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Resolve cold shared-preparation deadline and finish coordinator acceptance

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id: hf-2026-09-23-fix-coordinator-shared-preparation-and-follower-waiting url: url://handoff/handoffs/hf-2026-09-23-fix-coordinator-shared-preparation-and-follower-waiting title: Confirm the live url://buildtest/ coordinator carries the upstream shared-preparation fix (BuildTestEmbedded PR 1168), then complete summary: Remaining: verify the deployed coordinator includes BuildTestEmbedded PR 1168 (one build-only runner invocation for all shared-preparation rules), which replaced the serialized per-rule chain diagnosed 2026-09-27; then complete. PR 1082 merged 2026-09-27 and was deployed 09:32 UTC that day. created: 2026-09-23T06:06:35.669Z completed: null dependencies:

Resolve cold shared-preparation deadline and finish coordinator acceptance

UPDATE 2026-10-08 — the 2026-09-27 deadline finding was fixed upstream

The linear-chain + per-rule cp -a snapshot cost diagnosed in run 6fc39d79 was replaced upstream by https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1168 (2026-09-30, "Prepare every shared workspace build rule in one build-only runner invocation") and https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1284 (2026-10-06, removed the unused parallel path), plus #1179/#1172/#1195/#1242/#1265 in the same area. NOT verified by this session: whether the live url://buildtest/ coordinator includes them. Remaining for this handoff: confirm the deployed coordinator carries #1168, then complete it.Written 2026-10-02 20:49:56 UTC, lane up585-verify. RE-VERIFY: This is a write-time snapshot. Re-read https://buildtest.kotlin.build/api/runs (paged), https://buildtest.kotlin.build/run?id=1789d39c and https://buildtest.kotlin.build/api/health; inspect current PRs with gh pr view <URL> --json state,headRefOid,mergeStateStatus,statusCheckRollup,mergedAt and confirm branch heads with git ls-remote. The snapshots retained below are history; their old watch, rerequest, publishing and deployment instructions are superseded by this section. This verification lane changed no PR and is not authorized to merge, enqueue, deploy, restart, publish, or complete this handoff.

Current mission and precise remaining item

The original Mission below is preserved: followers must await shard 0's preparation outcome, shared preparation must avoid repeated common-module work, and setup failures must be infrastructure outcomes. Those implementation changes are merged. The remaining live acceptance item is narrower: determine why cold preparation for https://buildtest.kotlin.build/run?id=1789d39c did not publish cache-ready inside 1200s even though its single Runner 0.0.120 emitted 16 successful build-rule events and done; force that exact condition through the public preparation API, fix the owning mechanism if confirmed, and demonstrate cache-ready under the unchanged 20-minute deadline on the affected multi-shard workload. The failed operation after/beside the completed batch is not established from the available event order. Do not call the old serial child-copy mechanism the cause of this newer failure without evidence.

This handoff is INCOMPLETE for live acceptance. No additional UrlProtocol source work belongs to it. The remaining relay proposals from the closed https://github.com/CodexCoder21Organization/UrlProtocol/pull/585 are assigned by its latest comment to url://handoff/handoffs/hf-2026-09-20-make-urlprotocol-main-reliably-green-land-the-launcher-pin-then-merge-the-six-reviewed-prs-and-fix-the-last-flake (https://www.handoff.wasmserver.com/handoffs/hf-2026-09-20-make-urlprotocol-main-reliably-green-land-the-launcher-pin-then-merge-the-six-reviewed-prs-and-fix-the-last-flake). The open TCP https://github.com/CodexCoder21Organization/UrlProtocol/pull/626 and downstream provider publication/deploy/acceptance belong to url://handoff/handoffs/hf-2026-09-09-implement-deploy-to-containernursery-and-register-two-dummy-model-providers-random-text-random-image-for-photogenerationmanagerwui-then-verify-on-production. A same-day shared preparation deadline is already recorded in url://handoff/handoffs/hf-2026-09-27-finish-buildtestembedded-projection-retention-work-after-cache-preparation-is-fixed (run 320deef5; https://www.handoff.wasmserver.com/handoffs/hf-2026-09-27-finish-buildtestembedded-projection-retention-work-after-cache-preparation-is-fixed). Consolidate/assign that preparation investigation before closing this acceptance handoff; do not duplicate the UrlProtocol PR work.

