Resolver push-gate tests: colliding fixture paths through git plumbing (macOS full suite red since #732)

[seathatflowsinourveins]

Scope

• What this PR changes: the resolver push-gate tests build their case- and normalization-colliding fixture commits through git plumbing, so the colliding names exist in the tree on any filesystem.
  • Main's macOS full suite has failed test_case_and_unicode_collisions (case_collision, unicode_nfc_collision) on every commit since OpenHands resolver: owned-path gate on the exact pushed commit, instruction files and aliases refused, driver behind a start-up self-test #732 (4fd7106). That failure also shows on every PR.
  • The cause: the fixture wrote the paths through the filesystem, and macOS APFS is case- and normalization-insensitive. Each pair collapsed into one path, so the commit held no collision and the gate correctly passed.
  • The gate (push_gate.py) is unchanged.
• Base commit: cb339488e3e0 (origin/main).
• Lane: lane:foundation, the resolver lane. Tests only, plus the registry row in the last commit.

SOTA sources

• git/git v2.43.0 t/t2107-update-index-basic.sh:59-69: index entries through update-index --add --cacheinfo, with no working-tree file. Also git's documentation of hash-object -w --stdin, write-tree, commit-tree and update-ref.
• git's core.ignorecase and core.precomposeunicode settings, both on by default on macOS. They are set to false on every fixture git call.

Evidence-class table

Claim	Evidence class	Command / receipt
main's macOS full suite fails only this test on the main side	hosted CI (observed)	adoption-bootstrap macOS runs 37321600538 (#726) and 37320629278 (#713): the same two subtests; main runs at 4fd7106, c148e04 and cb33948 failed
the helper keeps both exact names regardless of the working tree	local_integration (Linux probe)	both names and distinct blobs in ls-tree with a pre-existing same-named working-tree file and both folding settings true; restoring the old fixture makes the new tree assertion fail
the suite passes	local_integration	python3 -m unittest tests.test_runtime_worker_openhands_push_gate: 122 run, 121 OK, 1 existing skip (PyYAML absent)
macOS confirmation	pending	this PR's own macOS run (advisory, by the user's 2026-10-05 decision)

Local commands run

$ python3 -m unittest tests.test_runtime_worker_openhands_push_gate   OK (skipped=1)
$ python3 scripts/validate.py                                         exit 0
$ python3 scripts/evidence_manifest.py --check                        exit 0
$ git diff --check                                                    exit 0

Review

• Built by GPT-6.1 Sol through the packaged SDK worker (round resolver-macos-r1) and committed by the coordinator (Claude session 5f).
• A Claude Opus cross-family read follows.

Checklist

• No GitHub Actions or workflow changes.
• No secrets printed, logged or committed.
• The gate's behavior is unchanged; tests only.

Recorded residuals (bounded review, 2026-10-05)

Claude Opus 5.5 cross-family read (session 5f) at ffd5cd3 at ffd5cd3e99c3 returned ACCEPT with no p1. Under the bounded review rule these p2 items land as recorded residuals, each owed as a follow-up:

• tests/test_runtime_worker_openhands_push_gate.py:1589 and :1606: Non-blocking hardening, not a defect.

🤖 Generated with Claude Code

[seathatflowsinourveins]

Claude session native-agent-stack-5f: landing at head ffd5cd3e99c3aa79f12ae1eda8c092d82c5b997e. The command center (wsl-architecture-design) gave its ACK at this exact head; under the user's 2026-10-04 decision it owns merges that touch the hot registry. The read-only cross-family review (GPT-6.1 Sol max, the packaged Codex SDK worker) returned ACCEPT at this exact head, with no P1 item.

Observed main 1796303f957c522e78b92667e553c06840fae3a2. coordination/merge_tree_landing_check.py (sha256 a11649fcf2e5844c…) exit 0:

main 1796303f957c522e78b92667e553c06840fae3a2 head ffd5cd3e99c3aa79f12ae1eda8c092d82c5b997e base cb339488e3e004b04e8a4e5b4fd246442a275e3c merged-tree 5d157c3b6cf2da4cd130c893fd39d2e7b2332e6c merge-tree-exit 0
ok   1: clean three-way merge
ok   2: merged-vs-main paths 2, outside PR-owned 0 []
ok   3: main drift 131 paths, overlap with PR-owned inputs (registry excluded) []
ok   4: registry foreign rows equal True, order preserved True, PR-owned rows 1, unowned top-level keys differing []
ok   5: merged files[] sorted by path with no duplicates: True (10184 rows)
LANDABLE
condition 5: merged files[] sorted and unique (tree 5d157c3b6cf2da4cd130c893fd39d2e7b2332e6c)

Required checks at this head: 7 pass . Unresolved review threads: 0.

[seathatflowsinourveins]

Claude session native-agent-stack-5f: post-merge observation. Landed as 0c93179662e765bbd460555eb225b2dbabc05527 (parent 1796303f957c522e78b92667e553c06840fae3a2), tree 5d157c3b6cf2da4cd130c893fd39d2e7b2332e6c. The landed tree equals the checked merged tree and the parent is the observed main.