# Shade

End-to-end encryption library implementing the Signal Protocol (X3DH + Double Ratchet) for TypeScript/Bun. Drop into any project — frontend, backend, mobile — to get forward secrecy, post-compromise recovery, and self-healing security.

> **4.0.0 — General Availability.** All V3.1 → V3.12 work is merged,
> the cross-platform vector suite is green on TS + Kotlin (1000 / 1000
> + 11 / 11), the threat model has been refreshed for every new
> surface, and the core stack (X3DH, ratchet, storage encryption,
> recovery, WebRTC P2P, Key Transparency) has been packaged for
> external review. The wire format is **unchanged from 0.4.x** — 4.0
> peers interoperate with 0.4.x peers byte-for-byte. See
> [MIGRATION.md § 0.3.x → 4.0](./MIGRATION.md#migrating-from-03x-to-40-ga)
> for the upgrade path and [CHANGELOG.md § 4.0.0](./CHANGELOG.md) for
> the consolidated release notes. Voice / Video have been moved to
> [V5.0](./docs/V5.0.md), to be built on top of the frozen 4.0
> baseline.

## Status

| Area | 4.0 status | Pointers |
|------|-----------|----------|
| Protocol core (X3DH + ratchet + sender keys) | ✅ Done — frozen | [`packages/shade-core`](./packages/shade-core) |
| Storage encryption (V3.2) | ✅ Done — opt-in `EncryptedSQLiteStorage` / `EncryptedPostgresStorage`, key sources: passphrase / OS keychain / app-injected | [`docs/storage-encryption.md`](./docs/storage-encryption.md) |
| Fingerprint gates & trust UX (V3.3) | ✅ Done — `Shade.beforeFirstLargeFile / beforeBackupImport / beforeNewDeviceTrust` | [`docs/trust-ux.md`](./docs/trust-ux.md) |
| Observability v2 (V3.4) | ✅ Done — OpenTelemetry-shaped events, `/metrics`, observer dashboard | [`docs/observability.md`](./docs/observability.md) |
| Android parity & cross-platform CI (V3.5) | ✅ Done — TS + Kotlin vector-gate live; Android `KeystoreStorage` is post-GA | [`android/shade-android/README.md`](./android/shade-android/README.md), [`docs/cross-platform.md`](./docs/cross-platform.md) |
| Async store-and-forward (V3.6) | ✅ Done — `@shade/inbox` + `@shade/inbox-server` | [`docs/inbox.md`](./docs/inbox.md) |
| Transport bridge (V3.7) | ✅ Done — SSE / long-poll / WS adapters | [`docs/transport.md`](./docs/transport.md) |
| Web Workers crypto (V3.8) | ✅ Done — lane keys never cross the thread boundary | [`docs/web-workers.md`](./docs/web-workers.md) |
| Rich file metadata + thumbnails (V3.9) | ✅ Done — in `@shade/files` | [`docs/files.md`](./docs/files.md) |
| Social key recovery (V3.10) | ✅ Done — Shamir + AEAD-gated reconstruction + guardian widgets | [`docs/recovery.md`](./docs/recovery.md) |
| WebRTC P2P transport (V3.11) | ✅ Done — `RTCDataChannel` with `MultiTransportFallback([webrtc, http])` | [`docs/webrtc.md`](./docs/webrtc.md) |
| Key Transparency (V3.12) | ✅ Done — opt-in Merkle log, signed STH, witness gossip | [`docs/key-transparency.md`](./docs/key-transparency.md) |
| External crypto review | 🟡 Bundle ready — review window open after tag | [`docs/audit/REVIEW-BUNDLE.md`](./docs/audit/REVIEW-BUNDLE.md) |
| Soak (≥ 2 weeks under load) | 🟡 Harness shipped — operator runs it | [`scripts/soak.ts`](./scripts/soak.ts) (`bun run soak --hours 336`) |
| Voice / Video / Broadcast | 🔜 V5.0 — built on top of frozen 4.0 stack | [`docs/V5.0.md`](./docs/V5.0.md) |

