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Ekklesia/packages
ekklesiaandClaude Opus 5.5 317a4ce410
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fix: ADR 0050 callback-error precedence, and the honest limits of transaction control
Narrow contract and implementation adjustments from review. No SDK, manifest,
packaging, or Signage work.

Callback-error precedence:
- A transaction or savepoint callback that rejects keeps its own error, even
  while sibling work it started is still settling (one failed half of a
  Promise.all). Core drains that work, rolls back, and never commits or
  releases.
- A callback that resolves with work outstanding (a forgotten await) still
  fails with MODULE_DATABASE_SCOPE_WORK_OUTSTANDING and rolls back.

Transaction-control SQL:
- ADR 0050 forbids it through query() as a conformance rule for trusted code,
  not a security guarantee. Core does not parse SQL, so PostgreSQL has run
  the statement before Core sees it. Core detects the violation from the
  command tag or the transaction status, and claims nothing it cannot do: a
  module's own COMMIT has committed.
- After a violation, the transaction's scopes refuse every later statement
  without sending it (it would otherwise autocommit). Core never commits the
  transaction itself, and the connection is destroyed rather than reused,
  for top-level violations too.
- The commit and rollback guarantees apply to conforming use.

Duplicate object-mode columns: documented as found only after execution, so a
mutation can have taken effect; atomicity needs an ABI transaction.

Tests prove each of these against PostgreSQL: Promise.all failures in a
transaction and a savepoint keep 23505; a forgotten await still rolls back; a
module COMMIT's prior work is committed while nothing after it runs; a backend
PID changes after every violation; duplicate RETURNING columns persist at the
top level and roll back in a transaction.

ADR 0050 stays Accepted: the executor conforms to the revised text.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-10-07 16:12:01 -05:00
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