diff --git a/ts/packages/base/src/processor/flow-processor.ts b/ts/packages/base/src/processor/flow-processor.ts
index a5c83e7f..15777d02 100644
--- a/ts/packages/base/src/processor/flow-processor.ts
+++ b/ts/packages/base/src/processor/flow-processor.ts
@@ -18,7 +18,7 @@ import {
 } from "./async-processor.js";
 import type { Spec } from "../spec/types.js";
 import type { BackendConsumer, PubSubBackend } from "../backend/types.js";
-import type { FlowDefinition } from "./flow.js";
+import { FlowDefinition } from "./flow.js";
 import { Flow, } from "./flow.js";
 import { topics } from "../schema/topics.js";
 import type {
@@ -128,14 +128,9 @@ const ConfigPushSchema = S.Struct({
   config: S.Record(S.String, S.Unknown),
 });
 
-const FlowDefinitionSchema = S.Struct({
-  topics: S.optionalKey(S.Record(S.String, S.String)),
-  parameters: S.optionalKey(S.Record(S.String, S.Unknown)),
-});
+const FlowDefinitions = S.Record(S.String, FlowDefinition);
 
-const FlowDefinitionsSchema = S.Record(S.String, FlowDefinitionSchema);
-
-const decodeFlowDefinitions = S.decodeUnknownOption(FlowDefinitionsSchema);
+const decodeFlowDefinitions = S.decodeUnknownOption(FlowDefinitions);
 
 export function runFlowProcessorDefinitionScoped<
   FlowRequirements = never,
diff --git a/ts/packages/base/src/processor/flow.ts b/ts/packages/base/src/processor/flow.ts
index ceaa9e36..3d8ea3d9 100644
--- a/ts/packages/base/src/processor/flow.ts
+++ b/ts/packages/base/src/processor/flow.ts
@@ -43,12 +43,14 @@ import type { ProducerSpec } from "../spec/producer-spec.js";
 import type { RequestResponseSpec } from "../spec/request-response-spec.js";
 import type { Spec, SpecRuntimeRequirements } from "../spec/types.js";
 
-export interface FlowDefinition {
+export class FlowDefinition extends S.Class<FlowDefinition>("FlowDefinition")({
   /** Topic overrides keyed by spec name */
-  topics?: Record<string, string>;
+  topics: S.optionalKey(S.Record(S.String, S.String)),
   /** Parameter values keyed by spec name */
-  parameters?: Record<string, unknown>;
-}
+  parameters: S.optionalKey(S.Record(S.String, S.Unknown)),
+}, {
+  description: "Per-flow configuration: topic overrides and parameter values keyed by spec name.",
+}) {}
 
 export interface FlowProducer<T> {
   readonly send: (id: string, message: T) => Effect.Effect<void, MessagingDeliveryError>;
diff --git a/ts/packages/base/src/runtime/messaging-config.ts b/ts/packages/base/src/runtime/messaging-config.ts
index b5ef1bc8..67d1f892 100644
--- a/ts/packages/base/src/runtime/messaging-config.ts
+++ b/ts/packages/base/src/runtime/messaging-config.ts
@@ -3,22 +3,25 @@
  */
 
 import { Config, Duration, Effect } from "effect";
+import * as S from "effect/Schema";
 
-export interface MessagingRuntimeConfig {
-  readonly consumerReceiveTimeout: Duration.Duration;
-  readonly consumerErrorBackoff: Duration.Duration;
-  readonly rateLimitRetry: Duration.Duration;
-  readonly rateLimitTimeout: Duration.Duration;
-  readonly requestTimeout: Duration.Duration;
-}
+export class MessagingRuntimeConfig extends S.Class<MessagingRuntimeConfig>("MessagingRuntimeConfig")({
+  consumerReceiveTimeout: S.Duration,
+  consumerErrorBackoff: S.Duration,
+  rateLimitRetry: S.Duration,
+  rateLimitTimeout: S.Duration,
+  requestTimeout: S.Duration,
+}, {
+  description: "Messaging runtime timing windows for consumer receive, backoff, rate-limit retry, and request timeout.",
+}) {}
 
-export const defaultMessagingRuntimeConfig: MessagingRuntimeConfig = {
+export const defaultMessagingRuntimeConfig: MessagingRuntimeConfig = MessagingRuntimeConfig.make({
   consumerReceiveTimeout: Duration.millis(2_000),
   consumerErrorBackoff: Duration.millis(1_000),
   rateLimitRetry: Duration.millis(10_000),
   rateLimitTimeout: Duration.millis(7_200_000),
   requestTimeout: Duration.millis(300_000),
-};
+});
 
 const durationConfig = (name: string, defaultValue: Duration.Duration) =>
   Config.duration(name).pipe(
@@ -48,11 +51,11 @@ export const loadMessagingRuntimeConfig = Effect.fn("loadMessagingRuntimeConfig"
     defaultMessagingRuntimeConfig.requestTimeout,
   );
 
-  return {
+  return MessagingRuntimeConfig.make({
     consumerReceiveTimeout,
     consumerErrorBackoff,
     rateLimitRetry,
     rateLimitTimeout,
     requestTimeout,
-  } satisfies MessagingRuntimeConfig;
+  });
 });
diff --git a/ts/packages/cli/src/commands/util.ts b/ts/packages/cli/src/commands/util.ts
index f21243cc..f0a1deb3 100644
--- a/ts/packages/cli/src/commands/util.ts
+++ b/ts/packages/cli/src/commands/util.ts
@@ -16,12 +16,12 @@ import * as S from "effect/Schema";
 import * as Command from "effect/unstable/cli/Command";
 import * as Flag from "effect/unstable/cli/Flag";
 
-export interface CliOpts {
-  gateway: string;
-  user: string;
-  token?: string;
-  flow: string;
-}
+export class CliOpts extends S.Class<CliOpts>("CliOpts")({
+  gateway: S.String,
+  user: S.String,
+  token: S.optionalKey(S.String),
+  flow: S.String,
+}, { description: "Resolved TrustGraph CLI connection options." }) {}
 
 export const rootCommand = Command.make("tg").pipe(
   Command.withDescription("TrustGraph CLI - interact with TrustGraph services"),
diff --git a/ts/packages/flow/src/agent/react/service.ts b/ts/packages/flow/src/agent/react/service.ts
index 1d22e5fb..303fa60b 100644
--- a/ts/packages/flow/src/agent/react/service.ts
+++ b/ts/packages/flow/src/agent/react/service.ts
@@ -430,7 +430,7 @@ const onAgentRequest = Effect.fn("AgentService.onRequest")(function* (
             chunk_type: "explain",
             content: "",
             explain_id: explain.explainId,
-            explain_triples: explain.triples,
+            explain_triples: [...explain.triples],
           });
         }
 
diff --git a/ts/packages/flow/src/agent/react/tools.ts b/ts/packages/flow/src/agent/react/tools.ts
index 91290387..1c6fed65 100644
--- a/ts/packages/flow/src/agent/react/tools.ts
+++ b/ts/packages/flow/src/agent/react/tools.ts
@@ -15,10 +15,8 @@ import type {
   TriplesQueryResponse,
   ToolRequest,
   ToolResponse,
-  Term,
-  Triple,
 } from "@trustgraph/base";
-import {Term as TermSchema} from "@trustgraph/base";
+import { Term, Triple } from "@trustgraph/base";
 import { Effect, Match } from "effect";
 import * as O from "effect/Option";
 import * as Predicate from "effect/Predicate";
@@ -27,7 +25,7 @@ import type { AgentTool, ToolArg } from "./types.js";
 import { agentToolError, } from "./types.js";
 
 const decodeJsonUnknown = S.decodeUnknownOption(S.UnknownFromJsonString);
-const decodeTerm = S.decodeUnknownOption(TermSchema);
+const decodeTerm = S.decodeUnknownOption(Term);
 
 /**
  * Format a Term to a human-readable string.
@@ -64,10 +62,10 @@ function parseQuestion(input: string): string {
 /**
  * Explain data extracted from a graph-rag response.
  */
-export interface ExplainData {
-  explainId: string;
-  triples: Triple[];
-}
+export class ExplainData extends S.Class<ExplainData>("ExplainData")({
+  explainId: S.String,
+  triples: S.Array(Triple),
+}, { description: "Explain payload extracted from a graph-rag response: id plus supporting triples." }) {}
 
