Description

Create a package to capture and store generation events. This data drives the evolution system.

Depends on: Milestone 2 complete

Tasks

• Create internal/telemetry/ package
• Define GenerationEvent struct with all relevant fields
• Create SQLite storage backend
• Implement event capture with minimal overhead
• Add privacy controls (can be disabled)
• Create retention policy (auto-delete old events)

Acceptance Criteria

• Every generation attempt is captured (when enabled)
• Events include: command, inputs, kit, success/failure, errors, duration
• Data stored in $XDG_CONFIG_HOME/lvt/telemetry.db (use os.UserConfigDir() in Go`
• User can disable with LVT_TELEMETRY=false

Files to Create

internal/telemetry/
├── telemetry.go       # Main API
├── events.go          # Event types
├── store.go           # Storage interface
├── sqlite.go          # SQLite implementation
├── schema.sql         # Database schema
└── telemetry_test.go

Schema

CREATE TABLE generation_events (
    id TEXT PRIMARY KEY,
    timestamp DATETIME NOT NULL,
    command TEXT NOT NULL,
    inputs TEXT NOT NULL,  -- JSON
    kit TEXT,
    lvt_version TEXT,
    success BOOLEAN NOT NULL,
    validation_result TEXT,  -- JSON
    errors TEXT,  -- JSON
    duration_ms INTEGER,
    files_generated TEXT  -- JSON
);

-- Indexes for common queries
CREATE INDEX idx_events_timestamp ON generation_events(timestamp);
CREATE INDEX idx_events_success ON generation_events(success);
CREATE INDEX idx_events_command ON generation_events(command);
CREATE INDEX idx_events_kit ON generation_events(kit);