiskTier: "B", EvaluationPlan: []string{"test"}, Alternatives: []string{"keep current behavior"}, RollbackPlan: "disable", Assumptions: []string{"human review"}, CreatedAt: time.UnixMilli(42)}
+	if _, err := BuildExtensionProposal([]work.ExtensionEvidence{{Ref: "failure-1", SignalKey: "same"}}, request); err != ErrInsufficientExtensionEvidence {
+		t.Fatalf("single failure must be rejected, got %v", err)
+	}
+	request.Assumptions = nil
+	if _, err := BuildExtensionProposal([]work.ExtensionEvidence{{Ref: "failure-1", SignalKey: "same"}, {Ref: "failure-2", SignalKey: "same"}}, request); err != ErrInvalidExtensionProposal {
+		t.Fatalf("missing assumptions must be rejected, got %v", err)
+	}
+}
+
+func TestBuildDevelopmentScaffoldFailsClosedForProtectedScope(t *testing.T) {
+	base := work.DevelopmentScaffoldRequest{ID: "scaffold-1", ProposalRef: "proposal-1", BaseRepoRevision: "abc123", WorktreeRef: "worktree-1", TaskIntent: "add reviewed adapter", Modules: []string{"capability"}, AllowedPaths: []string{"modules/capability/**"}, ForbiddenPaths: []string{"security/**"}, ProtectedPaths: []string{"architecture/**", "deploy/**"}, RequiredTests: []string{"go test ./..."}, ArtifactLineageRefs: []string{"proposal-1"}, ProtectedMainAccess: "DENIED", ProductionAccess: "DENIED", SecretAccess: "DENIED", CreatedAt: time.UnixMilli(1)}
+	scaffold, err := BuildDevelopmentScaffold(base)
+	if err != nil || scaffold.Stage != work.DevelopmentScaffoldSandboxed {
+		t.Fatalf("valid scaffold rejected: %+v %v", scaffold, err)
+	}
+	base.AllowedPaths = []string{"deploy/docker-compose.prod.yml"}
+	if _, err := BuildDevelopmentScaffold(base); err != ErrInvalidDevelopmentScaffold {
+		t.Fatalf("protected path must fail closed, got %v", err)
+	}
+	base.AllowedPaths = []string{"modules/capability/../security"}
+	if _, err := BuildDevelopmentScaffold(base); err != ErrInvalidDevelopmentScaffold {
+		t.Fatalf("traversal path must fail closed, got %v", err)
+	}
+}
+
 func TestGovernedSelfDevelopmentRejectsSameProducerAndVerifier(t *testing.T) {
 	gate := work.DevelopmentGate{ID: "dev-1", Stage: work.DevelopmentIsolated, EvidenceRefs: []string{"obs-1"}, ProducerRunRefs: []work.AgentRunID{"same"}, VerifierRunRefs: []work.AgentRunID{"same"}, VerificationEvidence: "verify-1"}
 	if _, err := AdvanceDevelopmentGate(gate, work.DevelopmentVerified); err == nil {

modules/work/ports/graph.go

@@ -12,3 +12,7 @@ type GraphStore interface {
 	SaveDispatchIntent(context.Context, work.AgentDispatchIntent) error
 	EnqueueDispatch(context.Context, work.AgentDispatchQueueItem) error
 }
+
+type GraphResultStore interface {
+	SaveGraphSynthesis(context.Context, work.ConflictSet, []work.ResultCandidate, work.GraphSynthesisCandidate) error
+}

tests/agent_execution/graph_persistence_sql_test.go

@@ -18,3 +18,16 @@ func TestGraphPersistenceMigrationIsRevisionScoped(t *testing.T) {
 		}
 	}
 }
+
+func TestGraphSynthesisMigrationIsWorkOwnedAndAtomicInputsExist(t *testing.T) {
+	data, err := os.ReadFile("../../database/migrations/036_work_graph_result_synthesis.sql")
+	if err != nil {
+		t.Fatal(err)
+	}
+	sql := string(data)
+	for _, marker := range []string{"work.graph_result_candidates", "work.graph_conflicts", "work.graph_synthesis_candidates", "verifier_run_id", "dissent_candidate_ids", "FOREIGN KEY (graph_id, graph_revision)", "SET ROLE work_role"} {
+		if !strings.Contains(sql, marker) {
+			t.Fatalf("graph synthesis persistence marker missing: %s", marker)
+		}
+	}
+}

tests/agent_execution/graph_runtime_test.go

@@ -2,7 +2,9 @@ package agent_execution_test
 
 import (
 	"context"
+	"encoding/json"
 	"strconv"
+	"strings"
 	"testing"
 
