Checkpoint Shard References Case-Folding

I dug into both, and reproduced the mechanism directly rather than taking the report at face value. Summary:

The issue (#2402) is real — I reproduced it

The mechanism checks out exactly as described. On this APFS volume:

ParseRef then rejects the ULID ref (ShardFor()=="6B" != "6b"), so List drops it. Confirmed at the go-git layer too, which is what refs_store.go:518/564 actually use.

Two corrections to the report, though:

The precondition is narrower than claimed. GenerateCheckpointID (checkpoint/generate.go:20) only mints hex when git-refs is not primary, and reads route legacy IDs to the branch store. So a hex ref only lands under refs/entire/checkpoints/ via entire doctor migrate-checkpoints. The affected population is "opted into git-refs and ran the migration on macOS/Windows", not "most repos".

Within that population the rate is much higher than the issue's "1-in-256". A ULID shard case-collides iff both chars are in [0-9A-F] (¼) and at least one is a letter (1-(10/16)² ≈ 0.61) → ~15% of new ULIDs, times the chance that bucket is already occupied (≈98% at 1000 migrated legacy checkpoints). So ~15% of new checkpoints in a well-migrated repo, and it compounds — once a bucket is mis-cased, every later ULID with that shard joins it.

The PR (#2403) is correct but fixes about half the bug

The one-line strings.EqualFold is sound, the tests are well-placed, and go test ./cmd/entire/cli/checkpoint/... passes on the branch. But ParseRef has only two production call sites, both in List. The direct-lookup path — RefName(cid) → repo.Reference(...) — is untouched, and there it is filesystem case-insensitivity that has been masking the problem, not ParseRef:

After any git gc / pack-refs (auto-gc included), packed-refs is an exact string match and the fallback disappears. That breaks four call sites the PR doesn't touch:

• resolveRefMaybeFetch (refs_store.go:380) → Read → entire checkpoint explain <id>, the issue's own repro command, still fails
• refBase (refs_store.go:146) → returns ZeroHash → the next write to that checkpoint starts a fresh orphan commit, forking the checkpoint's history. I reproduced this: the repo ends up with 6b/<ulid> at the old tip and 6B/<ulid> at a new orphan.
• GetCheckpointAuthor (refs_store.go:686) → zero Author
• the push refspec, which is the queued 6B/... name

And that fork interacts badly with this PR specifically: List's local loop appends unconditionally (the seen map is only used for remote dedup), so with EqualFold both refs parse to the same ID and the checkpoint is listed twice, at two different commits. Today only one is listed. Not a reason to block — the fork already happens without the PR — but it's a new visible symptom.

One piece of good news the issue misses: the remote copy is fine. The push refspec carries the canonical 6B name and resolves case-insensitively while loose, so the server gets the correct ref and a Linux clone reads it normally. This is a local-clone read bug, not remote data loss.

Recommendation

I'd take the PR — it's a real fix for the listing path and does no harm — but not close #2402 with it, and I'd ask for one of:

• narrow completion: make ref resolution try the single alternate-cased spelling on not-found (a ULID's shard has exactly one other casing, likewise hex), which covers Read/refBase/author/push; or
• land as-is and split the lookup half plus the doctor detection the issue suggests into a follow-up — worth it either way, because repos already in this state have forked refs that only a repair can reconcile.

The issue's "lowercase the shard for ULIDs too" suggestion doesn't work unmodified: it would orphan every existing uppercase-shard ULID ref on case-sensitive filesystems, i.e. all Linux clones and every server.

Want me to write this up as a PR review comment, or draft the follow-up patch?

Draft saved to pr2403-comment.md in the scratchpad (unwrapped prose, one paragraph per line, ready for --body-file). Here it is:

Thanks for the writeup in #2402 — I reproduced the collision on APFS and the diagnosis holds. The EqualFold change is the right call and I'd like to take it; could you extend it to the lookup path before we merge?

ParseRef has exactly two production call sites, both in gitRefsStore.List (refs_store.go:518 and refs_store.go:564). Every other consumer goes the other direction — RefName(cid) then repo.Reference(...) — and there it is the filesystem that has been masking the collision, not ParseRef. Once refs are packed, that masking stops:

(go-git, on APFS, with the ref physically at 6b/..., before and after git pack-refs --all. git gc --auto runs pack-refs on its own, so this is the steady state, not a corner case.)

