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OpenMontage - Shared Project Context

This is the single source of truth for project architecture and conventions. All platform-specific agent files (CLAUDE.md, CODEX.md, CURSOR.md, COPILOT.md) should point here instead of duplicating this content.

Identity

OpenMontage is an open-source, AI-orchestrated video production platform.

Architecture: Instruction-Driven (Agent-First)

The AI agent IS the intelligence. Python exists only for tools and persistence. Everything else — orchestration, creative decisions, review, stage transitions — lives in instructions (YAML manifests + markdown skills) the agent follows.

Agent reads pipeline manifest (YAML) → reads stage director skill (MD)
→ uses tools (Python BaseTool) → self-reviews (meta skill)
→ checkpoints (Python utility) → presents to human for approval

No Python orchestrator, no Python reviewer, no Python handlers. The agent drives the pipeline.

Source of Truth

  • Agent guide & contract: AGENT_GUIDE.md (tool inventory, pipeline selection, stage agents, protocols)
  • Skill index: skills/INDEX.md
  • Tool registry: tools/tool_registry.py
  • Pipeline manifests: pipeline_defs/
  • Artifact schemas: schemas/artifacts/
  • Style playbooks: styles/*.yaml (schema: schemas/styles/playbook.schema.json)
  • Stage director skills: skills/pipelines/<pipeline>/<stage>-director.md
  • Meta skills: skills/meta/*.md (reviewer, checkpoint-protocol, skill-creator)
  • Architecture deep-dive: docs/ARCHITECTURE.md

Knowledge Architecture (3 Layers)

Layer 1: tools/tool_registry.py     → "What tools exist" (runtime capabilities, status, cost)
Layer 2: skills/                    → "How OpenMontage uses them" (project conventions)
Layer 3: .agents/skills/            → "How the technology works" (generic API rules, skills.sh)

Each tool's agent_skills[] field bridges Layer 1 → Layer 3. See skills/INDEX.md for the full mapping.

Key Patterns

  • Pipeline state machine: idea -> script -> scene_plan -> assets -> edit -> compose -> publish
  • Instruction-driven stages: Each stage has a director skill (MD) that teaches the agent HOW
  • Pipeline manifests: Declarative YAML defining stages, skills, tools, review focus, approval gates
  • Capability-first tool design: Each major family should expose a selector tool plus explicit provider tools
    • Example: tts_selector + elevenlabs_tts / google_tts / openai_tts / piper_tts
    • Example: video_selector + heygen_video / wan_video / hunyuan_video / ltx_video_local / ltx_video_modal / cogvideo_video
  • Style playbooks: YAML defining visual language, typography, motion, audio, asset generation constraints
  • Artifacts are canonical: brief, script, scene_plan, asset_manifest, edit_decisions, render_report, publish_log
  • Every tool inherits from tools/base_tool.py (ToolContract)
  • Checkpoint policy lives in pipeline manifest (human_approval_default per stage) + skills/meta/checkpoint-protocol.md
  • Reviewer is a meta skill (skills/meta/reviewer.md), advisory, max 2 rounds
  • Cost tracker (tools/cost_tracker.py) manages budget: estimate -> reserve -> reconcile
  • Canonical artifacts validated against JSON schemas in schemas/artifacts/

