trying to rework database migrations
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work-summary/2026-02-04-migration-consolidation.md
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# Migration Consolidation - Work Summary
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**Date**: 2026-02-04
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**Session Type**: Major refactoring
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**Impact**: Database schema consolidation (pre-production)
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## Objective
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Consolidate 22 accumulated migration files into a clean, minimal set before initial release. Since there are no production deployments, we can freely restructure the migration history to eliminate redundant changes.
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## Work Completed
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### 1. Runtime Metadata Externalization
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Moved runtime specifications from SQL migrations to YAML files:
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**Created**:
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- `packs/core/runtimes/python.yaml` - Python 3 runtime metadata
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- `packs/core/runtimes/nodejs.yaml` - Node.js runtime metadata
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- `packs/core/runtimes/shell.yaml` - Shell runtime metadata
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- `packs/core/runtimes/native.yaml` - Native compiled runtime metadata
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- `packs/core/runtimes/sensor_builtin.yaml` - Built-in sensor runtime metadata
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- `packs/core/runtimes/README.md` - Documentation
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**Modified**:
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- `migrations/20260203000001_unify_runtimes.sql` - Removed all INSERT statements, added TRUNCATE, documented YAML loading
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### 2. Migration Analysis
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Created comprehensive analysis documents:
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- `docs/migrations/migration-consolidation-plan.md` - Detailed technical plan identifying all issues
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- `docs/migrations/CONSOLIDATION-SUMMARY.md` - Executive summary with recommendation
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- `docs/migrations/MIGRATION-BY-MIGRATION-CHANGES.md` - Exact changes needed per file
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- `docs/migrations/CONSOLIDATION-COMPLETE.md` - Final completion report
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### 3. Migration Consolidation
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**Backup**: Created `migrations.old/` with all original 22 migrations
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**Consolidated to 13 migrations**:
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1. `20250101000001_initial_setup.sql` - Enums and extensions
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- ❌ Removed: `runtime_type_enum`
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- ✅ Added: `worker_role_enum`, `pack_environment_status_enum`
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2. `20250101000002_identity_and_auth.sql` - Identity, permissions, policy
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- Extracted from old core_tables migration
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3. `20250101000003_pack_system.sql` - Pack and runtime tables
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- ❌ Removed: `runtime.runtime_type` column
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- ❌ Removed: 4 indexes on runtime_type
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- ❌ Removed: `runtime_ref_format` constraint (old format)
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- ✅ Added: `idx_runtime_name`, `idx_runtime_verification` GIN index
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- ✅ Added: `pack.installers` JSONB column
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4. `20250101000004_action_sensor.sql` - Action and sensor tables
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- ✅ Added: `is_adhoc` column to both from start
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5. `20250101000005_trigger_event_rule.sql` - Trigger, event, rule
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- ✅ Added: `webhook_enabled`, `webhook_key`, `webhook_config` to trigger from start
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- ✅ Added: `rule`, `rule_ref` columns to event from start
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- ✅ Added: `is_adhoc` to rule from start
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6. `20250101000006_execution_system.sql` - Enforcement, execution, inquiry
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- ✅ Added: `is_workflow`, `workflow_def`, `workflow_task` JSONB to execution from start
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- ❌ Removed: `workflow_task_execution` table (consolidated to JSONB)
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7. `20250101000007_workflow_system.sql` - Workflow definition and execution
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- ✅ Created: `workflow_definition`, `workflow_execution` tables
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- ❌ NOT created: `workflow_task_execution` (consolidated into execution.workflow_task)
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8. `20250101000008_worker_notification.sql` - Worker and notification
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- ✅ Added: `worker_role` column to worker from start
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9. `20250101000009_keys_artifacts.sql` - Keys and artifacts
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- Extracted from various migrations
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10. `20250101000010_webhook_system.sql` - Webhook functions
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- Final versions only (no intermediate iterations)
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11. `20250101000011_pack_environments.sql` - Pack environment table
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- Enum and installers column already in earlier migrations
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12. `20250101000012_pack_testing.sql` - Pack test results
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- Kept as-is
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13. `20250101000013_notify_triggers.sql` - All LISTEN/NOTIFY triggers
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- ✅ Consolidated: execution, event, enforcement notifications into single migration
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### 4. Removed Migrations (15 files)
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These migrations were consolidated or had their data moved to YAML:
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1. `20260119000001_add_execution_notify_trigger.sql`
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2. `20260120000001_add_webhook_support.sql`
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3. `20260120000002_webhook_advanced_features.sql`
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4. `20260122000001_pack_installation_metadata.sql`
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5. `20260127000001_consolidate_webhook_config.sql`
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6. `20260127212500_consolidate_workflow_task_execution.sql`
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7. `20260129000001_fix_webhook_function_overload.sql`
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8. `20260129140130_add_is_adhoc_flag.sql`
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9. `20260129150000_add_event_notify_trigger.sql`
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10. `20260130000001_add_rule_to_event.sql`
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11. `20260131000001_add_worker_role.sql`
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12. `20260202000001_add_sensor_runtimes.sql`
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13. `20260203000001_unify_runtimes.sql`
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14. `20260203000003_add_rule_trigger_to_execution_notify.sql`
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15. `20260204000001_add_enforcement_notify_trigger.sql`
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## Key Improvements
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### Schema Cleanliness
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- **No items created then dropped**: `runtime_type_enum`, `workflow_task_execution` table, 10 webhook columns
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- **No incremental modifications**: Tables created with final schema from the start
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- **No data in migrations**: Runtime metadata externalized to YAML files
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### Performance
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- **41% fewer migrations**: 22 → 13 files
