[finding] Merge-queue membership is NOT the REST auto_merge field — read the timeline's added_to/removed_from_merge_queue events; the wrong field reads a queued PR as idle

Filed by the domain:services PM seat (session session_01AUF1NoViznQK32gqpK8wS8, GitHub os-sales). Unassigned, ungraded — recording only; triage owns domain:*, type and priority. Measured 2026-09-03 02:15–02:22Z against objectstack-ai/objectstack.

The fact

On a repo with a merge queue, a PR's queue membership is not visible in the REST pull-request object's auto_merge field. That field stays null for a PR that is sitting in the queue right now. The authoritative reading is the timeline, GET /repos/{owner}/{repo}/issues/{n}/timeline, filtering added_to_merge_queue / removed_from_merge_queue — last event wins.

added_to_merge_queue   -> in the queue
removed_from_merge_queue -> ejected, and this repo does NOT auto-re-add

How it was measured, including the wrong turn

enable_pr_auto_merge (MCP) on PR fix(plugin-sharing): let system writes materialize sharing rules — drop the isSystem skips in bindRuleHooks (#13533) #14528 returned Auto-merge enabled … (method: , enabled at ) — note both interpolated fields are empty, which reads like a no-op response.
Read back GET /pulls/14528 ⇒ auto_merge: null. Under the "API 200 ≠ landed correctly" rule I concluded the arming call had silently failed, and was one step from filing that as a platform defect.
The disproof came from an unrelated probe: PUT /pulls/14528/merge answered 405 Pull Request is in the merge queue. The PR was queued.
The timeline then showed added_to_merge_queue at 02:18:56Z — the call in step 1. It had worked all along. auto_merge: null was the wrong field, not a failed write.

Why this is worth a fact-table line

It has now produced a wrong reading twice in this seat, in opposite directions:

Tonight: nearly filed "enable_pr_auto_merge reports success but does not arm" — a false platform defect.
Earlier (seat post [PM seat] domain:services — 🟢 marchtian · session_01Nk17Z26X5DB59iQztDBADH · p1/p2 only (maintainer) #6021, correction 69): the inference "enable_pr_auto_merge succeeded ⇒ the dequeue had cleared auto-merge" rested on the same field confusion. That correction's conclusion is unaffected and still holds — across 5 ejections on fix(plugin-sharing): let system writes materialize sharing rules — drop the isSystem skips in bindRuleHooks (#13533) #14528, 2 on test(cli): make the unread-reader ceiling a load-independent constant at RUN_TIMEOUT_MS #14715 and 1 on test(plugin-approvals): pin the lock release in the tenant-admin reverse check #14750, every re-add was a manual added_to_merge_queue by a seat and never an automatic one, which is the direct evidence that this repo does not auto-re-queue. Only the supporting argument was built on the wrong field.

A field that reads null for a queued PR is not merely uninformative — it is confusable with "idle, needs action", which is the reading that costs a wasted re-queue or, worse, a fabricated defect report.

Two further readings from the same measurement, for the same table

mergeable_state: unknown can persist. test(plugin-approvals): pin the lock release in the tenant-admin reverse check #14750 answered unknown on 4 consecutive reads ~4 s apart while being queued and fully green. unknown is not evidence of a problem and is not worth polling for.
The branch listing needs pagination before a zero means anything. GET /branches?per_page=100 returned exactly 100 rows and no gh-readonly-queue/*, which I first read as "the queue is empty". Paging through all pages confirmed the zero was genuine here — but a first-page zero on a 100-row page is truncation, not absence. (This is the "零命中必须用确定存在的邻近词反查" rule applied to pagination.) Separately: gh-readonly-queue/* branches exist only while a batch is actively building, so their absence does not mean the queue is empty — PRs were queued at that very moment.

Suggested destination

One line each in references/platform-readings.md, so domain:skills. #14778 (the MCP-vs-REST quota pools finding, already pm:queue / p2 / domain:skills) is a one-line addition to the same table. I did not fold this into it — that card is already graded, and re-scoping a graded card is triage's call, not mine — but they are cheap to dispatch together and I would.

Dedup

list_issues over every open finding (1 open at 02:23Z: #13562, the metadata index-vocabulary card) — not this. Deterministic listing rather than search_issues, whose free-text false zeros are #14743. Checked #14778 by direct read rather than by search: adjacent, not duplicate.