So with this PR merged, four paths are still broken for an affected checkpoint:

• resolveRefMaybeFetch (refs_store.go:380) → Read → entire checkpoint explain <id>, the repro command in the issue, still reports "checkpoint not found".
• refBase (refs_store.go:146) → returns ZeroHash, so the next write to that checkpoint ID starts a fresh orphan commit instead of extending the existing one, forking the checkpoint across 6b/<id> and 6B/<id>.
• GetCheckpointAuthor (refs_store.go:686) → zero Author.
• The push refspec, which is the queued canonical 6B/... name.

That fork also interacts with this change specifically: List's local loop appends unconditionally (the seen map only dedups the remote-discovery pass), so once both refs exist, EqualFold makes them both parse to the same ID and the checkpoint is listed twice at two different commits. Today one of them is silently dropped instead. The fork itself happens without this PR too, so it isn't a regression in the stored data — but the new symptom is worth handling.

The narrow completion: a checkpoint ID has exactly one alternate casing for its shard (ULIDs are uppercase-only Crockford base32, legacy IDs are lowercase hex), so a single fallback spelling in ref resolution covers all four sites — resolve RefName(cid) first and, on ErrReferenceNotFound, retry the case-flipped shard before declaring the checkpoint absent.

Two things that can be this PR or a follow-up, your preference:

• The entire doctor detection you suggested in the issue. Repos already in this state can carry forked refs that neither half of the fix reconciles on its own, so something has to find them.
• Worth adding to the issue: the remote copy is fine. The push refspec carries the canonical 6B name and resolves case-insensitively while the ref is loose, so the server gets the correct ref and a Linux clone reads it normally. This is a local-clone read bug, not remote data loss.

Two corrections on the issue's impact section while we're here. GenerateCheckpointID (generate.go:20) only mints legacy hex when git-refs is not the primary store, and reads route legacy IDs to the branch store — so a hex ID reaches refs/entire/checkpoints/ only via doctor migrate-checkpoints. That makes the affected set "opted into git-refs and ran the migration on a case-insensitive filesystem" rather than most repos. Within that set, though, the rate is well above the issue's 1-in-256: a ULID shard collides iff both characters are in [0-9A-F] (1/4) and at least one is a letter (1 - (10/16)^2), so roughly 15% of new checkpoints once the buckets are populated — and it compounds, since every later ULID with a mis-cased shard joins the same directory.

Also, for the record so nobody tries it later: the "lowercase the shard for ULIDs too" direction from the issue does not work unmodified — it orphans every existing uppercase-shard ULID ref on case-sensitive filesystems, which is all Linux clones and every server. The read-side fallback is the safer shape.

Two notes before you post: it's long for a first external contribution — if you'd rather keep it to the ask, the last two paragraphs (the impact corrections and the ShardFor warning) are the ones to cut. And I haven't posted anything; say the word and I'll gh pr comment 2403 --body-file.

That's the right split, yes. The EqualFold half is genuinely needed no matter how you fix the rest — the on-disk name is the folded one, so ParseRef has to accept it — and the remaining work is maintainer-shaped (where the resolution fallback lands, what doctor reports, what a repair does to a forked ref). Not worth several review rounds with an external contributor.

One thing to handle before you merge: the PR body opens with Fixes #2402, so merging auto-closes the issue while its own repro command still fails. Either edit it to Refs #2402 first, or reopen after.

For your follow-up, the shortlist:

• Case-flip fallback in ref resolution (resolveRefMaybeFetch, refBase, GetCheckpointAuthor) — one alternate spelling, since ULID shards are uppercase-only and hex lowercase-only.
• Dedup in List's local loop. It appends unconditionally today; the seen map is only consulted by the remote-discovery pass. Once EqualFold lands, an already-forked checkpoint lists twice at two different commits, and the fallback above stops new forks but doesn't reconcile existing ones.
• doctor detection + repair for refs already forked or mis-cased.

Worth a short comment on the PR either way so the contributor knows why the issue stays open — the first four paragraphs of the draft do that without the impact-correction tail. Want me to trim it to that and post it alongside the approval, or draft the follow-up patch?

Draft PR opened: https://github.com/entireio/cli/pull/2484 — soph/checkpoint-shard-case-lookup, stacked on pr2403 so it rebases cleanly once #2403 merges (until then its diff also shows their commit; I said so in the body).

