Merge pull request 'feat: uwf — Stateless Workflow CLI' (#317) from feat/309-uwf-stateless into main

This commit is contained in:
2026-05-18 10:07:55 +00:00
38 changed files with 2730 additions and 2 deletions
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{
"name": "@uncaged/cli-uwf",
"version": "0.1.0",
"files": [
"src",
"dist",
"package.json"
],
"type": "module",
"bin": {
"uwf": "./src/cli.ts"
},
"dependencies": {
"@uncaged/json-cas": "workspace:^",
"@uncaged/json-cas-fs": "workspace:^",
"@uncaged/uwf-agent-kit": "workspace:^",
"@uncaged/uwf-moderator": "workspace:^",
"@uncaged/uwf-protocol": "workspace:^",
"@uncaged/workflow-util": "workspace:^",
"commander": "^14.0.3",
"dotenv": "^16.6.1",
"yaml": "^2.8.4"
},
"scripts": {
"test": "bun test"
},
"publishConfig": {
"access": "public"
}
}
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#!/usr/bin/env bun
import { Command } from "commander";
import {
cmdThreadKill,
cmdThreadList,
cmdThreadShow,
cmdThreadStart,
cmdThreadStep,
} from "./commands/thread.js";
import { cmdWorkflowList, cmdWorkflowPut, cmdWorkflowShow } from "./commands/workflow.js";
import { resolveStorageRoot } from "./store.js";
function writeJson(data: unknown): void {
process.stdout.write(`${JSON.stringify(data)}\n`);
}
function runAction(action: () => Promise<void>): void {
action().catch((e: unknown) => {
const message = e instanceof Error ? e.message : String(e);
process.stderr.write(`${message}\n`);
process.exit(1);
});
}
const program = new Command();
program.name("uwf").description("Stateless workflow CLI");
const workflow = program.command("workflow").description("Workflow registry and CAS");
workflow
.command("put")
.description("Register a workflow from YAML")
.argument("<file>", "Workflow YAML file")
.action((file: string) => {
const storageRoot = resolveStorageRoot();
runAction(async () => {
const result = await cmdWorkflowPut(storageRoot, file);
writeJson(result);
});
});
workflow
.command("show")
.description("Show a workflow by name or CAS hash")
.argument("<id>", "Workflow name or hash")
.action((id: string) => {
const storageRoot = resolveStorageRoot();
runAction(async () => {
const result = await cmdWorkflowShow(storageRoot, id);
writeJson(result);
});
});
workflow
.command("list")
.description("List registered workflows")
.action(() => {
const storageRoot = resolveStorageRoot();
runAction(async () => {
const result = await cmdWorkflowList(storageRoot);
writeJson(result);
});
});
const thread = program.command("thread").description("Thread lifecycle and execution");
thread
.command("start")
.description("Create a thread without executing")
.argument("<workflow>", "Workflow name or hash")
.requiredOption("-p, --prompt <text>", "User prompt")
.action((workflow: string, opts: { prompt: string }) => {
const storageRoot = resolveStorageRoot();
runAction(async () => {
const result = await cmdThreadStart(storageRoot, workflow, opts.prompt);
writeJson(result);
});
});
thread
.command("step")
.description("Execute one step")
.argument("<thread-id>", "Thread ULID")
.option("--agent <cmd>", "Override agent command")
.action((threadId: string, opts: { agent: string | undefined }) => {
const storageRoot = resolveStorageRoot();
runAction(async () => {
const agentOverride = opts.agent ?? null;
const result = await cmdThreadStep(storageRoot, threadId, agentOverride);
writeJson(result);
});
});
thread
.command("show")
.description("Show thread head pointer")
.argument("<thread-id>", "Thread ULID")
.action((threadId: string) => {
const storageRoot = resolveStorageRoot();
runAction(async () => {
const result = await cmdThreadShow(storageRoot, threadId);
writeJson(result);
});
});
thread
.command("list")
.description("List active threads")
.option("--all", "Include archived threads")
.action((opts: { all: boolean }) => {
const storageRoot = resolveStorageRoot();
runAction(async () => {
const result = await cmdThreadList(storageRoot, opts.all);
writeJson(result);
});
});
thread
.command("kill")
.description("Terminate and archive a thread")
.argument("<thread-id>", "Thread ULID")
.action((threadId: string) => {
const storageRoot = resolveStorageRoot();
runAction(async () => {
const result = await cmdThreadKill(storageRoot, threadId);
writeJson(result);
});
});
program.parseAsync(process.argv).catch((e: unknown) => {
const message = e instanceof Error ? e.message : String(e);
process.stderr.write(`${message}\n`);
process.exit(1);
});
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import { execFileSync } from "node:child_process";
import { validate } from "@uncaged/json-cas";
import { getEnvPath, loadWorkflowConfig } from "@uncaged/uwf-agent-kit";
import { evaluate } from "@uncaged/uwf-moderator";
import type {
AgentAlias,
AgentConfig,
CasRef,
ModeratorContext,
StartNodePayload,
StartOutput,
StepContext,
StepNodePayload,
StepOutput,
ThreadId,
ThreadListItem,
WorkflowConfig,
WorkflowPayload,
} from "@uncaged/uwf-protocol";
import { generateUlid } from "@uncaged/workflow-util";
import { config as loadDotenv } from "dotenv";
import {
appendThreadHistory,
createUwfStore,
findThreadInHistory,
loadThreadHistory,
loadThreadsIndex,
loadWorkflowRegistry,
resolveWorkflowHash,
saveThreadsIndex,
type ThreadHistoryLine,
type UwfStore,
} from "../store.js";
import { isCasRef } from "../validate.js";
const END_ROLE = "$END";
type ChainState = {
startHash: CasRef;
start: StartNodePayload;
stepsNewestFirst: StepNodePayload[];
headIsStart: boolean;
};
export type KillOutput = {
thread: ThreadId;
archived: boolean;
};
function fail(message: string): never {
process.stderr.write(`${message}\n`);
process.exit(1);
}
async function resolveWorkflowCasRef(
uwf: UwfStore,
storageRoot: string,
workflowId: string,
): Promise<CasRef> {
const registry = await loadWorkflowRegistry(storageRoot);
const hash = resolveWorkflowHash(registry, workflowId);
if (!isCasRef(hash)) {
fail(`workflow not found: ${workflowId}`);
}
const node = uwf.store.get(hash);
if (node === null) {
fail(`CAS node not found: ${hash}`);
}
if (node.type !== uwf.schemas.workflow) {
fail(`node ${hash} is not a Workflow (type ${node.type})`);
}
return hash;
}
function resolveWorkflowFromHead(uwf: UwfStore, head: CasRef): CasRef | null {
const node = uwf.store.get(head);
if (node === null) {
return null;
}
if (node.type === uwf.schemas.startNode) {
const payload = node.payload as StartNodePayload;
return payload.workflow;
}
const payload = node.payload as StepNodePayload;
if (typeof payload.start !== "string") {
return null;
}
const startNode = uwf.store.get(payload.start);
if (startNode === null || startNode.type !== uwf.schemas.startNode) {
return null;
}
return (startNode.payload as StartNodePayload).workflow;
}
export async function cmdThreadStart(
storageRoot: string,
workflowId: string,
prompt: string,
): Promise<StartOutput> {
const uwf = await createUwfStore(storageRoot);
const workflowHash = await resolveWorkflowCasRef(uwf, storageRoot, workflowId);
const threadId = generateUlid(Date.now()) as ThreadId;
const startPayload: StartNodePayload = {
workflow: workflowHash,
prompt,
};
const headHash = await uwf.store.put(uwf.schemas.startNode, startPayload);
const node = uwf.store.get(headHash);
if (node === null || !validate(uwf.store, node)) {
fail("stored StartNode failed schema validation");
}
const index = await loadThreadsIndex(storageRoot);
index[threadId] = headHash;
await saveThreadsIndex(storageRoot, index);
return { workflow: workflowHash, thread: threadId };
}
export async function cmdThreadShow(storageRoot: string, threadId: ThreadId): Promise<StepOutput> {
const index = await loadThreadsIndex(storageRoot);
const activeHead = index[threadId];
if (activeHead !== undefined) {
const uwf = await createUwfStore(storageRoot);
const workflow = resolveWorkflowFromHead(uwf, activeHead);
if (workflow === null) {
fail(`failed to resolve workflow from head: ${activeHead}`);
}
return {
workflow,
thread: threadId,
head: activeHead,
done: false,
};
}
const hist = await findThreadInHistory(storageRoot, threadId);
if (hist !== null) {
return {
workflow: hist.workflow,
thread: threadId,
head: hist.head,
done: true,
};
}
fail(`thread not found: ${threadId}`);
}
async function threadListItemFromActive(
uwf: UwfStore,
threadId: ThreadId,
head: CasRef,
): Promise<ThreadListItem | null> {
const workflow = resolveWorkflowFromHead(uwf, head);
if (workflow === null) {
return null;
}
return { thread: threadId, workflow, head };
}
export async function cmdThreadList(
storageRoot: string,
includeAll: boolean,
): Promise<ThreadListItem[]> {
