Shallow Replay Handover Carry-On

Claude Code·Opus 5.5·

MuskanPaliwal·19h ago·9hr 52min·6 Checkpoints·27 file changes·+440/-195·129.6K tokens

There's one open finding on cli/1760, and it's a real (low-severity) issue. I'm proposing a fix here and haven't edited anything yet.

Finding 01M6MZMB4VPV (low, confidence 0.40, cmd/entire/cli/strategy/common.go:269-279)

Problem: The fetch-side path still reads .git/shallow its own way, through hasReachableShallowBoundary → repo.Storer.Shallow() (go-git). The replay path reads it through loadShallowHashes, which reads the git common dir. So there are two loaders for the same data, and both feed reachesShallowBoundary.
Root cause: This branch moved both paths onto the shared map[plumbing.Hash]bool but left the old go-git loader in place. Main already has hasReachableShallowBoundary reading through repo.Storer.Shallow(), so this is a missed cleanup, not a new regression. I haven't checked whether the two loaders actually disagree in linked worktrees, which is the example the finding gives.
Proposed fix: Delete hasReachableShallowBoundary, which has one caller (common.go:190). At that call, run loadShallowHashes(ctx, repoPath) and then reachesShallowBoundary(ctx, repoPath, shallow, localHash, targetHash), keeping the same error wrapping and errShallowHidesMergeBase behavior. That's about 10 lines removed and 4 added, with no behavior change in normal clones. The existing shallow tests (cloneWithShallowHiddenMergeBase and the fetch-side SafelyAdvanceLocalRef cases) already cover this seam, so I'd add no new tests.
Verification: The strategy package tests, then mise run fmt && mise run lint, then mise run check before committing.

After approval I'd commit with this message:

Then I'd ask before pushing. Once the fix is on the remote, I'd ask before resolving the finding with this note:

Should I go ahead with the fix?

I've committed the fix as a5e6aeceeb (5 lines added, 13 removed). It's local only and not pushed yet.

hasReachableShallowBoundary is gone. The fetch-side guard now reads the shallow set through loadShallowHashes, the same loader replay uses, so there's one source for .git/shallow. mise run check passed (format, lint and all CI tests).

Should I push this to muskan/ent-3801-refuse-push-side-replay-over-shallow-history? Once it's pushed and the finding shows the new code, I'll ask before resolving 01M6MZMB4VPV with this note:

Then I'll re-check the findings list.

I couldn't resolve the finding. Claude Code's permission check blocked the command as a write to an external system, even after your yes. Nothing was changed on the Trail.

You can run it yourself:

Or add a permission rule for entire trail finding resolve and I'll retry. After that I'll re-check the findings list for any new ones on a5e6aeceeb.

The rest of the handover list:

Step 2: you need to run /update-trail-context 2630. The cli/1760 section is still missing the empty-orphan exception, the pre-push warning, and that the hint names only git fetch --unshallow.
Step 3: linking cli/1760 on ENT-3801 is a company Linear write. Do you want me to add it as a link attachment?

Step 1 is done: cli/1760 has no open findings, current or stale. I resolved 01M6MZMB4VPV with the note we agreed on.

The CLI printed resolved → resolved, which suggests the finding had already flipped to resolved between my list and the resolve call, maybe automatically once it went stale. Either way, the note is recorded and the list is empty.

Still left:

Step 2: you need to run /update-trail-context 2630 to add the empty-orphan exception, the pre-push warning, and that the hint names only git fetch --unshallow.
Step 3: should I add cli/1760 (https://entire.com/gh/entireio/-/trails/2630/changes/cli/1760) to ENT-3801 in the company Linear as a link attachment titled cli/1760: refuse replay over shallow history?

Yes, it needs updating. I read the cli/1760 section of Trail 2630, and it now says something wrong, not just something incomplete:

Wrong: it says replay refuses with "run 'entire doctor' or 'git fetch --unshallow'". Since 2bdcb32afb the message names only git fetch --unshallow, because doctor repairs through the same reconcile and would also refuse.
Missing: empty orphans with no data still reset to the remote; the guard runs only when there is something to replay.
Missing: pre-push prints the unshallow hint when push recovery refuses.
Missing: fetch and replay now read the shallow set through one loader (a5e6aeceeb).
Outdated verification: the new tests (local tip reaching the boundary, the pre-push seam test) and the second flaky test (TestExternalCommand_SigintReachesPlugin, 3/3 alone).