What's in it:

• resolveLocalRef (refs_store.go) — falls back to the one alternate-cased spelling. Exhaustive, not a heuristic: each ID format uses one case exclusively, so a shard bucket has exactly two possible names. Fixes Read/explain, refBase, GetCheckpointAuthor.
• writeRefName — writes go to the spelling the existing ref uses, so a write extends the checkpoint instead of forking it. A tolerant read alone isn't enough: the CAS would target a name holding nothing and create a twin.
• List dedup — prefers the canonical spelling so the listing agrees with what Read serves. Needed because #2403's EqualFold makes an already-forked checkpoint parse twice.
• doctor check (doctor_checkpoint_refs.go) — reports folded refs and split checkpoints. No rename command for the folded case: on the filesystem that causes it, update-ref + update-ref -d hit the same file while the refs are loose, so the "rename" is a delete. The split case gets compare-and-delete with git pack-refs --all first.

Two things worth knowing:

The three store-level tests each fail on #2403 alone — I reverted refs_store.go to their commit and confirmed, rather than assuming. My first cut of the dedup test was vacuous on APFS (the planted folded ref folded straight back onto the canonical one, so only one ref existed); the fixtures now plant the end state explicitly — packed folded ref, loose canonical — which is both how the fork really forms and the only shape that asserts the same thing on Linux CI.

mise run fmt && mise run lint (0 issues) and mise run test:ci pass, exit 0 including the Vogon canary. One earlier test:ci run reported a failure I didn't capture before two subsequent full runs came back green; if it recurs it's worth a look, but I couldn't reproduce it.

I left it as a draft since #2403 hasn't merged — say the word and I'll mark it ready.

Fixed and pushed as a separate commit (3529c0cba) on #2484.

You were right, and it's a gap my own change opened: batchPushRefs builds <ref>:<ref>, so local and remote spellings are deliberately identical — and writeRefName now publishes the folded name whenever that's where the local ref lives. So "remote holds the folded spelling" went from impossible to routine, while the fetch still asked only for the canonical one. Both halves you named check out: a clone with neither spelling reads an intact checkpoint as missing, and a discovery stub (which ParseRef accepts from the folded remote name) has nothing to hydrate from.

resolveRefMaybeFetch now walks both spellings, canonical first. Only the absence signal advances to the second — a transport failure still returns immediately and is still memoized, so an outage is paid once, not twice. There's a test for each direction, and I confirmed the fallback test fails against the previous commit before passing here.

Two things to flag rather than bury:

It costs a second round-trip on a genuine miss. An existing test, TestGitRefsStore_FetchFailureMemoized/remote absence not memoized, pinned that at 2 calls for 2 checkpoints and now sees 4. I updated it with the reasoning — the number still discriminates, since a memoized absence would leave 2 — but the cost is real. Absence was already O(N) round-trips (per-ref and deliberately unmemoized), so this doubles a linear cost rather than changing its shape. A glob refspec refs/entire/checkpoints/*/<id> would collapse it back to one, but a glob matching nothing is indistinguishable from a successful fetch, which is precisely the absence-only-on-positive-evidence property remote.FetchCheckpointRef is built around. I left it alone rather than blur that — say the word if you'd rather have the round-trip back.

I considered and rejected pushing <local>:<canonical> so remotes stay canonical and no fallback is needed. It splits the local and remote spellings, which fetchAndRebaseRefCommon — the push-rejection recovery path — assumes are the same when it fetches +<ref>:<tmp>. Keeping both sides identical leaves every existing path correct; the folded spelling propagating is cosmetic since both ends resolve it. I also softened the doctor wording, which previously implied a folded ref was always folded locally.

mise run lint (0 issues) and mise run test:ci pass, exit 0. Along the way two things were not mine: TestCreateAndAwaitMirror_AsyncTimeout (known load-sensitive phase flake, 3/3 green in isolation), and a spurious lint "failure" that was a leftover concurrent golangci-lint process rather than a finding. PR body updated with all of the above.

Checked all five. Two resolved, three left open — and one thing you should know about the worktree.

Resolved (both genuinely closed by 3529c0cba, which is on the remote):

• Cursor, "Fetch misses folded remote checkpoint refs" (High) — the same issue you relayed. Already flagged outdated by GitHub.
• Copilot, same finding on the remote-fetch path. It also asked that "the direct fetch callers should share the same fallback" — I checked, s.refFetcher has exactly one call site, so there's nothing else to share it with.

Left open:

• Cursor, "Migrate CAS fails on folded refs" (Medium) and the matching Entire finding 01M2JR4DCYFM (High) — same issue, and it's real. migrate.go builds its ref name with raw RefName(cid) while taking expected from refBase, which now resolves the folded spelling. On a folded+packed ref the CAS targets a name holding nothing and fails. It's a regression my refBase change introduced: previously refBase returned ZeroHash there, so migrate created a split rather than erroring.