## What you get

**Protocol core**
- **X3DH** initial key agreement (works asynchronously via prekey bundles)
- **Double Ratchet** for per-message forward secrecy and post-compromise security
- **Sender keys** for group ratchet (1:N broadcast key derivation)
- **Identity rotation** with grace period for old sessions
- **Safety numbers** (Signal-style fingerprints) for out-of-band verification
- **Constant-time comparisons** and **memory zeroization** for hardened operation
- **Binary wire format** (`@shade/proto`) — significantly smaller than JSON

**Storage**
- **Persistent backends**: SQLite (zero-config, `bun:sqlite`) and PostgreSQL (Drizzle, FOR UPDATE SKIP LOCKED)
- **Crash-safe** — sessions survive container restarts, power outages, SIGKILL
- **At-rest encryption (V3.2, opt-in)** — AES-256-GCM under per-(table,column) DEKs; key sources: passphrase (scrypt), OS keychain (`@shade/keychain`), or app-injected. Online re-key, no downtime.

**Servers**
- **Self-authenticated prekey server** (`@shade/server`, Hono, Docker-ready) with rate limiting, metrics, health checks
- **Async store-and-forward relay** (`@shade/inbox-server`) — TTL-bound ciphertext blobs, signed PUT/FETCH/ACK, idempotent on `(address, msgId)`, per-recipient quota
- **Bridge transports** (`@shade/transport-bridge`) — WS → SSE → long-poll fallback chain for clients that can't keep a WebSocket open. Same `IncomingMessage` shape across all three.
- **Standalone container** — one image bundles prekey + inbox + bridge + transfer + KT + observer

**Trust UX**
- **Fingerprint gates (V3.3)** — `Shade.beforeFirstLargeFile(threshold, handler)`, `beforeBackupImport`, `beforeNewDeviceTrust`. Gates raise `FingerprintNotVerifiedError` on the operations that matter, default-warn TOFU otherwise.
- **`<FingerprintCompare />` / `<FingerprintGate />`** widgets for the matching UI side.

**File transfer & filesystem**
- **E2EE file transfers** (`@shade/streams` + `@shade/transfer`) — multi-lane chunked uploads/downloads with resume, integrity checks (per-lane sha256 + overall sha256), HTTP/WS fallback, `MultiTransportFallback` for N-ary demotion
- **WebRTC P2P transport (V3.11, opt-in)** — `RTCDataChannel` chunk path with public-STUN defaults, TURN-relay support, glare-safe peer pool, automatic fallback to HTTP when NAT traversal fails (`@shade/transport-webrtc`)
- **Web Workers crypto (V3.8, opt-in)** — AEAD, HKDF, HMAC, X25519, Ed25519 and per-lane stream state run in a dedicated worker. 100 MB+ uploads stay smooth without frame drops; lane keys never cross the thread boundary (`@shade/crypto-web/worker`)
- **E2EE filesystem RPC** (`@shade/files`) — typed `list/stat/mkdir/delete/move/read/write/getThumbnail` + custom ops, with rate-limit, retention, fingerprint-gate, and metrics hooks. React hooks under `@shade/files/react`.

**Recovery**
- **Social key recovery (V3.10)** — Shamir-split your identity to `n` guardians; any threshold-many `k` together restore it on a new device. No centralized recovery agent; OOB-fingerprint gate per guardian release; AES-GCM-authenticated reconstruction (`@shade/recovery` + `<RecoverySetup />` / `<RecoveryRequest />` / `<RecoveryApprove />`)

**Verifiable distribution**
- **Key Transparency (V3.12, opt-in)** — append-only Merkle log over the prekey server. Every `register` / `delete` becomes a signed leaf; every bundle-fetch carries an inclusion proof; an Ed25519-signed Tree Head ties roots to a fixed `log_id`. A `LightWitness` cross-checks STHs across clients so a malicious server that splits its view or rewrites history is caught (`@shade/key-transparency`).

