Test shards 3 and 4 were silently failing on every open PR because vitest's
CLI parser was treating `--shard X/Y` as positional file filters whenever the
arg arrived after a `--` separator. Removing the `--` in ci-test-shard.mjs
restores per-shard slicing; verified locally that shard 1/4 and 2/4 now run
distinct subsets.
The two consistently-failing engine tests:
1. self-healing in-review-branch-rebind ambiguous case-variant detection:
dedup keyed on lowercase branch name collapsed two physically distinct
refs (allowed on Linux ext4) into one candidate, so the "applied" path
ran instead of "ambiguous-candidates". Dedup now keys on the resolved
SHA — macOS APFS still collapses (same ref, same SHA), Linux keeps both
(distinct SHAs) and the ambiguity skip path fires as designed.
2. worktree-acquisition resume-misbinding spy: the production
verifyResumeBranchNotMisbound returns early when `git merge-base HEAD main`
fails, which is exactly what happens on shallow checkouts. Bumping the
test-shards checkout to fetch-depth: 0 makes CI mirror the local git
state these engine tests rely on.
Also adds `push: branches: [main]` to PR Checks so regressions like this
(which slipped into v0.33.0 with no post-merge run) go red immediately
on landing instead of being discovered on the next PR.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Both ternary branches in planShardAssignments() omitted weight from the
pushed entry objects despite using entry.weight for bin-packing. Downstream
consumers that relied on shard entry weight (e.g., balance verification)
had to reconstruct it from computeSplitPlan output.
Stabilized the ResearchView layout by refactoring CSS and component structure, with 175 lines of fixes spanning the CSS module, component TSX, and new regression tests. Also includes a patch changeset for the release note.
Fusion-Task-Id: FN-4134
Fusion-Task-Lineage: ca3ad67b-766b-4da6-be7f-c3927d718acd
Implements weighted shard planning for the CI test sharding script, with deterministic test coverage and documentation updates to `contributing.md`.
Fusion-Task-Id: FN-4043
- Expand test-changed coverage and shard selection assertions for CI workflows
- Improve vitest worker temp-directory utilities and related core/CLI tests
- Refine test isolation guardrails and runtime ignore handling for live .fusion noise
- Update contributing guidance and root test script usage for the verified workflow
Fusion-Task-Id: FN-3607
Merges FN-3470 in two steps: first, runtime plugins now prefer source path aliases over build artifacts, with hardening tests for vitest alias resolution and plugin view registry updates; second, a new `ensure-test-artifacts.mjs` bootstrap script guarantees required test files exist before test runs
Fusion-Task-Id: FN-3470