Verification findings

  • OBSERVED: https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1082 merged 2026-09-27 and https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1090 merged 2026-09-26. Current main inspected at f3efa847c6e78233cd006f42528bd6534a578c26 retains one owned20-minute preparation deadline (SharedPreparationDeadline.kt:16); followers wait on shard 0's outcome before allocating a cold droplet (BuildTestEmbeddedService.kt:19912). No fixed five-minute follower abandonment remains in this path.
  • OBSERVED: The historical N-1 stage-copy mechanism is addressed by merged https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1116 (sole writers reuse the private stage in place), https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1163 (bounded cache scan/publication copy), and https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1168 (all inferred rules in one runner for Runner >= 0.0.119; retained older versions keep their ordered chain). Main selects Runner 0.0.120. Source tests include common-module reuse, no-copy deadline coverage, and batch cancellation/publication ownership; none were executed by this lane.
  • OBSERVED: https://github.com/CodexCoder21Organization/UrlProtocol/pull/585 is CLOSED, not merged, head 2d340a9def30206a398a7063e0227909122abf3b; both retained checks are FAILURE. Its latest comment https://github.com/CodexCoder21Organization/UrlProtocol/pull/585#issuecomment-5955474384 closes the integrated change and preserves its focused proposals. The comment says TCP landed, but fresh GitHub verification shows https://github.com/CodexCoder21Organization/UrlProtocol/pull/626 OPEN at 452ecde9196e2f0bc19645b97d111139463b5c55, with both Actions and required remote check SUCCESS and the informational remote-build check IN_PROGRESS. Live refs match those heads. Neither PR was edited.
  • OBSERVED: W67 branch remains c06c53456280bfef7588bff07855edef922c46bf, verified with git ls-remote. Its findings accurately describe the September27 queue snapshot and byte-matched deployment at that time; they cannot establish today's acceptance or today's full Embedded binary identity. No current full Embedded jar SHA was verified by this lane.
Run Workload Cold preparation start / first cache-ready (UTC,2026-10-02) Interval / outcome
https://buildtest.kotlin.build/run?id=5614a294 UrlProtocol,10 shards, Runner 0.0.120 18:29:09 /18:44:04 895s (14m55s); followers created after ready; all follower installs appear in the retained prefix
https://buildtest.kotlin.build/run?id=784be172 UrlProtocol,10 shards, Runner 0.0.120 18:15:56 /18:34:04 1088s (18m08s); followers created after ready
https://buildtest.kotlin.build/run?id=1789d39c UrlResolver,10 shards, Runner 0.0.120,1024MiB runner heap 20:04:52 /no ready; errors20:24:54 Elapsed:1200113ms; Deadline:1200000ms; all 10 shards fail before tests

OBSERVED: The complete 1789d39c log emits one runner_process_started, 16 successful build_rule events and done, followed by the common deadline failure; no follower droplet is created for that final preparation attempt. Its captured bounded rule API had only 13 rows. The raw log contains exactly 16 discovered rules and 16 successful completions, with matching normalized name sets. Thus missing projection rows do not establish unfinished compilation. The two successful preparation intervals prove on-time cold preparation occurs now, but the newer failure refutes blanket live acceptance. Cross-droplet BUILDING spans include later runner/build work and must not be compared directly to the shard 0 preparation deadline.