const uwf = await createUwfStore(storageRoot);
const index = await loadThreadsIndex(storageRoot);
const items: ThreadListItem[] = [];
for (const [threadId, head] of Object.entries(index)) {
const item = await threadListItemFromActive(uwf, threadId as ThreadId, head);
if (item !== null) {
items.push(item);
}
}
if (!includeAll) {
return items;
}
const activeIds = new Set(items.map((i) => i.thread));
const history = await loadThreadHistory(storageRoot);
for (const entry of history) {
if (!activeIds.has(entry.thread)) {
items.push({
thread: entry.thread,
workflow: entry.workflow,
head: entry.head,
});
}
}
return items;
}
function walkChain(uwf: UwfStore, headHash: CasRef): ChainState {
const headNode = uwf.store.get(headHash);
if (headNode === null) {
fail(`CAS node not found: ${headHash}`);
}
if (headNode.type === uwf.schemas.startNode) {
return {
startHash: headHash,
start: headNode.payload as StartNodePayload,
stepsNewestFirst: [],
headIsStart: true,
};
}
if (headNode.type !== uwf.schemas.stepNode) {
fail(`head ${headHash} is not a StartNode or StepNode`);
}
const stepsNewestFirst: StepNodePayload[] = [];
let hash: CasRef | null = headHash;
while (hash !== null) {
const node = uwf.store.get(hash);
if (node === null) {
fail(`CAS node not found while walking chain: ${hash}`);
}
if (node.type !== uwf.schemas.stepNode) {
break;
}
const payload = node.payload as StepNodePayload;
stepsNewestFirst.push(payload);
hash = payload.prev;
}
const newest = stepsNewestFirst[0];
if (newest === undefined) {
fail(`empty step chain at head ${headHash}`);
}
const startNode = uwf.store.get(newest.start);
if (startNode === null || startNode.type !== uwf.schemas.startNode) {
fail(`StartNode not found: ${newest.start}`);
}
return {
startHash: newest.start,
start: startNode.payload as StartNodePayload,
stepsNewestFirst,
headIsStart: false,
};
}
function expandOutput(uwf: UwfStore, outputRef: CasRef): unknown {
const node = uwf.store.get(outputRef);
if (node === null) {
return {};
}
return node.payload;
}
function buildModeratorContext(uwf: UwfStore, chain: ChainState): ModeratorContext {
const chronological = [...chain.stepsNewestFirst].reverse();
const steps: StepContext[] = chronological.map((step) => ({
role: step.role,
output: expandOutput(uwf, step.output),
detail: step.detail,
agent: step.agent,
}));
return { start: chain.start, steps };
}
function loadWorkflowPayload(uwf: UwfStore, workflowRef: CasRef): WorkflowPayload {
const node = uwf.store.get(workflowRef);
if (node === null) {
fail(`workflow CAS node not found: ${workflowRef}`);
}
if (node.type !== uwf.schemas.workflow) {
fail(`node ${workflowRef} is not a Workflow`);
}
return node.payload as WorkflowPayload;
}
function parseAgentOverride(override: string): AgentConfig {
const parts = override
.trim()
.split(/\s+/)
.filter((p) => p.length > 0);
const command = parts[0];
if (command === undefined) {
fail("agent override must not be empty");
}
return { command, args: parts.slice(1) };
}
function resolveAgentConfig(
config: WorkflowConfig,
workflow: WorkflowPayload,
role: string,
agentOverride: string | null,
): AgentConfig {
if (agentOverride !== null) {
return parseAgentOverride(agentOverride);
}
let alias: AgentAlias = config.defaultAgent;
if (config.agentOverrides !== null) {
const roleOverrides = config.agentOverrides[workflow.name];
if (roleOverrides !== undefined && roleOverrides[role] !== undefined) {
alias = roleOverrides[role];
}
}
const agentConfig = config.agents[alias];
if (agentConfig === undefined) {
fail(`unknown agent alias in config: ${alias}`);
}
return agentConfig;
}
function spawnAgent(agent: AgentConfig, threadId: ThreadId, role: string): CasRef {
const argv = [...agent.args, threadId, role];
let stdout: string;
try {
stdout = execFileSync(agent.command, argv, {
encoding: "utf8",
env: process.env,
stdio: ["ignore", "pipe", "pipe"],
});
} catch (e) {
const err = e as NodeJS.ErrnoException & { stderr?: Buffer | string };
const stderr =
err.stderr === undefined
? ""
: typeof err.stderr === "string"
? err.stderr
: err.stderr.toString("utf8");
const detail = stderr.trim() !== "" ? `: ${stderr.trim()}` : "";
fail(`agent command failed (${agent.command})${detail}`);
}
const line = stdout.trim().split("\n").pop()?.trim() ?? "";
if (!isCasRef(line)) {
fail(`agent stdout is not a valid CAS hash: ${line || "(empty)"}`);
}
return line;
}
async function archiveThread(
storageRoot: string,
threadId: ThreadId,
workflow: CasRef,
head: CasRef,
): Promise<void> {
const index = await loadThreadsIndex(storageRoot);
delete index[threadId];
await saveThreadsIndex(storageRoot, index);
await appendThreadHistory(storageRoot, {
thread: threadId,
workflow,
head,
completedAt: Date.now(),
});
}
export async function cmdThreadStep(
storageRoot: string,
threadId: ThreadId,
agentOverride: string | null,
): Promise<StepOutput> {
const index = await loadThreadsIndex(storageRoot);
const headHash = index[threadId];
if (headHash === undefined) {
fail(`thread not active: ${threadId}`);
}
const uwf = await createUwfStore(storageRoot);
const chain = walkChain(uwf, headHash);
const workflowHash = chain.start.workflow;
const workflow = loadWorkflowPayload(uwf, workflowHash);
const context = buildModeratorContext(uwf, chain);
const nextResult = await evaluate(workflow, context);
if (!nextResult.ok) {
fail(nextResult.error.message);
}
if (nextResult.value === END_ROLE) {
await archiveThread(storageRoot, threadId, workflowHash, headHash);
return {
workflow: workflowHash,
thread: threadId,
head: headHash,
done: true,
};
}
const role = nextResult.value;
const config = await loadWorkflowConfig(storageRoot);
const agent = resolveAgentConfig(config, workflow, role, agentOverride);
loadDotenv({ path: getEnvPath(storageRoot) });
const newHead = spawnAgent(agent, threadId, role);
// Re-create store to pick up nodes written by the agent subprocess
const uwfAfter = await createUwfStore(storageRoot);
const newNode = uwfAfter.store.get(newHead);
if (newNode === null || newNode.type !== uwfAfter.schemas.stepNode) {
fail(`agent returned hash that is not a StepNode: ${newHead}`);
}
// Reload threads index to avoid overwriting changes made by the agent subprocess
const freshIndex = await loadThreadsIndex(storageRoot);
freshIndex[threadId] = newHead;
await saveThreadsIndex(storageRoot, freshIndex);
const chainAfter = walkChain(uwfAfter, newHead);
const contextAfter = buildModeratorContext(uwfAfter, chainAfter);
const afterResult = await evaluate(workflow, contextAfter);
if (!afterResult.ok) {
fail(afterResult.error.message);
}
const done = afterResult.value === END_ROLE;
if (done) {
await archiveThread(storageRoot, threadId, workflowHash, newHead);
}
return {
workflow: workflowHash,
thread: threadId,
head: newHead,
done,
};
}
export async function cmdThreadKill(storageRoot: string, threadId: ThreadId): Promise<KillOutput> {
const index = await loadThreadsIndex(storageRoot);
const head = index[threadId];
if (head === undefined) {
fail(`thread not active: ${threadId}`);
}
const uwf = await createUwfStore(storageRoot);
const workflow = resolveWorkflowFromHead(uwf, head);
if (workflow === null) {
fail(`failed to resolve workflow from head: ${head}`);
}
delete index[threadId];
await saveThreadsIndex(storageRoot, index);
const historyEntry: ThreadHistoryLine = {
thread: threadId,
workflow,
head,
completedAt: Date.now(),
};
await appendThreadHistory(storageRoot, historyEntry);
return { thread: threadId, archived: true };
}
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import { readFile } from "node:fs/promises";
import type { JSONSchema } from "@uncaged/json-cas";
import { putSchema, validate } from "@uncaged/json-cas";
import type { CasRef, RoleDefinition, WorkflowPayload } from "@uncaged/uwf-protocol";
import { parse } from "yaml";
import {
createUwfStore,
findRegistryName,
loadWorkflowRegistry,
resolveWorkflowHash,
saveWorkflowRegistry,
type UwfStore,
} from "../store.js";
import { isCasRef, parseWorkflowPayload } from "../validate.js";
export type WorkflowListEntry = {
name: string;
hash: CasRef;
};
export type WorkflowPutOutput = {
name: string;
hash: CasRef;
};
export type WorkflowShowOutput = {
hash: CasRef;
name: string | null;
type: CasRef;
payload: WorkflowPayload;
timestamp: number;
};
function fail(message: string): never {
process.stderr.write(`${message}\n`);
process.exit(1);
}
function isJsonSchema(value: unknown): value is JSONSchema {
return typeof value === "object" && value !== null && !Array.isArray(value);
}
async function resolveOutputSchemaRef(
uwf: UwfStore,
outputSchema: string | JSONSchema,