 	"git.cin.su/m/Assistant/contracts/work"
@@ -58,3 +60,37 @@ func TestGraphRuntimeSchedulesFanOutAndCompletesFanIn(t *testing.T) {
 		t.Fatalf("completed=%+v err=%v", completed, err)
 	}
 }
+
+type graphResultStoreStub struct {
+	conflict work.ConflictSet
+	count    int
+}
+
+func (s *graphResultStoreStub) SaveGraphSynthesis(_ context.Context, conflict work.ConflictSet, candidates []work.ResultCandidate, _ work.GraphSynthesisCandidate) error {
+	s.conflict = conflict
+	s.count = len(candidates)
+	return nil
+}
+
+func TestSynthesizeGraphPersistsVerifiedDissent(t *testing.T) {
+	store := &graphResultStoreStub{}
+	conflict, synthesis, err := application.SynthesizeGraph(context.Background(), store, application.GraphSynthesisRequest{
+		Conflict:          work.ConflictSet{ID: "conflict-1", GraphID: "graph-1", GraphRevision: 1, NodeID: "node-1", CandidateIDs: []string{"candidate-a", "candidate-b"}},
+		Candidates:        []work.ResultCandidate{{ID: "candidate-a", GraphID: "graph-1", GraphRevision: 1, NodeID: "node-1", AuthorRunID: "producer-a", EvidenceSummary: "a", Summary: "a"}, {ID: "candidate-b", GraphID: "graph-1", GraphRevision: 1, NodeID: "node-1", AuthorRunID: "producer-b", EvidenceSummary: "b", Summary: "b"}},
+		SelectedCandidate: "candidate-a", VerifierRunID: "verifier-1", VerifierIdentity: "independent", EvidenceRefs: []work.EvidenceRef{"tests:1"}, Summary: "verified", Verified: true,
+	})
+	if err != nil || !conflict.Resolved || synthesis.State != work.GraphSynthesisVerified || store.count != 2 || !store.conflict.Resolved {
+		t.Fatalf("unexpected runtime synthesis: conflict=%+v synthesis=%+v stored=%+v err=%v", conflict, synthesis, store.conflict, err)
+	}
+}
+
+func TestGraphSynthesisJSONUsesStableSnakeCaseContract(t *testing.T) {
+	payload, err := json.Marshal(application.GraphSynthesisRequest{Conflict: work.ConflictSet{ID: "c", GraphID: "g", GraphRevision: 1, NodeID: "n", CandidateIDs: []string{"a", "b"}}, SelectedCandidate: "a", VerifierRunID: "v", VerifierIdentity: "independent", EvidenceRefs: []work.EvidenceRef{"e"}, Summary: "s", Verified: true})
+	if err != nil || !strings.Contains(string(payload), `"graph_id":"g"`) || !strings.Contains(string(payload), `"selected_candidate_id":"a"`) {
+		t.Fatalf("unexpected synthesis JSON: %s err=%v", payload, err)
+	}
+	var decoded application.GraphSynthesisRequest
+	if err := json.Unmarshal(payload, &decoded); err != nil || decoded.Conflict.GraphID != "g" || decoded.SelectedCandidate != "a" || !decoded.Verified {
+		t.Fatalf("snake_case request did not round-trip: %+v err=%v", decoded, err)
+	}
+}

