diff --git a/sigwork.js b/sigwork.js
new file mode 100644
index 0000000..2f8f52d
--- /dev/null
+++ b/sigwork.js
@@ -0,0 +1,587 @@
+const DANGEROUS_PROTOCOLS = /^(javascript|data|vbscript):/i;
+const DANGEROUS_ATTRIBUTES = /^on/i;
+
+const sanitizeUrl = (url) => {
+    const str = String(url ?? '').trim().toLowerCase();
+    if (DANGEROUS_PROTOCOLS.test(str)) return '#';
+    return str;
+};
+
+const sanitizeAttribute = (name, value) => {
+    if (value == null) return null;
+    const strValue = String(value);
+    if (DANGEROUS_ATTRIBUTES.test(name)) {
+        console.warn(`[SigPro] XSS prevention: blocked attribute "${name}"`);
+        return null;
+    }
+    if (name === 'src' || name === 'href') {
+        return sanitizeUrl(strValue);
+    }
+    return strValue;
+};
+
+let activeEffect = null;
+let isScheduled = false;
+const queue = new Set();
+
+const tick = () => {
+    while (queue.size) {
+        const runs = [...queue];
+        queue.clear();
+        runs.forEach(fn => fn());
+    }
+    isScheduled = false;
+};
+
+const schedule = (fn) => {
+    if (fn.d) return;
+    queue.add(fn);
+    if (!isScheduled) {
+        queueMicrotask(tick);
+        isScheduled = true;
+    }
+};
+
+const depend = (subs) => {
+    if (activeEffect && !activeEffect.c) {
+        subs.add(activeEffect);
+        activeEffect.e.add(subs);
+    }
+};
+
+export const effect = (fn, isScope = false) => {
+    let cleanup = null;
+
+    const run = () => {
+        if (run.d) return;
+        const prev = activeEffect;
+        activeEffect = run;
+        const result = fn();
+        if (typeof result === 'function') cleanup = result;
+        activeEffect = prev;
+    };
+
+    const stop = () => {
+        if (run.d) return;
+        run.d = true;
+        run.e.forEach(subs => subs.delete(run));
+        run.e.clear();
+        cleanup?.();
+        run.c?.forEach(f => f());
+    };
+
+    run.e = new Set();
+    run.d = false;
+    if (isScope) run.c = [];
+
+    run();
+    activeEffect?.c?.push(stop);
+
+    return stop;
+};
+
+effect.react = (fn) => {
+    const prev = activeEffect;
+    activeEffect = null;
+    const result = fn();
+    activeEffect = prev;
+    return result;
+};
+
+export function $(initial, storageKey) {
+    const isComputed = typeof initial === 'function';
+
+    if (!isComputed) {
+        let value = initial;
+        const subs = new Set();
+
+        if (storageKey) {
+            try {
+                const saved = localStorage.getItem(storageKey);
+                if (saved !== null) value = JSON.parse(saved);
+            } catch { }
+        }
+
+        const signalFn = (...args) => {
+            if (args.length === 0) {
+                return value;
+            }
+            const next = typeof args[0] === 'function' ? args[0](value) : args[0];
+            if (Object.is(value, next)) return value;
+            value = next;
+            if (storageKey) {
+                try {
+                    localStorage.setItem(storageKey, JSON.stringify(value));
+                } catch { }
+            }
+            subs.forEach(fn => schedule(fn));
+            return value;
+        };
+
+        signalFn.react = () => {
+            depend(subs);
+            return value;
+        };
+
+        return signalFn;
+    }
+
+    let cached;
+    let dirty = true;
+    const subs = new Set();
+    const fn = initial;
+
+    effect(() => {
+        const newValue = fn();
+        if (!Object.is(cached, newValue) || dirty) {
+            cached = newValue;
+            dirty = false;
+            subs.forEach(fn => schedule(fn));
+        }
+    });
+
+    const computedFn = () => {
+        return cached;
+    };
+
+    computedFn.react = () => {
+        depend(subs);
+        return cached;
+    };
+
+    return computedFn;
+}
+
+export const scope = (fn) => effect(fn, true);
+
+export const watch = (source, callback) => {
+    let first = true;
+    let oldValue;
+
+    return effect(() => {
+        const newValue = source();
+        if (!first) {
+            effect.react(() => callback(newValue, oldValue));
+        } else {
+            first = false;
+        }
+        oldValue = newValue;
+    });
+};
+
+const reactiveCache = new WeakMap();
+