• Entire finding 01M2JPC33KJE (Medium), the seen map in List — I don't think the stated failure mode can occur. It claims iteration order could make a checkpoint appear twice, but seen[cid] and indexByID[cid] are set on the same line pair, on the only path that appends, so seen is set exactly when the cid was appended. A double-append needs indexByID[cid] unset on the second encounter, which only happens if the first encounter returned early on an unreadable commit or tree — in which case nothing was appended. The coupling it describes is real; the bug isn't. Worth answering rather than silently resolving, so I left it. The tidy fix is to collapse the two maps, which have identical key sets, into one.

The thing to check: this worktree has uncommitted changes I didn't make, on migrate.go, migrate_test.go, strategy/push_common.go, strategy/manual_commit_push.go, and strategy/refs_push_test.go. They address the migrate finding (routing it through writeRefName) plus a new normalizeQueuedCheckpointRefs that rewrites stale canonical queue entries to the spelling that resolves locally — a case I hadn't covered. Another session or agent is evidently working here. I left it all untouched and committed nothing, so if that's a concurrent session, nothing of theirs is at risk; if it's abandoned, it looks like a reasonable start on the migrate finding and I can pick it up. Tell me which and I'll continue.

Yes, it's good. I verified it rather than just reading it — both new tests fail with the source reverted and pass with it, and mise run lint (0 issues) plus a full mise run test:ci are green (exit 0).

migrate.go — the one-line route through writeRefName covers all three places the finding named, not just the CAS: the expected hash now matches the name being updated, the alreadyImported branch enqueues a name that actually resolves, and the ErrObjectNotFound retry branch's repo.Reference(refName, true) gets the resolved name for free.

Three things in the push change I'd call out as right, because they're the parts that are easy to get wrong:

• resolveQueuedCheckpointRef only rewrites on a definite not-found. Using !errors.Is(err, ErrReferenceNotFound) to bail means a transient IO error returns the original name instead of rewriting a queue entry on a flaky read.
• Enqueue before remove. An interrupted normalization leaves the checkpoint queued twice, never dropped — and Drain dedups, so the duplicate costs nothing.
• Both spellings already queued is handled: the original check skips the redundant enqueue while still removing the stale canonical, and seen collapses the flush list to one.

And the redundancy I misread earlier is load-bearing: putting the resolution inside partitionLocalRefs rather than only in normalizeQueuedCheckpointRefs is what makes the other caller work — manual_commit_opf_refs.go:84 reaches it via Peek() and never normalizes, so without it the OPF rewrite would skip a folded ref.

Worth saying explicitly: this fixes a bug I missed, and it predates my branch. An old queue holds canonical names; if the local ref was folded and packed, partitionLocalRefs classified it as stale and dropped it from the queue — so the checkpoint was silently never pushed, permanently. That's a worse failure than the read-side ones we'd been chasing.

Three things left:

1. The seen-map finding (01M2JPC33KJE) is still untouched. I still read it as a non-defect — its stated failure mode needs indexByID[cid] unset on a second encounter, which only happens when the first encounter bailed on an unreadable commit or tree, in which case nothing was appended. The coupling it describes is real though, and the clean answer is to collapse seen and indexByID, which hold identical key sets, into one map. Your call: push back, or I do the collapse.

2. No OPF-path test for a folded queue entry. The shared helper is covered through the flush test, so the risk is low, but RewriteQueuedCheckpointRefsWithOPF is the one other consumer and this case isn't exercised there.

3. Minor: the flush path now does ~3 local ref lookups per queued ref instead of 1. Irrelevant for normal queues, noticeable only on a large backfill.

It's all still uncommitted. Want me to commit and push it, then resolve the Cursor "Migrate CAS" thread and finding 01M2JR4DCYFM?

Committed, pushed, and the review queue is clear.

Two commits on soph/checkpoint-shard-case-lookup (now at 89d6feebb), split by finding so each is reviewable on its own:

• 9fcc4856b — migrate through the resolving ref spelling
• 89d6feebb — push the queued ref spelling that resolves locally

All three GitHub threads resolved. On Entire, 01M2JR4DCYFM (migrate, High) is resolved with a pointer to the commit.

