-- Migration 001: Create prompt artifacts table
-- Implements FR-1: InformationSpace Addressability
-- Date: 2026-02-08

-- Prompt artifacts table for content-based addressing
CREATE TABLE IF NOT EXISTS prompt_artifacts (
    id TEXT PRIMARY KEY,
    space_id TEXT NOT NULL,
    name TEXT NOT NULL,
    artifact_type TEXT NOT NULL,
    content_digest TEXT NOT NULL,
    content_size INTEGER DEFAULT 0,
    metadata JSON,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(space_id, name)
);

-- Indexes for performance
CREATE INDEX IF NOT EXISTS idx_artifacts_space ON prompt_artifacts(space_id);
CREATE INDEX IF NOT EXISTS idx_artifacts_digest ON prompt_artifacts(content_digest);
CREATE INDEX IF NOT EXISTS idx_artifacts_type ON prompt_artifacts(artifact_type);
CREATE INDEX IF NOT EXISTS idx_artifacts_name ON prompt_artifacts(space_id, name);

-- Comments (for documentation)
-- prompt_artifacts.id: Unique UUID identifier for the artifact
-- prompt_artifacts.space_id: Reference to information space containing this artifact
-- prompt_artifacts.name: Human-readable name, unique within space
-- prompt_artifacts.artifact_type: Classification: content, template, generated, schema, config
-- prompt_artifacts.content_digest: SHA-256 hash of content for change detection
-- prompt_artifacts.content_size: Size of content in bytes
-- prompt_artifacts.metadata: JSON extensible metadata (description, tags, author, version, custom)
-- prompt_artifacts.created_at: Artifact creation timestamp
-- prompt_artifacts.updated_at: Last modification timestamp