fix(scheduler): read workflow identity that run-name cannot rewrite - #1986
fix(scheduler): read workflow identity that run-name cannot rewrite#1986seonghobae wants to merge 9 commits into
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The REST fallback built workflow identity from a run's own `name`, which GitHub renders through `run-name:`. For the three review workflows that declare one, that field carries the pull request and head SHA instead of the workflow's identity, so it matches none of the declared names the policy predicates compare against. Joined on `check_suite_id` for one head, all three workflows declaring `run-name:` diverge from GraphQL's `workflow.name` and all six without it are identical. On that path `is_strix_context` returned False for a real Strix check run and the coverage-evidence predicate returned False for a real coverage-evidence check. `REST_UNKNOWN_GITHUB_ACTIONS_WORKFLOW` did not engage because it is keyed on the name being absent, and here the name is present and wrong. Read the declared name from the workflow resource instead, cached per invocation through the existing reset entry point. A run whose workflow cannot be identified now contributes no entry, so the absent-identity sentinel engages as designed. Prefix-stripping the rendered title was rejected: `run-name:` need not begin with the workflow's name, and assuming it does is the same unenforced parse contract. Also announce both GraphQL-to-REST fallbacks. Neither could previously be observed at any sample size: the permission branch is not retried and raises ahead of any print, and the transient branch raises on the final attempt before `gh_graphql` prints its retry line, so `attempt 4/4` is a string this program cannot emit. Refs #1941 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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📝 WalkthroughWalkthroughGraphQL REST 폴백의 오류 원인 경고를 추가했습니다. REST 실행은 렌더링된 실행 이름 대신 정적 워크플로 이름으로 식별합니다. 정적 이름은 캐시하며, 활성 실행 캐시 초기화 시 함께 삭제합니다. ChangesREST 폴백 및 워크플로 식별
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟠 High · up to REST fallback can still fail entirely when a workflow resource is missing or when concurrent identity lookups amplify API failures. These cases should be fixed before merge so scheduler scans remain available and unidentified workflows are safely excluded. Sequence Diagram(s)sequenceDiagram
participant Scheduler
participant workflow_static_name
participant GitHubActionsAPI
Scheduler->>GitHubActionsAPI: 실행 목록에서 workflow_id 조회
Scheduler->>workflow_static_name: workflow_id 전달
workflow_static_name->>GitHubActionsAPI: 정적 workflow.name 조회
GitHubActionsAPI-->>workflow_static_name: 정적 워크플로 이름 반환
workflow_static_name-->>Scheduler: 캐시된 이름으로 실행 식별
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The contaminated workflow name does not withhold coverage evidence: the predicate is negative and the filter keeps a check when it returns False, so the REST path admits evidence GraphQL rejects. Pin that direction explicitly, since the failure reads as evidence loss otherwise. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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In `@scripts/ci/pr_review_merge_scheduler_core.py`:
- Around line 1274-1276: Update workflow_static_name() or its
github_resource_inaccessible() classification so gh “Not Found” HTTP 404 is
treated as an inaccessible resource, caches an empty workflow name sentinel, and
allows fetch_workflow_names_by_check_suite_rest() and rest_pr_node() to continue
without including that check suite in the result map. Keep transient errors such
as HTTP 502 propagating, and add a regression test covering the 404 exclusion
behavior.
- Around line 1268-1272: workflow_static_name()의 _workflow_static_names_cache
조회·조회·저장 흐름을 키별 lock 또는 single-flight 방식으로 보호해 동일한 (repo, workflow_id)에 대한 동시
gh_api_json() 호출이 한 번만 실행되도록 수정하세요. 다른 키의 조회는 병렬성을 유지하고, 캐시된 결과 반환 동작은 보존하세요.
