Initial CodeCraft: web-based coding harness for AI models

Rust backend (axum/tokio): agent loop with streaming, tools (fs, bash,
web_fetch, todo, ask_user, subagents, skills, craft snapshots/compare),
permissions with modes and rules, Anthropic + OpenAI-compatible providers,
MCP client (stdio/HTTP, elicitation), SQLite sessions, usage statistics,
compaction, commented TOML config editable via toml_edit.

React PWA: chat with live streaming, permission/question cards, modes
(build/plan/craft), settings for providers/models/prices/MCP/permissions,
raw config editor, statistics dashboard, i18n (en/de). Docker setup.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Richard ZinkandClaude Opus 5.5 committed 2026-11-08 14:39:24 +01:00
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import { useSyncExternalStore } from "react";
import { get } from "./api";
import type {
McpServerStatus,
Message,
Part,
PermissionRequest,
QuestionRequest,
ServerEvent,
Session,
} from "./types";
/** The assistant message currently being streamed. */
export interface Draft {
id: string;
parts: Part[];
}
export interface SessionError {
id: number;
message: string;
}
export interface State {
connected: boolean;
sessions: Session[];
/** Includes subagent sessions loaded on demand. */
sessionById: Record<string, Session>;
messages: Record<string, Message[]>;
drafts: Record<string, Draft | undefined>;
busy: Record<string, boolean>;
progress: Record<string, string>;
permissions: PermissionRequest[];
questions: QuestionRequest[];
errors: Record<string, SessionError[]>;
mcp: Record<string, McpServerStatus>;
}
let state: State = {
connected: false,
sessions: [],
sessionById: {},
messages: {},
drafts: {},
busy: {},
progress: {},
permissions: [],
questions: [],
errors: {},
mcp: {},
};
const listeners = new Set<() => void>();
export function setState(fn: (s: State) => Partial<State>) {
state = { ...state, ...fn(state) };
listeners.forEach((l) => l());
}
export function getState() {
return state;
}
export function useStore<T>(selector: (s: State) => T): T {
return useSyncExternalStore(
(l) => {
listeners.add(l);
return () => listeners.delete(l);
},
() => selector(state),
);
}
function upsertSession(s: State, session: Session): Partial<State> {
const sessionById = { ...s.sessionById, [session.id]: session };
if (session.parent_id) return { sessionById };
const others = s.sessions.filter((x) => x.id !== session.id);
const sessions = [session, ...others].sort((a, b) => b.updated_at - a.updated_at);
return { sessions, sessionById };
}
let errorSeq = 0;
function draftFor(s: State, sid: string, mid: string): Draft {
const d = s.drafts[sid];
return d && d.id === mid ? { ...d, parts: [...d.parts] } : { id: mid, parts: [] };
}
export function applyEvent(ev: ServerEvent) {
switch (ev.type) {
case "session_updated":
setState((s) => upsertSession(s, ev.session));
break;
case "session_deleted":
setState((s) => {
const { [ev.session_id]: _, ...rest } = s.sessionById;
return { sessions: s.sessions.filter((x) => x.id !== ev.session_id), sessionById: rest };
});
break;
case "session_status":
setState((s) => ({
busy: { ...s.busy, [ev.session_id]: ev.busy },
drafts: ev.busy ? s.drafts : { ...s.drafts, [ev.session_id]: undefined },
}));
break;
case "message_added":
setState((s) => {
const list = s.messages[ev.session_id];
const drafts = s.drafts[ev.session_id]?.id === ev.message.id ? { ...s.drafts, [ev.session_id]: undefined } : s.drafts;
if (!list) return { drafts };
if (list.some((m) => m.id === ev.message.id)) return { drafts };
return { messages: { ...s.messages, [ev.session_id]: [...list, ev.message] }, drafts };
});
break;
case "text_delta":
case "reasoning_delta":
setState((s) => {
const d = draftFor(s, ev.session_id, ev.message_id);
const kind = ev.type === "text_delta" ? "text" : "reasoning";
const last = d.parts[d.parts.length - 1];
if (last && last.type === kind) {
d.parts[d.parts.length - 1] = { ...last, text: last.text + ev.text } as Part;
} else {
d.parts.push({ type: kind, text: ev.text } as Part);
}
return { drafts: { ...s.drafts, [ev.session_id]: d } };
});
break;
case "tool_started":
setState((s) => {
const d = draftFor(s, ev.session_id, ev.message_id);
d.parts.push({ type: "tool_call", id: ev.call_id, name: ev.name, input: ev.input });
return { drafts: { ...s.drafts, [ev.session_id]: d } };
});
break;
case "tool_progress":
setState((s) => ({ progress: { ...s.progress, [ev.call_id]: ev.output } }));
break;
case "permission_request":
setState((s) => ({ permissions: [...s.permissions.filter((p) => p.id !== ev.id), ev] }));
break;
case "permission_resolved":
setState((s) => ({ permissions: s.permissions.filter((p) => p.id !== ev.id) }));
break;
case "question_request":
setState((s) => ({ questions: [...s.questions.filter((q) => q.id !== ev.id), ev] }));
notify(ev.questions[0]?.question ?? "");
break;
case "question_resolved":
setState((s) => ({ questions: s.questions.filter((q) => q.id !== ev.id) }));
break;
case "error":
setState((s) => ({
errors: {
...s.errors,
[ev.session_id]: [...(s.errors[ev.session_id] ?? []), { id: ++errorSeq, message: ev.message }].slice(-5),
},
}));
break;
case "mcp_status":
setState(() => ({ mcp: ev.servers }));
break;
case "resync":
void resync();
break;
}
}
/** Notify when the app is in the background and an agent needs input. */
function notify(body: string) {
if (document.visibilityState === "visible" || !("Notification" in window)) return;
if (Notification.permission === "granted") {
new Notification("CodeCraft", { body, icon: "/icon-192.png" });
}
}
export function dismissError(sessionId: string, id: number) {
setState((s) => ({ errors: { ...s.errors, [sessionId]: (s.errors[sessionId] ?? []).filter((e) => e.id !== id) } }));
}
export async function loadSessions() {
const list = await get<Session[]>("/sessions");
setState((s) => ({
sessions: list,
sessionById: { ...s.sessionById, ...Object.fromEntries(list.map((x) => [x.id, x])) },
busy: { ...s.busy, ...Object.fromEntries(list.map((x) => [x.id, !!x.busy])) },
}));
}
export async function loadSession(id: string) {
const data = await get<{ session: Session; messages: Message[]; busy: boolean }>(`/sessions/${id}`);
setState((s) => ({
...upsertSession(s, data.session),
sessionById: { ...s.sessionById, [id]: data.session },
messages: { ...s.messages, [id]: data.messages },
busy: { ...s.busy, [id]: data.busy },
}));
}
/** After reconnects: reload everything that could have changed. */
export async function resync() {
const [pending, mcp] = await Promise.all([get<any[]>("/pending"), get("/mcp")]);
setState(() => ({
permissions: pending.filter((e) => e.type === "permission_request"),
questions: pending.filter((e) => e.type === "question_request"),
mcp,
}));
await loadSessions();
const loaded = Object.keys(getState().messages);
await Promise.all(loaded.map((id) => loadSession(id).catch(() => undefined)));
}