Oak-Sparrow-OS

Oak-Sparrow-OS is a deterministic governance kernel that runs on Android. It sits between an AI agent and the actions the agent wants to take on a phone, evaluating every proposed action before execution. The kernel uses numeric threshold logic (gamma, entropy, divergence), not a language model checking itself. Every decision is signed with Ed25519 and sealed in a content-addressed audit log that is byte-deterministic and replayable. Three verdict states. APPROVED for safe routine actions, signed and logged. PAUSED for actions requiring user confirmation, gate fail-closed until explicit approval. BLOCKED for destructive or out-of-policy actions, the plan never reaches execution. Eight Kotlin modules form the base kernel (core, gate, attestation, audit, metrics, calibration, adversarial suite, shared fixtures). Two governance layers above: plan-governance evaluates whole plans before any step runs, plan-metrics scores the audit log in real time. Android integration on top: perception via accessibility services, voice chat UI, agent replaces Google Assistant. Composable defense in depth. Upstream: Veea Lobster Trap inspects prompts before they reach the LLM. Midstream: Gemini Flash for fast action planning, Gemini Pro for advanced reasoning and vision-based UI, Claude Opus as fallback, on-device Qwen3-4B for offline. Downstream: the kernel decides whether the action is permitted. Parallel: behavioral anomaly detection adapted from planetary technosignature detection watches for circumvention attempts. Submission build v0.5.0-gemini, latest release, 142 MB APK attached for one-click install. MIT licensed. Oak and Sparrow Systems Enterprises LLC. California, formed February 2026. Joshua Johosky (CEO, plan-governance), Sky Smith (architect, kernel, perception, Gemini integration), Mool Tyagi (fractional CTO, demo, adversarial testing), Jackson Castro (governance metrics), Caleb Strom (anomaly detection).