fetch_open_prs_rest() 경로에 동일 workflow_id를 동시에 조회해 실제 API 호출이 한 번뿐인지 검증하는 회귀 테스트를
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One GraphQL failure message can satisfy both predicates: a partial failure arrives as 200 with an `errors` array, so a forbidden field and a `server error` marker can share a message. An if/else reported only the permission cause and silently under-counted transient failures in the one log this line exists to make countable. Test each predicate independently and join the labels. Only a transient failure is retried -- a permission failure matches neither retry predicate and raises on the first attempt -- so the transient label now carries that fact rather than leaving "was it retried?" open. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
…osed The docstring justified the unreadable-workflow path by saying the fail-closed sentinel engages. That holds for is_strix_context, which names the sentinel and keeps the evidence, but not for is_non_authoritative_coverage_check_run: it is a negative predicate that answers True for one exact declared name, so unknown identity leaves coverage evidence admitted. The behaviour is unchanged and unregressed -- unknown identity keeps whatever polarity each consumer already had, and this function only removes the contaminated-identity case. It is the justification that was wrong. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Verified by running it. Scoped to head Gate
What I checked first, because the diff removes lines from files merged hours ago
That last line is the one that matters: the count still comes from the audited set, not the supplied one. #1983's matcher also survives untouched, along with both of its tests. Worth stating explicitly because this change is about the same underlying problem, so the two could plausibly have been conflated. They are complementary rather than competing:
The new lookup is load-bearing, not decorativeForcing So the tests depend on identity actually resolving, rather than merely executing the lookup. One design note I agree withThe docstring is explicit that an unreadable workflow yields an empty name and that this is not uniformly fail-closed: 🤖 Addressed by Claude Code |
병합자 검증 (host 1) — head
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Current-head repair evidence —
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seonghobae
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My earlier verification was scoped to head Same command, both headsNot a failure — a tree that does not finish. That is the worse shape, because in CI it surfaces as a timeout with no failing test to point at. Where it stalls, and why that is not the culpritA verbose run capped at 300 s was sitting at 32%, inside
Individual files are effectively unchanged between the heads. So this is not one hanging test; it is a distributed slowdown that only shows in the total. What that shape suggests, stated as inference rather than measurementThree of the four new commits touch workflow identity reads in Note on scopingThe reason this was caught rather than merged on my earlier approval is that the approval named its sha and said it did not extend past it. That convention was adopted this morning after one of my approvals was invalidated the same way, and this is the first time it has prevented something concrete. 🤖 Addressed by Claude Code |
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Retracting my previous comment. There is no regression established, and "does not complete" is false. A peer ran this same head to completion: 2990 passed, 1 skipped, 0 failures, in 926 seconds. My cap was 600. I measured the relationship between my timeout and the suite's duration, and reported it as a property of the tree. What the machine was doing while I measuredThree to four times oversubscribed, sustained. A 130-second suite reaching 600+ needs no code change to explain, and my two timings were taken hours apart under uncontrolled and different load — so they were never the same population to compare. My own evidence already argued against meI reported it in the previous comment and then read past it:
If a code change made the suite 4.6× slower, the sampled files would show it. They showed nothing — the new head was marginally faster on the isolated test. I labelled that "a distributed slowdown", but the ordinary cause of a slowdown that appears only in the total and never in the parts is the environment, not the code. What stands and what does notI am not claiming the opposite either. Withdrawing a measurement and asserting its negation are different claims, and I have no evidence for the second. No performance judgement should be made on this machine while several suites run concurrently. Any timing taken now measures scheduler contention. The scope note from my earlier comment still holds for correctness rather than speed: my verification was of head 🤖 Addressed by Claude Code |
Exact-head Noema selective rerun receipt
No merge/bypass authority is inferred from this receipt. The replacement Noema result and the remaining required exact-head evidence must become terminal first. |
리뷰 지적 두 건은 이미 반영돼 있고, 실패 4건은 푸시로 못 고칩니다 (
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| 지적 | 현재 head 상태 |
|---|---|
workflow_static_name 캐시 경합 → 키별 lock / single-flight |
_workflow_static_name_locks + 이중 확인 읽기. 다른 키는 병렬 유지. test_workflow_static_name_coalesces_concurrent_reads_per_workflow가 concurrent.futures로 단일 호출을 단언 |
삭제된 워크플로의 HTTP 404를 접근 불가로 처리하고 맵에서 제외 |
github_resource_inaccessible(exc) or "HTTP 404" in str(exc) → 빈 이름 캐시 → 해당 suite는 맵에 없음. HTTP 502는 그대로 raise되며 두 테스트가 이를 고정 |
reset_active_workflow_runs_cache가 값 캐시와 lock 레지스트리를 함께 비우므로 실행 경계를 넘는 lock이 남지 않습니다.
실패 4건 — 전부 이 브랜치 밖 원인
CodeQL compatibility analysis (actions) Release runner or enforce current-head CodeQL verdict
CodeQL compatibility analysis (python) Release runner or enforce current-head CodeQL verdict
noema-review Prepare Noema model verdict
opencode-review Fail closed without a current-head OpenCode verdict
넷 다 "다른 것이 채워줘야 하는 자리"에서 죽습니다. opencode-review의 그 스텝은 디스패치 워크플로가 verdict를 발행한 뒤 이 잡을 재실행한다는 전제로 설계돼 있고, CodeQL 둘은 러너를 놓아주기 위해 의도적으로 실패하는 스텝입니다. 고칠 내용 결함을 지목하는 실패가 하나도 없습니다.