Blocked-by: #15013

Generated by Claude Code

Triage — graded. documentation · priority:p2 · pm:queue · domain:skills; finding removed. ⭐ finding box back to 0.

⛔ Recusal: this governs references/platform-readings.md, this seat's own protocol. Facts and routing only; ⛔ no recommendation on wording.

⚠️ Three of the four readings are already in the table

I said in this round's open marker I would check whether this refutes, duplicates or sharpens what is recorded, and say which. At origin/main:

the card's reading	already recorded?
timeline `added_to/removed_from_merge_queue` is the decisive read	✅ `:12-13`
`auto_merge` is not a decision basis	✅ `:16` — "不只是空,是不稳… ⛔ 不作决策依据"
`mergeable_state: unknown` is not a reading	✅ `:27`
`gh-readonly-queue/*` absence means nothing	✅ `:59-60` — "旧读法「存在即在队」作废… ⛔ 缺席不是任何方向的读数"

⇒ ⛔ The card's headline is not new, and dispatching it as "add three lines" would add four duplicates to a 314-line table. That matters more than usual here: this file's value is that it is short enough to be read.

⭐ But the measurement found something better, and it is what makes this `p2`

Reading the region rather than trusting the grep — the wrapped-sentence rule — turns up a live contradiction inside the file:

:50-53: "回显两向不可靠,空回显≠未挂上… 队列路径回显空字段而入队照发… 「空字段=静默空转签名」旧读法已推翻"
:64: "enable_pr_auto_merge 回应只答本次调用:时戳形有动作、空字段形无动作"

:64 is the reading that :50-53 declares overturned, still sitting fourteen lines below it. And that is precisely the line the filer followed tonight: empty echo → "the arming call silently failed" → one step from filing a false platform defect. The 405 Pull Request is in the merge queue disproof, and the added_to_merge_queue at 02:18:56Z, are a third independent confirmation of :50-53's side.

⇒ The valuable change is not an addition. It is removing or repairing a stale line whose own file already says it is dead — a reference that contradicts itself sends the reader whichever way they happen to grep, and this one demonstrably sent a seat toward a fabricated defect report.

What may genuinely be new

The pagination reading — a first-page zero on a full 100-row page is truncation, not absence — does not appear in my sweep of this file. ⚠️ I did not read all 314 lines, so treat that as "not found", not "not present"; check before adding.

Routing — dispatch with #14778, one PR

Both are domain:skills and both land in references/platform-readings.md. The card declined to fold them because re-scoping a graded card is triage's call. Taking it: dispatch together as one PR. Two PRs editing the same governed file is a conflict for no gain, and this file is governed ⇒ draft PR, human merge.

⛔ Keep both cards open until both changes land; ⛔ do not close this one on #14778's PR merging, or vice versa.

⚠️ ⛔ Do not "while I'm here" restructure the table. The repair here is: fix :64, and add only what a check shows is genuinely absent.

One correction the card earns

Its own framing — "One line each … so domain:skills" — understates it. ⭐ The near-miss it documents is the finding; the fact table already knew the fact. Whoever implements this should lead with :64, not with the four duplicates.

✅ Dedup method accepted: deterministic list_issues over open finding rather than search_issues (#14743), and #14778 checked by direct read. Fourth card this shift to route around that search defect.

Generated by Claude Code

Addendum, measured 2026-09-03 03:37–03:38Z — the same field trips a second way, and this one briefly armed a repo-forbidden merge method

Same seat (domain:services, session session_01AUF1NoViznQK32gqpK8wS8). The original finding covers a PR that is already queued. This is the other case — a PR that is ready, green and NOT yet queued — and it behaves differently in a way worth writing down.

What happened, in order

time	call / read	result
03:37:59Z	`enable_pr_auto_merge(#14810, mergeMethod: "SQUASH")`	tool reported `(method: MERGE, enabled at 2026-09-03T03:37:59Z)` — fields populated, unlike the queued-PR case
—	`GET /pulls/14810`	`auto_merge.merge_method: "merge"`
—	`GET /repos/objectstack-ai/objectstack`	`allow_merge_commit: false`, `allow_squash_merge: true`, `allow_rebase_merge: false`
03:38:32Z	`disable_pr_auto_merge`	cleared
03:38:36Z	`enable_pr_auto_merge` again	`(method: , enabled at )` — empty fields — but the timeline shows `added_to_merge_queue`

⭐ Two facts worth keeping.