): Promise<CasRef> {
if (typeof outputSchema === "string") {
if (!isCasRef(outputSchema)) {
fail(`invalid outputSchema cas_ref: ${outputSchema}`);
}
if (!uwf.store.has(outputSchema)) {
fail(`outputSchema not found in CAS: ${outputSchema}`);
}
return outputSchema;
}
if (!isJsonSchema(outputSchema)) {
fail("outputSchema must be a cas_ref string or JSON Schema object");
}
return putSchema(uwf.store, outputSchema);
}
async function materializeWorkflowPayload(
uwf: UwfStore,
raw: WorkflowPayload,
): Promise<WorkflowPayload> {
const roles: Record<string, RoleDefinition> = {};
for (const [roleName, role] of Object.entries(raw.roles)) {
const outputSchema = await resolveOutputSchemaRef(
uwf,
role.outputSchema as string | JSONSchema,
);
roles[roleName] = {
description: role.description,
systemPrompt: role.systemPrompt,
outputSchema,
};
}
return {
name: raw.name,
description: raw.description,
roles,
conditions: raw.conditions,
graph: raw.graph,
};
}
export async function cmdWorkflowPut(
storageRoot: string,
filePath: string,
): Promise<WorkflowPutOutput> {
let text: string;
try {
text = await readFile(filePath, "utf8");
} catch {
fail(`file not found: ${filePath}`);
}
let raw: unknown;
try {
raw = parse(text) as unknown;
} catch (e) {
fail(`invalid YAML: ${e instanceof Error ? e.message : String(e)}`);
}
const payload = parseWorkflowPayload(raw);
if (payload === null) {
fail("invalid workflow YAML: expected WorkflowPayload shape");
}
const uwf = await createUwfStore(storageRoot);
const materialized = await materializeWorkflowPayload(uwf, payload);
const hash = await uwf.store.put(uwf.schemas.workflow, materialized);
const node = uwf.store.get(hash);
if (node === null || !validate(uwf.store, node)) {
fail("stored workflow failed schema validation");
}
const registry = await loadWorkflowRegistry(storageRoot);
registry[materialized.name] = hash;
await saveWorkflowRegistry(storageRoot, registry);
return { name: materialized.name, hash };
}
export async function cmdWorkflowShow(
storageRoot: string,
id: string,
): Promise<WorkflowShowOutput> {
const uwf = await createUwfStore(storageRoot);
const registry = await loadWorkflowRegistry(storageRoot);
const hash = resolveWorkflowHash(registry, id);
const node = uwf.store.get(hash);
if (node === null) {
fail(`CAS node not found: ${hash}`);
}
if (node.type !== uwf.schemas.workflow) {
fail(`node ${hash} is not a Workflow (type ${node.type})`);
}
const payload = node.payload as WorkflowPayload;
return {
hash,
name: findRegistryName(registry, hash),
type: node.type,
payload,
timestamp: node.timestamp,
};
}
export async function cmdWorkflowList(storageRoot: string): Promise<WorkflowListEntry[]> {
const registry = await loadWorkflowRegistry(storageRoot);
return Object.entries(registry).map(([name, hash]) => ({ name, hash }));
}
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import type { Hash, Store } from "@uncaged/json-cas";
import { putSchema } from "@uncaged/json-cas";
import {
START_NODE_SCHEMA,
STEP_NODE_SCHEMA,
WORKFLOW_SCHEMA,
} from "@uncaged/uwf-protocol";
export type UwfSchemaHashes = {
workflow: Hash;
startNode: Hash;
stepNode: Hash;
};
/**
* Register Workflow, StartNode, and StepNode JSON Schemas in the CAS store.
* Idempotent: safe to call on every CLI invocation.
*/
export async function registerUwfSchemas(store: Store): Promise<UwfSchemaHashes> {
const [workflow, startNode, stepNode] = await Promise.all([
putSchema(store, WORKFLOW_SCHEMA),
putSchema(store, START_NODE_SCHEMA),
putSchema(store, STEP_NODE_SCHEMA),
]);
return { workflow, startNode, stepNode };
}
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import { appendFile, mkdir, readFile, writeFile } from "node:fs/promises";
import { homedir } from "node:os";
import { join } from "node:path";
import type { Hash, Store } from "@uncaged/json-cas";
import { createFsStore } from "@uncaged/json-cas-fs";
import type { CasRef, ThreadId, ThreadListItem, ThreadsIndex } from "@uncaged/uwf-protocol";
import { parse, stringify } from "yaml";
import { registerUwfSchemas, type UwfSchemaHashes } from "./schemas.js";
export type WorkflowRegistry = Record<string, CasRef>;
/** Default filesystem root for uwf data (`~/.uncaged/workflow`). */
export function getDefaultStorageRoot(): string {
return join(homedir(), ".uncaged", "workflow");
}
/**
* Resolve storage root.
* Priority: `UNCAGED_WORKFLOW_STORAGE_ROOT` → `WORKFLOW_STORAGE_ROOT` → default.
*/
export function resolveStorageRoot(): string {
const internal = process.env.UNCAGED_WORKFLOW_STORAGE_ROOT;
if (internal !== undefined && internal !== "") {
return internal;
}
const userOverride = process.env.WORKFLOW_STORAGE_ROOT;
if (userOverride !== undefined && userOverride !== "") {
return userOverride;
}
return getDefaultStorageRoot();
}
export function getCasDir(storageRoot: string): string {
return join(storageRoot, "cas");
}
export function getRegistryPath(storageRoot: string): string {
return join(storageRoot, "workflows.yaml");
}
export function getThreadsPath(storageRoot: string): string {
return join(storageRoot, "threads.yaml");
}
export function getHistoryPath(storageRoot: string): string {
return join(storageRoot, "history.jsonl");
}
export type ThreadHistoryLine = ThreadListItem & {
completedAt: number;
};
export type UwfStore = {
storageRoot: string;
store: Store;
schemas: UwfSchemaHashes;
};
export async function createUwfStore(storageRoot: string): Promise<UwfStore> {
const casDir = getCasDir(storageRoot);
await mkdir(casDir, { recursive: true });
const store = createFsStore(casDir);
const schemas = await registerUwfSchemas(store);
return { storageRoot, store, schemas };
}
export async function loadWorkflowRegistry(storageRoot: string): Promise<WorkflowRegistry> {
const path = getRegistryPath(storageRoot);
try {
const text = await readFile(path, "utf8");
const raw = parse(text) as unknown;
if (raw === null || typeof raw !== "object" || Array.isArray(raw)) {
return {};
}
const registry: WorkflowRegistry = {};
for (const [name, hash] of Object.entries(raw as Record<string, unknown>)) {
if (typeof hash === "string") {
registry[name] = hash;
}
}
return registry;
} catch (e) {
const err = e as NodeJS.ErrnoException;
if (err.code === "ENOENT") {
return {};
}
throw e;
}
}
export async function saveWorkflowRegistry(
storageRoot: string,
registry: WorkflowRegistry,
): Promise<void> {
const path = getRegistryPath(storageRoot);
await mkdir(storageRoot, { recursive: true });
const text = stringify(registry, { indent: 2 });
await writeFile(path, text, "utf8");
}
export function resolveWorkflowHash(registry: WorkflowRegistry, id: string): CasRef {
return registry[id] !== undefined ? registry[id] : id;
}
export function findRegistryName(registry: WorkflowRegistry, hash: Hash): string | null {
for (const [name, h] of Object.entries(registry)) {
if (h === hash) {
return name;
}
}
return null;
}
export async function loadThreadsIndex(storageRoot: string): Promise<ThreadsIndex> {
const path = getThreadsPath(storageRoot);
try {
const text = await readFile(path, "utf8");
const raw = parse(text) as unknown;
if (raw === null || typeof raw !== "object" || Array.isArray(raw)) {
return {};
}
const index: ThreadsIndex = {};
for (const [threadId, head] of Object.entries(raw as Record<string, unknown>)) {
if (typeof head === "string") {
index[threadId as ThreadId] = head;
}
}
return index;
} catch (e) {
const err = e as NodeJS.ErrnoException;
if (err.code === "ENOENT") {
return {};
}
throw e;
}
}
export async function saveThreadsIndex(storageRoot: string, index: ThreadsIndex): Promise<void> {
const path = getThreadsPath(storageRoot);
await mkdir(storageRoot, { recursive: true });
const text = stringify(index, { indent: 2 });
await writeFile(path, text, "utf8");
}
export async function loadThreadHistory(storageRoot: string): Promise<ThreadHistoryLine[]> {
const path = getHistoryPath(storageRoot);
try {
const text = await readFile(path, "utf8");
const lines: ThreadHistoryLine[] = [];
for (const line of text.split("\n")) {
const trimmed = line.trim();
if (trimmed === "") {
continue;
}
let raw: unknown;
try {
raw = JSON.parse(trimmed) as unknown;
} catch {
continue;
}
if (raw === null || typeof raw !== "object" || Array.isArray(raw)) {
continue;
}
const rec = raw as Record<string, unknown>;
const thread = rec.thread;
const workflow = rec.workflow;
const head = rec.head;
const completedAt = rec.completedAt;
if (
typeof thread === "string" &&
typeof workflow === "string" &&
typeof head === "string" &&
typeof completedAt === "number"
) {
lines.push({ thread: thread as ThreadId, workflow, head, completedAt });