That leaves 01M2JPC33KJE (the seen map, Medium) — it's the only thing still open, and it has now gone stale, since the line it anchored to moved. I left it deliberately rather than resolving it, because nothing about it was fixed: I still read it as a non-defect, and letting a stale marker quietly retire it would look like agreement. Your call between pushing back on it and collapsing seen and indexByID into one map — they hold identical key sets, so the merge is small and removes exactly the coupling it objects to.

One thing to check before this goes out: I put the standard Co-Authored-By: Claude trailer on both commits because that's the convention for commits made through this tool, but the code in them is yours, not mine — I only reviewed and verified it. Amend the trailer out if you'd rather the attribution be accurate.

The PR is still a draft, and still stacked on #2403. Worth a look at whether #2403 has merged yet — once it does, this diff drops to just your and my commits, and it's ready to mark for review.

Rebased, pushed, and #2484 is out of draft: https://github.com/entireio/cli/pull/2484

#2403 was merged rather than squashed, so 792ddb018 was already an ancestor of main and the rebase was clean — no conflicts despite both branches touching refs_naming.go and the ParseRef region. The PR now shows exactly four commits, all mine and yours:

• checkpoint: resolve, write, and list case-folded shard refs
• checkpoint: ask the remote for both shard spellings
• checkpoint: migrate through the resolving ref spelling
• strategy: push the queued ref spelling that resolves locally

MERGEABLE, lint clean, and I updated the body — dropped the stacking caveat and added sections for the migrate and push-queue fixes, which landed after the description was written.

On the full test:ci after the rebase: two integration tests failed, TestExternalCommand_SigintReachesPlugin and TestExternalCommand_ParentsSignalOutranksTheChilds, both with plugin never reached ready state. That's the known 3-second readiness-budget flake, not a real failure — load average was 15.9 with a 5-minute peak of 35 from the back-to-back suites, and both pass 2/2 on an idle machine. Neither touches anything this branch changes. Everything else is green.

One open item unchanged from before: Entire finding 01M2JPC33KJE (the seen map, Medium) is still open and now stale, left that way deliberately since nothing about it was fixed. Still your call between pushing back and collapsing the two maps.

Done — all four findings resolved, all three GitHub threads resolved, PR mergeable with six commits. Two new commits:

b16cdfb42 — the map collapse. seen and indexByID held identical key sets by construction, so indexByID now answers both "is this listed" and "where". The invariant disappears rather than needing to be maintained. I added a guard test for the interaction that would break first (a checkpoint collapsed from two local spellings must not return as a remote stub), and I checked it passes on the old code too — it's a guard, not a fix, and I said so in both the commit and the resolution note. The old code really was correct.

e4f13831b — and this one was a genuine bug I'd introduced. The re-review turned up a High finding I'd have missed, and it was right: updateCheckpointRef resolved the write name before calling base(), which is wrong whenever base() can fetch. The backfill paths pass refBaseForBackfill, which pulls a checkpoint that exists only on the remote and materializes its ref under the remote's spelling. Resolving first, writeRefName saw an empty repo and chose canonical; the CAS then targeted a name the fetch never populated — CAS retry budget exhausted, 16 retries, backfill dead. Exactly the fork writeRefName exists to prevent, one layer up.

Two things worth flagging about that fix:

• My first version of the test passed against the broken code, for the same reason the dedup fixture did earlier: a loose folded ref still answers to the canonical name on APFS, so the CAS succeeded locally and hid a bug that is unconditional on Linux. Packing inside the fake fetcher forces the case-sensitive condition on both platforms. This is the third time that trap has caught a test in this branch — worth watching for in review.
• The fix primes base() once and reuses that result for the builder's first attempt rather than re-reading, so it costs no extra fetch. That matters given the round-trip cost I already flagged in the PR body: a genuinely absent checkpoint pays one probe per spelling, and a naive re-read would have doubled it again.

mise run lint clean and full mise run test:ci green (exit 0), this time with no flakes at all.

All four findings now show stale freshness, which is just the line numbers having moved under them — the status is resolved on each.

Replied to cli-90 with both PRs from this session:

• #2484 (created) — OPEN, checks fail, REVIEW_REQUIRED
• #2403 (reviewed) — MERGED, checks pass, APPROVED

One thing worth knowing, since it's the kind of detail that misleads: gh pr view served a stale head for #2484. Its statusCheckRollup and updatedAt were from 17:06 on 09-15, which predates the last two commits I pushed that evening. I checked git ls-remote refs/pull/2484/head instead — the real head is e4f13831b, my final commit — and pulled check runs for that SHA directly. The numbers I reported are for the actual head: 15 pass, 1 fail.

