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The Encore row is superseded by 0124: Encore is the generated runtime target in .stackra/encore/ (0091), and hand-written Encore in service source or packages is rejected.
Amended by 0154: the sandboxed code step (QuickJS-WASM and Pyodide, no filesystem, allow-listed fetch) is the only place tenant code may run. It is listed as an allowed form in the row below.
The “runtime schema engine” row was rewritten by 0110, which supersedes the old row (“A runtime schema engine, server-driven UI, JSONB-for-everything”, Rejected). It now allows data that only references registered code.

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Context

Assistants and new contributors helpfully add well-known tools. Each one adds a second way to do something that already has one, and each costs a migration to remove. The decisions against them are scattered across earlier repositories as prose. This page is the one table. Each row says what is not introduced, what to use instead, and what event reopens it.

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Decision

Do not introduce anything in the Not introduced column. If a task seems to need one, stop and route to the architecture-guardian agent. Rejected means no for the foreseeable future. Deferred means not yet, and the trigger names when. A row changes only by a new ADR that supersedes this page.

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Consequences

  • A proposal that touches one of these rows starts with a new ADR, not a pull request.
  • Product-specific rejections (billing vendors, wallet design and similar) are not carried here; a product repository records its own.

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Enforcement

  • FORBIDDEN_DEPENDENCIES in tools/scripts/validate-repository.mjs fails a member that lists eslint, prettier, jest, @nestjs/core, @nestjs/common, reflect-metadata, prisma, @prisma/client, drizzle-orm, express, fastify, typeorm or knex.
  • packages/tooling/oxlint/src/boundaries.jsonc bans encore.dev in packages.
  • Planned: extend the list with encore.dev for members other than a future service runtime, and with the other rows that name a package, after this table is reviewed.
  • The architecture-guardian agent reads this page.

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Supersedes and sources

Supersedes: none. Sources: user rules not-built-yet.md; academorix .agents/rules/not-built-yet.md; figentra docs/adr/0001-technology-stack-and-toolchain, 0036 to 0039; platform docs/adr/0013. Every row was re-checked against Stackra’s layout.