v0.1.55

🚀 Release Highlights — v0.1.55 (2026-02-23)

🧩 Specialized Subagent Types

• Discovery-Based Roles: Specialized subagent roles via SUBAGENT.md frontmatter — evaluator (programmatic verification), explorer (investigation), researcher (deep analysis), novelty (breaks refinement plateaus)
• TUI Visualization: Subagent roles displayed in agent status indicators

📊 Dynamic Evaluation Criteria

• Task-Specific Quality Gates: GEPA-inspired evaluation criteria generation replacing static checklist items, with domain-specific presets (persona, decomposition, evaluation, prompt, analysis)
• Core/Stretch Convergence: Items categorized as core or stretch — convergence off-ramp triggers when all core items pass. Score scale 0-10. Config: evaluation_criteria_generator

🔧 Infrastructure

• Native Backend Image Routing: understand_image routes to agent's own backend (Claude, Gemini, Grok, Claude Code, Codex) with OpenAI fallback
• Configurable Video Frame Extraction: Scene-based (PySceneDetect) or uniform modes with max_frames cost guardrail (default 30, max 60). Config: multimodal_config.video
• Remotion Skill: Video generation/editing skill available in quickstart wizard
• Unified Pre-Collaboration: Persona generation, decomposition, and eval criteria generation unified as composable primitives

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📖 Getting Started

• Quick Start Guide
• Try It:

  # Install or upgrade to v0.1.55
  pip install --upgrade massgen
  
  # Multi-agent coordination with specialized subagents
  uv run massgen --config massgen/configs/features/background_subagent_example.yaml --cwd-context ro "Use an explorer subagent to analyze this repo"

What's Changed

• feat: Add subagent roles by @ncrispino in #938
• docs: docs for v0.1.55 by @Henry-811 in #939
• feat: v0.1.55 by @Henry-811 in #935

Full Changelog: v0.1.54...v0.1.55