The single failure is Entire Gates, and it isn't a code or CI problem: trail #1333 has no approvals and is in reviewing phase, which matches GitHub's own REVIEW_REQUIRED / BLOCKED. All four trail findings are resolved. So #2484 is waiting on your review and nothing else.

Rebased and assessed. Remote tip is untouched since my last push, so nothing of anyone else's is at risk.

Still needed — yes, clearly

All three core gaps are byte-identical on today's main. refBase still looks up the canonical name only; updateCheckpointRef still resolves the write name before base() runs; and the stale-drop still happens — it just moved from partitionLocalRefs into the new partitionCheckpointRefPushes, where a queued name that no longer resolves is pruned from the queue and the checkpoint is never pushed.

#2403's EqualFold is on main, so the listing half shipped. FoldedRefName, resolveLocalRef and writeRefName are absent, so nobody fixed the rest another way. The git-refs backend is alive and doctor migrate-checkpoints still exists, so the precondition stands too.

The rebase

Five of six commits applied clean. The push path was reworked underneath the strategy commit: it now drains PushQueueEntry tokens and pushes <hash>:<name> through checkpointRefPush rather than <ref>:<ref>. I moved the resolution into partitionCheckpointRefPushes, where the queued name becomes a ref lookup, and deleted normalizeQueuedCheckpointRefs entirely — the new flush resolves per flush and prunes by token, so rewriting the queue bought nothing. That commit is now smaller than it was.

One trap worth recording: <hash>:<name> makes it look like you can push the canonical name while storing folded, keeping the remote namespace clean. That breaks recoverCheckpointRef, which uses candidate.name for the remote fetch and for the local recovery CAS. Local and remote spellings still have to match.

I verified the ported test fails against main's source and passes with the fix. Lint is clean; checkpoint, strategy and the doctor tests all pass. Full test:ci is still running.

What I found while checking

Main grew two functions with the same exposure, and this PR does not cover them. I probed rather than reasoned: for a folded, packed checkpoint ref, CheckpointRefExists and CheckpointWaiting both return false — whichever spelling is queued.

It isn't a regression — main answers false too, via the stale-drop — but it drives a wrong message. reportHeldAttachedCheckpoint in attach.go hits the ULID branch and tells the user "checkpoint X was not found after it was written; run 'entire session attach' again", which can never succeed.

The clean fix is to make the queue hold the canonical spelling as the identity (so CheckpointWaiting, the checkpoint push <id> selection and the user-visible Ref all agree) and resolve to the stored spelling only at the three places that do git I/O. That's about four small edits plus tests — real scope growth on a PR that's already been reviewed.

So: extend this PR to cover it, or land the rebase and open a follow-up? I'd lean follow-up, since the attach message is a separate symptom on separate code. Either way I'll hold the force-push until test:ci comes back green, and check the trail's findings once it lands.

Force-push is blocked by the permission classifier as [Git Destructive], so I've stopped rather than work around it. Everything else is done.

The rebase is complete and verified locally — soph/checkpoint-shard-case-lookup now sits on current main as 6 commits, build and vet clean, mise run lint 0 issues, and the checkpoint, strategy and doctor tests all pass. The remote still holds the old pre-rebase tip, so the PR will keep showing CONFLICTING until this is pushed:

The lease pins the exact tip I verified is still there, so it refuses if anything moved. You can run it here with ! <command>, or grant the permission and I'll do it.

One correction to what I said earlier. I reported test:ci as likely fine; it actually exited 1. The background task showed "exit code 0", but that was the trailing grep in my pipeline, not mise — exactly the false-signal trap, and I nearly passed it on to you. The real result is one failure, TestOpenCodeSeedRepoPlantsDeps in e2e/agents, which my branch does not touch (zero files under e2e/). I checked out clean main in a scratch worktree and it fails there identically, same assertion and path, so it's pre-existing and unrelated — recent OpenCode 2 work on main is the likely source.

Still open from my last message, and not something the background notification answered: the two newer surfaces, CheckpointRefExists and CheckpointWaiting, return false for a folded ref, which makes entire session attach print "checkpoint X was not found after it was written; run 'entire session attach' again" — advice that can never work. Extend this PR to cover it, or land the rebase and open a follow-up? I still lean follow-up.

Repo convention wraps commit bodies at 72. Starting the full CI suite in the background, then committing.