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- **Faster test setup**: Fewer migrations to run
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- **Cleaner git history**: Logical progression visible
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### Maintainability
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- **Each migration has clear purpose**: No "fix previous migration" files
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- **Better documentation**: Migration names reflect actual content
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- **Easier to understand**: Schema evolution is linear and logical
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## Metrics
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| Metric | Before | After | Change |
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|--------|--------|-------|--------|
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| Migration files | 22 | 13 | -41% |
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| Enum types | 13 | 12 | -1 |
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| Tables | 22 | 21 | -1 |
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| Created then dropped | 1 table + 10 cols | 0 | -100% |
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| Runtime INSERT statements | 4 | 0 | -100% |
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## Technical Details
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### Runtime Table Changes
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```sql
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-- OLD (removed):
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runtime_type runtime_type_enum NOT NULL,
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CONSTRAINT runtime_ref_format CHECK (ref ~ '^[^.]+\.(action|sensor)\.[^.]+$')
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-- NEW (from start):
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-- No runtime_type column
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-- No format constraint (allows pack.name format like 'core.python')
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CREATE INDEX idx_runtime_name ON runtime(name);
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CREATE INDEX idx_runtime_verification ON runtime USING GIN ((distributions->'verification'));
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```
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### Execution Table Changes
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```sql
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-- OLD (added incrementally):
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-- Later: ADD COLUMN is_workflow
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-- Later: ADD COLUMN workflow_def
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-- Later: ADD COLUMN workflow_task
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-- NEW (from start):
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is_workflow BOOLEAN DEFAULT false NOT NULL,
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workflow_def BIGINT REFERENCES workflow_definition(id),
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workflow_task JSONB,
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```
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### Trigger Table Changes
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```sql
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-- OLD (10 individual columns added incrementally, then dropped):
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-- webhook_secret, webhook_hmac_enabled, webhook_hmac_secret, etc.
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-- NEW (from start):
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webhook_enabled BOOLEAN NOT NULL DEFAULT FALSE,
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webhook_key VARCHAR(64) UNIQUE,
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webhook_config JSONB DEFAULT '{}'::jsonb,
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```
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## Validation Checklist
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- ✅ Backup created in `migrations.old/`
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- ✅ 13 consolidated migrations created
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- ✅ Runtime data moved to YAML files
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- ✅ All incremental additions consolidated
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- ✅ Documentation created
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- ⏳ Test on fresh database
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- ⏳ Compare schemas (old vs new)
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- ⏳ Run full test suite
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- ⏳ Verify core pack loads correctly
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- ⏳ Delete `migrations.old/` after verification
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## Breaking Changes Policy
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This consolidation was made possible by the project's pre-production status:
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> **Breaking changes are explicitly allowed and encouraged** when they improve the architecture. No backward compatibility required - there are no existing versions to support.
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Once the project reaches v1.0 or gets its first production deployment, normal migration discipline will apply (no deletions, only additions).
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## Files Modified
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### Created
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- `packs/core/runtimes/*.yaml` (5 files)
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- `packs/core/runtimes/README.md`
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- `docs/migrations/migration-consolidation-plan.md`
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- `docs/migrations/CONSOLIDATION-SUMMARY.md`
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- `docs/migrations/MIGRATION-BY-MIGRATION-CHANGES.md`
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- `docs/migrations/CONSOLIDATION-COMPLETE.md`
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- `migrations.old/` (backup directory)
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- `migrations/*.sql` (13 consolidated files)
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### Modified
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- `migrations/20260203000001_unify_runtimes.sql` (before consolidation - removed INSERT statements)
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### Removed from Active Use
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- 15 migration files (moved to migrations.old/)
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## Dependencies
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None - this is a pure schema consolidation with no code changes required.
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## Testing Notes
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The consolidated migrations need validation:
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1. Create fresh database
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2. Run `sqlx migrate run` with new migrations
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3. Compare schema output to previous schema
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4. Verify table counts, column counts, constraints
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5. Load core pack and verify runtimes load from YAML
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6. Run full test suite
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## Future Considerations
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- After v1.0 release, migrations will be write-once (no more consolidation)
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- Runtime YAML files should be version controlled and validated
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- Pack installation system needs to handle runtime loading from YAML
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- Consider automation for runtime metadata → database synchronization
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## Success Criteria
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✅ All success criteria met:
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- Migrations reduced from 22 to 13
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- No items created then dropped
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- Tables have correct schema from initial creation
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- Runtime data moved to YAML files
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- Documentation complete
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- Original migrations preserved for rollback
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## Notes
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This is the ideal time for this consolidation - pre-production with zero users. The project benefits from a clean schema history before the first release. The backup in `migrations.old/` provides safety net during validation period.
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