OBSERVED: Captured list/pages warn of a disconnected/gapped projection. Final health reports projectionFeedConnected=true, projectionFeedGapDetected=true, projectionFeedResetRequired=true. All timings above are retained raw event/log evidence, not a claim that the dashboard is currently caught up. The precise operation between batch completion and readiness remains unknown; no cause such as host load is asserted.

Added evidence refs (existing refs and chain retained below)

Repo Branch Remote head SHA PR Contents State
CodexCoder21Organization/PlanRepository https://github.com/CodexCoder21Organization/PlanRepository/tree/wip/up585-verify-2026-10-02 3461c349090098eb07a056404ee0a70d624bfef2 none (evidence-only checkpoint) https://github.com/CodexCoder21Organization/PlanRepository/tree/wip/up585-verify-2026-10-02/handoffs/artifacts/up585-verify-2026-10-02 ? findings, full484070-byte1789d39c log, bounded successful-run excerpts, timing/rule responses, PR/health snapshots, original mission and report Pushed; remote SHA equals local HEAD. No source/test changes. Local tests: 0 passed, 0 failed, 0 executed. No builds/CI runs submitted.

Deployed/published by up585-verify: none. No production changes were made. Historical deployed/published rows below remain historical; they were not re-certified as today's exact binary.

Next steps

  1. Re-verify the raw1789d39c sequence and current preparation owner. Consolidate it with the already-recorded320deef5 acceptance blocker rather than assigning relay/TCP work here.
  2. Establish the exact owned command/stage that kept preparation from ready publication after the completed batch; use public-API deterministic reproduction before any code fix. Preserve1200s and existing assertions/iterations. No blind CI rerun.
  3. After that cause is reproduced and corrected by its owner, confirm cold multi-shard readiness inside the unchanged deadline on the affected workload, not just a warm cache or aggregate build chart. The supervisor owns final review and any completion decision.

Operational findings: the brief's /api/runs/<id> returns404 on the current WUI. Use paged /api/runs, /api/run-timing?id=<id>, /api/build-rules?id=<id>, and /log/raw?id=<id>. Initial raw reads returned503; one returned500 with getBuildLogChunk AmbiguousRpcRequestException/EOF; two full reads ended short near1MiB. Bounded prefixes recovered the successful-run boundaries, and a later complete failed-run log recovered the event sequence. The report-challenge skill was read but its CLI automatically enqueues/merges, forbidden by this lane; challenge evidence is preserved in findings for supervisor handling.

Local verification counts: 0 passed, 0 failed, 0 executed (verification-only, no changed code/tests). Observed preparation samples: 2 cache-ready inside 20min, 1 deadline failure; these are production observations, not a controlled statistical test series.

Historical mission, findings and refs (preserved verbatim; superseded next steps are not current instructions)

Checkpoint 2026-09-27 08:03 UTC (W67; newest state)

UPDATE 2026-09-27 10:45 UTC ? 585's required check now fails on the shared-preparation deadline itself (root cause found)

Run https://buildtest.kotlin.build/run?id=6fc39d79 (585 head 3aabaf6b, on the newly deployed coordinator): all 10 shards TIMEOUT: Shared workspace module cache preparation exceeded its deadline. Elapsed: 1200136ms Deadline: 1200000ms. The new coordinator behaved as designed (one owned deadline, followers stopped, INFRASTRUCTURE classification). Evidence (run dir build.log + build-rule-results.json copied read-only from /root/buildtest-data/runs/6fc39d79/):

  • Shard 0 prepared 8 inferred rules strictly serially; actual rule time 7.3 min total (205 s, 37, 30, 44, 43, 42, 38; the 8th never started). The rest of the 20 min went to coordinator-side gaps BETWEEN rules: 3.4 min, 1.5, 1.4, ? (runner processes themselves start within ~9 s).

  • Mechanism: BuildTestEmbeddedService.kt ~line 18237 (from PR 1082, commit a4201b79) builds the plan as a linear chain ? rule i depends on rule i-1 ? so sharedCachePreparationParallelism (default 4) is never used; and BuildDriver.snapshotSharedPreparationStage does a full cp -a stage/. source-N/ of the growing stage (incl. .buildcache resolved closures) before every non-initial child, plus a per-child merge. N rules ? N-1 full stage copies in series.