**Observability**
- **Live observability** — OpenTelemetry-shaped events, bundled dashboard SPA + embeddable React widgets to see what's happening between every step (`@shade/observability` + `@shade/observer` + `@shade/dashboard`)

**Tooling**
- **CLI** — `shade init` scaffolder, `shade migrate-storage` (V3.2), `shade rotate-storage-key`, `shade fingerprint`, `shade rotate`, `shade peer`, `shade dashboard`, `shade doctor`, `shade backup` (`@shade/cli`)
- **Soak harness** — `bun run soak --hours 336` for the 2-week GA-stable window (`scripts/soak.ts`)

## Quick start

Add the Gitea npm registry to your project's `.npmrc`:

```
@shade:registry=https://gt.zyon.no/api/packages/Stian/npm/
```

Then install the SDK (one-liner for most use cases):

```bash
bun add @shade/sdk
```

Or install specific packages if you need fine-grained control:

```bash
bun add @shade/core @shade/crypto-web @shade/storage-sqlite
```

Even faster — scaffold a new project with the CLI:

```bash
bun add -g @shade/cli
shade init my-app --template bun-server
cd my-app && bun install && bun run start
```

Magic one-liner with the SDK:

```ts
import { createShade } from '@shade/sdk';

const shade = await createShade({
  prekeyServer: 'https://shade.example.com',
  storage: 'sqlite:/data/shade.db',
  address: 'alice@example.com',
});

// Send (auto-establishes session if none exists)
const envelope = await shade.send('bob@example.com', 'Hello, encrypted world!');

// Receive
const plaintext = await shade.receive('alice@example.com', incomingEnvelope);

// Your safety number for out-of-band verification
console.log(await shade.fingerprint);
```

### Opt-in surfaces (V3.x → 4.0 GA)

All of these are off by default. Wire them only where you need them.

```ts
// V3.3 — Fingerprint gates: enforce verification on the operations that matter
shade.beforeFirstLargeFile(10 * 1024 * 1024, async ({ peer, fingerprint }) => {
  return await ui.confirmSafetyNumberMatches(peer, fingerprint);
});
shade.beforeBackupImport(async ({ embeddedFingerprint }) => { /* ... */ });
shade.beforeNewDeviceTrust(async ({ peer, oldFp, newFp }) => { /* ... */ });

// V3.8 — Web Workers crypto: opt-in, lane keys stay off the main thread
shade.configureWorkerCrypto({
  workerUrl: new URL('@shade/crypto-web/worker', import.meta.url),
});

// V3.11 — WebRTC P2P transport: file transfers ride RTCDataChannel where NAT allows
import { nativeRtcFactory } from '@shade/transport-webrtc';
shade.configureWebRTC({
  factory: nativeRtcFactory(),
  iceServers: [{ urls: 'stun:stun.l.google.com:19302' }],
});

// V3.12 — Key Transparency: detect server-side bundle swaps
const shade = await createShade({
  prekeyServer: 'https://shade.example.com',
  keyTransparency: { mode: 'observe-strict', logPublicKey: PINNED_KEY_BYTES_32 },
});
```

### Files RPC (`@shade/files`)

```ts
// Server side — Bob exposes a virtual filesystem
const stop = await shade.files.serve({
  list:  async (ctx) => ({ entries: await readdirAt(ctx.path), hasMore: false }),
  read:  async (ctx) => readAt(ctx.path),    // returns inline ≤ 256 KiB or streams
  write: async (ctx) => writeAt(ctx.args),   // receives inline or streams
  // + stat, mkdir, delete, move, getThumbnail, plus typed custom ops
});

// Client side — Alice consumes Bob's filesystem
const fs = await shade.files.client('bob');
await fs.write('/photos/cover.png', new Uint8Array([/* ... */]));   // auto inline/streams
const result = await fs.read('/photos/cover.png');
```

Files ≤ 256 KiB ride inline in the RPC envelope; larger files automatically promote to multi-lane `@shade/transfer` streams with sha256 integrity. See [`docs/files.md`](./docs/files.md) for the full API.