/update-trail-context is an explicit-only skill in ~/hub/skills, so you need to run it:

I can't start it myself. I could write a replacement section and apply it with entire trail update, but that replaces the whole description, and the skill is the safer route.

Step 3 is still open: should I add cli/1760 to ENT-3801 as a link attachment titled cli/1760: refuse replay over shallow history?

Base directory for this skill: /Users/muskanpaliwal/.claude/skills/update-trail-context

Update Trail Context

Update the durable Context document of one existing Entire Trail. Trail Context and the GitHub PR body are separate artifacts: use the PR, issue, branch, diff, checkpoints, and verified Trail state as evidence for the draft, then write the approved text through Entire's dedicated Trail body operation.

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18h ago·2m

I've drafted the new Trail 2630 description, and it passes the helper's format check. Nothing has been written to the Trail yet.

Target

Repository: gh/entireio/cli
Trail: #2630 (01M5Y87PEGNC16ZENYQ7NZ3BP4)
Change: cli/1760 on muskan/ent-3801-refuse-push-side-replay-over-shallow-history
URL: https://entire.com/gh/entireio/-/trails/2630

Current description: 83 lines of plain text, saved at /private/tmp/claude-501/-Users-muskanpaliwal-Work-entireio-cli-ent-3801-refuse-push-side-replay-over-shallow-history/e8c81c82-ab8c-47e1-a299-be757f996006/scratchpad/before.txt

Proposed description: the full text is at /private/tmp/claude-501/-Users-muskanpaliwal-Work-entireio-cli-ent-3801-refuse-push-side-replay-over-shallow-history/e8c81c82-ab8c-47e1-a299-be757f996006/scratchpad/after.md. Only these parts change wording:

In the Changes list:

The cli/1760 section, where the first two blocks are unchanged:

Formatting will change outside cli/1760. The CLI only returns the description as plain text, so I rebuilt its structure: the headings, and list items for the policy modes, commands, Changes, follow-ups, measurements, "Not covered" and "Open questions". Words outside cli/1760 are unchanged. But any inline code, bold or links the page shows today in other sections would become plain text, because I can't see that formatting to keep it.

Not handled: cli/1759 (muskan/ent-3709-tidy-push-policy-edge-cases, merged, no code changes) is on the Trail but isn't mentioned anywhere in the description. I left it out because I don't know what it covered.

Effect: this replaces the description of Trail 2630 only, and leaves code, branches, findings and other metadata alone. Should I write it, or do you want edits first?

I updated the Trail 2630 description and confirmed it reads back as approved: https://entire.com/gh/entireio/-/trails/2630

Checks:

Before the write: I re-read the Trail. The number, id, URL and description all matched the version you reviewed.
After the write: the read-back has 88 blocks, matching the draft, and its 2,322 words match the approved text in the same order. Number, id and URL are unchanged.
Untouched: code, the branch, findings and the change state. No new Trail was created.

Uncertain:

Formatting elsewhere: the read-back is plain text, so I couldn't check how the page looks. Any inline code, bold or links that sections outside cli/1760 had before are now plain text. The previous description is saved at /private/tmp/claude-501/-Users-muskanpaliwal-Work-entireio-cli-ent-3801-refuse-push-side-replay-over-shallow-history/e8c81c82-ab8c-47e1-a299-be757f996006/scratchpad/before.txt if you want to restore any of it.
Small race: another edit landing between my check and the CLI's own read would not have been caught. Nothing suggests one happened.
cli/1759: it's on the Trail but still isn't described.

Steps 1 and 2 are done. For step 3, should I add cli/1760 to ENT-3801 as a link attachment titled cli/1760: refuse replay over shallow history?

All three handover steps are done. cli/1760 is now linked on ENT-3801 as cli/1760: refuse replay over shallow history, pointing to https://entire.com/gh/entireio/-/trails/2630/changes/cli/1760. Linear shows it next to the existing PR #3009 and Slack thread links.

What happened this session:

Findings: I fixed 01M6MZMB4VPV in a5e6aeceeb, pushed it and resolved it. cli/1760 now shows no findings.
Trail context: the Trail 2630 description is updated and its read-back matches what you approved.
Linear: the link is added to ENT-3801.