 /**
  * Query the knowledge graph for information about entities and their relationships.
diff --git a/ts/packages/flow/src/agent/react/types.ts b/ts/packages/flow/src/agent/react/types.ts
index 23daefbc..2fd26a62 100644
--- a/ts/packages/flow/src/agent/react/types.ts
+++ b/ts/packages/flow/src/agent/react/types.ts
@@ -20,11 +20,11 @@ export const agentToolError = (operation: string, cause: unknown): AgentToolErro
     message: errorMessage(cause),
   });
 
-export interface ToolArg {
-  name: string;
-  type: string;
-  description: string;
-}
+export class ToolArg extends S.Class<ToolArg>("ToolArg")({
+  name: S.String,
+  type: S.String,
+  description: S.String,
+}, { description: "A named, typed argument accepted by an agent tool." }) {}
 
 export interface AgentTool {
   name: string;
@@ -43,10 +43,10 @@ export type ReActState =
   | "final_answer"
   | "complete";
 
-export interface ParsedEvent {
-  type: "thought" | "action" | "action_input" | "final_answer";
-  content: string;
-}
+export class ParsedEvent extends S.Class<ParsedEvent>("ParsedEvent")({
+  type: S.Literals(["thought", "action", "action_input", "final_answer"]),
+  content: S.String,
+}, { description: "A parsed ReAct stream event with its section content." }) {}
 
 export type OnThought = (text: string, isFinal: boolean) => Effect.Effect<void, AgentToolError>;
 export type OnObservation = (text: string, isFinal: boolean) => Effect.Effect<void, AgentToolError>;
diff --git a/ts/packages/flow/src/librarian/collection-manager.ts b/ts/packages/flow/src/librarian/collection-manager.ts
index a00d82c5..e21d1362 100644
--- a/ts/packages/flow/src/librarian/collection-manager.ts
+++ b/ts/packages/flow/src/librarian/collection-manager.ts
@@ -8,14 +8,15 @@
 
 import * as MutableHashMap from "effect/MutableHashMap";
 import * as O from "effect/Option";
+import * as S from "effect/Schema";
 
-export interface CollectionEntry {
-  user: string;
-  collection: string;
-  name: string;
-  description: string;
-  tags: string[];
-}
+export class CollectionEntry extends S.Class<CollectionEntry>("CollectionEntry")({
+  user: S.String,
+  collection: S.String,
+  name: S.String,
+  description: S.String,
+  tags: S.Array(S.String),
+}, { description: "A librarian collection registration with its metadata tags." }) {}
 
 export interface CollectionManager {
   readonly listCollections: (user: string) => CollectionEntry[];
diff --git a/ts/packages/flow/src/model/text-completion/common.ts b/ts/packages/flow/src/model/text-completion/common.ts
index 1ae39541..0bc23527 100644
--- a/ts/packages/flow/src/model/text-completion/common.ts
+++ b/ts/packages/flow/src/model/text-completion/common.ts
@@ -39,10 +39,10 @@ export type TextCompletionRuntimeError =
   | TextCompletionProviderError
   | TooManyRequestsError;
 
-export interface LanguageModelProviderRequest {
-  readonly model: string;
-  readonly temperature: number;
-}
+export class LanguageModelProviderRequest extends S.Class<LanguageModelProviderRequest>("LanguageModelProviderRequest")({
+  model: S.String,
+  temperature: S.Finite,
+}, { description: "Resolved model id and temperature for a language-model call." }) {}
 
 export interface LanguageModelProviderOptions<Requirements> {
   readonly provider: string;
diff --git a/ts/packages/flow/src/prompt/template.ts b/ts/packages/flow/src/prompt/template.ts
index 063083dd..e439a2b5 100644
--- a/ts/packages/flow/src/prompt/template.ts
+++ b/ts/packages/flow/src/prompt/template.ts
@@ -47,10 +47,10 @@ import * as MutableHashMap from "effect/MutableHashMap";
 import * as O from "effect/Option";
 import * as S from "effect/Schema";
 
-export interface PromptTemplate {
-  system: string;
-  prompt: string;
-}
+export class PromptTemplate extends S.Class<PromptTemplate>("PromptTemplate")({
+  system: S.String,
+  prompt: S.String,
+}, { description: "A prompt template: system preamble plus prompt body." }) {}
 
 export interface PromptTemplateConfig extends ProcessorConfig {
   configKey?: string;
diff --git a/ts/packages/flow/src/qdrant/client.ts b/ts/packages/flow/src/qdrant/client.ts
index e418bf34..1835ea49 100644
--- a/ts/packages/flow/src/qdrant/client.ts
+++ b/ts/packages/flow/src/qdrant/client.ts
@@ -4,22 +4,22 @@ import { errorMessage } from "@trustgraph/base";
 import { Effect } from "effect";
 import * as S from "effect/Schema";
 
-export interface QdrantCollectionStatus {
-  readonly exists: boolean;
-}
+export class QdrantCollectionStatus extends S.Class<QdrantCollectionStatus>("QdrantCollectionStatus")({
+  exists: S.Boolean,
+}, { description: "Qdrant collection existence probe result." }) {}
 
-export interface QdrantCollectionDescription {
-  readonly name: string;
-}
+export class QdrantCollectionDescription extends S.Class<QdrantCollectionDescription>("QdrantCollectionDescription")({
+  name: S.String,
+}, { description: "A named Qdrant collection." }) {}
 
-export interface QdrantCollections {
-  readonly collections: ReadonlyArray<QdrantCollectionDescription>;
-}
+export class QdrantCollections extends S.Class<QdrantCollections>("QdrantCollections")({
+  collections: S.Array(QdrantCollectionDescription),
+}, { description: "Qdrant collection listing." }) {}
 
-export interface QdrantScoredPoint {
-  readonly score: number;
-  readonly payload?: unknown;
-}
+export class QdrantScoredPoint extends S.Class<QdrantScoredPoint>("QdrantScoredPoint")({
+  score: S.Finite,
+  payload: S.optionalKey(S.Unknown),
+}, { description: "A scored Qdrant search hit with optional payload." }) {}
 
 export class QdrantClientError extends S.TaggedErrorClass<QdrantClientError>()("QdrantClientError", {
   message: S.String,
diff --git a/ts/packages/flow/src/query/embeddings/qdrant-doc.ts b/ts/packages/flow/src/query/embeddings/qdrant-doc.ts
index b988fbb4..a86052ec 100644
--- a/ts/packages/flow/src/query/embeddings/qdrant-doc.ts
+++ b/ts/packages/flow/src/query/embeddings/qdrant-doc.ts
@@ -20,18 +20,18 @@ export interface QdrantDocQueryConfig {
   clientFactory?: QdrantClientFactory;
 }
 
-export interface ChunkMatch {
-  chunkId: string;
-  score: number;
-  content?: string;
-}
+export class ChunkMatch extends S.Class<ChunkMatch>("ChunkMatch")({
+  chunkId: S.String,
+  score: S.Finite,
+  content: S.optionalKey(S.String),
+}, { description: "A scored document-chunk match from embeddings query." }) {}
 
-export interface DocEmbeddingsQueryRequest {
-  vector: number[];
-  user: string;
-  collection: string;
-  limit: number;
-}
+export class DocEmbeddingsQueryRequest extends S.Class<DocEmbeddingsQueryRequest>("DocEmbeddingsQueryRequest")({
+  vector: S.Array(S.Finite),
+  user: S.String,
+  collection: S.String,
+  limit: S.Finite,
+}, { description: "Document embeddings similarity query request." }) {}
 
 export class QdrantDocEmbeddingsQueryError extends S.TaggedErrorClass<QdrantDocEmbeddingsQueryError>()(
   "QdrantDocEmbeddingsQueryError",
diff --git a/ts/packages/flow/src/query/embeddings/qdrant-graph.ts b/ts/packages/flow/src/query/embeddings/qdrant-graph.ts
index 1e70691c..c94b1e14 100644
--- a/ts/packages/flow/src/query/embeddings/qdrant-graph.ts
+++ b/ts/packages/flow/src/query/embeddings/qdrant-graph.ts
@@ -10,8 +10,7 @@
  * Python reference: trustgraph-flow/trustgraph/query/graph_embeddings/qdrant/service.py
  */
 
-import type { Term } from "@trustgraph/base";
-import { errorMessage, } from "@trustgraph/base";
+import { Term, errorMessage } from "@trustgraph/base";
 import { Config, Context, Effect, Layer } from "effect";
 import * as O from "effect/Option";
 import * as S from "effect/Schema";
@@ -24,17 +23,17 @@ export interface QdrantGraphQueryConfig {
   clientFactory?: QdrantClientFactory;
 }
 