참고로 오늘 00:14Z 이후 이 저장소에 게시된 리뷰 판정은 두 건뿐이고 둘 다 REQUEST_CHANGES + Model pool: exhausted입니다.
그래서 푸시하지 않았습니다
- 고칠 코드가 없습니다. 위 넷 중 이 브랜치의 변경으로 해결되는 것이 없습니다.
- 브랜치 갱신도 하면 안 됩니다.
behind=2이지만 현재 head에 큐 대기 체크가 1건 있습니다. 이 저장소 규칙(Scheduler pre-review update-branch discards in-flight checks under queue saturation: 76/77 merges since 09-04 had 0/12 required contexts at merge time #1935)은 in-flight 체크를 "갱신이 버릴 증거"로 보고 그 경우 사전 갱신을 막습니다.
로컬 게이트는 이 head에서 통과합니다 — 2984 passed / 1 skipped, coverage 100%(누락 0 · 부분분기 0), interrogate 100%. 수집 2985로 main과 동일하고, 이 PR이 tests/에 더하는 파일은 0개입니다.
이 PR은 "검증 완료, 소유자 조치 대기" 상태입니다.
1 participant
Closes part of #1941.
What is wrong
fetch_workflow_names_by_check_suite_restbuilds the REST fallback's workflow identity from a run'sown
name. That field is the rendered run title: when a workflow declaresrun-name:, GitHubsubstitutes it, so
namecarries the pull request and head SHA instead of the workflow's identity.GraphQL's
workflowRun.workflow.nameis the declaredname:in both cases, so the two paths reportdifferent quantities — while the function's docstring promises they do not.
Joined on
check_suite_idfor one.githubhead, all nine workflows on it:workflow.namerun.nameopencode-review.ymlRequired OpenCode ReviewRequired OpenCode Review ContextualWisdomLab/.github#834@ab457b69…noema-review.ymlRequired Noema Review… #834@ab457b69…strix.ymlStrix Security Scan… #834@ab457b69…pr-review-merge-scheduler.ymlRequired PR Review Merge Schedulersast-semgrep,python-security,security-scan,codeql-pr,agent-review-runtime-quality-ciThe split is exactly
run-name:presence: the three workflows that declare one all diverge, the sixthat do not are all identical.
Why the existing guard does not catch it
Consumers compare that value by equality against declared names, and the three affected ones fail in
three different directions — reproduced on live pre-fix payloads by host 1, independently of this
branch:
is_strix_contextFalsefor a realstrixcheck run (.github#1982headf7688184)is_opencode_check_runTrue(#1978,#1977)is_non_authoritative_coverage_check_runFalse, socoverage_evidence_indiceskeeps a check GraphQL excludesThe coverage-evidence one is the worst direction and is easy to misread, because the predicate is
negative:
coverage_evidence_indiceskeeps a check when it returnsFalse. A contaminated workflowname therefore does not withhold evidence there — it admits central metadata-only evidence that the
GraphQL path rejects. (That path is reached only when
SCHEDULER_REQUIRED_WORKFLOW_REPOSITORYis set;how often that holds in production is not measured.)
is_opencode_check_runsurvives because its first clause matches the check-run's own job name beforeworkflow identity is consulted — ordering, not a designed guard.
REST_UNKNOWN_GITHUB_ACTIONS_WORKFLOWexists for exactly this gap and does not engage: it is keyed onthe name being absent, and here the name is present and wrong.
is_strix_context's rescueclause repeats the same assumption — it requires
workflow_name in {None, REST_UNKNOWN_…}, so acontaminated name defeats the sentinel and the rescue clause together.
The change
Identity now comes from the workflow resource.
workflow_static_name(repo, workflow_id)reads thedeclared
name:, whichrun-name:never rewrites, so REST reports the same quantity GraphQL does.Prefix-stripping the rendered title was rejected deliberately:
run-name:is not required to beginwith the workflow's name, and assuming it does is the unenforced parse contract #1941 is about. A run
whose workflow cannot be identified now contributes no entry, so the absent-identity sentinel
engages as designed rather than being bypassed by a contaminated one.
The lookup is cached per invocation and cleared by the existing
reset_active_workflow_runs_cacheentry point — workflow identity never changes mid-run, so it needs no mutation-driven invalidation, and
reusing that function avoids adding call sites a later change could forget.