### Lower-level access

```ts
import { ShadeSessionManager } from '@shade/core';
import { SubtleCryptoProvider } from '@shade/crypto-web';
import { SQLiteStorage } from '@shade/storage-sqlite';

const manager = new ShadeSessionManager(
  new SubtleCryptoProvider(),
  new SQLiteStorage('/data/shade.db'),
);
await manager.initialize();
```

### At-rest encryption (V3.2)

```ts
import { KeyManager, EncryptedSQLiteStorage } from '@shade/storage-encrypted';

const km = await KeyManager.open({
  kind: 'passphrase',
  passphrase: process.env.SHADE_STORAGE_PASSPHRASE!,
  salt: loadSaltFromDisk(),
});
const storage = await EncryptedSQLiteStorage.open({
  dbPath: '/data/shade-client.db',
  keyManager: km,
});
```

To migrate an existing 0.3.x SQLite DB in place:

```bash
shade migrate-storage \
  --key-source passphrase \
  --passphrase "$SHADE_STORAGE_PASSPHRASE" \
  --salt-file /data/shade-client.db.salt
```

## Architecture — keys vs. payloads

Shade splits the network into a **public-key plane** (the prekey
server) and an **encrypted plane** (everything else). The prekey
server only sees public key material. If you remember nothing else
from this README, remember this picture:

```
              Shade Prekey Container (Hono — public keys only)
                           │
        /v1/keys/*     /v1/inbox/*     /v1/bridge/*     /v1/transfer/*
        /v1/kt/*       /metrics       /healthz   /ready
                           │
        ┌──────────────────┴──────────────────┐
        │                                     │
    [Client A]                            [Client B]
    ShadeSessionManager                   ShadeSessionManager
        │                                     │
        ├── X3DH (handshake via prekey srv) ─►│
        │                                     │
        │◄── Double Ratchet messages ────────►│   ← end-to-end,
        │   (ratchet 0x02 / chunks 0x11)      │     never on the
        │                                     │     prekey server
        │
        │◄── @shade/transfer chunks ─────────►│   ← peer-to-peer
        │   POST /v1/transfer/:id/chunk        │     HTTP, opaque
        │   GET  /v1/transfer/:id/state        │     ciphertext
        │
        │◄── @shade/inbox blobs (offline) ───►│   ← TTL-bound
        │   POST /v1/inbox/:address            │     ciphertext-only
        │   POST /v1/inbox/:address/fetch      │     relay
        │
        │◄── @shade/transport-webrtc ────────►│   ← optional P2P
        │   RTCDataChannel `shade-transfer/v1` │     `MultiTransportFallback`
        │                                     │     auto-demotes to HTTP
    SQLiteStorage / PostgresStorage       SQLiteStorage / PostgresStorage
    + EncryptedSQLiteStorage (V3.2)       + EncryptedSQLiteStorage (V3.2)
        (private keys + sessions)             (private keys + sessions)
```

### What goes via the prekey server

- Identity public keys (Ed25519 + X25519)
- Signed prekeys + one-time prekey bundles
- Registration / replenish / delete writes, all Ed25519-signed
- (V3.6) Inbox ciphertext blobs with TTL — same container, separate
  routes; the relay only sees `address || msgId || ciphertext-bytes`
- (V3.7) Bridge transports (SSE / long-poll / WS) — also delivered by
  the same Hono app for clients that can't hold a WebSocket
- (V3.12, opt-in) KT inclusion proofs + signed tree heads on
  `/v1/kt/*` — verifiable distribution
- Operator-only metrics and the optional observer dashboard

### What does **not** go via the prekey server

- **Message plaintext, ever.** Encrypted ratchet envelopes flow peer-
  to-peer over whatever transport you choose (HTTP, WebSocket, your
  own broker, or the inbox relay above — which carries ciphertext only).
- **File chunks.** `@shade/transfer` POSTs ciphertext directly to the
  receiver's `/v1/transfer/:streamId/chunk` route — the prekey server
  is not involved. With V3.11 + `configureWebRTC()`, chunks ride
  `RTCDataChannel` peer-to-peer; the relay is bypassed entirely.
- **Identity private keys.** They never leave the device's storage.
- **Filesystem RPC.** `@shade/files` rides the Double Ratchet for
  control + small payloads, then promotes to direct `@shade/transfer`
  streams for larger blobs.
- **Stream resume secrets.** Persisted only on the local device,
  encrypted under a device-key derived from the identity signing key.

