v0.1.90

🚀 Release Highlights — v0.1.90 (2026-05-25)

v0.1.90 strengthens MassGen's checklist-gated refinement loop: non-discriminative criteria are softened, checklist reasoning becomes next-round feedback, candidate ordering is counterbalanced, and gate thresholds now share one consistent 0-10 scale.

🎯 Discriminative-Power Pruning

• Bootstrap criteria now compute per-criterion score spread across agents
• Low-spread criteria are demoted to stretch so they stay visible without acting as hard gates
• A protected floor prevents the gate from being hollowed out

🧠 Criterion Feedback Loop

• Checklist score reasoning is extracted after each verdict
• Per-agent score submissions keep the lowest-score reasoning per criterion as the most diagnostic signal
• Next-round agents receive a <CRITERION FEEDBACK ...> memo with failed criteria marked

⚖️ Position-Bias Calibration

• Candidate answer order rotates per scoring agent
• Primacy-slot exposure is distributed across agents
• Equal aggregate checklist scores break deterministically, independent of insertion order

📏 Unified Checklist Gate

• ChecklistGate.from_budget(...) derives effective threshold, required-true count, and confidence cutoff together
• The checklist gate now consistently uses a 0-10 threshold scale
• Fast-iteration defaults continue to relax the gate as answer budget tightens

🧩 Shared Score Utilities

• New massgen/score_utils.py centralizes score extraction and per-agent score-shape detection
• Checklist server, quality server, and bootstrap criteria now share the same parsing behavior
• llm_circuit_breaker_* kwarg parsing is consolidated into the shared custom-tool/MCP backend base

⚡ Fast-Iteration Config Updates

• Fast-iteration examples now default to local command execution
• fast_iteration.yaml refreshes its default pairings for current Gemini + Codex workflows
• Antigravity fast-iteration config remains available for CLI-backed Google runs

🧪 Tests

• massgen/tests/test_discriminative_pruning.py
• massgen/tests/test_criterion_feedback.py
• massgen/tests/test_position_bias_calibration.py
• massgen/tests/test_score_utils.py
• Updated massgen/tests/test_checklist_tools_server.py

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📖 Getting Started

• Quick Start Guide
• Install:

  pip install massgen==0.1.90

• Try It:

  uv run massgen --config massgen/configs/features/fast_iteration.yaml "Create an svg of an AI agent coding."

What's Changed

• docs: docs for v0.1.90 by @Henry-811 in #1103
• feat: v0.1.90 by @Henry-811 in #1102

Full Changelog: v0.1.89...v0.1.90