  • The chain was 1082's deliberate "single common compile" design (later rules reuse the common module compiled earlier; tests testInferredSharedPreparationReusesCommonModuleBetweenRules / ResolvesCommonClosureOnce). It trades parallelism for reuse and makes preparation time grow linearly with rule count ? stage size.

  • Candidate fixes (decision pending with the owner): (1) make the per-child snapshot O(1) ? hard-link/reflink snapshot (cp -al of immutable cache entries) or have children read the stage read-only with a private overlay ? removes the ~1.5?3.4 min gaps; (2) replace the linear chain with a two-level plan: the common module rule(s) first, then the remaining rules in parallel (up to the configured parallelism) off that one snapshot. Rejected: raising SHARED_PREPARATION_DEADLINE_MS (a timeout increase masking the cost).## UPDATE 2026-09-27 09:50 UTC ? url://buildtest/ DEPLOYED (owner-approved)

  • Deployed BuildTestServerService main f0fb90a9 (includes PR 372 = coordinator 0.0.69262241 with BTE 1082 + 1090, and PR 371 "Detach droplet RPC values from sandbox generations" merged 05:40 by another session). Built locally from a fresh fetch of origin/main (clean tree); jar SHA-256 175d4d15be993bb9ed1ac1f698405ca6a137213a53fa6ce0d420a7f20176bbc2, 154,810,528 bytes. Uploaded 09:31?09:32 UTC via CN CLI 0.0.16 upload-jar --route 'url:buildtest:' (the bare key buildtest is rejected: "Route not found"); new process banner 09:33:23; in-flight runs resumed 09:35:27; 600+ requests served, shards completing, no droplet-cleanup/allocation failures in the new process's logs.

  • Deployed but misleadingly named: the CLI kept the route's existing filename, so the live image path is still /root/ContainerNursery-uploads/jars/buildtest-server-hotfix-embedded-0.0.68290276-20260924.jar ? its CONTENT is BTSS main f0fb90a9 (verify by SHA-256 above). Next deploy: pass --filename buildtest-server-<sha>-<date>.jar.

  • 585's required check re-requested at ~09:47 on head 3aabaf6b against the new coordinator. Remaining chain: 585 green ? owner approval to merge (session now in Opus mode: merges need explicit approval) ? publish protocol 0.0.534 ? DMSS pin bump ? redeploy provider routes ? production acceptance.RE-VERIFY: Check https://github.com/CodexCoder21Organization/UrlProtocol/pull/585 and live buildtest run 09c9015f before acting. This is a write-time snapshot.

The coordinator fix is deployed in the running url:buildtest: process. The old jar filename is misleading; see the byte-for-byte embedded-class comparison in the 07:49 W67 update below. No production deploy was done by W67. The old owner-approval blocker below is no longer current.

The acceptance check for https://github.com/CodexCoder21Organization/UrlProtocol/pull/585 was re-requested at 07:41:46 UTC. At 08:02:37 UTC, its head was 3aabaf6b6f817bac31573c71573445ff9e0eb01b on current main 26fc1b909552b325c8b24c45575bf3d5c548f799; bld-all-tests and bld-build were SUCCESS, while kotlin.build (remote) and kotlin.build (kompile-remote-build) were IN_PROGRESS. Remote run 09c9015f was PENDING in the executor queue after 20 minutes; a 07:55 read-only coordinator log placed it at queue position 19 of 25, requesting 10 droplets. The coordinator is serving other runs and its health projection feed is connected. Published foundation.url:protocol:0.0.534 still returned HTTP 404. Do not interpret queue wait as a failing test or blindly rerequest it.