The prekey server is metadata-bearing (see `THREAT-MODEL.md § 2`):
it sees who registers, who fetches whose bundle, and when. It does
**not** see message contents, transfer contents, or session state.
**V3.12 Key Transparency** (opt-in) makes its bundle distribution
*verifiable* so a malicious server that swaps a bundle is caught.

For the full threat model and mitigations, read
[THREAT-MODEL.md](./THREAT-MODEL.md). For deployment-time guarantees,
read [docs/PRODUCTION-CHECKLIST.md](./docs/PRODUCTION-CHECKLIST.md).

## Packages

All packages publish in lockstep at `4.0.0`.

| Package | Purpose |
|---------|---------|
| `@shade/core` | Protocol logic (X3DH, Double Ratchet, sender keys, session manager, errors, events) |
| `@shade/proto` | Compact binary wire format (`0x01` PreKeyMessage, `0x02` RatchetMessage, `0x11` StreamChunk) |
| `@shade/crypto-web` | SubtleCrypto + @noble/curves provider, in-memory storage. Includes the V3.8 Web Workers entrypoint (`@shade/crypto-web/worker`) — drop-in `WorkerCryptoProvider` plus `createEncryptStream` / `createDecryptStream` TransformStream factories |
| `@shade/observability` | OpenTelemetry-shaped event bus consumed by `@shade/observer`, server hooks, and the dashboard |
| `@shade/keychain` | OS keychain bindings (libsecret / Keychain / Credential Manager) used by `@shade/storage-encrypted` and the CLI |
| `@shade/key-transparency` | Key Transparency (V3.12) — RFC 6962-style append-only Merkle log, address-index commitment, signed tree heads, and a `LightWitness` for split-view detection. Opt-in on both server and client. |
| `@shade/storage-sqlite` | Persistent SQLite storage (zero-config, `bun:sqlite`); also ships `SqliteInboxStore` |
| `@shade/storage-postgres` | PostgreSQL storage with Drizzle for shared databases; also ships `PostgresInboxStore` + `PostgresKTLogStore` |
| `@shade/storage-encrypted` | At-rest encryption (V3.2) — `EncryptedSQLiteStorage` / `EncryptedPostgresStorage`, `KeyManager`, online re-key |
| `@shade/streams` | Multi-lane chunk encryption — HKDF-derived per-lane keys, deterministic AES-GCM nonces, streaming SHA-256, file metadata + thumbnails (V3.9) |
| `@shade/transport` | HTTP + WebSocket transport wrappers with auto-encryption; KT-verifying `fetchBundleVerified` |
| `@shade/transport-bridge` | WS → SSE → long-poll fallback chain (V3.7) — single `IncomingMessage` shape across transports for clients that can't keep a WebSocket open |
| `@shade/transport-webrtc` | V3.11 P2P chunk transport via `RTCDataChannel`. Plugs into `@shade/transfer` as an `ITransferTransport`; signaling rides Shade's own ratchet. Memory factory + native (`globalThis.RTCPeerConnection`) factory included; `MultiTransportFallback([webrtc, http])` wired automatically when `shade.configureWebRTC()` is called. |
| `@shade/server` | Prekey server (Hono routes, auth, rate limit, health, metrics). `createPrekeyServerWithKT(...)` opts into V3.12 KT mode |
| `@shade/inbox-server` | Async store-and-forward relay (V3.6) — Hono routes, signed PUT/FETCH/DELETE, per-recipient TTL + quota, idempotent on `(address, msgId)`. Bundles into the same standalone container as the prekey server |
| `@shade/inbox` | Inbox client + durable outgoing queue + receive cursor + push-trigger hook (`onMessageQueued`); composes on top of `Shade.send`/`Shade.receive` for offline-recipient delivery |
| `@shade/transfer` | Transfer engine on top of streams: parallel lanes, resume, HTTP + WS transport with auto-fallback, `MultiTransportFallback` (N-ary demotion), integrity verification |
| `@shade/files` | Typed E2EE filesystem RPC — list/stat/mkdir/delete/move/read/write/getThumbnail + custom ops, auto inline/streams routing, production hooks (rate limit, retention, fingerprint gate, metrics), React hooks under `@shade/files/react` |
| `@shade/recovery` | Social key recovery (V3.10) — Shamir-split identity to `n` guardians; threshold-many `k` reconstruct on a new device. AES-GCM-authenticated reconstruction; OOB-fingerprint gate per guardian release |
| `@shade/observer` | Live debugger backend (snapshot, SSE, dashboard) — see [README](./packages/shade-observer/README.md) |
| `@shade/dashboard` | Standalone dashboard SPA bundled into the observer |
| `@shade/sdk` | High-level wrapper with `createShade()` one-liner, auto-publish, auto-establish, auto-replenish, `Shade.files` namespace, fingerprint gates, KT integration, WebRTC opt-in |
| `@shade/widgets` | Embeddable React widgets — fingerprint compare/gate, recovery setup/request/approve, transfer uploader/downloader, observer panels |
| `@shade/cli` | `shade init` scaffolder + utilities (fingerprint, rotate, peer, dashboard, doctor, backup, migrate-storage, rotate-storage-key) |

