Epic: v0.4 — Deterministic Engine Pipeline (Rules + Bundling + Context Chain) #147

Overview

Implement the deterministic pre-LLM engine pipeline: rule engine, file bundling, and context chain extraction. Three deeply intertwined features in a single PR.

Features

• feat: Pre-LLM deterministic rule engine — zero-cost pattern matching #116 — Pre-LLM Deterministic Rule Engine (Phase 1)
• feat: File bundling — parallel per-bundle review for large changesets #115 — File Bundling / Parallel Review (Phase 2)
• feat: Deterministic context chain — AST-based cross-file dependency extraction #114 — Deterministic Context Chain (Phase 3)

Architecture

diff → diff_parser → rules engine → bundling → [parallel per bundle] → context chain → LLM → merge

Key Decisions

• Pure regex for rules (no tree-sitter)
• syn crate for Rust AST (context chain)
• Single PR, branch feat/v0.4-engine from develop
• All loop/concurrency config default: 5

New Dependencies

• syn = 2 (Rust AST)

Est. Effort: 7-10 days