Add privacy-first design and policy documentation

docs/PRIVACY POLICY.md

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+# ChronoSeal Privacy & Design Principles
+
+## Privacy-First Browser Attestation Framework
+
+ChronoSeal is a lightweight, privacy-first browser attestation framework designed to resist:
+
+- automated bots
+- AI-driven browser automation
+- scripted abuse
+- browser surveillance ecosystems
+
+Unlike conventional anti-bot systems, ChronoSeal is intentionally designed to operate **without collecting or storing client identity data**.
+
+---
+
+# Core Philosophy
+
+ChronoSeal verifies:
+
+- session continuity
+- runtime coherence
+- cryptographic synchronization
+
+It does **not** verify:
+
+- personal identity
+- browsing history
+- behavioral profiles
+- long-term reputation
+
+The framework is built around one principle:
+
+> Verify live browser participation without turning users into telemetry.
+
+---
+
+# Privacy-First By Architecture
+
+ChronoSeal is intentionally engineered to avoid becoming:
+
+- a tracking platform
+- a fingerprinting database
+- a telemetry pipeline
+- a surveillance system
+
+## ChronoSeal Does NOT Store
+
+- IP addresses
+- Browser history
+- Persistent fingerprints
+- User profiles
+- Behavioral telemetry
+- Tracking identifiers
+- Device databases
+- Long-term session history
+- Cross-site correlation data
+
+No client-side personal information is persisted.
+
+---
+
+# Stateless Trust Model
+
+ChronoSeal focuses on:
+
+- ephemeral runtime verification
+- cryptographic continuity
+- synchronized challenge progression
+- live execution integrity
+
+The server only validates:
+
+- whether the current browser session behaves like a coherent participant *right now*
+
+ChronoSeal does not maintain:
+
+- user identity databases
+- reputation systems
+- persistent surveillance records
+
+---
+
+# Anti-Bot Without Surveillance
+
+Most modern anti-bot systems rely heavily on:
+
+- fingerprinting
+- behavioral tracking
+- telemetry aggregation
+- centralized analytics
+
+ChronoSeal deliberately rejects this model.
+
+Instead, ChronoSeal uses:
+
+- synchronized cryptographic chains
+- WASM-isolated signing
+- protocol continuity
+- transient verification state
+
+This provides bot resistance while preserving user privacy.
+
+---
+
+# Lightweight By Design
+
+ChronoSeal is intentionally engineered to remain:
+
+- compact
+- dependency-light
+- operationally simple
+- Unix-native
+
+## Current Footprint
+
+### Server Binary
+
+Compiled x86_64 Linux server binary:
+
+- ~8.4 MB
+
+### WASM Runtime
+
+`chronoseal_wasm_bg.wasm`
+
+- ~218 KB
+
+### Full WASM Package
+
+Entire generated WASM package:
+
+- ~720 KB
+
+Includes:
+
+- WASM runtime
+- JavaScript glue code
+- Type definitions
+
+---
+
+# No Frontend Framework Dependency
+
+ChronoSeal does not depend on:
+
+- React
+- Angular
+- Vue
+- Electron
+- Node.js runtime
+- Browser bundler ecosystems
+
+The browser runtime uses:
+
+- native ES modules
+- direct WebAssembly loading
+- lightweight JavaScript glue
+
+This minimizes:
+
+- dependency complexity
+- supply-chain risk
+- build fragility
+- browser overhead
+
+---
+
+# Clean Repository Philosophy
+
+ChronoSeal keeps generated artefacts out of version control.
+
+## What Is NOT Stored In The Repository
+
+| Path | Reason |
+|---|---|
+| `wasm/pkg/` | Generated build output |
+| `frontend/pkg/` | Generated serve-time artefacts |
+| `target/` | Standard Rust build artefacts |
+
+Generated binaries change frequently and are reproducible from source.
+
+The repository intentionally stores:
+
+- source code
+- architecture
+- reproducible build logic only
+
+---
+
+# Unix-Native Operational Model
+
+ChronoSeal is designed as:
+
+- infrastructure software
+- not browser-centric SaaS
+
+Core operational principles:
+
+- CLI-first operation
+- systemd-native deployment
+- structured logs
+- explicit configuration
+- inspectable runtime behavior
+- minimal hidden state
+
+ChronoSeal should feel natural on Linux systems:
+
+- simple to deploy
+- easy to audit
+- understandable years later
+
+---
+
+# Security Through Operational Asymmetry
+
+ChronoSeal increases attacker cost through:
+
+- synchronization burden
+- runtime continuity requirements
+- WASM-isolated cryptographic execution
+- chained session progression
+
+It does not attempt:
+
+- invasive tracking
+- permanent identification
+- surveillance-driven scoring
+
+---
+
+# Design Goals
+
+ChronoSeal prioritizes:
+
+- Privacy
+- Simplicity
+- Transparency
+- Operational clarity
+- Long-term maintainability
+- Minimalism
+- Unix-native behavior
+- Low deployment friction
+
+---
+
+# Non-Goals
+
+ChronoSeal is intentionally NOT:
+
+- A surveillance platform
+- A telemetry collection system
+- A browser fingerprinting database
+- An analytics engine
+- A cloud lock-in service
+- A JavaScript-heavy frontend platform
+- An advertising or tracking framework
+
+---
+
+# Summary
+
+ChronoSeal is designed to prove:
+
+> “A live browser session is coherently participating right now.”
+
+without storing:
+
+- who the user is
+- where they came from
+- what they previously did
+
+It is a lightweight, privacy-preserving, Unix-native browser attestation framework focused on:
+
+- anti-bot resistance
+- anti-automation
+- operational simplicity
+
+without compromising user privacy.