}
}
return lines;
} catch (e) {
const err = e as NodeJS.ErrnoException;
if (err.code === "ENOENT") {
return [];
}
throw e;
}
}
export async function findThreadInHistory(
storageRoot: string,
threadId: ThreadId,
): Promise<ThreadHistoryLine | null> {
const history = await loadThreadHistory(storageRoot);
for (let i = history.length - 1; i >= 0; i--) {
const entry = history[i];
if (entry !== undefined && entry.thread === threadId) {
return entry;
}
}
return null;
}
export async function appendThreadHistory(
storageRoot: string,
entry: ThreadHistoryLine,
): Promise<void> {
const path = getHistoryPath(storageRoot);
await mkdir(storageRoot, { recursive: true });
const line = `${JSON.stringify(entry)}\n`;
await appendFile(path, line, "utf8");
}
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import type { CasRef, WorkflowPayload } from "@uncaged/uwf-protocol";
const CAS_REF_PATTERN = /^[0-9A-HJKMNP-TV-Z]{13}$/;
export function isCasRef(value: string): value is CasRef {
return CAS_REF_PATTERN.test(value);
}
function isRecord(value: unknown): value is Record<string, unknown> {
return typeof value === "object" && value !== null && !Array.isArray(value);
}
function isRoleDefinition(value: unknown): boolean {
if (!isRecord(value)) {
return false;
}
const outputSchema = value.outputSchema;
const schemaOk =
typeof outputSchema === "string" ||
(isRecord(outputSchema) && typeof outputSchema.type === "string");
return (
typeof value.description === "string" && typeof value.systemPrompt === "string" && schemaOk
);
}
function isConditionDefinition(value: unknown): boolean {
if (!isRecord(value)) {
return false;
}
return typeof value.description === "string" && typeof value.expression === "string";
}
function isTransition(value: unknown): boolean {
if (!isRecord(value)) {
return false;
}
const condition = value.condition;
return typeof value.role === "string" && (condition === null || typeof condition === "string");
}
function isStringRecord(value: unknown, itemCheck: (item: unknown) => boolean): boolean {
if (!isRecord(value)) {
return false;
}
return Object.values(value).every(itemCheck);
}
function isGraph(value: unknown): boolean {
if (!isRecord(value)) {
return false;
}
return Object.values(value).every(
(transitions) => Array.isArray(transitions) && transitions.every((t) => isTransition(t)),
);
}
/** Validate YAML-parsed workflow document shape (outputSchema may be inline JSON Schema). */
export function parseWorkflowPayload(raw: unknown): WorkflowPayload | null {
if (!isRecord(raw)) {
return null;
}
if (typeof raw.name !== "string" || typeof raw.description !== "string") {
return null;
}
if (
!isStringRecord(raw.roles, isRoleDefinition) ||
!isStringRecord(raw.conditions, isConditionDefinition) ||
!isGraph(raw.graph)
) {
return null;
}
return raw as WorkflowPayload;
}
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{
"extends": "../../tsconfig.json",
"compilerOptions": {
"rootDir": "src",
"outDir": "dist"
},
"include": ["src"],
"references": [
{ "path": "../uwf-protocol" },
{ "path": "../uwf-moderator" },
{ "path": "../uwf-agent-kit" }
]
}
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{
"name": "@uncaged/uwf-agent-hermes",
"version": "0.1.0",
"files": [
"src",
"dist",
"package.json"
],
"type": "module",
"bin": {
"uwf-hermes": "./src/cli.ts"
},
"exports": {
".": {
"bun": "./src/index.ts",
"types": "./dist/index.d.ts",
"import": "./dist/index.js"
}
},
"scripts": {
"test": "bun test"
},
"dependencies": {
"@uncaged/uwf-agent-kit": "workspace:^"
},
"devDependencies": {
"typescript": "^5.8.3"
},
"publishConfig": {
"access": "public"
}
}
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#!/usr/bin/env bun
import { createHermesAgent } from "./hermes.js";
const main = createHermesAgent();
void main();
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import { spawn } from "node:child_process";
import { type AgentContext, createAgent } from "@uncaged/uwf-agent-kit";
const HERMES_COMMAND = "hermes";
const HERMES_MAX_TURNS = 90;
function buildHistorySummary(history: AgentContext["history"]): string {
if (history.length === 0) {
return "";
}
const lines: string[] = ["## Previous Steps"];
for (let i = 0; i < history.length; i++) {
const step = history[i];
if (step === undefined) {
continue;
}
lines.push("");
lines.push(`### Step ${i + 1}: ${step.role}`);
lines.push(`Output: ${JSON.stringify(step.output)}`);
lines.push(`Agent: ${step.agent}`);
}
return lines.join("\n");
}
/** Assemble system prompt, task, and prior step outputs for Hermes. */
export function buildHermesPrompt(ctx: AgentContext): string {
const parts: string[] = [ctx.systemPrompt, "", "## Task", ctx.prompt];
const historyBlock = buildHistorySummary(ctx.history);
if (historyBlock !== "") {
parts.push("", historyBlock);
}
return parts.join("\n");
}
function spawnHermesChat(prompt: string): Promise<string> {
return new Promise((resolve, reject) => {
const args = [
"chat",
"-q",
prompt,
"--yolo",
"--max-turns",
String(HERMES_MAX_TURNS),
"--quiet",
];
const child = spawn(HERMES_COMMAND, args, {
env: process.env,
shell: false,
stdio: ["ignore", "pipe", "pipe"],
});
let stdout = "";
let stderr = "";
child.stdout?.on("data", (chunk: Buffer) => {
stdout += chunk.toString();
});
child.stderr?.on("data", (chunk: Buffer) => {
stderr += chunk.toString();
});
child.on("error", (cause) => {
const message = cause instanceof Error ? cause.message : String(cause);
reject(new Error(`hermes spawn failed: ${message}`));
});
child.on("close", (code) => {
if (code === 0) {
resolve(stdout);
return;
}
const detail = stderr.trim() !== "" ? ` stderr=${stderr.trim()}` : "";
reject(new Error(`hermes exited with code ${code ?? "null"}${detail}`));
});
});
}
async function runHermes(ctx: AgentContext): Promise<string> {
const fullPrompt = buildHermesPrompt(ctx);
return spawnHermesChat(fullPrompt);
}
/** Agent CLI factory: parses argv, runs Hermes, extracts output, writes StepNode. */
export function createHermesAgent(): () => Promise<void> {
return createAgent({
name: "hermes",
run: runHermes,
});
}
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export { buildHermesPrompt, createHermesAgent } from "./hermes.js";
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{
"extends": "../../tsconfig.json",
"compilerOptions": {
"rootDir": "src",
"outDir": "dist"
},
"include": ["src"],
"references": [{ "path": "../uwf-agent-kit" }]
}
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import { describe, expect, test } from "bun:test";
import type { WorkflowConfig } from "@uncaged/uwf-protocol";
import { resolveExtractModelAlias } from "../src/extract.js";
function baseConfig(overrides: Partial<WorkflowConfig> = {}): WorkflowConfig {
return {
providers: {},
models: {
sonnet: { provider: "openrouter", name: "anthropic/claude-sonnet-4" },
"gpt4o-mini": { provider: "openai", name: "gpt-4o-mini" },
},
agents: {},
defaultAgent: "hermes",
agentOverrides: null,
defaultModel: "sonnet",
modelOverrides: null,
...overrides,
};
}
describe("resolveExtractModelAlias", () => {
test("uses modelOverrides.extract when set", () => {
const config = baseConfig({
modelOverrides: { extract: "gpt4o-mini" },
});
expect(resolveExtractModelAlias(config)).toBe("gpt4o-mini");
});
test("falls back to models.extract alias when present", () => {
const config = baseConfig({
models: {
extract: { provider: "openai", name: "gpt-4o-mini" },
sonnet: { provider: "openrouter", name: "anthropic/claude-sonnet-4" },
},
});
expect(resolveExtractModelAlias(config)).toBe("extract");
});
test("falls back to defaultModel", () => {
expect(resolveExtractModelAlias(baseConfig())).toBe("sonnet");
});
});
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{
"name": "@uncaged/uwf-agent-kit",
"version": "0.1.0",
"files": [
"src",
"dist",
"package.json"
],
"type": "module",
"exports": {
".": {
"bun": "./src/index.ts",
"types": "./dist/index.d.ts",
"import": "./dist/index.js"
}
},
"scripts": {
"test": "bun test"
},
"dependencies": {
"@uncaged/json-cas": "workspace:^",
"@uncaged/json-cas-fs": "workspace:^",
"@uncaged/uwf-protocol": "workspace:^",
"dotenv": "^16.6.1",
"yaml": "^2.8.4"
},
"devDependencies": {
"typescript": "^5.8.3"
},
"publishConfig": {
"access": "public"
}
}
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import type {
CasRef,
StartNodePayload,
StepContext,
StepNodePayload,
ThreadId,
} from "@uncaged/uwf-protocol";
import { createAgentStore, loadThreadsIndex, resolveStorageRoot } from "./storage.js";
import type { AgentContext } from "./types.js";
type ChainState = {
startHash: CasRef;
start: StartNodePayload;