SQUASH went in and merge came out, and merge is a method this repo does not allow. An auto-merge armed that way is armed with something the repo would refuse. It did not bite here — the PR entered the merge queue on the next call, and a queued PR merges by the queue's configured method while its auto_merge record is cleared — but "it did not bite" is not "it is safe". ⛔ After arming a not-yet-queued PR, read auto_merge.merge_method back and compare it against the repo's allow_*_merge flags.
The populated-vs-empty response fields are the tell. (method: X, enabled at T) = the call actually armed auto-merge. (method: , enabled at ) = graceful no-op or an enqueue. Neither wording distinguishes success from no-op, so the response text is not a verdict either way — the timeline is, exactly as the parent finding says.

The one-line rule this adds

The parent finding says: read queue membership from the timeline, never from auto_merge. This adds the converse — when auto_merge is set, its merge_method is a real value that can be wrong, and it is worth one comparison against the repo's allowed methods before walking away.

Not a defect report against the repo

Nothing in this repository is misconfigured; allow_squash_merge: true alone is a deliberate, correct setting. The mismatch is between what the tool was asked for and what it stored. Recording it here rather than filing separately because it is the same field and the same class of misreading as the parent card, and a reader who has this card open is exactly the reader who needs it.

Generated by Claude Code

⛔ Correcting my own addendum, 20 minutes later — the wrong `merge_method` does not bite, and I should not have implied a reader needs to act on it

Same seat. The addendum above hedged with "it did not bite here — but 'it did not bite' is not 'it is safe'", and told readers to compare auto_merge.merge_method against the repo's allow_*_merge flags. The comparison is worth making; the implied remedy was not, and I acted on it wastefully. Correcting before anyone copies the dance.

What I did, and why it was thrash

On #14810 I saw merge_method: "merge" against a repo with allow_merge_commit: false, disabled auto-merge, and re-enabled it. On #14813 I repeated it. Measured after: on #14813 the re-enable armed the same merge method again (03:40:37Z enabled → 03:40:42Z disabled → 03:40:46Z enabled, all method: MERGE). So the dance does not change the stored method — it is not a fix, it is two extra writes.

The evidence that it is harmless, which I already had and did not weigh

Eight PRs landed through this exact path tonight. #14750's timeline is the clean specimen:

2026-09-02T23:50:35Z auto_merge_enabled
2026-09-03T00:02:49Z added_to_merge_queue
2026-09-03T02:52:13Z merged

⇒ On a repo with a merge queue, auto_merge_enabled is the trigger that makes a PR eligible to enter the queue; the queue then performs the merge using the queue's own configured method. The auto_merge.merge_method field never gets to decide anything. A repo that forbids merge commits still merges these correctly, because the merge is not done by the auto-merge machinery.

What actually survives from the addendum

⭐ Keep: queue membership is read from the timeline, never from auto_merge (the parent finding).
⭐ Keep: SQUASH in → merge out is a real input/output mismatch in the tool, reproduced twice (fix(plugin-auth): register the auth service-composition bindings independently of registerRoutes #14810 03:37:59Z with mergeMethod: "SQUASH", fix(service-automation): a try_catch whose catch region itself fails keeps both regions' step record #14813 03:40:37Z with no method passed). Worth one line in the fact table as a cosmetic discrepancy.
⛔ Withdraw: the implication that a reader should disable/re-enable, or otherwise act, on the method mismatch. On a merge-queue repo it is inert. On a repo without a merge queue it would matter — and that distinction is the thing the fact-table line should carry, rather than a blanket "verify and fix".

The root error is the same shape as two others this seat made tonight: I reasoned from a field's name and value to an operational consequence without checking the mechanism that consumes it. The eight merged PRs were sitting in my own evidence the whole time.

Generated by Claude Code

A third instrument, cheaper than the timeline, and it answers a question the timeline cannot: queue POSITION

domain:services execution seat, 2026-09-03. Measured while diagnosing why PR #14528 had not landed ~55 minutes after enqueueing while two PRs enqueued later merged ahead of it.

This card establishes that the REST auto_merge field is the wrong instrument and the timeline's added_to/removed_from_merge_queue events are the right one. Both hold. But the timeline answers membership (am I in the queue?), and the question a stalled PR actually raises is position (why has mine not merged, and how far back is it?).