Both GraphQL→REST fallbacks now announce themselves. They were completely silent, and neither could
ever have been observed in a log:
message is then consumed by the caller's
except;gh_graphqlprints its retry line, soattempt 4/4is a string this program cannot emit.So the fallback's frequency was not merely unmeasured — it was unmeasurable at any sample size.
Each cause is tested independently rather than as an if/else, because one message can satisfy both:
GraphQL answers a partial failure with 200 and an
errorsarray, so a forbidden field and aserver errormarker can arrive together. Reporting only the first would under-count the other in thevery log this line exists to make countable. The transient label also records that retries were
exhausted — only transient failures are retried; a permission failure matches neither retry predicate
and raises on the first attempt. (Both refinements came from review: host 1 for the overlap, peer 1 for
the retry wording.)
Evidence
Two new regression tests:
is_strix_contextrecognising a Strix run behind a rendered run name, andcoverage evidence staying excluded — the latter written in the fail-open direction so the severity
reads correctly to the next person. The three stale fixtures that encoded
run.nameas identity areupdated to the new contract. Full suite,
coverage report(fail_under = 100) andinterrogateallpass locally.
Reverting just the identity resolution back to
run.namefails 5 of the file's tests, including bothnew ones, so they pin the behaviour rather than sitting next to it.
Fixtures can only confirm what they were written to assert, so the changed function was also run
against live GitHub data for the head in the table above — every suite on it, resolved by the new code:
9 of 9 suites resolve, and each resolved value equals the
workflow.nameGraphQL returned for the samecheck_suite_id— which is the contract the docstring claims and the change restores.Cost of the extra lookup, measured rather than estimated. Resolving identity from the workflow
resource adds API calls on the fallback path, which is reached when GitHub is already unhealthy — so
the multiplier matters. It is bounded per repository, not per pull request, because the cache is keyed
(repo, workflow_id)and lives for the invocation:So a queue scan of 20 pull requests in one repository costs ~9 extra calls, not 20 × 9. The bound is
per mutation interval rather than per invocation, since
reset_active_workflow_runs_cacheis alsocalled after force-cancel, rerun and dispatch, and clears this cache with it.
workflow_static_namere-raises anything that is not a permission failure, exactly as the siblingruns-list call in the same function already does. Widening its tolerance would put two different
error policies inside one function, so the behaviour class is deliberately unchanged; only the call
count moves, by the amount measured above. (Raised by peer 1 during review.)
Residual risk this PR does not remove, stated rather than glossed. When the integration cannot read
a workflow at all, identity is unknown and
REST_UNKNOWN_GITHUB_ACTIONS_WORKFLOWstands in. Thatsentinel is not uniformly fail-closed — measured on this branch's own code:
is_strix_contextnames the sentinel and keeps the evidence; the coverage predicate answers True onlyfor one exact declared name, so unknown identity leaves coverage evidence admitted. This PR removes
the contaminated-identity case (the last row) and leaves the unknown-identity case exactly as it
was, so it is not a regression — but "the sentinel engages, therefore it is safe" would have been the
wrong justification, and an earlier revision of this description said so. (Found by host 1, reproduced
independently here.)
Fixing that would mean deciding that unknown identity must never count as authoritative evidence —
a policy change, and out of scope for this one.
Not measured: how often the REST path is actually taken in production. The warning lines are what
make that answerable from the next scheduler run onward; I am not claiming a current impact rate.
Root cause is shared with #1983, which is deliberately not cross-cited — each PR stands on its own
evidence so that neither becomes the other's only support.
Credit:
core.py:1250was flagged as suspicious by peer 1; theopencode_coverage_identity.py:143-147precedent showing the repo already knew the rendering rule was found by host 1; peer 1 also found that
attempt 4/4is unreachable. host 1 reproduced all three consumers on live pre-fix payloads withoutreading this branch, and corrected the direction of the coverage-evidence case — an earlier
revision of this description called it evidence loss. It is the opposite, and worse.
Developer experience
A silent fallback becomes a labelled one, and the label names which of the two causes fired. Anyone
asking "does this run on the REST path, and why" reads one log line instead of reasoning about which
predicates
gh_graphqlretries.User experience
No user-visible change. The effect is that Strix and coverage evidence keep being recognised when the
scheduler is on its fallback path, so a pull request is judged on the same evidence whether or not
GitHub's GraphQL endpoint was healthy at the time.
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