## Shade as a modular toolkit

Shade is split into packages so each project can depend on **only what it needs**—encrypted messaging, file transfer, prekey hosting, social recovery, KT verification, or lower-level building blocks. You do not need one giant stack for every use case.

For a **plain-language map** (which packages to add, what the prekey server does vs your own wiring, and where to start in code), see **[docs/SHADE-BY-SCENARIO.md](./docs/SHADE-BY-SCENARIO.md)**.

## Publishing

All packages publish to a self-hosted Gitea npm registry on `gt.zyon.no`. The Docker image of the standalone container ships at `gt.zyon.no/stian/shade-prekey:<tag>`.

```bash
# Bump all packages in lockstep
bun run version 4.0.1

# Dry-run (pack all tarballs without publishing) — no token required
bun run publish:dry

# Real publish — interactive (prompts for GITEA_TOKEN, checks
# registry for conflicts, publishes via scripts/publish-all.ts)
bun run publish:all

# Build + push the standalone Docker image
bun run scripts/build-docker.ts -- --tag 4.0.1 --push
```

The interactive `scripts/publish-shade.sh` is the human entrypoint;
`scripts/publish-all.ts` is the headless variant used by CI and
`publish:dry`. They share a single `PACKAGES` list (24 entries at
4.0.0) so the two flows can never drift.

## Soak / GA-stable

Before tagging `4.0.0` as `latest` and recommending production
upgrades, run the combined soak harness for ≥ 2 weeks:

```bash
# Full GA window (V4.0 §Soak): 14 days × 24 hours
bun run soak --hours 336

# Smoke (~3 minutes — ratchet ping-pong, integrity check)
bun run soak:smoke
```

The harness fans out N concurrent ratchet pairs, ping-pongs at
~400 ops/sec/pair, and reports cumulative counters every minute.
Any exception in any pair is captured and re-raised at shutdown so
silent failures cannot hide. Wrap it in `systemd-run --user`,
`nohup`, or a Gitea scheduled job for the actual 2-week window.