-export interface EntityMatch {
-  entity: Term;
-  score: number;
-}
+export class EntityMatch extends S.Class<EntityMatch>("EntityMatch")({
+  entity: Term,
+  score: S.Finite,
+}, { description: "A scored graph-entity match from embeddings query." }) {}
 
-export interface GraphEmbeddingsQueryRequest {
-  vector: number[];
-  user: string;
-  collection: string;
-  limit: number;
-}
+export class GraphEmbeddingsQueryRequest extends S.Class<GraphEmbeddingsQueryRequest>("GraphEmbeddingsQueryRequest")({
+  vector: S.Array(S.Finite),
+  user: S.String,
+  collection: S.String,
+  limit: S.Finite,
+}, { description: "Graph embeddings similarity query request." }) {}
 
 export class QdrantGraphEmbeddingsQueryError extends S.TaggedErrorClass<QdrantGraphEmbeddingsQueryError>()(
   "QdrantGraphEmbeddingsQueryError",
diff --git a/ts/packages/flow/src/retrieval/graph-rag-service.ts b/ts/packages/flow/src/retrieval/graph-rag-service.ts
index e0e7230e..80ab1772 100644
--- a/ts/packages/flow/src/retrieval/graph-rag-service.ts
+++ b/ts/packages/flow/src/retrieval/graph-rag-service.ts
@@ -138,7 +138,7 @@ const onGraphRagRequest = Effect.fn("GraphRagService.onRequest")(function* (
         endOfStream: true,
         message_type: "explain",
         explain_id: `explain-${requestId}`,
-        explain_triples: result.subgraph,
+        explain_triples: [...result.subgraph],
       };
 
   yield* producer.send(requestId, response);
diff --git a/ts/packages/flow/src/retrieval/graph-rag.ts b/ts/packages/flow/src/retrieval/graph-rag.ts
index 8471d952..823c9e1e 100644
--- a/ts/packages/flow/src/retrieval/graph-rag.ts
+++ b/ts/packages/flow/src/retrieval/graph-rag.ts
@@ -16,23 +16,22 @@ import type {
   Term,
   TextCompletionRequest,
   TextCompletionResponse,
-  Triple,
   TriplesQueryRequest,
   TriplesQueryResponse,
 } from "@trustgraph/base";
-import { errorMessage } from "@trustgraph/base";
+import { Triple, errorMessage } from "@trustgraph/base";
 import { Context, Effect, Layer, Match } from "effect";
 import * as O from "effect/Option";
 import * as S from "effect/Schema";
 
-export interface GraphRagConfig {
-  entityLimit?: number;
-  tripleLimit?: number;
-  maxSubgraphSize?: number;
-  maxPathLength?: number;
-  edgeScoreLimit?: number;
-  edgeLimit?: number;
-}
+export class GraphRagConfig extends S.Class<GraphRagConfig>("GraphRagConfig")({
+  entityLimit: S.optionalKey(S.Finite),
+  tripleLimit: S.optionalKey(S.Finite),
+  maxSubgraphSize: S.optionalKey(S.Finite),
+  maxPathLength: S.optionalKey(S.Finite),
+  edgeScoreLimit: S.optionalKey(S.Finite),
+  edgeLimit: S.optionalKey(S.Finite),
+}, { description: "Graph RAG retrieval tuning limits." }) {}
 
 export interface GraphRagClients {
   llm: EffectRequestResponse<TextCompletionRequest, TextCompletionResponse>;
@@ -53,10 +52,10 @@ export interface GraphRagQueryOptions {
   readonly chunkCallback?: ChunkCallback;
 }
 
-export interface GraphRagResult {
-  answer: string;
-  subgraph: Triple[];
-}
+export class GraphRagResult extends S.Class<GraphRagResult>("GraphRagResult")({
+  answer: S.String,
+  subgraph: S.Array(Triple),
+}, { description: "Graph RAG answer with the supporting subgraph." }) {}
 
 interface NormalizedGraphRagConfig {
   entityLimit: number;
diff --git a/ts/packages/flow/src/storage/embeddings/qdrant-doc.ts b/ts/packages/flow/src/storage/embeddings/qdrant-doc.ts
index 637f72d1..7e2004eb 100644
--- a/ts/packages/flow/src/storage/embeddings/qdrant-doc.ts
+++ b/ts/packages/flow/src/storage/embeddings/qdrant-doc.ts
@@ -22,17 +22,17 @@ export interface QdrantDocEmbeddingsConfig {
   clientFactory?: QdrantClientFactory;
 }
 
-export interface DocEmbeddingChunk {
-  chunkId: string;
-  vector: number[];
-  content?: string;
-}
+export class DocEmbeddingChunk extends S.Class<DocEmbeddingChunk>("DocEmbeddingChunk")({
+  chunkId: S.String,
+  vector: S.Array(S.Finite),
+  content: S.optionalKey(S.String),
+}, { description: "A document chunk paired with its embedding vector." }) {}
 
-export interface DocEmbeddingsMessage {
-  user: string;
-  collection: string;
-  chunks: DocEmbeddingChunk[];
-}
+export class DocEmbeddingsMessage extends S.Class<DocEmbeddingsMessage>("DocEmbeddingsMessage")({
+  user: S.String,
+  collection: S.String,
+  chunks: S.Array(DocEmbeddingChunk),
+}, { description: "Document embeddings store message: chunks to upsert for a user collection." }) {}
 
 export class QdrantDocEmbeddingsStoreError extends S.TaggedErrorClass<QdrantDocEmbeddingsStoreError>()(
   "QdrantDocEmbeddingsStoreError",
diff --git a/ts/packages/flow/src/storage/embeddings/qdrant-graph.ts b/ts/packages/flow/src/storage/embeddings/qdrant-graph.ts
index 23e2ca9a..aef79a04 100644
--- a/ts/packages/flow/src/storage/embeddings/qdrant-graph.ts
+++ b/ts/packages/flow/src/storage/embeddings/qdrant-graph.ts
@@ -8,8 +8,7 @@
  * Python reference: trustgraph-flow/trustgraph/storage/graph_embeddings/qdrant/write.py
  */
 
-import type { Term } from "@trustgraph/base";
-import { errorMessage, } from "@trustgraph/base";
+import { Term, errorMessage } from "@trustgraph/base";
 import { Config, Context, Effect, Layer, Match, Random } from "effect";
 import * as MutableHashSet from "effect/MutableHashSet";
 import * as O from "effect/Option";
@@ -23,17 +22,17 @@ export interface QdrantGraphEmbeddingsConfig {
   clientFactory?: QdrantClientFactory;
 }
 
-export interface GraphEmbeddingEntity {
-  entity: Term;
-  vector: number[];
-  chunkId?: string;
-}
+export class GraphEmbeddingEntity extends S.Class<GraphEmbeddingEntity>("GraphEmbeddingEntity")({
+  entity: Term,
+  vector: S.Array(S.Finite),
+  chunkId: S.optionalKey(S.String),
+}, { description: "A graph entity paired with its embedding vector." }) {}
 
-export interface GraphEmbeddingsMessage {
-  user: string;
-  collection: string;
-  entities: GraphEmbeddingEntity[];
-}
+export class GraphEmbeddingsMessage extends S.Class<GraphEmbeddingsMessage>("GraphEmbeddingsMessage")({
+  user: S.String,
+  collection: S.String,
+  entities: S.Array(GraphEmbeddingEntity),
+}, { description: "Graph embeddings store message: entities to upsert for a user collection." }) {}
 
 export class QdrantGraphEmbeddingsStoreError extends S.TaggedErrorClass<QdrantGraphEmbeddingsStoreError>()(
   "QdrantGraphEmbeddingsStoreError",
diff --git a/ts/packages/mcp/src/server-effect.ts b/ts/packages/mcp/src/server-effect.ts
index a45eb53d..47f3043b 100644
--- a/ts/packages/mcp/src/server-effect.ts
+++ b/ts/packages/mcp/src/server-effect.ts
@@ -1217,16 +1217,18 @@ export interface TrustGraphMcpOptions {
   readonly port?: number | undefined
 }
 
