Pipelit v0.3.12

Added

• input_template for node input scoping — Agent and deep_agent nodes can declare input_template in extra_config to receive a specific slice of state as their input message (e.g. {{ scribe.output }}), instead of inheriting the full conversation history. Enables clean parallel fan-out patterns.
• reply_chat terminal node — New component type that sends a message back to the chat caller and ends the workflow. Reads message from system_prompt (Jinja-resolved) with extra_config.message fallback. Registered in frontend Output category.
• Node input/output debug logging — execution_logs.input column now stores resolved system_prompt and input_template values per node execution for full observability.
• Frontend: input_template field — Visible in agent/deep_agent node config panel with Jinja template support.
• Frontend: reply_chat node type — Available in Output category of node palette with message field.

Fixed

• Parallel state race condition — save_state now uses Redis WATCH/MULTI for atomic read-merge-write of node_outputs, preventing parallel workers from overwriting each other's outputs.
• _input_override state leak — Cleared after each node completes so downstream nodes don't inherit stale overrides.
• Merge node type validation — Changed merge input type from ARRAY to ANY so it can accept outputs from agent/deep_agent nodes in fan-in patterns.