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C5 course-changing snapshot — 2026-10-08 23:29 UTC

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id: hf-2026-10-08-finish-the-decoded-journal-tail-bound-and-its-validation-gates url: url://handoff/handoffs/hf-2026-10-08-finish-the-decoded-journal-tail-bound-and-its-validation-gates title: Resolve first-attempt failures in the decoded-tail draft PR summary: DraftPR1343 has green final CI but3 retry-only passes:2 new decoded-tail tests and1 existing startup-load test. Contracts217/217 plus affected pair2/2 first-pass. Causes unresolved; full evidence and unchanged product checkpointed. No merge/enqueue. created: 2026-10-08T16:08:45.218Z completed: null dependencies:

C5 course-changing snapshot — 2026-10-08 23:29 UTC

RE-VERIFY: Check current PR state/head, remote branch heads, main hunks and attempt-history XML. This is a write-time snapshot. Earlier active/pending statements below are historical.

Remaining work: resolve three first-attempt suite failures before treating this PR as accepted. https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1343 is OPEN/DRAFT at93be2f64db508e9bcef42e30844d3d2e69356eea, unmerged. All five final CI checks are green, and plain build-watchman exited0/GREEN, but that final verdict hides three retry-only passes. No enqueue/merge/deploy is authorized, and no person decision is pending.

Shard First passes/executed First failures Retry-only Extra attempts Job
1 971/971 0 0 0 job
2 972/974 2 2 2 job
3 973/973 0 0 0 job
4 978/979 1 1 1 job

Total3894/3897 first passes, three retry-only passes, three extra attempts, zero final failures. Retry-only passes get no credit. Aggregate check bld-build passed; the workflow is terminal success. No rerun started.

Fresh repaired contracts are complete217/217 plus the affected cache-failure/compaction pair2/2, all219 first attempts, zero retries. Inherited scenario/heap/mutation credit remains accurately labelled in the gate ledger below; no own product edit in C5.

Observed failures and evidence limits

  • Own testProjectionDecodedTailBuildRuleHistory: first attempt exceeded its unchanged240-second limit at batchReady.await, test line138. Main waits for the runner batch; one carrier had98.279 CPU seconds in235.34 wall seconds. Maintenance was intentionally held by the fixture and journal writer was idle. The native dump does not expose the virtual runner’s application frames, so ingestion cause is not established.
  • Own testProjectionDecodedTailHistoryFitsDefaultHeap: first attempt exceeded240 seconds during public feed replay. Native main stack is JSONTokener.next -> JSONObject -> PagedJournalGeneration.readRecord -> JournalRecordView.get -> ProjectionChangeJournal.forEachEligibleRecord/pageInternal -> getProjectionChanges -> test line161. A self-dump catches the eager positive-assertion message serializing page.toString at line164. Main had52.752 CPU seconds in240.92 wall seconds; a G1 concurrent worker had11.281 CPU seconds. No OutOfMemoryError was reported. This proves a replay/work deadline failure, not a memory-cap breach.
  • Existing projectionStartupCompactionUnderSustainedProductionScaleLoad: all24 writers finished fixed32-write bursts but expired their30-second feed-confirmation barriers; startup then returned after the writers stopped. Root cause remains unknown; no main-control or infrastructure-only classification is claimed.

Potential work amplification, not a proven cause: forEachEligibleRecord calls firstRecordIndexAfter twice per page; each binary probe accesses records[middle].getLong(sequence), which reparses the complete row when it is outside the decoded window. Quantify payload decode work, and compare with required returned rows, before choosing an index/seek change. Also quantify eager assertion-message work without weakening any assertion. Do not pick this easy local optimization while the runner-ingestion mechanism remains unexplained. Exact full-selector versus targeted bootstrap/JVM policy should be captured; both timed-out dumps show emulated-client/C1-only threads, but that does not prove an artifact version. The shard2 job log confirms the launcher downloaded0.0.112; no0.0.121 attribution is established.