## Security properties

| Property | Description |
|----------|-------------|
| **Forward secrecy** | Compromising a key cannot decrypt past messages |
| **Post-compromise security** | Self-heals after key compromise on next DH ratchet |
| **Authentication** | Ed25519 identity signatures on prekey server writes |
| **Replay protection** | ±5 minute timestamp window on signed requests |
| **Constant-time comparisons** | Timing attacks on identity keys are blocked |
| **Memory zeroization** | Key material is zeroed after use (best-effort in JS) |
| **Identity verification** | Safety numbers (60 digits) for out-of-band comparison |
| **Identity rotation** | 7-day grace period for old sessions during rotation |
| **At-rest encryption** *(V3.2, opt-in)* | AES-256-GCM under per-(table, column) DEKs; AAD binds `(table, column, pk)`; passphrase / OS keychain / app-injected master key; online re-key |
| **Fingerprint gates** *(V3.3)* | `Shade.beforeFirstLargeFile / beforeBackupImport / beforeNewDeviceTrust` raise `FingerprintNotVerifiedError` on the operations that matter; defaults to TOFU + warning when no gate is registered |
| **Async store-and-forward** *(V3.6)* | Relay only sees `address || msgId || ciphertext`; idempotent PUT; signed FETCH/ACK; TTL-bounded |
| **Web-Worker key isolation** *(V3.8)* | Lane keys, identity keys, and ratchet chain keys live inside a dedicated worker; main thread only ferries plaintext via transferable buffers; idle terminate releases worker memory |
| **Social key recovery** *(V3.10)* | Shamir over GF(2^8); AEAD-authenticated reconstruction (forged shares fail); guardian-side fingerprint gate before share release |
| **WebRTC P2P transport** *(V3.11)* | Same Double Ratchet authenticates SDP/ICE signaling; chunk frames AEAD-bound to `streamId/laneId/seq`; deterministic glare resolution; `MultiTransportFallback` auto-demotes to HTTP |
| **Key Transparency** *(V3.12, opt-in)* | Append-only Merkle log + signed tree heads + witness gossip — split-view and history-rewrite are detected by clients |

## Documentation

**Operator + integrator**

- [docs/SHADE-BY-SCENARIO.md](./docs/SHADE-BY-SCENARIO.md) — **Modular toolkit**: pick packages by scenario (messages, files, browser, ops)
- [docs/PRODUCTION-CHECKLIST.md](./docs/PRODUCTION-CHECKLIST.md) — Pre-flight gates for going to production
- [docs/DEPLOYMENT.md](./docs/DEPLOYMENT.md) — Full deployment guide (Docker, env vars, PostgreSQL, backup, Dokploy)
- [docs/ROADMAP.md](./docs/ROADMAP.md) — V3.x → 4.0 GA → V5.0 trajectory

**Per-surface deep-dives**

- [docs/files.md](./docs/files.md) — `@shade/files` API + design (filesystem RPC, custom ops, hooks, React)
- [docs/streams.md](./docs/streams.md) — `@shade/streams` + `@shade/transfer` deep dive (incl. hardening + retention)
- [docs/inbox.md](./docs/inbox.md) — `@shade/inbox` + `@shade/inbox-server` async store-and-forward relay (V3.6)
- [docs/transport.md](./docs/transport.md) — `@shade/transport-bridge` SSE / long-poll / WS bridge layer (V3.7)
- [docs/web-workers.md](./docs/web-workers.md) — V3.8 Web Workers crypto: setup, bundler recipes (Vite/Webpack/Rollup), Safari notes, lifecycle, threat-model
- [docs/recovery.md](./docs/recovery.md) — `@shade/recovery` social key recovery (V3.10): Shamir setup, guardian-side gates, threshold tuning
- [docs/webrtc.md](./docs/webrtc.md) — `@shade/transport-webrtc` P2P transport (V3.11): NAT-traversal, TURN config, glare resolution, wire format, multi-fallback wiring
- [docs/key-transparency.md](./docs/key-transparency.md) — `@shade/key-transparency` (V3.12): operator + client onboarding, witness role, recovery procedures
- [docs/storage-encryption.md](./docs/storage-encryption.md) — V3.2 at-rest encryption: design, key sources, rotation
- [docs/trust-ux.md](./docs/trust-ux.md) — V3.3 fingerprint gates: when each fires, handler patterns, widget integration
- [docs/observability.md](./docs/observability.md) — V3.4 event bus + dashboard
- [docs/cross-platform.md](./docs/cross-platform.md) — V3.5 Android parity + cross-platform vector regime