+export function $$(obj) {
+    if (reactiveCache.has(obj)) {
+        return reactiveCache.get(obj);
+    }
+
+    const subs = {};
+
+    const proxy = new Proxy(obj, {
+        get(target, key, receiver) {
+            const subsForKey = subs[key] ??= new Set();
+            depend(subsForKey);
+            const val = Reflect.get(target, key, receiver);
+            return (val && typeof val === 'object') ? $$(val) : val;
+        },
+        set(target, key, val, receiver) {
+            if (Object.is(target[key], val)) return true;
+            const success = Reflect.set(target, key, val, receiver);
+            if (subs[key]) {
+                subs[key].forEach(fn => schedule(fn));
+                if (!isScheduled) {
+                    queueMicrotask(tick);
+                    isScheduled = true;
+                }
+            }
+            return success;
+        }
+    });
+
+    reactiveCache.set(obj, proxy);
+    return proxy;
+}
+
+let context = null;
+
+export const onMount = (fn) => {
+    context?.m.push(fn);
+};
+
+export const onUnmount = (fn) => {
+    context?.u.push(fn);
+};
+
+export const share = (key, value) => {
+    if (context) context.p[key] = value;
+};
+
+export const use = (key, defaultValue) => {
+    if (context && key in context.p) return context.p[key];
+    return defaultValue;
+};
+
+export function createContext(defaultValue) {
+    const key = Symbol('context');
+
+    const useContext = () => {
+        let current = context;
+        while (current) {
+            if (key in current.p) {
+                return current.p[key];
+            }
+            current = null;
+        }
+        if (defaultValue !== undefined) return defaultValue;
+        throw new Error(`Context not found: ${String(key)}`);
+    };
+
+    const Provider = ({ value, children }) => {
+        const prevContext = context;
+        if (!context) {
+            context = { m: [], u: [], p: {} };
+        }
+        context.p[key] = value;
+        const result = h('div', { style: 'display: contents' }, children);
+        context = prevContext;
+        return result;
+    };
+
+    return { Provider, use: useContext };
+}
+
+export function createSharedContext(key, initialValue) {
+    if (context && !(key in context.p)) {
+        share(key, initialValue);
+    }
+
+    return {
+        set: (value) => share(key, value),
+        get: () => use(key)
+    };
+}
+
+const isFn = (v) => typeof v === 'function';
+const isNode = (v) => v instanceof Node;
+
+const append = (parent, child) => {
+    if (child === null) return;
+
+    if (isFn(child)) {
+        const anchor = document.createTextNode('');
+        parent.appendChild(anchor);
+        let nodes = [];
+
+        effect(() => {
+            effect(() => {
+                const newNodes = [child()]
+                    .flat(Infinity)
+                    .map((node) => isFn(node) ? node() : node)
+                    .flat(Infinity)
+                    .filter((node) => node !== null)
+                    .map((node) => isNode(node) ? node : document.createTextNode(String(node)));
+
+                const oldNodes = nodes.filter(node => {
+                    const keep = newNodes.includes(node);
+                    if (!keep) remove(node);
+                    return keep;
+                });
+
+                const oldIdxs = new Map(oldNodes.map((node, i) => [node, i]));
+
+                for (let i = newNodes.length - 1, p = oldNodes.length - 1; i >= 0; i--) {
+                    const node = newNodes[i];
+                    const ref = newNodes[i + 1] || anchor;
+
+                    if (!oldIdxs.has(node)) {
+                        anchor.parentNode?.insertBefore(node, ref);
+                        node.$c?.m.forEach(fn => fn());
+                    } else if (oldNodes[p] !== node) {
+                        if (newNodes[i - 1] !== oldNodes[p]) {
+                            anchor.parentNode?.insertBefore(oldNodes[p], node);
+                            oldNodes[oldIdxs.get(node)] = oldNodes[p];
+                            oldNodes[p] = node;
+                            p--;
+                        }
+                        anchor.parentNode?.insertBefore(node, ref);
+                    } else {