Next experiments: capture actual virtual runner stacks during a reliably-failing public workload, measure per-page decode/serialization and runner canonical-source work, then force the diagnosed condition deterministically. Keep timeouts, payloads, counts and public assertions unchanged. No CPU spinners, mocks, reflection or guessed fix. If incoming main hunks intersect own journal/service paths, rerun only the affected pair once; do not restart20-run gates. Keep the PR draft until the failure class is understood and repaired; the PR’s four shards remain the full-suite gate.

Current durable refs

Repo Branch Verified remote head PR State
BuildTestEmbedded wip/sol-coordfixC5 2324f7f9d https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1343 Product plus curated ledger/findings/complete exception stacks; same product files as PR
BuildTestEmbedded fix/decoded-journal-tail-window 93be2f64db508e9bcef42e30844d3d2e69356eea https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1343 Clean14-file product diff, draft, final CI green but first-attempt acceptance unresolved
BuildTestEmbedded wip/sol-coordfixC5-tested-contracts 8ca20529ea4562792b7d6443ab5284112435b69e no PR Exact219-case executed snapshot, all first passes

Current PR base is4a451989981e3ae6120b4a3dd2f59728559f6bef. Main was verified remotely atc91873ddab64f3e368a11d61750a57d40659eed9 at23:26; it has not been integrated into this PR. Fetch/rebase and classify incoming hunks before any new build or PR source push. C5 never changed the actual0.0.112 pins. Check PR OPEN state before updating its branch.

Curated findings, gate ledger, full exception stacks and the workflow artifacts preserve evidence. Complete console/thread dumps are in the XML artifacts, not committed build output. No source fix was guessed; no test was loosened.

Handoff transport friction: the23:09 update failed before resolving API bytecode, direct stream closed while reading0 of4 bytes; relay attempts reported7 of8 bounded dial tasks in flight. One90-second retry ended without acknowledgement. Earlier updates and22:58 report succeeded. The auto-merging challenge recorder was not used because this brief forbids merges; the evidence is in findings. Current snapshot will be uploaded again, and remains on the WIP branch if service upload fails.

No deployment/publication: all C5 actions were GitHub/source/test/handoff operations. All four targeted helpers and the plain watcher exited; no CI run remains active. Own clone/worktree cleanup is still pending at this snapshot. C5 cleanup/report boundary23:39 UTC, hard stop23:44 UTC.

Historical snapshots and earlier branch evidence

C5 active snapshot — 2026-10-08 23:09 UTC

RE-VERIFY: This is a write-time snapshot. Read the current PR, remote refs and workflow XML before acting. C5/common-flake 18:05 rules supersede the older resume directions retained below.

Remaining: watch the open PR’s own four bld shards with plain build-watchman --all-checks, inspect their first-attempt XML, then report and clean up. The repaired217 contract gate is complete. No merge, enqueue, deployment or publication is authorized. Hard cleanup starts 23:39 UTC; this lane cannot run past 23:44 UTC. No person decision pending.

Repo Branch Remote head SHA PR Contents/state
BuildTestEmbedded wip/sol-coordfixC5 3d1292a45a7741395b8d558bfa2cb7e5f156e969 https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1343 Rebased inherited repaired product, findings, review and partition manifest; contract gate217/217 plus2/2 pair, zero retries
BuildTestEmbedded fix/decoded-journal-tail-window 93be2f64db508e9bcef42e30844d3d2e69356eea https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1343 Clean product-only branch, 14 files; implementation/new test files byte-identical to tested checkpoint8ca20529e; clean rebase onto4a451989, product files byte-identical between WIP and PR
BuildTestEmbedded wip/sol-coordfixC5-tested-contracts 8ca20529ea4562792b7d6443ab5284112435b69e no PR Exact pre-rebase snapshot used by all four C5 contracts; all219 first passes

Main d9d410b3 adds service startup/close interruption handling, no journal-file changes. Fresh contracts test 8ca20529ea4562792b7d6443ab5284112435b69e; part 1 includes the affected cache-failure/compaction pair once. Gates retained: all six new scenarios each20/20 before compaction repair and each1/1 on repaired source; unchanged heap test5/5 repaired first attempts versus6/6 pre-repair failures (Fisher0.0021645), zero repaired retries. No own product edit in C5. The clean final rebase to main4a451989981e3ae6120b4a3dd2f59728559f6bef adds unrelated restart/state-write tests and backward-clock worker scheduling; no journal/service/new-test/build hunks. Gate credit retained. Repaired217 contracts now217/217 first passes, plus fresh pair2/2, zero extra attempts.