stepsNewestFirst: StepNodePayload[];
headIsStart: boolean;
};
function fail(message: string): never {
throw new Error(message);
}
function walkChain(
store: Awaited<ReturnType<typeof createAgentStore>>["store"],
schemas: Awaited<ReturnType<typeof createAgentStore>>["schemas"],
headHash: CasRef,
): ChainState {
const headNode = store.get(headHash);
if (headNode === null) {
fail(`CAS node not found: ${headHash}`);
}
if (headNode.type === schemas.startNode) {
return {
startHash: headHash,
start: headNode.payload as StartNodePayload,
stepsNewestFirst: [],
headIsStart: true,
};
}
if (headNode.type !== schemas.stepNode) {
fail(`head ${headHash} is not a StartNode or StepNode`);
}
const stepsNewestFirst: StepNodePayload[] = [];
let hash: CasRef | null = headHash;
while (hash !== null) {
const node = store.get(hash);
if (node === null) {
fail(`CAS node not found while walking chain: ${hash}`);
}
if (node.type !== schemas.stepNode) {
break;
}
const payload = node.payload as StepNodePayload;
stepsNewestFirst.push(payload);
hash = payload.prev;
}
const newest = stepsNewestFirst[0];
if (newest === undefined) {
fail(`empty step chain at head ${headHash}`);
}
const startNode = store.get(newest.start);
if (startNode === null || startNode.type !== schemas.startNode) {
fail(`StartNode not found: ${newest.start}`);
}
return {
startHash: newest.start,
start: startNode.payload as StartNodePayload,
stepsNewestFirst,
headIsStart: false,
};
}
function expandOutput(
store: Awaited<ReturnType<typeof createAgentStore>>["store"],
outputRef: CasRef,
): unknown {
const node = store.get(outputRef);
if (node === null) {
return {};
}
return node.payload;
}
async function buildHistory(
store: Awaited<ReturnType<typeof createAgentStore>>["store"],
stepsNewestFirst: StepNodePayload[],
): Promise<StepContext[]> {
const chronological = [...stepsNewestFirst].reverse();
const history: StepContext[] = [];
for (const step of chronological) {
history.push({
role: step.role,
output: expandOutput(store, step.output),
detail: step.detail,
agent: step.agent,
});
}
return history;
}
async function loadWorkflow(
store: Awaited<ReturnType<typeof createAgentStore>>["store"],
schemas: Awaited<ReturnType<typeof createAgentStore>>["schemas"],
workflowRef: CasRef,
) {
const node = store.get(workflowRef);
if (node === null) {
fail(`workflow CAS node not found: ${workflowRef}`);
}
if (node.type !== schemas.workflow) {
fail(`node ${workflowRef} is not a Workflow`);
}
return node.payload as AgentContext["workflow"];
}
/**
* Build agent execution context from thread head in threads.yaml.
* Walks the CAS chain from head to StartNode and expands step outputs.
*/
export async function buildContext(threadId: ThreadId, role: string): Promise<AgentContext> {
const storageRoot = resolveStorageRoot();
const agentStore = await createAgentStore(storageRoot);
const { store, schemas } = agentStore;
const index = await loadThreadsIndex(storageRoot);
const headHash = index[threadId];
if (headHash === undefined) {
fail(`thread not found in threads.yaml: ${threadId}`);
}
const chain = walkChain(store, schemas, headHash);
const workflow = await loadWorkflow(store, schemas, chain.start.workflow);
const roleDef = workflow.roles[role];
if (roleDef === undefined) {
fail(`unknown role "${role}" in workflow "${workflow.name}"`);
}
const history = await buildHistory(store, chain.stepsNewestFirst);
return {
threadId,
role,
systemPrompt: roleDef.systemPrompt,
prompt: chain.start.prompt,
history,
workflow,
};
}
export type BuildContextMeta = {
storageRoot: string;
store: Awaited<ReturnType<typeof createAgentStore>>["store"];
schemas: Awaited<ReturnType<typeof createAgentStore>>["schemas"];
headHash: CasRef;
chain: ChainState;
};
/**
* Same as {@link buildContext} but also returns chain metadata for writing the next StepNode.
*/
export async function buildContextWithMeta(
threadId: ThreadId,
role: string,
): Promise<AgentContext & { meta: BuildContextMeta }> {
const storageRoot = resolveStorageRoot();
const agentStore = await createAgentStore(storageRoot);
const { store, schemas } = agentStore;
const index = await loadThreadsIndex(storageRoot);
const headHash = index[threadId];
if (headHash === undefined) {
fail(`thread not found in threads.yaml: ${threadId}`);
}
const chain = walkChain(store, schemas, headHash);
const workflow = await loadWorkflow(store, schemas, chain.start.workflow);
const roleDef = workflow.roles[role];
if (roleDef === undefined) {
fail(`unknown role "${role}" in workflow "${workflow.name}"`);
}
const history = await buildHistory(store, chain.stepsNewestFirst);
return {
threadId,
role,
systemPrompt: roleDef.systemPrompt,
prompt: chain.start.prompt,
history,
workflow,
meta: { storageRoot, store, schemas, headHash, chain },
};
}
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import { getSchema, validate } from "@uncaged/json-cas";
import type { CasRef, ModelAlias, WorkflowConfig } from "@uncaged/uwf-protocol";
import { config as loadDotenv } from "dotenv";
import { createAgentStore, getEnvPath, resolveStorageRoot } from "./storage.js";
export type ResolvedLlmProvider = {
baseUrl: string;
apiKey: string;
model: string;
};
function isRecord(value: unknown): value is Record<string, unknown> {
return typeof value === "object" && value !== null && !Array.isArray(value);
}
/** Resolve model alias for extract: modelOverrides.extract → models.extract → defaultModel. */
export function resolveExtractModelAlias(config: WorkflowConfig): ModelAlias {
const fromOverride = config.modelOverrides?.extract ?? null;
if (fromOverride !== null) {
return fromOverride;
}
if (config.models.extract !== undefined) {
return "extract";
}
if (config.models.default !== undefined) {
return "default";
}
return config.defaultModel;
}
export function resolveModel(config: WorkflowConfig, alias: ModelAlias): ResolvedLlmProvider {
const modelEntry = config.models[alias];
if (modelEntry === undefined) {
throw new Error(`unknown model alias: ${alias}`);
}
const providerEntry = config.providers[modelEntry.provider];
if (providerEntry === undefined) {
throw new Error(`unknown provider "${modelEntry.provider}" for model "${alias}"`);
}
const apiKey = process.env[providerEntry.apiKeyEnv];
if (apiKey === undefined || apiKey === "") {
throw new Error(`missing API key env var: ${providerEntry.apiKeyEnv}`);
}
return {
baseUrl: providerEntry.baseUrl,
apiKey,
model: modelEntry.name,
};
}
function chatUrl(baseUrl: string): string {
const trimmed = baseUrl.replace(/\/+$/, "");
return `${trimmed}/chat/completions`;
}
function extractJsonFromAssistantText(text: string): unknown {
const trimmed = text.trim();
const fenceMatch = /^```(?:json)?\s*([\s\S]*?)```$/m.exec(trimmed);
const candidate = fenceMatch !== null ? fenceMatch[1].trim() : trimmed;
return JSON.parse(candidate) as unknown;
}
function parseAssistantText(parsed: unknown): string {
if (!isRecord(parsed)) {
throw new Error("LLM response is not an object");
}
const choices = parsed.choices;
if (!Array.isArray(choices) || choices.length === 0) {
throw new Error("LLM response has no choices");
}
const c0 = choices[0];
if (!isRecord(c0)) {
throw new Error("LLM choice is not an object");
}
const messageObj = c0.message;
if (!isRecord(messageObj)) {
throw new Error("LLM message is not an object");
}
const content = messageObj.content;
if (typeof content !== "string") {
throw new Error("LLM message has no text content");
}
return content;
}
async function chatCompletionText(
provider: ResolvedLlmProvider,
messages: Array<{ role: "system" | "user"; content: string }>,
): Promise<string> {
let response: Response;
try {
response = await fetch(chatUrl(provider.baseUrl), {
method: "POST",
headers: {
Authorization: `Bearer ${provider.apiKey}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
model: provider.model,
messages,
response_format: { type: "json_object" },
}),
});
} catch (cause) {
const message = cause instanceof Error ? cause.message : String(cause);
throw new Error(`LLM network error: ${message}`);
}
const responseText = await response.text();
if (!response.ok) {
throw new Error(`LLM HTTP ${response.status}: ${responseText.slice(0, 2000)}`);
}
let parsed: unknown;
try {
parsed = JSON.parse(responseText) as unknown;
} catch (cause) {
const message = cause instanceof Error ? cause.message : String(cause);
throw new Error(`LLM invalid JSON response: ${message}`);
}
return parseAssistantText(parsed);
}
export type ExtractResult = {
value: unknown;
hash: CasRef;
};
/**
* Call an OpenAI-compatible LLM to extract structured output matching outputSchema.