-export interface TrustGraphMcpConfigShape {
-  readonly gatewayUrl: string
-  readonly user: string
-  readonly token: string | undefined
-  readonly flowId: string
-  readonly name: string
-  readonly version: string
-  readonly mcpPath: HttpRouter.PathInput
-  readonly port: number
-}
+const McpPathInput = S.Union([S.Literal("*"), S.TemplateLiteral(["/", S.String])])
+
+export class TrustGraphMcpConfigShape extends S.Class<TrustGraphMcpConfigShape>("TrustGraphMcpConfigShape")({
+  gatewayUrl: S.String,
+  user: S.String,
+  token: S.UndefinedOr(S.String),
+  flowId: S.String,
+  name: S.String,
+  version: S.String,
+  mcpPath: McpPathInput,
+  port: S.Finite,
+}, { description: "Resolved TrustGraph MCP server configuration." }) {}
 
 const readNonEmpty = (value: string | undefined): string | undefined =>
   value !== undefined && value.length > 0 ? value : undefined
diff --git a/ts/packages/workbench/src/atoms/workbench.ts b/ts/packages/workbench/src/atoms/workbench.ts
index fb40752c..b5f58a7d 100644
--- a/ts/packages/workbench/src/atoms/workbench.ts
+++ b/ts/packages/workbench/src/atoms/workbench.ts
@@ -71,6 +71,44 @@ type WorkbenchError = WorkbenchPromiseError;
 
 const isWorkbenchPromiseError = S.is(WorkbenchPromiseError);
 
+const ClientTriple: S.Codec<Triple, Triple> = S.suspend(() =>
+  S.Struct({
+    s: ClientTerm,
+    p: ClientTerm,
+    o: ClientTerm,
+    g: S.optionalKey(S.String),
+  })
+);
+
+const ClientTerm: S.Codec<Term, Term> = S.suspend(() =>
+  S.Union([
+    S.Struct({
+      t: S.Literal("i"),
+      i: S.String,
+    }),
+    S.Struct({
+      t: S.Literal("b"),
+      d: S.String,
+    }),
+    S.Struct({
+      t: S.Literal("l"),
+      v: S.String,
+      dt: S.optionalKey(S.String),
+      ln: S.optionalKey(S.String),
+    }),
+    S.Struct({
+      t: S.Literal("t"),
+      tr: S.optionalKey(ClientTriple),
+    }),
+  ])
+);
+
+const ClientExplainEvent: S.Codec<ExplainEvent, ExplainEvent> = S.Struct({
+  explainId: S.String,
+  explainGraph: S.String,
+  explainTriples: S.optionalKey(S.Array(ClientTriple).pipe(S.mutable)),
+});
+
 function errorMessage(error: unknown): string {
   if (isWorkbenchPromiseError(error)) return error.message;
   if (Predicate.isObject(error) && Predicate.hasProperty(error, "message")) {
@@ -146,25 +184,25 @@ const mutationCounter = Metric.counter("trustgraph_workbench_mutation_total", {
 // Shared types
 // ---------------------------------------------------------------------------
 
-export interface FeatureSwitches {
-  flowClasses: boolean;
-  submissions: boolean;
-  tokenCost: boolean;
-  schemas: boolean;
-  structuredQuery: boolean;
-  ontologyEditor: boolean;
-  agentTools: boolean;
-  mcpTools: boolean;
-  llmModels: boolean;
-}
+export class FeatureSwitches extends S.Class<FeatureSwitches>("FeatureSwitches")({
+  flowClasses: S.Boolean,
+  submissions: S.Boolean,
+  tokenCost: S.Boolean,
+  schemas: S.Boolean,
+  structuredQuery: S.Boolean,
+  ontologyEditor: S.Boolean,
+  agentTools: S.Boolean,
+  mcpTools: S.Boolean,
+  llmModels: S.Boolean,
+}, { description: "Workbench feature visibility switches." }) {}
 
-export interface Settings {
-  user: string;
-  apiKey: string;
-  collection: string;
-  gatewayUrl: string;
-  featureSwitches: FeatureSwitches;
-}
+export class Settings extends S.Class<Settings>("Settings")({
+  user: S.String,
+  apiKey: S.String,
+  collection: S.String,
+  gatewayUrl: S.String,
+  featureSwitches: FeatureSwitches,
+}, { description: "Persisted workbench connection and display settings." }) {}
 
 export interface WorkbenchApiFactory {
   readonly create: (settings: Settings) => BaseApi;
@@ -176,31 +214,31 @@ export type ChatMode = "graph-rag" | "document-rag" | "agent";
 export type MessageRole = "user" | "assistant" | "system";
 export type AgentPhase = "think" | "observe" | "answer";
 
-export interface ChatMessage {
-  id: string;
-  role: MessageRole;
-  content: string;
-  timestamp: number;
-  isStreaming?: boolean;
-  metadata?: {
-    model?: string;
-    inTokens?: number;
-    outTokens?: number;
-  };
-  agentPhases?: {
-    think: string;
-    observe: string;
-    answer: string;
-  };
-  activePhase?: AgentPhase;
-  explainEvents?: ExplainEvent[];
-}
+export class ChatMessage extends S.Class<ChatMessage>("ChatMessage")({
+  id: S.String,
+  role: S.Literals(["user", "assistant", "system"]),
+  content: S.String,
+  timestamp: S.Finite,
+  isStreaming: S.optionalKey(S.Boolean),
+  metadata: S.optionalKey(S.Struct({
+    model: S.optionalKey(S.String),
+    inTokens: S.optionalKey(S.Finite),
+    outTokens: S.optionalKey(S.Finite),
+  })),
+  agentPhases: S.optionalKey(S.Struct({
+    think: S.String,
+    observe: S.String,
+    answer: S.String,
+  })),
+  activePhase: S.optionalKey(S.Literals(["think", "observe", "answer"])),
+  explainEvents: S.optionalKey(S.Array(ClientExplainEvent).pipe(S.mutable)),
+}, { description: "A rendered chat transcript message." }) {}
 
-export interface ConversationState {
-  messages: ChatMessage[];
-  input: string;
-  chatMode: ChatMode;
-}
+export class ConversationState extends S.Class<ConversationState>("ConversationState")({
+  messages: S.Array(ChatMessage).pipe(S.mutable),
+  input: S.String,
+  chatMode: S.Literals(["graph-rag", "document-rag", "agent"]),
+}, { description: "Persisted workbench chat state." }) {}
 
 export interface FlowSummary {
   id: string;
@@ -216,60 +254,60 @@ export interface ProcessingMetadata {
   [key: string]: unknown;
 }
 
-export interface UploadProgress {
-  phase: "preparing" | "uploading" | "finalizing";
-  chunksTotal: number;
-  chunksUploaded: number;
-  bytesTotal: number;
-  bytesUploaded: number;
-}
+export class UploadProgress extends S.Class<UploadProgress>("UploadProgress")({
+  phase: S.Literals(["preparing", "uploading", "finalizing"]),
+  chunksTotal: S.Finite,
+  chunksUploaded: S.Finite,
+  bytesTotal: S.Finite,
+  bytesUploaded: S.Finite,
+}, { description: "Current chunked document upload progress." }) {}
 
-export interface UploadForm {
-  file: File | null;
-  title: string;
-  tags: string;
-  comments: string;
-  uploading: boolean;
-  dragOver: boolean;
-  progress: UploadProgress | null;
-}
+export class UploadForm extends S.Class<UploadForm>("UploadForm")({
+  file: S.NullOr(S.File),
+  title: S.String,
+  tags: S.String,
+  comments: S.String,
+  uploading: S.Boolean,
+  dragOver: S.Boolean,
+  progress: S.NullOr(UploadProgress),
+}, { description: "Workbench document upload form state." }) {}
 
-export interface McpServerConfig {
-  url: string;
-  "remote-name"?: string;
-  "auth-token"?: string;
-}
+export class McpServerConfig extends S.Class<McpServerConfig>("McpServerConfig")({
+  url: S.String,
+  "remote-name": S.optionalKey(S.String),
+  "auth-token": S.optionalKey(S.String),
+}, { description: "Workbench MCP server config entry payload." }) {}
 
-export interface McpServerEntry {
-  key: string;
-  config: McpServerConfig;
-}
+export class McpServerEntry extends S.Class<McpServerEntry>("McpServerEntry")({
+  key: S.String,
+  config: McpServerConfig,
+}, { description: "Workbench MCP server config entry." }) {}
 
-export interface ToolArgument {
-  name: string;
-  type: string;
-  description: string;
-}
+export class ToolArgument extends S.Class<ToolArgument>("ToolArgument")({
+  name: S.String,
+  type: S.String,
+  description: S.String,
+}, { description: "Workbench MCP tool argument descriptor." }) {}
 
-export interface ToolConfig {
-  type: string;
-  name: string;
-  description: string;
-  "mcp-tool"?: string;
-  group?: string[];
-  arguments?: ToolArgument[];
-}
+export class ToolConfig extends S.Class<ToolConfig>("ToolConfig")({
+  type: S.String,
+  name: S.String,
+  description: S.String,
+  "mcp-tool": S.optionalKey(S.String),
+  group: S.optionalKey(S.Array(S.String).pipe(S.mutable)),
+  arguments: S.optionalKey(S.Array(ToolArgument).pipe(S.mutable)),
+}, { description: "Workbench tool config entry payload." }) {}
 