The ENT-3801 ticket description is now slightly out of date, and I left it alone:

It says the fetch guard suggests entire doctor or git fetch --unshallow. The message now names only git fetch --unshallow.
Its Agent notes mention hasReachableShallowBoundary, which a5e6aeceeb deleted.

Do you want me to patch those two lines in the ticket?

Because the fix isn't on main yet. cli/1760 is still open, so a teammate pulling main today would still hit the bug, and "Done" would claim otherwise.

There's also a practical reason. PR #3009 is linked on the ticket, and Linear's GitHub integration usually moves an issue to Done when its linked PR merges. If that automation is on for the Entire team, the ticket will close at the right moment without anyone touching it. I haven't checked whether it's enabled. If it isn't, close it by hand after the merge.

If your team uses an "In Review" state for work that's pushed and waiting on review, that would describe cli/1760 better than "In Progress". Do you want me to move it there?

ENT-3801 is now In Review in Linear. My second review found one finding I'd discuss before merging and three small ones; nothing blocks the merge.

1. The problem

When a checkpoint ref push is rejected, Entire fetches the remote version and replays your local checkpoint commits on top of it. If git merge-base finds no common ancestor, the code treats the two histories as unrelated and replays your whole local chain.

In a shallow clone, the shared ancestor can simply be missing locally, behind the shallow boundary. Replaying everything then writes old snapshots over newer remote content. Probes against main showed a teammate's newer metadata.json being reverted through both v1 push and entire doctor. This hits clones where a checkpoint ref is itself shallow, for example one fetched with --depth=1 by an older CLI.

2. How the change solves it

The shared replay helper (replayDisconnectedOnto) now refuses when either tip reaches a shallow boundary. That one check covers git-refs push recovery, v1 push and doctor.

A local chain with no data still resets to the remote, because dropping it loses nothing.
Fetch and replay now read the shallow set through one loader.
Pre-push prints a warning naming the ref and git fetch --unshallow. v1 push shows the same text in its "couldn't sync" warning.
Cost: the extra rev-list runs only on the rare path where no merge base is found.

The effect is that a corrupting rewrite becomes a refusal that keeps the ref queued.

What this is based on: the code, ENT-3801, the Slack thread linked on it, and the handover. I didn't run entire why, entire search or librarian for this pass.

3. Findings

Medium: the hint recommends a command the codebase deliberately avoids.
- push_common.go:887 says "Do NOT --unshallow here: ... downloads the whole repository".
- git_operations.go:406-411 and :577-582 heal a shallow metadata ref with a fetch scoped to that one ref (metadataFetchDepth), "without deepening an independently-shallow source-tree clone (unlike --unshallow)".
- The guard only fires when the checkpoint ref's own history reaches the boundary, which is exactly the case that scoped fetch already heals.
- So we tell users to run what our own code refuses to run, and in a shallow CI or monorepo clone that downloads everything.
- The handover consciously deferred this. Given that prior art, I'd reconsider: the hint could name the ref and suggest a scoped deep fetch of it.
Low: a stale comment. push_common.go:887-891 still says the missing pre-shallow history "isn't needed to produce a correct rebase". The disconnected case now proves it can be, so the comment should say that case refuses.
Low: fetch and replay treat empty orphans differently. SafelyAdvanceLocalRef (common.go:190) still refuses an empty orphan in a shallow clone, while replay now resets it. This was already true on main, but the two sides now diverge.
Low: doctor offers a fix that will fail. In a shallow clone, doctor says "Fix: cherry-pick local checkpoints onto remote tip (preserves all data)" and then refuses. The handover already lists this as a follow-up.

Checked and fine:

Warning order in pre-push: a non-fast-forward rejection leaves the rejection-reason text empty, so the shallow warning does fire.
The recovery error unwraps both errors, so errors.Is reaches the sentinel.
The new tests call t.Parallel() except the one that has to use t.Chdir.

One review lesson is worth considering for General.md: "Before writing a remedy into a user-facing hint, search the codebase for that command; if code avoids it on purpose, the hint should not recommend it."

Do you want me to brief a fix for finding 1 (with 2 alongside), or leave both as follow-ups? I haven't edited anything.

No good reason. I skipped the evidence lookups that reviews.md asks for, which was a shortcut, and I've now run them.

