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vac-optimizer/docs/adr/0009-bun-runtime-and-native-tooling.md
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nessarandClaude Opus 5.5 c949480e49 docs(adr): propose Bun runtime and native tooling
Record the proposed decision to run project-owned JavaScript under Bun
with its native test runner, linter, formatter, type checker and HTTP
server, keeping Angular's standard build pipeline, plus the development
spec for the migration tickets.

Refs #289

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-17 12:01:42 +02:00

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Markdown

---
status: proposed
---
# Bun Runtime and Native Tooling
VacOptimizer will use Bun as the runtime for project-owned JavaScript in
development, CI, and production, adopting its native test runner, linter,
formatter, type checker, and HTTP server even without measured performance gains.
This deliberately accepts Bun-specific tooling and migration work while retaining
Angular's standard compiler and build pipeline, including TypeScript 6 for
Angular compilation alongside `bun check` for standalone TypeScript checking.
Existing behavior, tests, lint rules, coverage reporting, and benchmark budgets
must be preserved; incompatibilities must be fixed or reported as blockers before
declaring completion, and a Node.js fallback does not meet the runtime requirement.
The [development spec](../bun-adoption.md) records the agreed boundaries,
acceptance criteria, and remaining verification.