-export interface ToolEntry {
-  key: string;
-  config: ToolConfig;
-}
+export class ToolEntry extends S.Class<ToolEntry>("ToolEntry")({
+  key: S.String,
+  config: ToolConfig,
+}, { description: "Workbench tool config entry." }) {}
 
-export interface TokenCost {
-  model: string;
-  input_price: number;
-  output_price: number;
-}
+export class TokenCost extends S.Class<TokenCost>("TokenCost")({
+  model: S.String,
+  input_price: S.Finite,
+  output_price: S.Finite,
+}, { description: "Model token pricing row." }) {}
 
 export interface CollectionSummary {
   id?: string;
@@ -280,61 +318,61 @@ export interface CollectionSummary {
   [key: string]: unknown;
 }
 
-export interface Notification {
-  id: string;
-  type: "success" | "error" | "warning" | "info";
-  title: string;
-  description?: string;
-}
+export class Notification extends S.Class<Notification>("Notification")({
+  id: S.String,
+  type: S.Literals(["success", "error", "warning", "info"]),
+  title: S.String,
+  description: S.optionalKey(S.String),
+}, { description: "Transient workbench notification toast." }) {}
 
-export interface McpServerForm {
-  key: string;
-  url: string;
-  remoteName: string;
-  authToken: string;
-  showToken: boolean;
-  saving: boolean;
-  keyError: string;
-}
+export class McpServerForm extends S.Class<McpServerForm>("McpServerForm")({
+  key: S.String,
+  url: S.String,
+  remoteName: S.String,
+  authToken: S.String,
+  showToken: S.Boolean,
+  saving: S.Boolean,
+  keyError: S.String,
+}, { description: "Editable MCP server dialog state." }) {}
 
-export interface McpToolForm {
-  key: string;
-  name: string;
-  description: string;
-  mcpTool: string;
-  group: string;
-  args: ToolArgument[];
-  saving: boolean;
-  keyError: string;
-}
+export class McpToolForm extends S.Class<McpToolForm>("McpToolForm")({
+  key: S.String,
+  name: S.String,
+  description: S.String,
+  mcpTool: S.String,
+  group: S.String,
+  args: S.Array(ToolArgument).pipe(S.mutable),
+  saving: S.Boolean,
+  keyError: S.String,
+}, { description: "Editable MCP tool dialog state." }) {}
 
-export interface StartFlowForm {
-  id: string;
-  blueprint: string;
-  description: string;
-  paramsJson: string;
-  submitting: boolean;
-  paramsError: string | null;
-  submitted: boolean;
-  definitionExpanded: boolean;
-}
+export class StartFlowForm extends S.Class<StartFlowForm>("StartFlowForm")({
+  id: S.String,
+  blueprint: S.String,
+  description: S.String,
+  paramsJson: S.String,
+  submitting: S.Boolean,
+  paramsError: S.NullOr(S.String),
+  submitted: S.Boolean,
+  definitionExpanded: S.Boolean,
+}, { description: "Start-flow dialog form state." }) {}
 
-export interface CollectionForm {
-  id: string;
-  name: string;
-  description: string;
-  tags: string;
-  submitting: boolean;
-}
+export class CollectionForm extends S.Class<CollectionForm>("CollectionForm")({
+  id: S.String,
+  name: S.String,
+  description: S.String,
+  tags: S.String,
+  submitting: S.Boolean,
+}, { description: "Collection creation form state." }) {}
 
-export interface GraphViewState {
-  searchTerm: string;
-  selectedNodeId: string | null;
-  selectedNodeLabel: string | null;
-  showLabels: boolean;
-  showTypes: boolean;
-  nodeLimit: number;
-}
+export class GraphViewState extends S.Class<GraphViewState>("GraphViewState")({
+  searchTerm: S.String,
+  selectedNodeId: S.NullOr(S.String),
+  selectedNodeLabel: S.NullOr(S.String),
+  showLabels: S.Boolean,
+  showTypes: S.Boolean,
+  nodeLimit: S.Finite,
+}, { description: "Workbench graph display controls." }) {}
 
 const DEFAULT_FEATURE_SWITCHES: FeatureSwitches = {
   flowClasses: false,
@@ -356,50 +394,6 @@ export const DEFAULT_SETTINGS: Settings = {
   featureSwitches: DEFAULT_FEATURE_SWITCHES,
 };
 
-const SettingsSchema = S.Struct({
-  user: S.String,
-  apiKey: S.String,
-  collection: S.String,
-  gatewayUrl: S.String,
-  featureSwitches: S.Struct({
-    flowClasses: S.Boolean,
-    submissions: S.Boolean,
-    tokenCost: S.Boolean,
-    schemas: S.Boolean,
-    structuredQuery: S.Boolean,
-    ontologyEditor: S.Boolean,
-    agentTools: S.Boolean,
-    mcpTools: S.Boolean,
-    llmModels: S.Boolean,
-  }),
-});
-
-const ChatMessageSchema = S.Struct({
-  id: S.String,
-  role: S.Union([S.Literal("user"), S.Literal("assistant"), S.Literal("system")]),
-  content: S.String,
-  timestamp: S.Finite,
-  isStreaming: S.optionalKey(S.Boolean),
-  metadata: S.optionalKey(S.Struct({
-    model: S.optionalKey(S.String),
-    inTokens: S.optionalKey(S.Finite),
-    outTokens: S.optionalKey(S.Finite),
-  })),
-  agentPhases: S.optionalKey(S.Struct({
-    think: S.String,
-    observe: S.String,
-    answer: S.String,
-  })),
-  activePhase: S.optionalKey(S.Union([S.Literal("think"), S.Literal("observe"), S.Literal("answer")])),
-  explainEvents: S.optionalKey(S.Array(S.Unknown)),
-});
-
-const ConversationSchema = S.Struct({
-  messages: S.Array(ChatMessageSchema),
-  input: S.String,
-  chatMode: S.Union([S.Literal("graph-rag"), S.Literal("document-rag"), S.Literal("agent")]),
-});
-
 const ThemeSchema = S.Union([S.Literal("dark"), S.Literal("light")]);
 const FlowIdSchema = S.String;
 
@@ -523,11 +517,14 @@ const randomId = Effect.fn("trustgraph.workbench.randomId")(function*(prefix: st
 
 function metadataFrom(metadata: StreamingMetadata | undefined): ChatMessage["metadata"] | undefined {
   if (metadata === undefined) return undefined;
-  const result: NonNullable<ChatMessage["metadata"]> = {};
-  if (metadata.model !== undefined) result.model = metadata.model;
-  if (metadata.in_token !== undefined) result.inTokens = metadata.in_token;
-  if (metadata.out_token !== undefined) result.outTokens = metadata.out_token;
-  return Object.keys(result).length > 0 ? result : undefined;
+  if (metadata.model === undefined && metadata.in_token === undefined && metadata.out_token === undefined) {
+    return undefined;
+  }
+  return {
+    ...(metadata.model !== undefined ? { model: metadata.model } : {}),
+    ...(metadata.in_token !== undefined ? { inTokens: metadata.in_token } : {}),
+    ...(metadata.out_token !== undefined ? { outTokens: metadata.out_token } : {}),
+  };
 }
 
 function withoutActivePhase(message: ChatMessage): ChatMessage {
@@ -609,40 +606,8 @@ const StreamingEnvelopeSchema = S.Struct({
 });
 type StreamingEnvelope = typeof StreamingEnvelopeSchema.Type;
 
-const ClientTripleSchema: S.Codec<Triple, Triple> = S.suspend(() =>
-  S.Struct({
-    s: ClientTermSchema,
-    p: ClientTermSchema,
-    o: ClientTermSchema,
-    g: S.optionalKey(S.String),
-  })
-);
-
-const ClientTermSchema: S.Codec<Term, Term> = S.suspend(() =>
-  S.Union([
-    S.Struct({
-      t: S.Literal("i"),
-      i: S.String,
-    }),
-    S.Struct({
-      t: S.Literal("b"),
-      d: S.String,
-    }),
-    S.Struct({
-      t: S.Literal("l"),
-      v: S.String,
-      dt: S.optionalKey(S.String),
-      ln: S.optionalKey(S.String),
-    }),
-    S.Struct({
-      t: S.Literal("t"),
-      tr: S.optionalKey(ClientTripleSchema),
-    }),
-  ])
-);
-
 const decodeStreamingEnvelope = S.decodeUnknownOption(StreamingEnvelopeSchema);
-const decodeClientTriples = S.decodeUnknownOption(S.Array(ClientTripleSchema).pipe(S.mutable));
+const decodeClientTriples = S.decodeUnknownOption(S.Array(ClientTriple).pipe(S.mutable));
 
 function gatewayHttpBaseUrl(settings: Settings): string {
   const raw = settings.gatewayUrl.trim();
@@ -1532,7 +1497,7 @@ function withActivity<A, R>(
 export const settingsAtom = Atom.kvs({
   runtime: workbenchRuntime,
   key: "trustgraph-workbench-settings-v1",
-  schema: S.toCodecJson(SettingsSchema),
+  schema: S.toCodecJson(Settings),
   defaultValue: legacySettings,
 }).pipe(Atom.keepAlive) as Atom.Writable<Settings, Settings>;
 