tests/agent_execution/graph_test.go

@@ -56,3 +56,18 @@ func TestGraphSchedulerEnforcesParallelBudgetAndExplicitConflict(t *testing.T) {
 		t.Fatalf("unknown candidate was accepted: %v", err)
 	}
 }
+
+func TestGraphSynthesisRequiresIndependentVerifierAndRetainsDissent(t *testing.T) {
+	conflict := work.ConflictSet{ID: "conflict-1", GraphID: "graph-1", GraphRevision: 1, NodeID: "node-1", CandidateIDs: []string{"candidate-a", "candidate-b"}}
+	candidates := []work.ResultCandidate{{ID: "candidate-a", GraphID: "graph-1", GraphRevision: 1, NodeID: "node-1", AuthorRunID: "producer-a", EvidenceSummary: "a"}, {ID: "candidate-b", GraphID: "graph-1", GraphRevision: 1, NodeID: "node-1", AuthorRunID: "producer-b", EvidenceSummary: "b"}}
+	resolved, synthesis, err := workdomain.BuildVerifiedGraphSynthesis(conflict, candidates, "candidate-a", "verifier-1", "independent-verifier", []work.EvidenceRef{"tests:1"}, "candidate a is supported", true)
+	if err != nil || !resolved.Resolved || synthesis.SelectedCandidateID != "candidate-a" || len(synthesis.DissentCandidateIDs) != 1 || synthesis.VerifierRunID == candidates[0].AuthorRunID {
+		t.Fatalf("unexpected synthesis: conflict=%+v synthesis=%+v err=%v", resolved, synthesis, err)
+	}
+	if _, _, err := workdomain.BuildVerifiedGraphSynthesis(conflict, candidates, "candidate-a", "producer-a", "producer", []work.EvidenceRef{"tests:1"}, "forged", true); err != workdomain.ErrGraphSynthesisRejected {
+		t.Fatalf("producer must not verify its own result, got %v", err)
+	}
+	if _, _, err := workdomain.BuildVerifiedGraphSynthesis(conflict, candidates, "candidate-a", "verifier-1", "independent-verifier", []work.EvidenceRef{"tests:1"}, "failed", false); err != workdomain.ErrGraphSynthesisRejected {
+		t.Fatalf("failed verification must not resolve conflict, got %v", err)
+	}
+}

tests/semantic_evolution/self_development_contract_test.go

@@ -2,6 +2,7 @@ package semantic_evolution_test
 
 import (
 	"testing"
+	"time"
 
 	"git.cin.su/m/Assistant/contracts/work"
 	workdomain "git.cin.su/m/Assistant/modules/work/domain"
@@ -13,3 +14,22 @@ func TestSelfDevelopmentRollbackIsAvailableOnlyFromCanary(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func TestExtensionProposalIsProposalOnlyAndDeduplicatesSignals(t *testing.T) {
+	proposal, err := workdomain.BuildExtensionProposal([]work.ExtensionEvidence{{Ref: "gap-1", SignalKey: "printer-driver"}, {Ref: "gap-2", SignalKey: "printer-driver"}}, work.ExtensionProposalRequest{
+		ID: "proposal-printer", DesiredOutcome: "review printer adapter", SmallestChangeLayer: "capability-adapter", AffectedOwners: []string{"capability"}, AffectedContracts: []string{"CapabilityImplementation@v1"}, RiskTier: "C", EvaluationPlan: []string{"contract tests"}, Alternatives: []string{"retain capability gap"}, RollbackPlan: "disable candidate", Assumptions: []string{"human promotion"}, CreatedAt: time.UnixMilli(7),
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if proposal.Stage != work.ExtensionProposalProposed || len(proposal.DeduplicatedSignalKeys) != 1 {
+		t.Fatalf("unexpected proposal stage/keys: %+v", proposal)
+	}
+}
+
+func TestDevelopmentScaffoldRequiresExplicitDeniedAccessPolicies(t *testing.T) {
+	_, err := workdomain.BuildDevelopmentScaffold(work.DevelopmentScaffoldRequest{ID: "s", ProposalRef: "p", BaseRepoRevision: "r", WorktreeRef: "isolated", TaskIntent: "test", Modules: []string{"work"}, AllowedPaths: []string{"modules/work/**"}, RequiredTests: []string{"go test ./..."}, ArtifactLineageRefs: []string{"p"}, ProtectedMainAccess: "DENIED", ProductionAccess: "DENIED", SecretAccess: "ALLOW", CreatedAt: time.UnixMilli(1)})
+	if err == nil {
+		t.Fatal("secret access must be denied explicitly")
+	}
+}