* Loads config.yaml and .env from the workflow storage root.
*/
export async function extract(
rawOutput: string,
outputSchema: CasRef,
config: WorkflowConfig,
): Promise<ExtractResult> {
const storageRoot = resolveStorageRoot();
loadDotenv({ path: getEnvPath(storageRoot) });
const { store } = await createAgentStore(storageRoot);
const schema = getSchema(store, outputSchema);
if (schema === null) {
throw new Error(`output schema not found in CAS: ${outputSchema}`);
}
const modelAlias = resolveExtractModelAlias(config);
const provider = resolveModel(config, modelAlias);
const schemaText = JSON.stringify(schema, null, 2);
const assistantText = await chatCompletionText(provider, [
{
role: "system",
content:
"Extract structured data from the agent output. Reply with a single JSON object only, no markdown or prose. The JSON must validate against this JSON Schema:\n" +
schemaText,
},
{
role: "user",
content: rawOutput,
},
]);
let structured: unknown;
try {
structured = extractJsonFromAssistantText(assistantText);
} catch (cause) {
const message = cause instanceof Error ? cause.message : String(cause);
throw new Error(`failed to parse extracted JSON: ${message}`);
}
const outputHash = await store.put(outputSchema, structured);
const node = store.get(outputHash);
if (node === null || !validate(store, node)) {
throw new Error("extracted output failed JSON Schema validation");
}
return { value: structured, hash: outputHash };
}
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export type { BuildContextMeta } from "./context.js";
export { buildContext, buildContextWithMeta } from "./context.js";
export { getConfigPath, getEnvPath, loadWorkflowConfig } from "./storage.js";
export type { ExtractResult, ResolvedLlmProvider } from "./extract.js";
export {
extract,
resolveExtractModelAlias,
resolveModel,
} from "./extract.js";
export { createAgent } from "./run.js";
export type { AgentContext, AgentOptions, AgentRunFn } from "./types.js";
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import { validate } from "@uncaged/json-cas";
import type { CasRef, StepNodePayload, ThreadId } from "@uncaged/uwf-protocol";
import { config as loadDotenv } from "dotenv";
import { buildContextWithMeta } from "./context.js";
import { extract } from "./extract.js";
import type { AgentStore } from "./storage.js";
import { getEnvPath, loadWorkflowConfig, resolveStorageRoot } from "./storage.js";
import type { AgentContext, AgentOptions } from "./types.js";
function fail(message: string): never {
process.stderr.write(`${message}\n`);
process.exit(1);
}
function agentLabel(name: string): string {
if (name.startsWith("uwf-")) {
return name;
}
return `uwf-${name}`;
}
function parseArgv(argv: string[]): { threadId: ThreadId; role: string } {
const threadId = argv[2];
const role = argv[3];
if (threadId === undefined || threadId === "") {
fail("usage: <agent-cli> <thread-id> <role>");
}
if (role === undefined || role === "") {
fail("usage: <agent-cli> <thread-id> <role>");
}
return { threadId: threadId as ThreadId, role };
}
function runWithMessage<T>(label: string, fn: () => Promise<T>): Promise<T> {
return fn().catch((e: unknown) => {
const message = e instanceof Error ? e.message : String(e);
fail(`${label}: ${message}`);
});
}
async function writeStepNode(options: {
store: AgentStore["store"];
schemas: AgentStore["schemas"];
startHash: CasRef;
prevHash: CasRef | null;
role: string;
outputHash: CasRef;
detailHash: CasRef;
agentName: string;
}): Promise<CasRef> {
const payload: StepNodePayload = {
start: options.startHash,
prev: options.prevHash,
role: options.role,
output: options.outputHash,
detail: options.detailHash,
agent: options.agentName,
};
const hash = await options.store.put(options.schemas.stepNode, payload);
const node = options.store.get(hash);
if (node === null || !validate(options.store, node)) {
fail("stored StepNode failed schema validation");
}
return hash;
}
async function runAgent(options: AgentOptions, ctx: AgentContext): Promise<string> {
return runWithMessage("agent run failed", () => options.run(ctx));
}
async function extractOutput(
rawOutput: string,
outputSchema: CasRef,
storageRoot: string,
): Promise<CasRef> {
const config = await runWithMessage("failed to load config", () =>
loadWorkflowConfig(storageRoot),
);
const extracted = await runWithMessage("extract failed", () =>
extract(rawOutput, outputSchema, config),
);
return extracted.hash;
}
async function persistStep(options: {
ctx: Awaited<ReturnType<typeof buildContextWithMeta>>;
rawOutput: string;
outputHash: CasRef;
agentName: string;
}): Promise<CasRef> {
const { store, schemas, chain, headHash } = options.ctx.meta;
const detailHash = await store.put(null, options.rawOutput);
return writeStepNode({
store,
schemas,
startHash: chain.startHash,
prevHash: chain.headIsStart ? null : headHash,
role: options.ctx.role,
outputHash: options.outputHash,
detailHash,
agentName: options.agentName,
});
}
/**
* Create an agent CLI entrypoint.
* Parses argv (`<thread-id> <role>`), runs the agent, extracts structured output,
* writes StepNode to CAS, and prints the new node hash to stdout.
*/
export function createAgent(options: AgentOptions): () => Promise<void> {
return async function main(): Promise<void> {
const { threadId, role } = parseArgv(process.argv);
const storageRoot = resolveStorageRoot();
loadDotenv({ path: getEnvPath(storageRoot) });
const ctx = await runWithMessage("context", () => buildContextWithMeta(threadId, role));
const roleDef = ctx.workflow.roles[role];
if (roleDef === undefined) {
fail(`unknown role: ${role}`);
}
const rawOutput = await runAgent(options, ctx);
const outputHash = await extractOutput(rawOutput, roleDef.outputSchema, storageRoot);
const stepHash = await persistStep({
ctx,
rawOutput,
outputHash,
agentName: agentLabel(options.name),
});
process.stdout.write(`${stepHash}\n`);
};
}
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import type { Hash, Store } from "@uncaged/json-cas";
import { putSchema } from "@uncaged/json-cas";
import {
START_NODE_SCHEMA,
STEP_NODE_SCHEMA,
WORKFLOW_SCHEMA,
} from "@uncaged/uwf-protocol";
export type UwfAgentSchemaHashes = {
workflow: Hash;
startNode: Hash;
stepNode: Hash;
};
/**
* Register Workflow, StartNode, and StepNode JSON Schemas in the CAS store.
* Idempotent: safe to call on every agent invocation.
*/
export async function registerAgentSchemas(store: Store): Promise<UwfAgentSchemaHashes> {
const [workflow, startNode, stepNode] = await Promise.all([
putSchema(store, WORKFLOW_SCHEMA),
putSchema(store, START_NODE_SCHEMA),
putSchema(store, STEP_NODE_SCHEMA),
]);
return { workflow, startNode, stepNode };
}
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import { readFile } from "node:fs/promises";
import { homedir } from "node:os";
import { join } from "node:path";
import type { Store } from "@uncaged/json-cas";
import { createFsStore } from "@uncaged/json-cas-fs";
import type {
AgentAlias,
AgentConfig,
ModelAlias,
ModelConfig,
ProviderAlias,
ProviderConfig,
Scenario,
ThreadId,
ThreadsIndex,
WorkflowConfig,
WorkflowName,
} from "@uncaged/uwf-protocol";
import { parse } from "yaml";
import { registerAgentSchemas } from "./schemas.js";
/** Default filesystem root for uwf data (`~/.uncaged/workflow`). */
export function getDefaultStorageRoot(): string {
return join(homedir(), ".uncaged", "workflow");
}
/**
* Resolve storage root.
* Priority: `UNCAGED_WORKFLOW_STORAGE_ROOT` → `WORKFLOW_STORAGE_ROOT` → default.