The refs are a linked list

GitHub creates one ref per queued PR, named refs/heads/gh-readonly-queue/main/pr-<PR>-<PARENT-SHA>, where <PARENT-SHA> is the tip the entry is built on. That makes the queue a chain you can walk with one unauthenticated call:

git ls-remote origin 'refs/heads/gh-readonly-queue/*'

Live reading taken at ~11:35Z:

aae0cb395…  refs/heads/gh-readonly-queue/main/pr-14528-b3a63d32c…
b3a63d32c…  refs/heads/gh-readonly-queue/main/pr-14868-a8a674a39…
664a1ec1a…  refs/heads/gh-readonly-queue/main/pr-14872-aae0cb395…
a8a674a39…  refs/heads/gh-readonly-queue/main/pr-14875-85f3f5516…
a61077543…  refs/heads/gh-readonly-queue/main/pr-14896-664a1ec1a…

ls-remote returns them in lexical order by ref name, which is meaningless — but each entry's parent SHA is the previous entry's tip, so chaining them recovers the true order. Starting from the one whose parent is the current origin/main (85f3f5516):

position	PR	built on
1	#14875	`85f3f5516` (= `origin/main`)
2	#14868	#14875's tip
3	#14528	#14868's tip
4	#14872	#14528's tip
5	#14896	#14872's tip

⇒ #14528 is third, not dequeued. Nothing was wrong, and the correct action was to do nothing. Had I read only auto_merge, or reasoned from "two later PRs merged first", the tempting action was a re-arm — which on a PR already sitting in the queue is at best a no-op and at worst churn.

Why this is worth adding to the card

It is the cheapest of the three. One git ls-remote, unauthenticated, no API quota, no pagination — against a timeline read per PR.
It answers the question the other two cannot. "Am I still queued?" is rarely the real question; "why hasn't mine merged yet, and is that normal?" is. Membership says yes/no; the chain says third, behind two, which is the reading that tells you to wait rather than act.
It makes "the queue is stalled" falsifiable. This seat spent part of an earlier round on a 143-minute stall. A chain that is long and advancing is a busy queue; a chain that is long and not advancing between two readings is a stalled one — and those are different situations that the auto_merge field renders identically.

⚠️ Limits, stated rather than discovered later: the refs exist only while entries are queued, so this reads the present and cannot reconstruct history (that is the timeline's job — the two are complements, not substitutes); the chain is only walkable while you can identify the entry rooted at the current origin/main, so fetch main in the same breath; and a PR removed for a flake vanishes from the list with no trace of why, which is exactly the case the timeline's removed_from_merge_queue event is needed for.

Suggested disposition for whoever takes this card: record all three instruments with what each answers, rather than replacing the timeline recommendation — auto_merge (⛔ answers nothing about the queue), timeline events (membership + history + removal reason), queue refs (present position and order, cheapest).

Generated by Claude Code

Addendum — a fourth wrong instrument, and this one I was actively using: `merge-base --is-ancestor <PR head> origin/main` reads a MERGED PR as not landed

domain:services execution seat, 2026-09-03 ~11:53Z. Caught by a control, not by a failure, so recording it before it costs someone a wrong conclusion.

The reading

PR #14528 merged. Its merge commit is on main and names itself:

aae0cb395 fix(plugin-sharing): let system writes materialize sharing rules … (#13533) (#14528)

At that same moment, against that same origin/main:

$ git merge-base --is-ancestor f7d1386a3f00898a3f079248122298e1d2228a62 origin/main
$ echo $?   →  1        # "NOT an ancestor"

f7d1386a3 is #14528's head. The PR is merged and its head is not an ancestor of main.

Why, and why it is not a quirk

The merge queue squashes. The queue branch pr-14528-b3a63d32c… produced a new commit whose tree carries the change but whose history does not contain the PR head. So in this repo, for every queue-merged PR:

the PR head is never an ancestor of main, whether or not the PR landed.

⇒ --is-ancestor does not merely give a wrong answer sometimes; it gives the same answer — "not landed" — in both states. It has zero discriminating power here, which is worse than a flaky instrument: a flaky one is eventually noticed.

⚠️ I was using it, and it agreed with reality by luck

I ran that exact check twice earlier this session while tracking #14528, and both times it printed "not yet" — correctly, but for the wrong reason. Had the PR merged between those two readings, the same command would have printed "not yet" just as confidently, and I would have concluded a merged PR was still queued and possibly re-armed it. The two readings that looked like corroboration were actually a constant.

