---
id: normalize-tokio-dev-deps
name: Normalize the engines' dev-dep tokio feature sets (review 004 item 16)
status: completed
depends_on: []
scope: single
risk: trivial
impact: isolated
level: implementation
tags: [review-004-fixes, hygiene, metadata]
---

## Description

The cosmetic metadata asymmetry from
`docs/reviews/004-pre-release-general-review.md` §"Findings recorded,
not fixed" item 16: the three engines' dev-dep tokio features disagree
— sqlite `rt-multi-thread+macros+time`, pg `test-util`, mem
`rt+macros`. Harmless (the contract suite carries the test runtime)
but an easy-to-trip asymmetry when copying test code between engines.

Normalize to one uniform dev-dep feature set across the three engines.
Pick the union that keeps every engine's own tests green (likely
`rt-multi-thread + macros + time + test-util` — verify per engine;
feature unification means the workspace build is unaffected either
way). Dev-deps only: no published-surface change, no runtime-dep
change.

## Acceptance Criteria

- [x] The three engines' `[dev-dependencies]` tokio feature sets are
      identical
- [x] Each engine's own test target green (`cargo test -p` per engine;
      the pg lib target's server-less SKIP posture is fine)
- [x] Workspace gates green (build, clippy `-D warnings`, fmt)

## References

- docs/reviews/004-pre-release-general-review.md §"Findings recorded,
  not fixed" item 16 (the finding)
- alkstore-sqlite/Cargo.toml:28, alkstore-postgres/Cargo.toml:22,
  alkstore-mem/Cargo.toml:19 (the three differing sets)

## Notes

<!-- implementation decisions of record -->

The union picked exactly matches the task's expectation:
`rt-multi-thread + macros + time + test-util` — the pg engine's
dev-dep `test-util` coverage is preserved, no engine's tests needed
anything beyond the union, and no code change was required anywhere.

## Summary

Normalized all three engines' `[dev-dependencies]` tokio feature sets
to `["rt-multi-thread", "macros", "time", "test-util"]` (previously:
sqlite `rt-multi-thread+macros+time`, pg `test-util`, mem `rt+macros`)
— dev-dep metadata only, no published-surface or runtime-dep change.

Verified (2026-10-11): workspace `cargo build`, `cargo clippy
--all-targets -- -D warnings`, `cargo fmt --check` all clean;
`cargo test -p` green for alkstore-mem (102 unit + 26 ct),
alkstore-sqlite (203 unit + 26 ct + 1 doc), alkstore-postgres
(135 unit + 26 ct + 9 integration, full target incl. the server-less
SKIP posture).