What I ran:

entire why on the two lines behind finding 1: git_operations.go:411 and push_common.go:887.
entire search for past decisions about --unshallow.
entire checkpoint explain on the checkpoint behind the scoped deep fetch (4277ced83b37).
git show on the two commits the search found.
entire brain recall: empty, because this branch hasn't synced with the hosted Brain yet.
librarian: blocked by a Cloudflare Access redirect, so WARP needs you to re-authenticate.
entire graph impact: I didn't run it.

The lookups make finding 1 stronger. There's a recorded history of moving away from --unshallow:

May 22, 6f104c7e: push sync gets "Do NOT --unshallow here", because it downloads the whole repository on a shallow monorepo.
May 27, 0f6f631b77: "Auto-unshallow any shallow checkpoint repo". The Unshallow option survives, but its doc now warns it could "silently convert a deliberately-shallow user clone into a full one" (checkpoint/remote/git.go:170-174).
June 17-18, ebe73db181 plus Soph's session e1c2cd64 (checkpoint 4277ced83b37): the root cause turned out to be the CLI's own --depth=1 tip fetch on resume, explain and attach. The fix stopped shallow-fetching and added a deep fetch scoped to the one ref (metadataFetchDepth), "without deepening an independently-shallow source-tree clone (unlike --unshallow)".

So the team has already rejected repo-wide --unshallow twice and settled on deepening just the affected ref. Our hint tells users to run exactly the rejected command. The case the guard catches, a checkpoint ref left shallow by an older CLI, is the one that scoped fetch was built to heal.

That moves finding 1 from "a hint that costs more than it should" to "contradicts a recorded design decision". It's still not a correctness bug: the guard refuses, and nothing gets corrupted.

My recommendation is to change the hint to a scoped deep fetch of the refused ref, using the same depth the code uses. That keeps cli/1760 consistent with the established approach. Do you want a brief for that fix, or should I first rerun librarian once WARP is back, to look for Slack discussion on this?

Here's the brief. I haven't edited anything.

Problem

When the shallow guard refuses, it tells users to run git fetch --unshallow. That command deepens the whole clone, so on a shallow CI or monorepo clone it downloads the entire repository. The team already rejected it twice for that reason:

push_common.go:887 says not to use it.
checkpoint/remote/git.go:170-174 warns it can silently turn a deliberately shallow clone into a full one.
ebe73db181 settled on a deep fetch scoped to the one ref instead: metadataFetchDepth, used in git_operations.go:582.

Root cause

The error's text is fixed, so it can't name the ref or remote. The only remedy that works without that information is the repo-wide one.

Proposed change

Neutral sentinel text. errShallowHidesMergeBase keeps its identity but its message becomes "...prevents proving refs are disconnected; fetch that ref's full history from the remote and try again". Fetch-side callers that don't know the remote keep this neutral wording.
A concrete command where the caller knows both remote and ref. A small helper builds:

It writes no local refs (only FETCH_HEAD), deepens only that ref's history, and leaves a shallow source tree alone. It's used in three places:
- the pre-push git-refs warning (manual_commit_push.go:805)
- the v1 push "couldn't sync" warning (push_common.go:609)
- doctor's failed fix (doctor.go:588)
URL remotes go through the existing redaction (displayPushTarget / RedactURL).
Share the depth constant. Move metadataFetchDepth from cli to an exported constant in checkpoint/remote, next to its Depth option, and reference it from both packages. That way the hint can't drift from the value the code actually uses.
Fix finding 2. Update the stale comment at push_common.go:887-891 to say the disconnected case refuses over shallow history.

Tests first

These are the failure modes, and each test is written before the code:

The hint doesn't work. Using the existing cloneWithShallowHiddenMergeBase fixture, run the exact command the warning prints, then retry. Recovery must succeed. I'd also run the case where only the local tip reaches the boundary. This is the key test, and it follows the cli lesson about running any command we suggest.
The hint names the wrong ref or remote, or still says --unshallow. Update TestPrePushCheckpointRefs_ShallowRefusalTellsTheUserHowToUnblock.
v1 push or doctor still prints the old remedy. I'd add a test only if an existing harness covers that output; otherwise I'll report it as unverified rather than build a new harness.

Tradeoffs and risks

Unproven assumption: that a scoped deep fetch removes a boundary sitting on the local tip's history. It should, when that history is shared with the remote, because git sends "unshallow" for commits it completes. The first test proves or disproves this before any code is written. If it fails, I'll stop and come back to you.
Same limit as before: if the boundary is only in local history the remote never had, neither command helps. That isn't new.
Scope: roughly 40 production lines across common.go, manual_commit_push.go, push_common.go, doctor.go, git_operations.go and checkpoint/remote, plus tests. Moving the constant touches one file outside strategy.
Not included: findings 3 (fetch and replay treating empty orphans differently) and 4 (doctor offering a fix that will fail).

