v1.0.0 — Lightweight DAG Workflow Runner

dagrun v1.0.0

Re-implementation of dagu (3.2K stars) in Go.

Why Reimplement?

• Zero deps (dagu has 441: 59 direct + 382 indirect)
• 10.9x smaller binary (9.2 MB vs 100.4 MB)
• 27% faster (395ms vs 539ms avg)
• MIT license (dagu is GPL-3.0)
• Focused scope — DAG runner only, no Web UI/Docker/LLM bloat

Features

• Kahn's algorithm DAG construction with cycle detection
• Channel-driven parallel executor with concurrency limits
• 3 executors: command, HTTP, script
• YAML workflow definitions
• Retry with exponential backoff, timeouts, preconditions
• DOT graph visualization, JSON output

Quality

• 168 tests, 5 adversarial eval cycles (4 bugs fixed), 3 consecutive clean