+                        p--;
+                    }
+                }
+                nodes = newNodes;
+            });
+        }, true);
+    } else if (isNode(child)) {
+        parent.appendChild(child);
+    } else {
+        parent.appendChild(document.createTextNode(String(child)));
+    }
+};
+
+const remove = (node) => {
+    const el = node;
+    el.$s?.();
+    el.$l?.(() => node.remove());
+    if (!el.$l) node.remove();
+};
+
+const render = (fn, ...data) => {
+    let node;
+    const stop = effect(() => {
+        node = fn(...data);
+        if (isFn(node)) node = node();
+    }, true);
+    if (node) node.$s = stop;
+    return node;
+};
+
+export const h = (tag, props, ...children) => {
+    props = props || {};
+    children = children.flat(Infinity);
+
+    if (isFn(tag)) {
+        const prev = context;
+        context = { m: [], u: [], p: { ...(prev?.p || {}) } };
+        let el;
+
+        const stop = effect(() => {
+            el = tag(props, {
+                children,
+                emit: (evt, ...args) =>
+                    props[`on${evt[0].toUpperCase()}${evt.slice(1)}`]?.(...args),
+            });
+            return () => el.$c.u.forEach(fn => fn());
+        }, true);
+
+        if (isNode(el) || isFn(el)) {
+            el.$c = context;
+            el.$s = stop;
+        }
+
+        context = prev;
+        return el;
+    }
+
+    if (!tag) return () => children;
+
+    let el;
+    let is_svg = false;
+
+    try {
+        el = document.createElement(tag);
+        if (el instanceof HTMLUnknownElement) {
+            is_svg = true;
+            el = document.createElementNS("http://www.w3.org/2000/svg", tag);
+        }
+    } catch {
+        is_svg = true;
+        el = document.createElementNS("http://www.w3.org/2000/svg", tag);
+    }
+
+    const booleanAttributes = ["disabled", "checked", "required", "readonly", "selected", "multiple", "autofocus"];
+
+    for (const key in props) {
+        if (key.startsWith('on')) {
+            const eventName = key.slice(2).toLowerCase();
+            el.addEventListener(eventName, props[key]);
+        } else if (key === "ref") {
+            if (isFn(props[key])) {
+                props[key](el);
+            } else {
+                props[key].current = el;
+            }
+        } else if (isFn(props[key])) {
+            effect(() => {
+                const val = props[key]();
+                if (key === 'className') {
+                    el.setAttribute('class', String(val ?? ''));
+                } else if (booleanAttributes.includes(key)) {
+                    el[key] = !!val;
+                    val ? el.setAttribute(key, '') : el.removeAttribute(key);
+                } else if (key in el && !is_svg) {
+                    el[key] = val;
+                } else {
+                    const safeVal = sanitizeAttribute(key, val);
+                    if (safeVal !== null) el.setAttribute(key, safeVal);
+                }
+            });
+        } else {
+            const value = props[key];
+            if (key === 'className') {
+                el.setAttribute('class', String(value ?? ''));
+            } else if (booleanAttributes.includes(key)) {
+                el[key] = !!value;
+                value ? el.setAttribute(key, '') : el.removeAttribute(key);
+            } else if (key in el && !is_svg) {
+                el[key] = value;
+            } else {
+                const safeVal = sanitizeAttribute(key, value);
+                if (safeVal !== null) el.setAttribute(key, safeVal);
+            }
+        }
+    }
+
+    children.forEach((child) => append(el, child));
+
+    return el;
+};
+
+export const If = (cond, renderFn, fallback = null) => {
+    let cached;
+    let current = null;
+
+    return () => {
+        const show = isFn(cond) ? cond() : cond;
+        if (show !== current) {
+            cached = show ? render(renderFn) : (isFn(fallback) ? render(fallback) : fallback);
+        }
+        current = show;
+        return cached;
+    };
+};
+
+export const For = (list, key, renderFn) => {
+    let cache = new Map();
+
+    return () => {
+        const next = new Map();
+        const items = (isFn(list) ? list() : list.value || list);