After implementation

I'd run mise run check, then commit:

I'd ask before pushing, and before rewriting the cli/1760 part of the Trail description, which currently names git fetch --unshallow.

Should I go ahead?

I've committed the fix as 276551597b. It's local only: the branch is one commit ahead of origin.

When the shallow guard refuses, git-refs pre-push, v1 push and doctor now name a fetch scoped to the one ref, such as git fetch --depth=1000000000 origin refs/entire/checkpoints/..., instead of git fetch --unshallow. The depth is now one shared constant, remote.FullRefDepth, so the hint always matches what the read path uses. I also updated the stale comment at push_common.go:887.

Verified:

The command works. Two tests run the exact command the warning prints: one through PrePushFromGitHook, one through the v1 path, fetchAndRebaseRefCommon. In both, the next push or sync then recovers with the teammate's commits kept.
The tests can fail. When I changed the hint to --depth=1, both failed.
Lint: 0 issues after formatting. The canary passes.
Unit and integration: four tests failed in the full runs. Three passed 3 out of 3 when run alone: TestAttach_DiscoversExternalAgents, TestExternalCommand_SigintReachesPlugin and TestExternalCommand_ParentsSignalOutranksTheChilds. TestFetch_AbortStalledLetsProgressingFetchRun also fails on the clean previous commit, with the machine's load average around 22 to 30, so it's load, not this change.

Not verified:

Doctor's message has no test. The fixture lives in the strategy test package, so a doctor test would need a new harness. The wrap is one line using the same helper.
URL remotes print the redacted URL. If credentials are embedded in the URL itself, the printed command may need them added back.
One small leftover: checkpoint/remote/git_test.go:371 still writes 1_000_000_000 literally instead of using the new constant.

Should I push 276551597b? After that, the Trail 2630 description's cli/1760 section needs a rerun of /update-trail-context 2630, because it still names git fetch --unshallow. I'll also re-check findings once the push lands.

The draft is ready and passes the format check; nothing is written yet. It changes only the cli/1760 section of Trail 2630 (#2630, 01M5Y87PEGNC16ZENYQ7NZ3BP4, https://entire.com/gh/entireio/-/trails/2630). The rest of the description is word-for-word the same, and the live text matched what you approved last time.

Replace the paragraph "The error names one remedy: run git fetch --unshallow and try again. ..." with:

Replace the Verification paragraph with:

Remove this item from "Left as is", because the fix addresses it:

The other "Left as is" item, about doctor labelling the branches DISCONNECTED, stays. The full replacement is at /private/tmp/claude-501/-Users-muskanpaliwal-Work-entireio-cli-ent-3801-refuse-push-side-replay-over-shallow-history/e8c81c82-ab8c-47e1-a299-be757f996006/scratchpad/proposed.md.

Should I write it?

Because the Trail description now says something the code no longer does.

Commit 276551597b changed the hint, but the cli/1760 section on Trail 2630 still says three things that aren't true anymore:

The remedy: it says "The error names one remedy: run git fetch --unshallow and try again." The code now names a fetch scoped to the one ref, and avoids --unshallow on purpose.
"Left as is": it lists "a plain git fetch --unshallow can download a whole monorepo" as unfixed, but that's exactly what this commit fixed.
Verification: it doesn't mention the new tests that run the printed command and prove it unblocks the push.

The Trail description is the review argument reviewers read instead of a PR description. Anyone reviewing cli/1760 from it today would think we still tell users to run --unshallow, and might flag the very problem we just fixed.

Do you want me to write it, or edit the wording first?

Both findings are real, but I'd only partly follow the first one's suggestion. I haven't edited anything yet.

01M6NQ8FJR3Y (godoc): real, trivial. I put FullRefDepth between // FetchOptions configures a git fetch operation. and type FetchOptions struct, so that line now reads as the constant's doc and FetchOptions has none.

Fix: move the constant block above the FetchOptions comment in checkpoint/remote/git.go.

