Offline-first CRDT coordination app for flood relief. Hand-written conflict-free replicated data type (~1,700 lines, no CRDT library) with hybrid logical clocks, content-addressed identity dedup, and per-device stock counters. Custom binary wire codec cuts payload size 82.6% vs. JSON; four degrading transports (animated QR, Wi-Fi, SMS, paper forms) for zero-connectivity field use. 424 tests across 30 suites, including a 10-device/5,000-op convergence fuzz simulation.

Code intelligence platform for JS/TS/React: Tree-sitter AST parsing into a repository knowledge graph (20+ node/edge types), hybrid BM25 + vector + graph-traversal retrieval fused with RRF and cross-encoder re-ranking, with answers cited against verified file spans. AST-based refactors (rename, move, extract) ship with diff preview, an approval gate, and behavior-verified extraction. 14-package pnpm monorepo with a CLI, REST/SSE API, and an MCP server used from Claude Code and Cursor.

OpenClaw-inspired AI coding agent with an approval-gated harness: every file and shell mutation runs against an in-memory workspace overlay and is staged for explicit approval with a real diff before touching disk, with every tool call recorded in an immutable audit log. A shared session/tool/approval core drives both a CLI and a Telegram bot from one codebase.