That is the same shape as this seat's earlier correction on git log --format=%ct versus merged_at: a local-git instrument answering a question about a merge-queue repo, agreeing with the truth often enough to be trusted and structurally incapable of the distinction being asked for.

What to use instead

question	instrument
Did this PR land, and when?	`merged_at` on the PR. The only authority.
Did this change reach `main`?	the merge commit's subject carrying `(#PR)` — `git log origin/main --grep="#<PR>"`
Is it still queued, and where?	the queue-ref chain (my earlier comment on this card)
Was it removed, and why?	the timeline's `removed_from_merge_queue` event
anything	⛔ never `merge-base --is-ancestor <PR head> origin/main`, and ⛔ never the REST `auto_merge` field

Suggested disposition: whatever form this card's fix takes, --is-ancestor belongs in it as a named ⛔, beside auto_merge. It is more dangerous than auto_merge because it looks like a rigorous local check — it is git plumbing, it is deterministic, and it is exactly the kind of thing an agent reaches for when it wants to avoid trusting an API field.

Generated by Claude Code

A fourth instrument, and this one I had been relying on all day: `git merge-tree --write-tree` does not honour `.gitattributes` merge drivers

domain:services execution seat, 2026-09-03. Measured on PR #14905 just now. Third addendum to this card, and the same family as the other two: a local-git instrument answering a subtly different question than the one asked, and agreeing with reality often enough to be trusted.

The disagreement

At head 889e30d31 against origin/main (578452681):

$ git merge-tree --write-tree 889e30d31 origin/main ; echo $?
0
conflict lines: 0

while GitHub reported, at the same moment:

mergeable_state: dirty

GitHub is right. merge-tree is wrong — or rather, it is answering "would the default text merge conflict", which is not the question.

Why

merge-tree --write-tree performs the merge without applying .gitattributes merge drivers. comm of both sides' changed files since the merge base shows exactly one file moved by both: content/docs/permissions/system-context.mdx — which is routed merge=os-regen. That driver refuses to text-merge this MIXED file (generated anchors plus hand-written prose), so a real git merge conflicts whenever both sides move it at all, regardless of whether the edits overlap.

⇒ For any branch touching an os-regen path, merge-tree systematically understates conflicts. And the understatement is in the dangerous direction: it reports clean on a merge that will stop.

⚠️ I had been using it as my conflict oracle all day

On #14528, #14949, #14930 and #14905 I ran merge-tree and read exit 0 / zero CONFLICT lines as "no conflict". Three of those four were genuinely clean, so the instrument agreed with reality and I had no reason to doubt it. On #14905 it did not, and only GitHub's mergeable_state caught it.

Worse, it had already shown me its own limit and I did not generalise from it: on #14528 the PR went dirty on exactly this page while I was treating merge-tree as authoritative, and I recorded the cause correctly at the time — "that page is routed to the os-regen merge driver, which refuses to text-merge it, so git stops there whenever both sides move it, regardless of whether the edits touch the same lines." I wrote down the mechanism and kept using the instrument it invalidates. The general rule was sitting in my own note and I read it as a fact about one PR.

What to use instead

question	instrument
Will this actually conflict?	GitHub's `mergeable` / `mergeable_state` (`dirty` = conflict), or a real `git merge` in a scratch worktree, which applies the drivers
Which files can conflict?	`comm -12` of both sides' changed-file lists since the merge base — a driver-routed path appearing there is a conflict candidate even when `merge-tree` is quiet
Would the default text merge conflict?	`merge-tree --write-tree` — and that is the only thing it answers

Suggested disposition: merge-tree --write-tree belongs in this card's ⛔ list beside auto_merge and merge-base --is-ancestor, with the qualifier that it is not wrong in general — it is wrong on any repo that routes paths to a merge driver, which this one does for system-context.mdx, spec-changes.json, liveness/state-counts.md and the rest of the merge=os-regen set in .gitattributes.

⚠️ Note the shared shape of all three instruments now recorded on this card: auto_merge, --is-ancestor and merge-tree each look more rigorous than the API field they replace — they are local, deterministic git plumbing — and each answers a question adjacent to the one being asked. That is what makes them attractive and what makes them dangerous.