01M6NQ926CND (fetch side loses its command): real, but the suggested fix would mislead. Four callers can get the bare error from SafelyAdvanceLocalRef:

git_operations.go:600, the one the finding names. The fetch just before it already uses Depth: remote.FullRefDepth on that exact ref (line 583). If the guard still fires after that, running our command would repeat the fetch that just ran and change nothing. So wrapping it there would print a command we know won't help. I'd leave the neutral text there. The old --unshallow text also pointed at a fetch that, in this case, almost certainly wouldn't help.
checkpoint_remote.go:216, which fetches from a checkpoint_remote URL. Its fetch is not deep (fetchURLIntoTmpRef sets no depth), so the scoped fetch could heal it. The finding missed this one, and it's where the command actually helps. Fix: wrap it with WithShallowFetchHint(err, remoteURL, refs.Primary), which prints the redacted URL.
resume.go:892 and common.go:1046 only log the error at Debug level, so no user sees it. No change.

Tests: I'd add one that runs FetchMetadataFromCheckpointRemote against a shallow-hidden merge base, asserts the error carries the command, runs that command, and checks the next fetch succeeds. If that function can't be driven in-process without the real foreground-fetch machinery, I'll stop and tell you rather than build a harness.

Commit:

I'd ask before pushing. After the push, I'd ask before resolving with these notes:

01M6NQ8FJR3Y:
01M6NQ926CND:

Should I go ahead?

Main is merged and the full check is running on the merged tree.

Fixes committed: 6615f69c94, for the two open findings.
Main merged: 106 commits, no conflicts. The branch is now 108 commits ahead of origin, and nothing is pushed.
Previous check: lint showed 0 issues. The one failure was the cli package going over Go's 10-minute test timeout on this loaded machine, not a hang and not a package this commit touches.

The machine's load average is around 66 to 86 right now. If the cli package times out again, I'll rerun just that package with a longer timeout rather than the whole suite.

I stopped the check. None of the processes still running are from this worktree. The remaining mise run lint, go test -race and canary runs belong to other sessions, including the bump-go-git-for-loose-objects-packs worktree, and they're probably why the load is so high. I didn't touch them.

Branch state:

HEAD is the merge of origin/main on top of 6615f69c94, the fix for the two findings.
Not pushed: the branch is 108 commits ahead of origin.
Checks on the merged tree: none yet.

The last complete evidence is from before the merge: lint showed 0 issues and the new tests pass. The only failure was the cli package going over its 10-minute timeout under load.

Do you want to wait for the machine to free up and run the check, or run a narrower check now? For example, lint plus the strategy and checkpoint/remote packages, which is where this branch's changes are. I won't push until you say so.

The merged tree is clean: lint shows 0 issues, everything builds (integration tests included), and the strategy and checkpoint/remote tests pass. The full mise run check hasn't run on the merged tree, since you stopped it. Main's 106 commits come with their own CI, and this branch's changes are all in the packages I tested.

Ready to push:

6615f69c94: the fix for both open findings (checkpoint_remote fetch hint and FullRefDepth godoc), with a test that runs the printed command and checks the next fetch succeeds.
The merge of origin/main: 106 commits, no conflicts, default merge message.

Should I push the branch (108 commits ahead of origin)? Once the push lands, I'll ask before resolving the two findings with the notes I showed you earlier, then re-check the findings list.

The one failing check is complexity-gate; nothing else has failed. The rest pass, apart from test-core, test-integration (c) and Entire Gates, which are still running.

Why: retryCheckpointRefsIndividually (manual_commit_push.go) went from cognitive complexity 39 on main to 40 here, and the gate fails any function over 30 that is new or got worse:

The extra point is the else if errors.Is(pushErr, errShallowHidesMergeBase) branch that prints the shallow warning. It came in with 2bdcb32afb, in the earlier session, not today's commits. CI shows it now because this is the first complexity run since then. I didn't run mise run complexity:gate locally, and mise run check doesn't include it.

Proposed fix: move the choice of warning into a small helper, roughly:

It would return the rejection warning, the shallow warning with its fetch command, or nothing. The loop then just does if rejectionWarning == "" { rejectionWarning = queuedRefWarning(...) }.

Behavior and messages stay identical.
The function should drop below its base of 39, so the gate passes.
The existing tests already cover both warnings, the rejection one and the shallow one in TestPrePushCheckpointRefs_ShallowRefusalTellsTheUserHowToUnblock, so I'd add no new tests.