@@ -1553,7 +1518,7 @@ export const flowIdAtom = Atom.kvs({
 export const conversationAtom = Atom.kvs({
   runtime: workbenchRuntime,
   key: "trustgraph-workbench-conversation-v1",
-  schema: S.toCodecJson(ConversationSchema),
+  schema: S.toCodecJson(ConversationState),
   defaultValue: legacyConversation,
 }).pipe(Atom.keepAlive) as unknown as Atom.Writable<ConversationState, ConversationState>;
 
@@ -1855,17 +1820,17 @@ export const collectionsAtom = queryAtom(
   { reactivityKeys: ["collections"] },
 ).pipe(Atom.setIdleTTL("2 minutes"));
 
-export interface GraphTriplesInput {
-  readonly flowId: string;
-  readonly collection: string;
-  readonly limit: number;
-}
+export class GraphTriplesInput extends S.Class<GraphTriplesInput>("GraphTriplesInput")({
+  flowId: S.String,
+  collection: S.String,
+  limit: S.Finite,
+}, { description: "Workbench graph triples query atom input." }) {}
 
-export interface ExplainTriplesInput {
-  readonly events: ExplainEvent[];
-  readonly flowId: string;
-  readonly collection: string;
-}
+export class ExplainTriplesInput extends S.Class<ExplainTriplesInput>("ExplainTriplesInput")({
+  events: S.Array(ClientExplainEvent).pipe(S.mutable),
+  flowId: S.String,
+  collection: S.String,
+}, { description: "Workbench explain triples query atom input." }) {}
 
 const atomFamilyKeySeparator = "\u001f";
 const explainGraphSeparator = "\u001e";
@@ -2139,13 +2104,13 @@ export const deleteMcpToolAtom = commandAtom<string, void>("deleteMcpTool", Effe
 
 const chunkedUploadThreshold = 1_000_000;
 
-export interface UploadDocumentInput {
-  readonly base64: string;
-  readonly mimeType: string;
-  readonly title: string;
-  readonly comments: string;
-  readonly tags: string[];
-}
+export class UploadDocumentInput extends S.Class<UploadDocumentInput>("UploadDocumentInput")({
+  base64: S.String,
+  mimeType: S.String,
+  title: S.String,
+  comments: S.String,
+  tags: S.Array(S.String).pipe(S.mutable),
+}, { description: "Workbench document upload command payload." }) {}
 
 const uploadDocumentEffect = Effect.fn("trustgraph.workbench.uploadDocument.effect")(function*(
   input: UploadDocumentInput,
diff --git a/ts/packages/workbench/src/lib/graph-utils.ts b/ts/packages/workbench/src/lib/graph-utils.ts
index c5494ad9..57bdf4e8 100644
--- a/ts/packages/workbench/src/lib/graph-utils.ts
+++ b/ts/packages/workbench/src/lib/graph-utils.ts
@@ -1,5 +1,6 @@
 import type { Triple, Term } from "@trustgraph/client";
 import { Match } from "effect";
+import * as S from "effect/Schema";
 import type { ForceGraphProps, NodeObject, LinkObject } from "react-force-graph-2d";
 
 // ---------------------------------------------------------------------------
@@ -27,10 +28,23 @@ export interface GraphLink extends LinkObject {
   label: string;
 }
 
-export interface GraphData {
-  nodes: GraphNode[];
-  links: GraphLink[];
-}
+const GraphNodeValue: S.Codec<GraphNode, GraphNode> = S.Struct({
+  id: S.String,
+  label: S.String,
+  color: S.optionalKey(S.String),
+  degree: S.Finite,
+});
+
+const GraphLinkValue: S.Codec<GraphLink, GraphLink> = S.Struct({
+  source: S.String,
+  target: S.String,
+  label: S.String,
+});
+
+export class GraphData extends S.Class<GraphData>("GraphData")({
+  nodes: S.Array(GraphNodeValue).pipe(S.mutable),
+  links: S.Array(GraphLinkValue).pipe(S.mutable),
+}, { description: "Renderable graph nodes and links derived from triples." }) {}
 
 export const DEFAULT_GRAPH_NODE_COLOR = "#82b582";
 
diff --git a/ts/packages/workbench/src/qa/initial-values.ts b/ts/packages/workbench/src/qa/initial-values.ts
index ce99b489..8d0aabe6 100644
--- a/ts/packages/workbench/src/qa/initial-values.ts
+++ b/ts/packages/workbench/src/qa/initial-values.ts
@@ -11,14 +11,14 @@ import {
   settingsAtom,
 } from "@/atoms/workbench";
 import type { BaseApi } from "@trustgraph/client";
-import type { MockWorkbenchFixture } from "@/qa/mock-api";
-import { makeMockBaseApi, qaSettingsFromFixture, } from "@/qa/mock-api";
+import { MockWorkbenchFixture, makeMockBaseApi, qaSettingsFromFixture, } from "@/qa/mock-api";
+import { Schema as S } from "effect";
 
-export interface WorkbenchQaWindowConfig {
-  readonly enabled?: boolean;
-  readonly fixture?: MockWorkbenchFixture;
-  readonly flowId?: string;
-}
+export class WorkbenchQaWindowConfig extends S.Class<WorkbenchQaWindowConfig>("WorkbenchQaWindowConfig")({
+  enabled: S.optionalKey(S.Boolean),
+  fixture: S.optionalKey(MockWorkbenchFixture),
+  flowId: S.optionalKey(S.String),
+}, { description: "Browser-provided workbench QA boot configuration." }) {}
 
 declare global {
   interface Window {
diff --git a/ts/packages/workbench/src/qa/mock-api.ts b/ts/packages/workbench/src/qa/mock-api.ts
index 05c8a299..75c8d9b0 100644
--- a/ts/packages/workbench/src/qa/mock-api.ts
+++ b/ts/packages/workbench/src/qa/mock-api.ts
@@ -4,42 +4,97 @@ import { Clock, Effect, Match, Option, Schema as S } from "effect";
 
 type ConfigValues = Record<string, Record<string, unknown>>;
 