Key Files

File Purpose
config.yaml Global configuration
lib/config_model.py Runtime config loader (Pydantic)
lib/checkpoint.py Checkpoint writer/reader
lib/pipeline_loader.py Pipeline manifest loader + helpers
lib/media_profiles.py Platform-specific render profiles
styles/playbook_loader.py Style playbook loader + validator + design intelligence (color/type/a11y)
tools/base_tool.py ToolContract base class
tools/tool_registry.py Tool discovery and reporting
tools/cost_tracker.py Budget governance
tools/video/video_stitch.py Multi-clip assembly (stitch, spatial, validate, preview)
tools/video/video_compose.py Runtime-aware composition orchestrator — routes to Remotion / HyperFrames / FFmpeg based on edit_decisions.render_runtime
tools/video/hyperframes_compose.py HyperFrames runtime — templated workspace materialization plus authored-workspace unified check/render, FFmpeg floor check
tools/graphics/threejs_world.py Local semantic 3D-world authoring with explicit blockout/production fidelity tiers, region-aware terrain, diagnostics, and HyperFrames atelier workspaces
tools/graphics/threejs_asset_catalog.py CC0 GLTF/GLB catalog acquisition, inventory, and provenance for production-fidelity world builds
tools/graphics/atlas_3d.py Atlas Cloud Tripo H3.1 text-to-3D for unique textured/PBR GLB assets
tools/graphics/fal_3d.py fal.ai Hunyuan 3D and SAM 3D routes for image-conditioned and multi-object GLB generation
tools/graphics/blender_world.py Blender 4.5 LTS production world assembly, terrain, lighting, camera, and Eevee Next rendering
tools/character/character_animation.py Local character-animation tools — character specs, SVG rig plans, pose libraries, action timelines, HyperFrames packages, and QA reports
lib/hyperframes_style_bridge.py Playbook → CSS custom properties + DESIGN.md bridge for HyperFrames workspaces
remotion-composer/src/components/ 8 Remotion components (TextCard, StatCard, ProgressBar, CalloutBox, ComparisonCard + charts/)
.agents/skills/hyperframes*/ Vendored HyperFrames Layer 3 skills (authoring contract, CLI, registry, website-to-video)
.agents/skills/threejs-world-generation/ Layer 3 coarse-to-fine semantic world construction and render-guided refinement workflow
skills/core/hyperframes.md Layer 2 — when OpenMontage should pick HyperFrames vs Remotion, artifact → workspace mapping
schemas/styles/playbook.schema.json Playbook schema v2 with design tokens (chart_palette, scale_system, weight_matrix, color_rules)
tests/qa/ Quality validation test scripts for tool-by-tool output inspection

Available Pipelines

Pipeline Manifest Type
talking-head pipeline_defs/talking-head.yaml Footage-based
animated-explainer pipeline_defs/animated-explainer.yaml AI-generated
screen-demo pipeline_defs/screen-demo.yaml Screen-recording
clip-factory pipeline_defs/clip-factory.yaml Short-form batch extraction
podcast-repurpose pipeline_defs/podcast-repurpose.yaml Podcast repurposing
cinematic pipeline_defs/cinematic.yaml Cinematic edit
animation pipeline_defs/animation.yaml Animation-first
character-animation pipeline_defs/character-animation.yaml Local rigged character animation
hybrid pipeline_defs/hybrid.yaml Source-plus-support hybrid
avatar-spokesperson pipeline_defs/avatar-spokesperson.yaml Avatar presenter
localization-dub pipeline_defs/localization-dub.yaml Localization and dubbing
framework-smoke pipeline_defs/framework-smoke.yaml Test harness

When Building New Pipelines

  1. Create a YAML manifest in pipeline_defs/ (validated by pipeline_manifest.schema.json)
  2. Create stage director skills in skills/pipelines/<pipeline-name>/ (7 skills: idea through publish)
  3. Reference meta skills (reviewer, checkpoint-protocol) in the manifest
  4. Add compatible playbooks to the manifest
  5. Add contract tests in tests/contracts/

When Building New Tools

  1. Inherit from tools/base_tool.py BaseTool
  2. Put the tool in the correct capability package (tools/audio/, tools/video/, tools/enhancement/, tools/analysis/, tools/graphics/, tools/avatar/, tools/subtitle/)
  3. Prefer the selector-plus-provider pattern:
    • one capability router tool for agent convenience
    • one concrete tool per real provider/runtime path
  4. Set all contract fields (name, version, tier, capability, provider, supports, fallback_tools, agent_skills, etc.)
  5. Implement execute() returning a ToolResult
  6. Let discovery happen through tools/tool_registry.py; do not depend on ad hoc imports
  7. Add a JSON schema in schemas/tools/ if the tool has complex I/O
  8. Add tests only after the runtime path is correct