Verification: mise run complexity:gate locally, the strategy tests, then fmt and lint. Then I'd commit with this message and ask before pushing:

Also still open: resolving 01M6NQ926CND with the note above. Do you want me to resolve it now, or after this fix lands? And should I go ahead with the complexity fix?

I've made the complexity fix but haven't committed it yet.

Complexity gate: mise run complexity:gate now passes locally: "no new or worsened function over cognitive complexity 30". The warning choice moved into queuedRefWarning, and the messages are unchanged.
Tests: the pre-push, rejection, retry, shallow and flush tests in strategy pass.
Lint: still waiting. Another session's golangci-lint has been running for over 10 minutes, so it's moved to the background and starts as soon as that run exits.

I'll commit once lint is clean, then ask you before pushing.

I've committed the complexity fix as b3d37887aa; the branch is one commit ahead of origin and not pushed.

Complexity gate: passes locally.
Lint: 0 issues.
Tests: the related strategy tests (pre-push, rejection, retry, shallow, flush) pass.

The delay came from my lint wait loop: it was matching other sessions' wait loops instead of a real golangci-lint run, so it would never have finished. Running lint directly took about a minute.

Should I push b3d37887aa? After that I'll re-check CI and the findings list.

This one is real, and it's a stronger version of what I fixed earlier. I checked the claim, and it holds: when Entire runs a fetch, remote.Fetch (via newCommand, checkpoint/remote/git.go:656-670, :828) injects ENTIRE_CHECKPOINT_TOKEN as an http.extraHeader and rewrites SSH remotes to HTTPS. A git fetch the user copies from our message gets none of that, so it fails for token-authenticated checkpoint remotes. That's mostly CI, which is also where shallow clones are common. The redacted URL also loses any credentials embedded in it. So the command we print is unreliable precisely where users are likely to hit it. I haven't edited anything.

Options

A. Entire does the deep fetch itself and retries once. This is what I recommend, and it's what the finding suggests. In each place that hits the shallow refusal, repeat the fetch Entire already just made, with Depth: remote.FullRefDepth, then retry the replay once. This is the same heal the read path already does on every resume (git_operations.go:576). It reuses target resolution, the token header and SSH handling, and runs only in the shallow-and-no-merge-base case. The four places:

git-refs pre-push recovery (recoverCheckpointRef, push_common.go:~290): deep-fetch into the same temp ref, reopen the repo, and retry replayOntoRemote. The finding didn't name this one, but it's the main pre-push path.
v1 push (fetchAndRebaseRefCommon): deep-fetch, then retry reconcile and replay.
checkpoint_remote fetch (fetchMetadataBranchWithin): pass a depth through fetchURLIntoTmpRef, then retry PromoteTmpRefSafely.
doctor (checkDisconnectedMetadata): on a shallow refusal, run the existing deep metadata fetch for the elected remote, then reconcile again.

If the retry still refuses, meaning the cut-off is only in local history, the message names the ref and the remote, prints no command and no URL, and keeps the neutral "fetch the ref's full history" wording. If the deep fetch itself fails, the user sees that fetch error. shallowFetchCommand goes away.

B. Minimal: stop printing a command. Keep the manual step, but say "fetch the full history of <ref> from <remote>", or "from the checkpoint remote" for a URL. This fixes the leaked-credentials and broken-auth problems, but users still have to work out the command themselves, and a remote name has the same token problem.

Tradeoffs of A

Cost: one extra fetch of a single ref's history, only in the rare shallow case and within the existing push budget. Normal pushes don't change.
Scope: roughly 80 to 120 production lines across four call sites, bigger than anything so far. I'd keep the new retry paths small so the complexity gate stays green, and I'll run it locally before pushing.
Risk: a retry loop. It's capped at one retry, and a test covers the case where it still refuses.

Tests first

Auto-heal works: the two tests that ran the printed command become tests that the first push or sync succeeds on its own, with the teammate's commits kept and no warning. I'd add the same for FetchMetadataBranch.
Still refuses when it should: if only the local side reaches the boundary, the refusal comes after exactly one retry, and the message has no URL and no git fetch command.
Doctor: a test only if the existing doctor harness can set this up; otherwise I'll report it as unverified.

After implementation

I'd run mise run complexity:gate, then mise run check, then commit:

I'd ask before pushing, before resolving the finding, and before another Trail description update (its cli/1760 section describes the printed command).

Do you want A or B?

It suggests option A: stop printing a command, and have Entire do the deep fetch itself.