*/
export function resolveStorageRoot(): string {
const internal = process.env.UNCAGED_WORKFLOW_STORAGE_ROOT;
if (internal !== undefined && internal !== "") {
return internal;
}
const userOverride = process.env.WORKFLOW_STORAGE_ROOT;
if (userOverride !== undefined && userOverride !== "") {
return userOverride;
}
return getDefaultStorageRoot();
}
export function getCasDir(storageRoot: string): string {
return join(storageRoot, "cas");
}
export function getConfigPath(storageRoot: string): string {
return join(storageRoot, "config.yaml");
}
export function getEnvPath(storageRoot: string): string {
return join(storageRoot, ".env");
}
export function getThreadsPath(storageRoot: string): string {
return join(storageRoot, "threads.yaml");
}
export type AgentStore = {
storageRoot: string;
store: Store;
schemas: Awaited<ReturnType<typeof registerAgentSchemas>>;
};
export async function createAgentStore(storageRoot: string): Promise<AgentStore> {
const store = createFsStore(getCasDir(storageRoot));
const schemas = await registerAgentSchemas(store);
return { storageRoot, store, schemas };
}
function isRecord(value: unknown): value is Record<string, unknown> {
return typeof value === "object" && value !== null && !Array.isArray(value);
}
function normalizeProviders(raw: unknown): Record<ProviderAlias, ProviderConfig> {
if (!isRecord(raw)) {
throw new Error("config.providers must be a mapping");
}
const providers: Record<ProviderAlias, ProviderConfig> = {};
for (const [name, entry] of Object.entries(raw)) {
if (!isRecord(entry)) {
throw new Error(`config.providers.${name} must be a mapping`);
}
const baseUrl = entry.baseUrl;
const apiKeyEnv = entry.apiKeyEnv;
if (typeof baseUrl !== "string" || typeof apiKeyEnv !== "string") {
throw new Error(`config.providers.${name} requires baseUrl and apiKeyEnv`);
}
providers[name] = { baseUrl, apiKeyEnv };
}
return providers;
}
function normalizeModels(raw: unknown): Record<ModelAlias, ModelConfig> {
if (!isRecord(raw)) {
throw new Error("config.models must be a mapping");
}
const models: Record<ModelAlias, ModelConfig> = {};
for (const [name, entry] of Object.entries(raw)) {
if (!isRecord(entry)) {
throw new Error(`config.models.${name} must be a mapping`);
}
const provider = entry.provider;
const modelName = entry.name;
if (typeof provider !== "string" || typeof modelName !== "string") {
throw new Error(`config.models.${name} requires provider and name`);
}
models[name] = { provider, name: modelName };
}
return models;
}
function normalizeAgents(raw: unknown): Record<AgentAlias, AgentConfig> {
if (!isRecord(raw)) {
throw new Error("config.agents must be a mapping");
}
const agents: Record<AgentAlias, AgentConfig> = {};
for (const [name, entry] of Object.entries(raw)) {
if (!isRecord(entry)) {
throw new Error(`config.agents.${name} must be a mapping`);
}
const command = entry.command;
const argsRaw = entry.args;
if (typeof command !== "string") {
throw new Error(`config.agents.${name} requires command`);
}
const args = Array.isArray(argsRaw)
? argsRaw.filter((a): a is string => typeof a === "string")
: [];
agents[name] = { command, args };
}
return agents;
}
function normalizeModelOverrides(raw: unknown): Record<Scenario, ModelAlias> | null {
if (raw === undefined || raw === null) {
return null;
}
if (!isRecord(raw)) {
throw new Error("config.modelOverrides must be a mapping or null");
}
const overrides: Record<Scenario, ModelAlias> = {};
for (const [scene, alias] of Object.entries(raw)) {
if (typeof alias === "string") {
overrides[scene] = alias;
}
}
return overrides;
}
function normalizeAgentOverrides(
raw: unknown,
): Record<WorkflowName, Record<string, AgentAlias>> | null {
if (raw === undefined || raw === null) {
return null;
}
if (!isRecord(raw)) {
throw new Error("config.agentOverrides must be a mapping or null");
}
const overrides: Record<WorkflowName, Record<string, AgentAlias>> = {};
for (const [workflowName, rolesRaw] of Object.entries(raw)) {
if (!isRecord(rolesRaw)) {
continue;
}
const roles: Record<string, AgentAlias> = {};
for (const [roleName, alias] of Object.entries(rolesRaw)) {
if (typeof alias === "string") {
roles[roleName] = alias;
}
}
overrides[workflowName] = roles;
}
return overrides;
}
export function normalizeWorkflowConfig(raw: unknown): WorkflowConfig {
if (!isRecord(raw)) {
throw new Error("config.yaml root must be a mapping");
}
const defaultAgent = raw.defaultAgent;
const defaultModel = raw.defaultModel;
if (typeof defaultAgent !== "string" || typeof defaultModel !== "string") {
throw new Error("config requires defaultAgent and defaultModel");
}
return {
providers: normalizeProviders(raw.providers),
models: normalizeModels(raw.models),
agents: normalizeAgents(raw.agents),
defaultAgent,
agentOverrides: normalizeAgentOverrides(raw.agentOverrides),
defaultModel,
modelOverrides: normalizeModelOverrides(raw.modelOverrides),
};
}
export async function loadWorkflowConfig(storageRoot: string): Promise<WorkflowConfig> {
const path = getConfigPath(storageRoot);
const text = await readFile(path, "utf8");
const raw = parse(text) as unknown;
return normalizeWorkflowConfig(raw);
}
export async function loadThreadsIndex(storageRoot: string): Promise<ThreadsIndex> {
const path = getThreadsPath(storageRoot);
try {
const text = await readFile(path, "utf8");
const raw = parse(text) as unknown;
if (!isRecord(raw)) {
return {};
}
const index: ThreadsIndex = {};
for (const [threadId, head] of Object.entries(raw)) {
if (typeof head === "string") {
index[threadId as ThreadId] = head;
}
}
return index;
} catch (e) {
const err = e as NodeJS.ErrnoException;
if (err.code === "ENOENT") {
return {};
}
throw e;
}
}
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import type { StepContext, ThreadId, WorkflowPayload } from "@uncaged/uwf-protocol";
export type AgentContext = {
threadId: ThreadId;
role: string;
systemPrompt: string;
prompt: string;
history: StepContext[];
workflow: WorkflowPayload;
};
export type AgentRunFn = (ctx: AgentContext) => Promise<string>;
export type AgentOptions = {
name: string;
run: AgentRunFn;
};
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{
"extends": "../../tsconfig.json",
"compilerOptions": {
"rootDir": "src",
"outDir": "dist"
},
"include": ["src"],
"references": [{ "path": "../uwf-protocol" }]
}
@@ -0,0 +1,120 @@
import { describe, expect, test } from "bun:test";
import type { ModeratorContext, WorkflowPayload } from "@uncaged/uwf-protocol";
import { evaluate } from "../src/evaluate.js";
const solveIssueWorkflow: WorkflowPayload = {
name: "solve-issue",
description: "End-to-end issue resolution",
roles: {
planner: {
description: "Creates implementation plan",
systemPrompt: "You are a planning agent...",
outputSchema: "5GWKR8TN1V3JA",
},
developer: {
description: "Implements code changes",
systemPrompt: "You are a developer agent...",
outputSchema: "8CNWT4KR6D1HV",
},
reviewer: {
description: "Reviews code changes",
systemPrompt: "You are a code reviewer...",
outputSchema: "1VPBG9SM5E7WK",
},
},
conditions: {
needsClarification: {
description: "Planner requests clarification from user",
expression: "$exists(steps[-1].output.needsClarification)",
},
notApproved: {
description: "Reviewer rejected the implementation",
expression: "steps[-1].output.approved = false",
},
},
graph: {
$START: [{ role: "planner", condition: null }],
planner: [
{ role: "developer", condition: "needsClarification" },
{ role: "$END", condition: null },
],
developer: [{ role: "reviewer", condition: null }],
reviewer: [
{ role: "developer", condition: "notApproved" },
{ role: "$END", condition: null },
],
},
};
function makeContext(steps: ModeratorContext["steps"]): ModeratorContext {
return {
start: {
workflow: "4KNM2PXR3B1QW",
prompt: "Fix the login bug",
},
steps,
};
}
describe("evaluate", () => {
test("$START → first role (fallback)", async () => {
const result = await evaluate(solveIssueWorkflow, makeContext([]));
expect(result).toEqual({ ok: true, value: "planner" });
});
test("condition match (notApproved → developer)", async () => {
const context = makeContext([
{
role: "reviewer",
output: { approved: false },
detail: "2MXBG6PN4A8JR",
agent: "uwf-hermes",
},
]);
const result = await evaluate(solveIssueWorkflow, context);
expect(result).toEqual({ ok: true, value: "developer" });
});
test("fallback when condition does not match → $END", async () => {
const context = makeContext([
{
role: "reviewer",
output: { approved: true },
detail: "2MXBG6PN4A8JR",
agent: "uwf-hermes",
},
]);
const result = await evaluate(solveIssueWorkflow, context);
expect(result).toEqual({ ok: true, value: "$END" });
});
test("missing role in graph → error", async () => {
const context = makeContext([
{
role: "unknown-role",
output: {},
detail: "2MXBG6PN4A8JR",
agent: "uwf-hermes",
},
]);
const result = await evaluate(solveIssueWorkflow, context);
expect(result.ok).toBe(false);
if (!result.ok) {
expect(result.error.message).toBe('no transitions defined for role "unknown-role"');
}
});
test("output expansion in context works with JSONata", async () => {