Repo Branch Remote SHA PR Contents State
CodexCoder21Organization/PlanRepository https://github.com/CodexCoder21Organization/PlanRepository/tree/wip/hf-2026-09-23-coordinator-W67 c06c53456280bfef7588bff07855edef922c46bf none (findings artifact) https://github.com/CodexCoder21Organization/PlanRepository/blob/wip/hf-2026-09-23-coordinator-W67/handoffs/artifacts/2026-09-27-w67-coordinator-shared-preparation/findings.md Pushed and remote SHA verified.

Next: watch https://github.com/CodexCoder21Organization/UrlProtocol/pull/585 with build-watchman without --to-merged until both required checks finish. Inspect run 09c9015f for a multi-shard shared preparation that completes under the owned 20-minute deadline. If it fails, diagnose the actual run and reproduce locally before changing code; do not blind-rerun. If it passes, the orchestrator alone reviews and merges the PR. Only after it merges, publish foundation.url:protocol:0.0.534 from merged main, update downstream pins on the current DummyModelServiceServer main, test and PR them, and obtain explicit user permission before any downstream production deploy. DummyModelServiceServer https://github.com/CodexCoder21Organization/DummyModelServiceServer/pull/1 is already merged, despite the stale statement below.

Update 2026-09-27 07:49 UTC (W67; supersedes the deploy blocker below)

RE-VERIFY: Inspect the live url:buildtest: ContainerNursery route and process, the UrlProtocol pull request checks, and kotlin.directory before acting; this is a write-time snapshot.

The claimed owner-approval/deploy blocker is stale. The live route still names buildtest-server-hotfix-embedded-0.0.68290276-20260924.jar, but that file was modified at 06:11:06 UTC and its Java process started at 06:11:38 UTC. A read-only comparison of all 1,674 buildtest/embedded/*.class entries in that live jar against the published buildtest.embedded:buildtest-embedded:0.0.69262241 jar gives the same aggregate SHA-256, adc1e0dae14a437ae5244663ad208955f2d959138a3b507b955275d3a655cc95. The live health endpoint reports projectionFeedConnected=true. W67 made no production changes.

The merged coordinator fix is on BuildTestEmbedded main (https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1082 and https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1090); BuildTestServerService main pins 0.0.69262241 (https://github.com/CodexCoder21Organization/BuildTestServerService/pull/372). UrlProtocol https://github.com/CodexCoder21Organization/UrlProtocol/pull/585 is open at 3aabaf6b6f817bac31573c71573445ff9e0eb01b, based on current main and pinning unpublished 0.0.534. Its required remote check was re-requested at 07:41:46 UTC as acceptance on the newly running coordinator; buildtest run 09c9015f was queued at 07:47 UTC. Watch it with build-watchman without --to-merged. DummyModelServiceServer https://github.com/CodexCoder21Organization/DummyModelServiceServer/pull/1 merged at 06:35 UTC; the older text below that says it is open is stale. Do not publish UrlProtocol 0.0.534 before that PR merges, and do not deploy downstream services without the user's explicit instruction.

Get BuildTestEmbedded PR 1082 (coordinator shared-preparation fix) approved by the owner, merged and deployed

UPDATE 2026-09-27 05:10 UTC (re-verified; supersedes conflicting lines below)

RE-VERIFY before acting: gh pr view <n> --repo CodexCoder21Organization/<repo> --json state,mergeStateStatus,headRefOid,statusCheckRollup; curl -s https://buildtest.kotlin.build/api/health; published coordinates on https://kotlin.directory; ContainerNursery CLI 0.0.16 for routes.