-export interface MockWorkbenchFixture {
-  readonly settings?: {
-    readonly user?: string;
-    readonly apiKey?: string;
-    readonly gatewayUrl?: string;
-    readonly collection?: string;
-    readonly featureSwitches?: Record<string, boolean>;
-  };
-  readonly flows?: {
-    readonly activeIds?: string[];
-    readonly definitions?: Record<string, Record<string, unknown>>;
-    readonly blueprints?: Record<string, Record<string, unknown>>;
-  };
-  readonly config?: {
-    readonly prompt?: Record<string, unknown>;
-    readonly valuesByType?: ConfigValues;
-  };
-  readonly library?: {
-    readonly documents?: DocumentMetadata[];
-    readonly processing?: ProcessingMetadata[];
-    readonly metadataById?: Record<string, DocumentMetadata>;
-  };
-  readonly knowledge?: {
-    readonly kgCores?: string[];
-    readonly deCores?: string[];
-    readonly loadedKgCores?: string[];
-  };
-  readonly collections?: Array<Record<string, unknown>>;
-  readonly graph?: {
-    readonly triplesByFlowCollection?: Record<string, Triple[]>;
-    readonly explainTriplesByGraph?: Record<string, Triple[]>;
-  };
-  readonly chat?: {
-    readonly delayFrames?: number;
-  };
-}
+const UnknownRecord = S.Record(S.String, S.Unknown);
+const ConfigValuesRecord = S.Record(S.String, UnknownRecord);
+
+const ClientTerm: S.Codec<Triple["s"], Triple["s"]> = S.suspend(() =>
+  S.Union([
+    S.Struct({ t: S.Literal("i"), i: S.String }),
+    S.Struct({ t: S.Literal("b"), d: S.String }),
+    S.Struct({
+      t: S.Literal("l"),
+      v: S.String,
+      dt: S.optionalKey(S.String),
+      ln: S.optionalKey(S.String),
+    }),
+    S.Struct({
+      t: S.Literal("t"),
+      tr: S.optionalKey(ClientTriple),
+    }),
+  ])
+);
+
+const ClientTriple: S.Codec<Triple, Triple> = S.suspend(() =>
+  S.Struct({
+    s: ClientTerm,
+    p: ClientTerm,
+    o: ClientTerm,
+    g: S.optionalKey(S.String),
+  })
+);
+
+const DocumentMetadataValue: S.Codec<DocumentMetadata, DocumentMetadata> = S.Struct({
+  id: S.optionalKey(S.String),
+  time: S.optionalKey(S.Finite),
+  kind: S.optionalKey(S.String),
+  title: S.optionalKey(S.String),
+  comments: S.optionalKey(S.String),
+  metadata: S.optionalKey(S.Array(ClientTriple).pipe(S.mutable)),
+  user: S.optionalKey(S.String),
+  tags: S.optionalKey(S.Array(S.String).pipe(S.mutable)),
+  parentId: S.optionalKey(S.String),
+  documentType: S.optionalKey(S.String),
+  "parent-id": S.optionalKey(S.String),
+  "document-type": S.optionalKey(S.String),
+});
+
+const ProcessingMetadataValue: S.Codec<ProcessingMetadata, ProcessingMetadata> = S.Struct({
+  id: S.optionalKey(S.String),
+  "document-id": S.optionalKey(S.String),
+  documentId: S.optionalKey(S.String),
+  time: S.optionalKey(S.Finite),
+  flow: S.optionalKey(S.String),
+  user: S.optionalKey(S.String),
+  collection: S.optionalKey(S.String),
+  tags: S.optionalKey(S.Array(S.String).pipe(S.mutable)),
+});
+
+export class MockWorkbenchFixture extends S.Class<MockWorkbenchFixture>("MockWorkbenchFixture")({
+  settings: S.optionalKey(S.Struct({
+    user: S.optionalKey(S.String),
+    apiKey: S.optionalKey(S.String),
+    gatewayUrl: S.optionalKey(S.String),
+    collection: S.optionalKey(S.String),
+    featureSwitches: S.optionalKey(S.Record(S.String, S.Boolean)),
+  })),
+  flows: S.optionalKey(S.Struct({
+    activeIds: S.optionalKey(S.Array(S.String).pipe(S.mutable)),
+    definitions: S.optionalKey(S.Record(S.String, UnknownRecord)),
+    blueprints: S.optionalKey(S.Record(S.String, UnknownRecord)),
+  })),
+  config: S.optionalKey(S.Struct({
+    prompt: S.optionalKey(UnknownRecord),
+    valuesByType: S.optionalKey(ConfigValuesRecord),
+  })),
+  library: S.optionalKey(S.Struct({
+    documents: S.optionalKey(S.Array(DocumentMetadataValue).pipe(S.mutable)),
+    processing: S.optionalKey(S.Array(ProcessingMetadataValue).pipe(S.mutable)),
+    metadataById: S.optionalKey(S.Record(S.String, DocumentMetadataValue)),
+  })),
+  knowledge: S.optionalKey(S.Struct({
+    kgCores: S.optionalKey(S.Array(S.String).pipe(S.mutable)),
+    deCores: S.optionalKey(S.Array(S.String).pipe(S.mutable)),
+    loadedKgCores: S.optionalKey(S.Array(S.String).pipe(S.mutable)),
+  })),
+  collections: S.optionalKey(S.Array(UnknownRecord).pipe(S.mutable)),
+  graph: S.optionalKey(S.Struct({
+    triplesByFlowCollection: S.optionalKey(S.Record(S.String, S.Array(ClientTriple).pipe(S.mutable))),
+    explainTriplesByGraph: S.optionalKey(S.Record(S.String, S.Array(ClientTriple).pipe(S.mutable))),
+  })),
+  chat: S.optionalKey(S.Struct({
+    delayFrames: S.optionalKey(S.Finite),
+  })),
+}, { description: "Seed fixture for deterministic workbench QA runs." }) {}
 
