yellowjacket/.planning/milestones/v1.0-phases/06-sql-consolidation-code-quality/06-02-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
06-sql-consolidation-code-quality	02	codegen	go-ast codegen typescript go-generate lefthook		Go→TypeScript event constant generator (genevents) go:generate directive for automatic event sync LibraryConfigChanged gap automatically fixed Pre-commit codegen-check hook covers event constants	frontend backend-events	added patterns go/ast go/parser go/token AST-based codegen for cross-language constant sync atomic file writes via temp+rename	created modified backend/events/cmd/genevents/main.go backend/events/events.go frontend/src/events.ts	Iterate f.Decls directly (not map) for deterministic declaration-order output Strip trailing period from Go doc comments for cleaner TypeScript comments Atomic writes via temp file + os.Rename to prevent partial output	Cross-language constant sync: Go source of truth → go/ast parser → TypeScript codegen go:generate directive per package with relative paths to output	QUAL-02	2min	2026-03-05

Phase 06 Plan 02: Event Codegen Summary

Go→TypeScript event constant generator using go/ast, fixing LibraryConfigChanged gap and wiring pre-commit drift detection

Performance

• Duration: 2 min
• Started: 2026-03-05T00:20:57Z
• Completed: 2026-03-05T00:23:43Z
• Tasks: 2
• Files modified: 3

Accomplishments

• Built genevents codegen tool parsing Go AST for deterministic TypeScript output
• Fixed missing LibraryConfigChanged constant — now automatically generated from Go source
• Verified codegen-check pre-commit hook detects drift when Go constants change without regenerating TS
• All 21 event constants synced between Go and TypeScript, frontend typecheck passes

Task Commits

Each task was committed atomically:

1. Task 1: Create event codegen tool - 3e9edd0 (feat)
2. Task 2: Wire codegen-check pre-commit hook - No changes needed (lefthook.yml already correctly configured; task was verification-only)

Files Created/Modified

• backend/events/cmd/genevents/main.go - Go→TypeScript event constant generator using go/ast
• backend/events/events.go - Added //go:generate directive for automatic codegen
• frontend/src/events.ts - Regenerated with all 21 constants including LibraryConfigChanged

Decisions Made

• Iterated f.Decls directly (not collected into map) for deterministic declaration-order output
• Stripped trailing periods from Go doc comments for cleaner TypeScript comments
• Used atomic writes (temp file + os.Rename) to prevent partial output on failure
• No lefthook.yml changes needed — existing codegen-check hook already runs go generate ./... which now includes the event generator

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Event codegen complete, ready for remaining Phase 6 plans
• Pre-commit hook validates all generated code (templ, sqlc, events) in <2 seconds

Self-Check: PASSED

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Phase: 06-sql-consolidation-code-quality Completed: 2026-03-05