v1.9.0

Features

Graph Serialization

• Add file-free graph.json round-trip helpers (7175f4a)
• Widen json_serializable for template value types (4d3b5c6)

Pipeline Runtime Controls

• Add gc_collect gate and propagate typed pipeline errors (dc02587)

Template Generation API

• Add public build_llm_call_fn constructor (f31c558)

Bug Fixes

SSRF Protection

• Validate every resolved IP in the URL SSRF guard (50cb9e5)

Template Generation Security

• Enforce identifier security gate at render time (052fa28)