Blocked on exactly one owner decision: approve deploying url://buildtest/ (BuildTestServerService, ContainerNursery route buildtest, host 198.199.106.165) from BuildTestServerService main 4ecbe667 (https://github.com/CodexCoder21Organization/BuildTestServerService/pull/372 merged 05:01 UTC; pin buildtest.embedded:buildtest-embedded:0.0.69262241 = BuildTestEmbedded main 5ef4f9d3 with PR 1082 + 1090). Deploy jar built from that main: SHA-256 18441febc234bef8aadf2687e60c83f7adb9c276dd0426463fc1882a0b289012 (rebuild with scripts/build.bash --local buildtest.server.buildFatJar <out>.jar; --remote fails in this repo). Readiness (read-only, 2026-09-27 00:13 UTC): READY ? live route runs SERIAL stage mode with no profile path, so the coordinator-local profile file /etc/buildtest/runner-preparation-memory.json (absent on the host, no bind mount) is NOT read; it becomes a precondition only if PIPELINE mode is enabled. /root/buildtest-data (runs, control quota store, journals) present and mounted. Deploy sequence: coursier launch containernurserycli:container-nursery-cli:0.0.16 -r https://kotlin.directory -- --url https://api.nursery.wasmserver.com upload-jar --file <jar> --route buildtest (upload restarts the route); then container-logs --route-key url:buildtest: (trailing colon required), curl -sS https://buildtest.kotlin.build/api/health (expect 200, projection feed connected), and confirm in-flight runs resume. Do not deploy without the owner's word.

State (05:06 UTC):

  • MERGED this session: BuildTestEmbedded https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1090 (2026-09-26 21:59), https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1082 (02:59; final head 7c40eff5 after three review rounds: rebase over #1102/#1104, retained-profile installation under the owned deadline, generation-owned profile publication/rollback + concurrent-generation guard + real service-restart recovery); BuildTestServerService https://github.com/CodexCoder21Organization/BuildTestServerService/pull/370 (01:23) and /pull/372 (05:01).
  • Published: buildtest-embedded 0.0.69241730 (jar SHA-256 7fe505ef84299c766fbfe88ff9eedb0e9c12eb6e5d006c4e6a06ab5397c87ca9) and 0.0.69262241 (byte-verified; see artifacts rU-findings.md).
  • https://github.com/CodexCoder21Organization/UrlProtocol/pull/585 ? OPEN, head 3aabaf6b: coordinate moved 0.0.530?0.0.534 (0.0.530?0.0.533 claimed by other builds; 0.0.534 still 404); flake testRelayKeepaliveCancellationWarningCarriesTheFailure root-caused (tests' Clock instrumentation published the armed pong deadline before its schedule) and fixed in a shared test-support clock (test-support/keepalive-clock/PongDeadlineObservingClock.kt), no real-time waits, discriminating reproducer, production proven race-free by design (a tick may see an in-flight ping before its deadline is armed ? deliberate suppression of overlapping pings). bld-all-tests + bld-build green; every delegate review and the orchestrator's final review clean. Required kotlin.build (remote) red only on the live coordinator's allocation defect (runs 698b4013, 40b70405, d3a2ff44, c9754f1e, d89a84bc ? all "Could not verify droplet cleanup before requeueing ? AmbiguousRpcRequestException / Provisioning deadline exceeded"). After the deploy: gh api --method POST repos/CodexCoder21Organization/UrlProtocol/check-suites/<kotlin-build-ci-test suite id for 3aabaf6b>/rerequest, then enqueue via GraphQL enqueuePullRequest.
  • https://github.com/CodexCoder21Organization/DummyModelServiceServer/pull/1 ? OPEN, head 00c38828: ANOTHER SESSION is actively adding async-generation work to it (commits "Reproduce blocking image generation requests", "Run dummy generations asynchronously", 00:36?01:05 UTC); its required check is green. Do not fight it: after 0.0.534 is published, bump the foundation.url:protocol pin on top of whatever they land (clear aibuildcaches + coursier bldbinary caches; prove the classpath carries 0.0.534), run its tests, land, rebuild the service jar, redeploy both ContainerNursery routes (dummy-text-model, dummy-image-model, facade url; CN CLI 0.0.16 works, 0.0.19 crashes), then production acceptance on https://photo-generation-manager-wui.wasmserver.com/ (both models listed; text generation returns a random alphanumeric string; image generation returns an image containing one; first screen clean ? no prompts/errors).
  • Separate handoff filed for two pre-existing coordinator flakes found during 1082's gate: url://handoff/handoffs/hf-2026-09-27-root-cause-and-fix-two-pre-existing-buildtestembedded-coordinator-flakes-startup-snapshotrun-lock-order-under-held-journal-replay-and-whole-run-requeue-waiting-on-already-completed-droplet-deletion (investigation tests on https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/1082-fullsuite-flake-investigation-2026-09-27, 9cd7aae0).