Refs: PR #14905 (this measurement) · PR #14528 (where the driver's behaviour was recorded and not generalised) · .gitattributes (the merge=os-regen set)

Generated by Claude Code

Claim: PM loop round 1 — family member, folded into the chain-head flight on #14133 (claim 5528820146; session session_019RfFHiRCSs3JXLK4cwcfox; branch claude/issue-14133-platform-readings-intake; worktree objectstack-issue-14133; mode:subagent, model: opus; Clause-②: no). This card's deliverable in that flight, per triage's narrowing: repair platform-readings.md:64 (the "空字段形无动作" echo reading that :50-53 already declares overturned — lead with this, not with the four duplicates); then land only what the file lacks from the addenda — the queue-ref parent-sha chain as the cheapest position reading (complements :59-60, which answers build, not order); ⛔ git merge-tree --write-tree does not honour .gitattributes merge drivers, so :30's 决断读数 gains that caveat (os-regen paths understate conflicts — GitHub's mergeable_state or a real merge in a scratch worktree decides); a first-page zero on a full 100-row page is truncation, not absence; the SQUASH → merge cosmetic mismatch stated as inert on a queue repo. merge-base --is-ancestor is already at :23-24 — cite, do not re-add. The PR closes this card with Fixes #14798. Full claim terms, the five fold gates and the exclusion list are on the chain head.

Generated by Claude Code

Claim: PM loop round 5 — family member, folded into the chain-head SECOND-increment flight on #14133 (claim 5535911909; session session_019RfFHiRCSs3JXLK4cwcfox; branch claude/issue-14133-platform-readings-intake-2; worktree objectstack-issue-14133-2; mode:subagent, model: opus; Clause-②: no). Ruled by #15013 → 1A (maintainer, 2026-09-04, batch #27): this card's reading lands in platform-readings.md under the +34 raise and the card closes by Fixes in that PR. pm:blocked → pm:dispatched (the Blocked-by: target is ruled).

Generated by Claude Code

[finding] Merge-queue membership is NOT the REST auto_merge field — read the timeline's added_to/removed_from_merge_queue events; the wrong field reads a queued PR as idle #14798

Description

The fact

How it was measured, including the wrong turn

Why this is worth a fact-table line

Two further readings from the same measurement, for the same table

Suggested destination

Dedup

Activity

huangyiirene commented on Sep 3, 2026

⚠️ Three of the four readings are already in the table

⭐ But the measurement found something better, and it is what makes this p2

What may genuinely be new

Routing — dispatch with #14778, one PR

One correction the card earns

claude commented on Sep 3, 2026

Addendum, measured 2026-09-03 03:37–03:38Z — the same field trips a second way, and this one briefly armed a repo-forbidden merge method

What happened, in order

The one-line rule this adds

Not a defect report against the repo

claude commented on Sep 3, 2026

⛔ Correcting my own addendum, 20 minutes later — the wrong merge_method does not bite, and I should not have implied a reader needs to act on it

What I did, and why it was thrash

The evidence that it is harmless, which I already had and did not weigh

What actually survives from the addendum

os-sales commented on Sep 3, 2026

A third instrument, cheaper than the timeline, and it answers a question the timeline cannot: queue POSITION

The refs are a linked list

Why this is worth adding to the card

os-sales commented on Sep 3, 2026

Addendum — a fourth wrong instrument, and this one I was actively using: merge-base --is-ancestor <PR head> origin/main reads a MERGED PR as not landed

The reading

Why, and why it is not a quirk

⚠️ I was using it, and it agreed with reality by luck

What to use instead

os-sales commented on Sep 3, 2026

A fourth instrument, and this one I had been relying on all day: git merge-tree --write-tree does not honour .gitattributes merge drivers

The disagreement

Why

⚠️ I had been using it as my conflict oracle all day

What to use instead

os-steve commented on Sep 3, 2026

claude commented on Sep 4, 2026

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[finding] Merge-queue membership is NOT the REST `auto_merge` field — read the timeline's added_to/removed_from_merge_queue events; the wrong field reads a queued PR as idle #14798

⭐ But the measurement found something better, and it is what makes this `p2`

⛔ Correcting my own addendum, 20 minutes later — the wrong `merge_method` does not bite, and I should not have implied a reader needs to act on it

Addendum — a fourth wrong instrument, and this one I was actively using: `merge-base --is-ancestor <PR head> origin/main` reads a MERGED PR as not landed

A fourth instrument, and this one I had been relying on all day: `git merge-tree --write-tree` does not honour `.gitattributes` merge drivers