 interface UploadSession {
   readonly metadata: DocumentMetadata;
diff --git a/ts/scripts/check-effect-laws.ts b/ts/scripts/check-effect-laws.ts
index 16b84259..a66c5baf 100644
Binary files a/ts/scripts/check-effect-laws.ts and b/ts/scripts/check-effect-laws.ts differ
diff --git a/ts/scripts/effect-laws.allowlist.json b/ts/scripts/effect-laws.allowlist.json
index 822dc21f..57811ddf 100644
--- a/ts/scripts/effect-laws.allowlist.json
+++ b/ts/scripts/effect-laws.allowlist.json
@@ -1 +1 @@
-{"exemptions":[],"baseline":[{"rule":"no-effect-run","path":"packages/base/src/processor/async-processor.ts","count":1},{"rule":"no-effect-run","path":"packages/client/src/socket/effect-rpc-client.ts","count":10},{"rule":"no-effect-run","path":"packages/client/src/socket/trustgraph-socket.ts","count":9},{"rule":"no-effect-run","path":"packages/flow/src/agent/mcp-tool/service.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/agent/react/service.ts","count":2},{"rule":"no-effect-run","path":"packages/flow/src/chunking/service.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/decoding/pdf-decoder.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/embeddings/ollama.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/extract/knowledge-extract.ts","count":4},{"rule":"no-effect-run","path":"packages/flow/src/librarian/service.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/azure-openai.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/claude.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/mistral.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/ollama.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/openai-compatible.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/openai.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/prompt/template.ts","count":1},{"rule":"no-effect-run","path":"packages/mcp/src/server-effect.ts","count":1},{"rule":"no-effect-run","path":"packages/workbench/src/atoms/workbench.ts","count":1},{"rule":"no-effect-run","path":"packages/workbench/src/components/error-boundary.tsx","count":1},{"rule":"no-effect-run","path":"packages/workbench/src/qa/mock-api.ts","count":1},{"rule":"no-error-throw","path":"packages/workbench/src/main.tsx","count":1},{"rule":"no-error-throw","path":"scripts/seed-config.ts","count":1},{"rule":"no-error-throw","path":"scripts/seed-demo.ts","count":4},{"rule":"no-error-throw","path":"scripts/seed-flows.ts","count":2},{"rule":"no-error-throw","path":"scripts/test-pipeline.ts","count":2},{"rule":"no-native-fetch","path":"scripts/seed-config.ts","count":1},{"rule":"no-native-fetch","path":"scripts/seed-demo.ts","count":11},{"rule":"no-native-fetch","path":"scripts/seed-flows.ts","count":1},{"rule":"no-native-fetch","path":"scripts/test-pipeline.ts","count":5},{"rule":"no-native-json","path":"scripts/seed-config.ts","count":6},{"rule":"no-native-json","path":"scripts/seed-demo.ts","count":6},{"rule":"no-native-json","path":"scripts/seed-flows.ts","count":3},{"rule":"no-native-json","path":"scripts/test-pipeline.ts","count":6},{"rule":"no-native-sort","path":"packages/client/src/socket/trustgraph-socket.ts","count":2},{"rule":"no-native-sort","path":"packages/flow/src/config/service.ts","count":3},{"rule":"no-native-sort","path":"packages/flow/src/cores/service.ts","count":1},{"rule":"no-native-sort","path":"packages/flow/src/flow-manager/service.ts","count":1},{"rule":"no-native-sort","path":"packages/flow/src/librarian/service.ts","count":1},{"rule":"no-native-sort","path":"packages/flow/src/retrieval/graph-rag.ts","count":1},{"rule":"no-native-sort","path":"packages/workbench/src/atoms/workbench.ts","count":2},{"rule":"no-native-sort","path":"packages/workbench/src/components/chat/explain-graph.tsx","count":1},{"rule":"no-native-sort","path":"packages/workbench/src/pages/graph.tsx","count":1},{"rule":"no-native-sort","path":"packages/workbench/src/qa/mock-api.ts","count":1},{"rule":"no-native-sort","path":"scripts/inventory-native-classes.ts","count":1},{"rule":"no-native-sort","path":"scripts/seed-demo.ts","count":1},{"rule":"no-native-sort","path":"scripts/seed-flows.ts","count":1},{"rule":"no-native-timers","path":"scripts/test-pipeline.ts","count":2},{"rule":"no-node-fs-path","path":"scripts/create-test-pdf.ts","count":1},{"rule":"no-node-fs-path","path":"scripts/inventory-native-classes.ts","count":2},{"rule":"no-process-env","path":"scripts/seed-config.ts","count":2},{"rule":"no-process-env","path":"scripts/seed-demo.ts","count":5},{"rule":"no-process-env","path":"scripts/seed-flows.ts","count":1},{"rule":"no-process-env","path":"scripts/test-pipeline.ts","count":11},{"rule":"no-schema-suffix","path":"packages/base/src/schema/primitives.ts","count":1},{"rule":"schema-first-data","path":"packages/base/src/backend/types.ts","count":2},{"rule":"schema-first-data","path":"packages/base/src/messaging/consumer.ts","count":2},{"rule":"schema-first-data","path":"packages/base/src/messaging/request-response.ts","count":1},{"rule":"schema-first-data","path":"packages/base/src/messaging/runtime.ts","count":4},{"rule":"schema-first-data","path":"packages/base/src/metrics/prometheus.ts","count":1},{"rule":"schema-first-data","path":"packages/base/src/processor/async-processor.ts","count":1},{"rule":"schema-first-data","path":"packages/base/src/processor/flow.ts","count":2},{"rule":"schema-first-data","path":"packages/base/src/runtime/config.ts","count":1},{"rule":"schema-first-data","path":"packages/base/src/runtime/messaging-config.ts","count":1},{"rule":"schema-first-data","path":"packages/base/src/schema/primitives.ts","count":2},{"rule":"schema-first-data","path":"packages/cli/src/commands/util.ts","count":1},{"rule":"schema-first-data","path":"packages/client/src/models/Triple.ts","count":6},{"rule":"schema-first-data","path":"packages/client/src/models/messages.ts","count":58},{"rule":"schema-first-data","path":"packages/client/src/socket/effect-rpc-client.ts","count":3},{"rule":"schema-first-data","path":"packages/client/src/socket/trustgraph-socket.ts","count":5},{"rule":"schema-first-data","path":"packages/flow/src/agent/react/tools.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/agent/react/types.ts","count":2},{"rule":"schema-first-data","path":"packages/flow/src/config/service.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/cores/service.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/embeddings/ollama.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/gateway/rpc-server.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/gateway/server.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/librarian/collection-manager.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/librarian/service.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/model/text-completion/common.ts","count":1},{"rule":"schema-first-data","path":"packages/flow/src/prompt/template.ts","count":2},{"rule":"schema-first-data","path":"packages/flow/src/qdrant/client.ts","count":4},{"rule":"schema-first-data","path":"packages/flow/src/query/embeddings/qdrant-doc.ts","count":3},{"rule":"schema-first-data","path":"packages/flow/src/query/embeddings/qdrant-graph.ts","count":3},{"rule":"schema-first-data","path":"packages/flow/src/query/triples/falkordb.ts","count":2},{"rule":"schema-first-data","path":"packages/flow/src/retrieval/document-rag.ts","count":2},{"rule":"schema-first-data","path":"packages/flow/src/retrieval/graph-rag.ts","count":4},{"rule":"schema-first-data","path":"packages/flow/src/storage/embeddings/qdrant-doc.ts","count":3},{"rule":"schema-first-data","path":"packages/flow/src/storage/embeddings/qdrant-graph.ts","count":3},{"rule":"schema-first-data","path":"packages/flow/src/storage/triples/falkordb.ts","count":2},{"rule":"schema-first-data","path":"packages/mcp/src/server-effect.ts","count":2},{"rule":"schema-first-data","path":"packages/workbench/src/atoms/workbench.ts","count":21},{"rule":"schema-first-data","path":"packages/workbench/src/lib/graph-utils.ts","count":3},{"rule":"schema-first-data","path":"packages/workbench/src/qa/initial-values.ts","count":1},{"rule":"schema-first-data","path":"packages/workbench/src/qa/mock-api.ts","count":1}]}
+{"exemptions":[],"baseline":[{"rule":"no-effect-run","path":"packages/base/src/processor/async-processor.ts","count":1},{"rule":"no-effect-run","path":"packages/client/src/socket/effect-rpc-client.ts","count":10},{"rule":"no-effect-run","path":"packages/client/src/socket/trustgraph-socket.ts","count":9},{"rule":"no-effect-run","path":"packages/flow/src/agent/mcp-tool/service.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/agent/react/service.ts","count":2},{"rule":"no-effect-run","path":"packages/flow/src/chunking/service.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/decoding/pdf-decoder.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/embeddings/ollama.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/extract/knowledge-extract.ts","count":4},{"rule":"no-effect-run","path":"packages/flow/src/librarian/service.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/azure-openai.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/claude.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/mistral.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/ollama.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/openai-compatible.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/model/text-completion/openai.ts","count":1},{"rule":"no-effect-run","path":"packages/flow/src/prompt/template.ts","count":1},{"rule":"no-effect-run","path":"packages/mcp/src/server-effect.ts","count":1},{"rule":"no-effect-run","path":"packages/workbench/src/atoms/workbench.ts","count":1},{"rule":"no-effect-run","path":"packages/workbench/src/components/error-boundary.tsx","count":1},{"rule":"no-effect-run","path":"packages/workbench/src/qa/mock-api.ts","count":1},{"rule":"no-error-throw","path":"packages/workbench/src/main.tsx","count":1},{"rule":"no-error-throw","path":"scripts/seed-config.ts","count":1},{"rule":"no-error-throw","path":"scripts/seed-demo.ts","count":4},{"rule":"no-error-throw","path":"scripts/seed-flows.ts","count":2},{"rule":"no-error-throw","path":"scripts/test-pipeline.ts","count":2},{"rule":"no-native-fetch","path":"scripts/seed-config.ts","count":1},{"rule":"no-native-fetch","path":"scripts/seed-demo.ts","count":11},{"rule":"no-native-fetch","path":"scripts/seed-flows.ts","count":1},{"rule":"no-native-fetch","path":"scripts/test-pipeline.ts","count":5},{"rule":"no-native-json","path":"scripts/seed-config.ts","count":6},{"rule":"no-native-json","path":"scripts/seed-demo.ts","count":6},{"rule":"no-native-json","path":"scripts/seed-flows.ts","count":3},{"rule":"no-native-json","path":"scripts/test-pipeline.ts","count":6},{"rule":"no-native-sort","path":"packages/client/src/socket/trustgraph-socket.ts","count":2},{"rule":"no-native-sort","path":"packages/flow/src/config/service.ts","count":3},{"rule":"no-native-sort","path":"packages/flow/src/cores/service.ts","count":1},{"rule":"no-native-sort","path":"packages/flow/src/flow-manager/service.ts","count":1},{"rule":"no-native-sort","path":"packages/flow/src/librarian/service.ts","count":1},{"rule":"no-native-sort","path":"packages/flow/src/retrieval/graph-rag.ts","count":1},{"rule":"no-native-sort","path":"packages/workbench/src/atoms/workbench.ts","count":2},{"rule":"no-native-sort","path":"packages/workbench/src/components/chat/explain-graph.tsx","count":1},{"rule":"no-native-sort","path":"packages/workbench/src/pages/graph.tsx","count":1},{"rule":"no-native-sort","path":"packages/workbench/src/qa/mock-api.ts","count":1},{"rule":"no-native-sort","path":"scripts/inventory-native-classes.ts","count":1},{"rule":"no-native-sort","path":"scripts/seed-demo.ts","count":1},{"rule":"no-native-sort","path":"scripts/seed-flows.ts","count":1},{"rule":"no-native-timers","path":"scripts/test-pipeline.ts","count":2},{"rule":"no-node-fs-path","path":"scripts/create-test-pdf.ts","count":1},{"rule":"no-node-fs-path","path":"scripts/inventory-native-classes.ts","count":2},{"rule":"no-process-env","path":"scripts/seed-config.ts","count":2},{"rule":"no-process-env","path":"scripts/seed-demo.ts","count":5},{"rule":"no-process-env","path":"scripts/seed-flows.ts","count":1},{"rule":"no-process-env","path":"scripts/test-pipeline.ts","count":11},{"rule":"no-schema-suffix","path":"packages/base/src/schema/primitives.ts","count":1},{"rule":"schema-first-data","path":"packages/client/src/models/Triple.ts","count":6},{"rule":"schema-first-data","path":"packages/client/src/models/messages.ts","count":58},{"rule":"schema-first-data","path":"packages/client/src/socket/effect-rpc-client.ts","count":2},{"rule":"schema-first-data","path":"packages/client/src/socket/trustgraph-socket.ts","count":4}]}