**Threat model + audit**

- [SECURITY.md](./SECURITY.md) — Reporting vulnerabilities, security policy, threat-/test-matrix
- [THREAT-MODEL.md](./THREAT-MODEL.md) — Honest threat model and assumptions (12 numbered sections + residual-risks table)
- [docs/audit/REVIEW-BUNDLE.md](./docs/audit/REVIEW-BUNDLE.md) — External crypto-review entrypoint (scope, build instructions, reporting)
- [docs/audit/SCOPE.md](./docs/audit/SCOPE.md) — One-page audit-scope summary

**Migration + history**

- [MIGRATION.md](./MIGRATION.md) — How to replace existing crypto with Shade + the [0.3.x → 4.0 upgrade path](./MIGRATION.md#migrating-from-03x-to-40-ga)
- [CHANGELOG.md](./CHANGELOG.md) — `4.0.0` GA section + every prior release
- [docs/archive/](./docs/archive/) — V2.1 / V2.2 / V2.3 backlog and V3.1 → V3.12 implementation plans (all `Status: Done`)
- [docs/V5.0.md](./docs/V5.0.md) — Voice / Video / Broadcast (post-GA, built on the frozen 4.0 stack)

**Examples**

- [examples/](./examples/) — Runnable example applications, including
  [`07-streams-upload`](./examples/07-streams-upload) (multi-lane file transfer)
  and [`08-files-browser`](./examples/08-files-browser) (filesystem RPC)

## Deployment — one container per project

Shade ships as a self-contained Docker image. Deploy one container per project, point your app at it, done. Any stack (Bun, Python, Go, Rust, Kotlin) can use it — the container exposes a plain HTTP API documented in OpenAPI.

```bash
docker run -d \
  --name my-project-shade \
  -v my-project-shade:/data \
  -p 3900:3900 \
  -e SHADE_OBSERVER_TOKEN=change-me-to-at-least-16-chars \
  gt.zyon.no/stian/shade-prekey:4.0.0
```

The container includes:

- **Prekey server** — `/v1/keys/*` REST API
- **Inbox relay (V3.6)** — `/v1/inbox/*` async store-and-forward; enable
  with `SHADE_INBOX_DB_PATH=/data/inbox.db` (or `SHADE_INBOX_PG_URL`).
  `SHADE_INBOX_PRUNE_INTERVAL_MINUTES` controls TTL prune cadence.
- **Bridge transports (V3.7)** — `/v1/bridge/{stream,poll,ws}` SSE +
  long-poll + WS adapters for clients that can't keep a WebSocket open.
- **Transfer routes** — `/v1/transfer/*` chunk + state + control routes
  for `@shade/transfer`.
- **Key Transparency (V3.12)** — `/v1/kt/*` exposes `log_id`, latest +
  historical STH, and consistency proofs. Enable with
  `SHADE_KT_*` env vars; off by default.
- **Observer dashboard** — `/shade-observer/dashboard/` (off unless
  `SHADE_OBSERVER_TOKEN` is set)
- **OpenAPI spec** — `/openapi.yaml` and interactive `/docs` viewer
  (covers all 27 routes — prekey, inbox, bridge, transfer, KT,
  observer, `/metrics`, `/healthz`, `/ready`)
- **Prometheus metrics** — `/metrics`
- **Health probes** — `/health` (full), `/healthz` (liveness),
  `/ready` (readiness)
- **Stale cleanup** — purges inactive identities automatically

See [docs/DEPLOYMENT.md](./docs/DEPLOYMENT.md) for the full deployment guide, environment variables, PostgreSQL config, backup strategy, and Dokploy instructions.

## License

MIT