const context = makeContext([
{
role: "planner",
output: { needsClarification: true },
detail: "7BQST3VW9F2MA",
agent: "uwf-hermes",
},
]);
const result = await evaluate(solveIssueWorkflow, context);
expect(result).toEqual({ ok: true, value: "developer" });
});
});
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{
"name": "@uncaged/uwf-moderator",
"version": "0.1.0",
"files": [
"src",
"dist",
"package.json"
],
"type": "module",
"exports": {
".": {
"bun": "./src/index.ts",
"types": "./dist/index.d.ts",
"import": "./dist/index.js"
}
},
"scripts": {
"test": "bun test"
},
"dependencies": {
"@uncaged/uwf-protocol": "workspace:^",
"jsonata": "^1.8.7"
},
"devDependencies": {
"typescript": "^5.8.3"
},
"publishConfig": {
"access": "public"
}
}
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import type { ModeratorContext, WorkflowPayload } from "@uncaged/uwf-protocol";
import jsonata from "jsonata";
import type { Result } from "./types.js";
const START_ROLE = "$START";
function isTruthy(value: unknown): boolean {
if (value === null || value === undefined) {
return false;
}
if (typeof value === "boolean") {
return value;
}
if (typeof value === "number") {
return value !== 0 && !Number.isNaN(value);
}
if (typeof value === "string") {
return value.length > 0;
}
return true;
}
async function evaluateJsonata(expression: string, context: ModeratorContext): Promise<Result<unknown, Error>> {
try {
const result = await jsonata(expression).evaluate(context);
return { ok: true, value: result };
} catch (error) {
return {
ok: false,
error: error instanceof Error ? error : new Error(String(error)),
};
}
}
function currentRole(context: ModeratorContext): string {
if (context.steps.length === 0) {
return START_ROLE;
}
return context.steps[context.steps.length - 1].role;
}
export async function evaluate(
workflow: WorkflowPayload,
context: ModeratorContext,
): Promise<Result<string, Error>> {
const role = currentRole(context);
const transitions = workflow.graph[role];
if (transitions === undefined) {
return {
ok: false,
error: new Error(`no transitions defined for role "${role}"`),
};
}
for (const transition of transitions) {
if (transition.condition === null) {
return { ok: true, value: transition.role };
}
const conditionDef = workflow.conditions[transition.condition];
if (conditionDef === undefined) {
return {
ok: false,
error: new Error(`unknown condition "${transition.condition}"`),
};
}
const evalResult = await evaluateJsonata(conditionDef.expression, context);
if (!evalResult.ok) {
return evalResult;
}
if (isTruthy(evalResult.value)) {
return { ok: true, value: transition.role };
}
}
return {
ok: false,
error: new Error(`no transition matched for role "${role}"`),
};
}
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export { evaluate } from "./evaluate.js";
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export type Result<T, E> = { ok: true; value: T } | { ok: false; error: E };
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{
"extends": "../../tsconfig.json",
"compilerOptions": {
"rootDir": "src",
"outDir": "dist"
},
"include": ["src"],
"references": [{ "path": "../uwf-protocol" }]
}
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{
"name": "@uncaged/uwf-protocol",
"version": "0.1.0",
"files": [
"src",
"dist",
"package.json"
],
"type": "module",
"exports": {
".": {
"bun": "./src/index.ts",
"types": "./dist/index.d.ts",
"import": "./dist/index.js"
}
},
"dependencies": {
"@uncaged/json-cas": "workspace:^"
},
"devDependencies": {
"typescript": "^5.8.3"
},
"publishConfig": {
"access": "public"
}
}
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export {
START_NODE_SCHEMA,
STEP_NODE_SCHEMA,
WORKFLOW_SCHEMA,
} from "./schemas.js";
export type {
AgentAlias,
AgentConfig,
CasRef,
ConditionDefinition,
ModelAlias,
ModelConfig,
ModeratorContext,
ProviderAlias,
ProviderConfig,
RoleDefinition,
RoleName,
Scenario,
StartNodePayload,
StartOutput,
StepContext,
StepNodePayload,
StepOutput,
StepRecord,
ThreadId,
ThreadListItem,
ThreadsIndex,
Transition,
WorkflowConfig,
WorkflowName,
WorkflowPayload,
} from "./types.js";
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import type { JSONSchema } from "@uncaged/json-cas";
const ROLE_DEFINITION: JSONSchema = {
type: "object",
required: ["description", "systemPrompt", "outputSchema"],
properties: {
description: { type: "string" },
systemPrompt: { type: "string" },
outputSchema: { type: "string", format: "cas_ref" },
},
additionalProperties: false,
};
const CONDITION_DEFINITION: JSONSchema = {
type: "object",
required: ["description", "expression"],
properties: {
description: { type: "string" },
expression: { type: "string" },
},
additionalProperties: false,
};
const TRANSITION: JSONSchema = {
type: "object",
required: ["role", "condition"],
properties: {
role: { type: "string" },
condition: { anyOf: [{ type: "string" }, { type: "null" }] },
},
additionalProperties: false,
};
export const WORKFLOW_SCHEMA: JSONSchema = {
type: "object",
required: ["name", "description", "roles", "conditions", "graph"],
properties: {
name: { type: "string" },
description: { type: "string" },
roles: {
type: "object",
additionalProperties: ROLE_DEFINITION,
},
conditions: {
type: "object",
additionalProperties: CONDITION_DEFINITION,
},
graph: {
type: "object",
additionalProperties: {
type: "array",
items: TRANSITION,
},
},
},
additionalProperties: false,
};
export const START_NODE_SCHEMA: JSONSchema = {
type: "object",
required: ["workflow", "prompt"],
properties: {
workflow: { type: "string", format: "cas_ref" },
prompt: { type: "string" },
},
additionalProperties: false,
};
export const STEP_NODE_SCHEMA: JSONSchema = {
type: "object",
required: ["start", "prev", "role", "output", "detail", "agent"],
properties: {
start: { type: "string", format: "cas_ref" },
prev: {
anyOf: [{ type: "string", format: "cas_ref" }, { type: "null" }],
},
role: { type: "string" },
output: { type: "string", format: "cas_ref" },
detail: { type: "string", format: "cas_ref" },
agent: { type: "string" },
},
additionalProperties: false,
};
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// ── 4.1 公共类型 ────────────────────────────────────────────────────
/** CAS hash — XXH64, 13-char Crockford Base32 */
export type CasRef = string;
/** Thread ID — ULID, 26-char Crockford Base32 */
export type ThreadId = string;
/** 一个 step 的核心数据,被 StepNode payload 和 JSONata 上下文共享 */
export type StepRecord = {
role: string;
output: CasRef;
detail: CasRef;
agent: string;
};
// ── 4.2 Workflow 定义 ───────────────────────────────────────────────
export type RoleDefinition = {
description: string;
systemPrompt: string;
outputSchema: CasRef;
};
export type Transition = {
role: string;
condition: string | null;
};
export type ConditionDefinition = {
description: string;
expression: string;
};
export type WorkflowPayload = {
name: string;
description: string;
roles: Record<string, RoleDefinition>;
conditions: Record<string, ConditionDefinition>;
graph: Record<string, Transition[]>;
};
// ── 4.3 Thread 节点 ─────────────────────────────────────────────────
export type StartNodePayload = {
workflow: CasRef;
prompt: string;
};
export type StepNodePayload = StepRecord & {
start: CasRef;
prev: CasRef | null;
};
// ── 4.4 JSONata 求值上下文 ──────────────────────────────────────────
/** JSONata 上下文中的 step — output 被展开 */
export type StepContext = Omit<StepRecord, "output"> & {
output: unknown;
};
export type ModeratorContext = {
start: StartNodePayload;
steps: StepContext[];
};
// ── 4.5 CLI 输出 ────────────────────────────────────────────────────
/** uwf thread start */
export type StartOutput = {
workflow: CasRef;
thread: ThreadId;
};
/** uwf thread step / uwf thread show */
export type StepOutput = {
workflow: CasRef;
thread: ThreadId;
head: CasRef;
done: boolean;
};
/** uwf thread list */
export type ThreadListItem = {
thread: ThreadId;
workflow: CasRef;
head: CasRef;
};
// ── 4.6 配置 ────────────────────────────────────────────────────────
/** Alias types for config references */
export type AgentAlias = string;
export type ModelAlias = string;
export type ProviderAlias = string;
export type WorkflowName = string;
export type RoleName = string;
export type Scenario = string;
export type ProviderConfig = {
baseUrl: string;
apiKeyEnv: string;
};
export type ModelConfig = {
provider: ProviderAlias;
name: string;
};
export type AgentConfig = {
command: string;
args: string[];
};
/** ~/.uncaged/workflow/config.yaml */
export type WorkflowConfig = {
providers: Record<ProviderAlias, ProviderConfig>;
models: Record<ModelAlias, ModelConfig>;
agents: Record<AgentAlias, AgentConfig>;
defaultAgent: AgentAlias;
agentOverrides: Record<WorkflowName, Record<RoleName, AgentAlias>> | null;
defaultModel: ModelAlias;
modelOverrides: Record<Scenario, ModelAlias> | null;
};
/** ~/.uncaged/workflow/threads.yaml */
export type ThreadsIndex = Record<ThreadId, CasRef>;
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{
"extends": "../../tsconfig.json",
"compilerOptions": {
"rootDir": "src",
"outDir": "dist"
},
"include": ["src"]
}