Chain to completion (in order): owner approves deploy ? deploy + verify url://buildtest/ ? rerequest 585's required check ? enqueue 585 ? publish foundation.url:protocol:0.0.534 from merged main (publish-maven-artifact skill; SHA-256 byte-verify; never overwrite 0.0.528?0.0.533) ? DummyModelServiceServer pin bump (on top of the sibling session's landed work) ? build + redeploy both routes ? production acceptance ? complete this handoff.

Artifacts (all pushed, verified by git ls-remote): https://github.com/CodexCoder21Organization/PlanRepository/tree/wip/dummy-model-providers-handoff-2026-09-27 (3a5693fb) ? every delegate brief (p*-.md), findings (r-findings.md), final message (r*-final.md), status report, the deploy-readiness report (rH-findings.md with the evidence table), the 585 timeout diagnosis (rJ-findings.md), and the review reports. Earlier campaign artifacts: https://github.com/CodexCoder21Organization/PlanRepository/tree/wip/dummy-model-providers-handoff-2026-09-23.

Deployed or published but not merged: none ? both published coordinator coordinates are builds of merged BuildTestEmbedded main commits (3ce65cb6, 5ef4f9d3); no ContainerNursery route was changed this session (verified via the CLI route listing).

Deliberately not pushed: the staged deploy jar (build output; rebuild from main) and reviewer scratch checkouts under the session scratchpad (only clones of pushed heads plus review-branch tests that ARE pushed: wip/review-1082-6a2761eb, wip/review-1082-fix-4092ab8f, wip/review-1082-7c40eff5). Written 2026-09-24 21:00 UTC. RE-VERIFY before acting: gh pr view 1082 --repo CodexCoder21Organization/BuildTestEmbedded --json state,mergeStateStatus,headRefOid,statusCheckRollup.

UPDATE 2026-09-26 21:20 UTC (re-verified; supersedes conflicting lines below)

  • Protocol coordinate collision again: foundation.url:protocol 0.0.530, 0.0.531, 0.0.532 and 0.0.533 were all published by other sessions by 2026-09-24 10:54 UTC (maven-metadata lastUpdated 20260924105432) while main's build.kts still declares 0.0.527. Verified by jar listing: none of them contains PR 585's work (no RelayService keepalive-on-Clock classes, no RelayKeepaliveCancellationFailureWarningEffect / RelayKeepaliveSendFailureAfterSettlementWarningEffect; the only "RelayKeepalive" hit is the pre-existing RelayProtocol$RelayKeepalive message class). PR 585 (head 4f823b34, build.kts = 0.0.530) must bump its coordinate to the next free version ? 0.0.534 is 404 as of this update ? plus the changelog line; that head change needs a narrow re-review and fresh CI. NEVER overwrite 0.0.530?0.0.533. The DummyModelServiceServer pin bump then targets 0.0.534 (or whatever is free at the time), not 0.0.530.
  • BuildTestEmbedded PR 1082 is now DIRTY (merge conflicts): main moved with #1104 "Keep the first child's build-rule result index entry when merging shared-cache preparation", #1103, #1102 "?key the module cache by its full producer identity", #1101, #1096 ? #1104 and #1102 touch the same shared-preparation / module-cache area. A rebase with real conflict resolution is required, then a re-review of the resolution and fresh CI, before the owner approval can turn into an enqueue. Owner approval ("approve 1082") is still outstanding.
  • PR 1090: still OPEN, CLEAN, CI green on b7abc382; owner approval ("approve write-variant") still outstanding.
  • PR 585: still OPEN at 4f823b34; GitHub checks green; both kotlin.build checks still red from the coordinator regression (no rerun since 2026-09-24).
  • DummyModelServiceServer PR 1: still OPEN, CLEAN at 44458689.
  • Revised chain: owner approvals ? rebase 1082 onto main (resolve against #1102/#1104) ? re-review + CI ? enqueue 1082 and 1090 ? one build-service deploy ? bump 585 to the next free coordinate (0.0.534) ? narrow re-review + CI ? rerun required check ? enqueue 585 ? publish byte-verified ? DMSS pin bump ? redeploy both routes ? production acceptance.