Problem: the git fetch command we print can't be relied on. The redacted URL loses any embedded credentials, and token auth (ENTIRE_CHECKPOINT_TOKEN) only applies when Entire runs the fetch, not when the user copies the command. Running it by hand also skips the SSH handling Entire applies.
Fix: each place that shows the hint already makes a fetch it can repeat. When the shallow refusal happens, repeat that fetch with Depth: remote.FullRefDepth and retry once. It names three places: v1 push (fetchAndRebaseRefCommon), the checkpoint_remote fetch (fetchMetadataBranchWithin), and doctor, which should deep-fetch before reconciling.
Why this is safe: it's the same heal the read path already does, it reuses the existing auth and SSH setup, it runs under the existing push budget, and it only fires in the shallow-and-no-merge-base case.
If the retry still refuses: name the remedy without a URL, "fetch the full history of <ref> from <remote>", or "from the checkpoint remote" when the target is a URL. Then remove shallowFetchCommand, or keep a printed command only when the target is a remote name.
Tests: the tests that run the printed command become tests that the second push succeeds on its own, with the teammate's commits kept.

My option A follows it, with two differences:

I'd add the git-refs pre-push recovery path (recoverCheckpointRef), which the finding doesn't mention even though it's the main pre-push path.
I'd drop the printed command completely, even for remote names. Token auth also rewrites remote-name fetches, so a hand-run command can fail there too, and after the automatic retry it would only repeat a fetch that just ran.

On tests, the finding says "the second push succeeds". With the automatic retry, the first push should succeed, so I'd test that.

Option A is written and passes its local checks. The full mise run check is running now and should take about 10 to 15 minutes.

When a shallow boundary hides the merge base, Entire now fetches that one ref's full history itself, using the same auth and SSH handling as its other fetches, and retries once. That covers all four places:

git-refs pre-push recovery (recoverCheckpointRef)
v1 push (fetchAndRebaseRefCommon, now split into syncFetchedRef)
the checkpoint_remote fetch (fetchMetadataBranchWithin)
doctor's repair

If the boundary is only in local history, the retry still refuses, and the message has no command and no URL. The pre-push warning names the remote as "(from origin)", or "(from checkpoint remote)" for a URL. shallowFetchCommand and WithShallowFetchHint are gone.

Tests:

Heals on its own: four tests, one for pre-push, v1 push, FetchMetadataBranch and doctor, check that the first attempt succeeds without any user action. All four fail when I disable the deep fetch.
Still refuses: a v1 push test checks that a local-only boundary is refused and the message has no git fetch command and no path.
Gates: the complexity gate passes, and lint shows 0 issues after fixing three small problems it found in the new code.

After the check passes, I'll commit with this message and ask you before pushing:

I've committed the auto-heal change as d84b2f3752; the branch is one commit ahead of origin and not pushed.

Full mise run check: lint shows 0 issues, and every package passes except TestProbeConfigDir_AsksClaude. That test came in with the main merge (d311cd94a9), doesn't touch this change, and passed 3 out of 3 alone. It timed out once during the full run.
Complexity gate: passes.
New tests: the four heal tests (pre-push, v1 push, FetchMetadataBranch, doctor) and the still-refuses test pass, and the heal tests fail when the deep fetch is disabled.

Should I push d84b2f3752? After that, I'll re-check CI and findings. Then I'll ask before resolving 01M6NZRD0RW9 with this note:

The Trail 2630 description also needs one more update, because its cli/1760 section still describes a printed command.

The fix for 01M6P1J5SFJP is committed as 467b0834d5; the branch is one commit ahead of origin and not pushed. It changes only tests.

New test: REDACTED. The clone builds on a depth-1 copy of a teammate's side commit, so the deep fetch can't help. The test checks that pre-push still succeeds and prints "checkpoint ref … remains queued: reachable shallow history … (from origin)", with no git fetch and no path in the warning. It also checks that the local ref, the remote and the queue are all unchanged.
Proof it catches a regression: removing the warning from queuedRefWarning makes the test fail.
Doc comment: the outdated comment on the heal test now describes the heal.
Checks: lint shows 0 issues, and the full strategy package passes.

Should I push 467b0834d5, then resolve both findings with these notes?

01M6P1J5SFJP:

01M6NZRD0RW9:

The CI run on d84b2f3752 is still going, and the Trail description update is still pending.