+
+        const nodes = items.map((item, index) => {
+            const idx = isFn(key) ? key(item, index) : key ? item[key] : index;
+            let node = cache.get(idx);
+            if (!node) {
+                node = render(renderFn, item, index);
+            }
+            next.set(idx, node);
+            return node;
+        });
+
+        cache = next;
+        return nodes;
+    };
+};
+
+export const Transition = ({ enter: e, idle, leave: l }, { children: [c] }) => {
+    const decorate = (el) => {
+        if (!isNode(el)) return el;
+
+        const addClass = (c) => c && el.classList.add(...c.split(' '));
+        const removeClass = (c) => c && el.classList.remove(...c.split(' '));
+
+        if (e) {
+            requestAnimationFrame(() => {
+                addClass(e[1]);
+                requestAnimationFrame(() => {
+                    addClass(e[0]);
+                    removeClass(e[1]);
+                    addClass(e[2]);
+                    el.addEventListener('transitionend', () => {
+                        removeClass(e[2]);
+                        removeClass(e[0]);
+                        addClass(idle);
+                    }, { once: true });
+                });
+            });
+        }
+
+        if (l) {
+            el.$l = (done) => {
+                removeClass(idle);
+                addClass(l[1]);
+                requestAnimationFrame(() => {
+                    addClass(l[0]);
+                    removeClass(l[1]);
+                    addClass(l[2]);
+                    el.addEventListener('transitionend', () => {
+                        removeClass(l[2]);
+                        removeClass(l[0]);
+                        done();
+                    }, { once: true });
+                });
+            };
+        }
+
+        return el;
+    };
+
+    if (!c) return null;
+    if (isFn(c)) {
+        return () => decorate(c());
+    }
+    return decorate(c);
+};
+
+export const Router = (routes) => {
+    const getPath = () => window.location.hash.slice(1) || "/";
+    const path = $(getPath());
+    const params = $({});
+
+    const matchRoute = (path) => {
+        for (const route of routes) {
+            const routeParts = route.path.split("/").filter(Boolean);
+            const pathParts = path.split("/").filter(Boolean);
+
+            if (routeParts.length !== pathParts.length) continue;
+
+            const matchedParams = {};
+            let ok = true;
+
+            for (let i = 0; i < routeParts.length; i++) {
+                if (routeParts[i].startsWith(":")) {
+                    matchedParams[routeParts[i].slice(1)] = pathParts[i];
+                } else if (routeParts[i] !== pathParts[i]) {
+                    ok = false;
+                    break;
+                }
+            }
+
+            if (ok) return { component: route.component, params: matchedParams };
+        }
+
+        const wildcard = routes.find(r => r.path === "*");
+        if (wildcard) return { component: wildcard.component, params: {} };
+
+        return null;
+    };
+
+    window.addEventListener("hashchange", () => path(getPath()));
+
+    const outlet = h("div");
+
+    effect(() => {
+        const matched = matchRoute(path());
+        if (!matched) return;
+
+        params(matched.params);
+
+        while (outlet.firstChild) outlet.removeChild(outlet.firstChild);
+        outlet.appendChild(h(matched.component));
+    });
+
+    return {
+        view: outlet,
+        to: (p) => { window.location.hash = p; },
+        back: () => window.history.back(),
+        params: () => params,
+    };
+};
+
+export const mount = (component, target, props) => {
+    const targetEl = typeof target === "string" ? document.querySelector(target) : target;
+    if (!targetEl) throw new Error("Target element not found");
+    const el = h(component, props);
+    targetEl.appendChild(el);
+    el.$c?.m.forEach(fn => fn());
+    return () => remove(el);
+};
+
+export default (target, root, props) => {
+    const el = h(root, props);
+    target.appendChild(el);
+    el.$c?.m.forEach(fn => fn());
+    return () => remove(el);
+};
+
+export { h as jsx, h as jsxs, h as Fragment };
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