Mission

Followers must not abandon shard 0's shared preparation on a fixed five-minute clock, preparation must not repeat the common module compile in four isolated children racing on a shared coursier workspace file, and preparation failures must be classified as infrastructure. This blocked UrlProtocol PR 585's required check five times with every test passing.

State

  • https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1082, branch fix/r218-shared-preparation-coordination. Reviewed head 08a92e01 (five delegate review rounds clean ? adversarial and test-comprehensiveness ? plus the orchestrator's final read; full local suite 2627/2627 on an earlier head; branch CI green). Current head d1406f2e: two commits pushed 11:19?11:20 UTC by another session ("Bump buildtest-embedded coordinate for the shared-preparation coordination change", "Drop delegate working notes now that main ignores investigations/"); CI green on it; the delta has not been reviewed by this session ? read it before enqueueing.
  • Blocked on the owner: the PR changes 17 existing tests' expectations and introduces SHARED_PREPARATION_DEADLINE_MS = 20 minutes as a NEW constant (an untimed follower wait bounded by it replaces the 5-minute grace), plus stop-command bounds and four policy changes. The exact owner-approval table is in the PR body ("Time-bound changes" and "Existing tests whose expectations changed"). The owner has been asked to reply "approve 1082".
  • Rollout after merge: build the embedded jar, bump the BuildTestServerService pin, deploy the coordinator once (the owner pre-approved one build-service deploy after PR 993, which merged 2026-09-24 01:17 UTC; this session held it so one restart covers 993 + 1086 + 1088 + 1093 + 1094 + 1082). Then re-request UrlProtocol 585's required check.
  • Related merged fixes from the same incident (all on main): 1086 (ambiguous-RPC classification), 1088 (404-after-create "not visible yet", nine rounds), 1093 (sibling-stop interrupt held during run-snapshot writes), 1094 (watchdog re-entry bounded). Also open: 1090 (mid-write ambiguous variant; owner approval of a test expectation).
  • Follow-ups recorded in the PR body: sharded resume after a restart mid-preparation re-runs every shard without the shared cache (pre-existing); exit-137/crash rule exits reported as code failures (as on main).

Next steps

  1. Owner approval ? read the d1406f2e delta ? rebase if BEHIND ? enqueue via GraphQL (build-watchman wedges on the bypassed zero-run kotlin-build-ci-test suites here) ? sample mergeQueueEntry by GraphQL.
  2. Deploy the coordinator once from main; re-request 585's required suite; complete this handoff.

Artifacts

Ledgers, every delegate findings file (o2 implementation rounds 1?5; o5/o6 reviews), briefs and CI excerpts: https://github.com/CodexCoder21Organization/PlanRepository/tree/wip/dummy-model-providers-handoff-2026-09-23/handoffs/artifacts/ (2026-09-23 and 2026-09-24 directories). The earlier design: investigations/r218/design.md existed on the branch until d1406f2e removed the notes (main ignores investigations/); the design text is preserved in the artifacts findings (r218-design.md).