Completed partition runs: 43 contracts plus pair, 58, 58, 58. Expected XML45,58,58,58. Strict XML confirms all219 first passes with no missing, extra or duplicated selected file, and zero retries. Helpers exited normally and removed temporary branches. Four command budgets2100seconds use measured durations; no test bounds changed. First attempts, missing selection and retry-only results must be checked from XML. The fresh clone and clean PR worktree are owned by C5 and will be deleted after durable checkpoint/report.

Production/source context: retain the established allocation mechanism and fixture refutation below. Immutable production heap findings are here. Sibling work is lock scope, baseline rows on disk, and now durable checkpoint/lazy reset recovery. These are context links, not this lane's merge permission.

Nothing deployed or published in C5: all commands were clone/read/source assembly/commit/push/test workflow/handoff operations. No production command was issued. Review and findings are durable on the checkpoint branch. Source/test verification found no new concrete issue; inherited independent review findings are addressed. README still recommends CPU spinners in an older section; the binding brief prohibits them, and none is used.

PR https://github.com/CodexCoder21Organization/BuildTestEmbedded/pull/1343 is OPEN, unmerged, head93be2f64db508e9bcef42e30844d3d2e69356eea. Full-suite workflow https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37854246369 is IN_PROGRESS; no green verdict yet. Plain build-watchman0.0.21 is tracked with a3800-second command deadline. The watcher observes the legacy kotlin-build-ci-test app’s zero-run suites on both head/base as expected dormant-app state and does not rerequest them. Shard3 is SUCCESS with973/973 first passes and zero retries; job. The other three bld shards remain IN_PROGRESS at23:09 UTC. No whole-suite verdict yet. Read the committed C5 gate ledger, findings and review.

Historical C4 snapshot and branch evidence

The following record is retained to preserve all earlier branches and evidence. Its pending-run statements and resume order are historical; current remaining work is described above.

FINAL continuation snapshot — 2026-10-08 21:44 UTC

Stopped at the brief's 75-minute boundary. Local helpers stopped and the unfinished 217-contract run terminal cancelled; no PR opened, no merge/enqueue/deploy. No person decision pending; claim is released at shutdown.

2026-10-08 21:44 UTC — FINAL: stopped at the brief's 75-minute boundary; task unfinished. The request was to complete bounded decoded journal-tail gates, open a PR and watch its suite without merging. No user decision is pending.

The fresh contract run found a reproducible compaction heap regression. Eviction caused eager delta capture to reparse and retain the complete historical payload set; JVM allocation reports confirmed that path. The repaired code uses leased suffixes, row-coordinate indexes and a separate disk stage, with close-all cleanup on every operation exit.

Gate Verified result
Six new scenarios before the repair Each 20/20 first attempts
Six new scenarios on repaired source Each 1/1 first attempt, zero retries
Affected startup/compaction pair on repaired source 2/2 first attempts
Unchanged 128 MiB heap reproducer Before repair 6/6 failures; after repair 5/5 first passes, zero retries
Original 217 contracts 216 first passes, one heap failure (3/3 attempts); no retry-only passes
Repaired 217 contracts Cancelled at boundary; completed/cancelled verified; no XML artifact available
PR / PR CI No PR opened; suite not started

Product source is 08433a04d on https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC4; later commits preserve findings, gate accounting, allocation evidence and the updated PR draft. Diagnostics remain isolated at https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC4-allocation-diagnostic. No merge, enqueue, deployment or artifact publication occurred. All local helpers stopped; final remote checkpoint verified; owned checkouts deleted during shutdown.

Delegated work at a glance: no subagents. Landing sweep: no new work dispatched during shutdown; the remaining contract run is https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846631323. Remaining work is repaired-head contract acceptance, affected repetition credit, then a clean product-only PR and its four-shard suite.

Handoff: https://www.handoff.wasmserver.com/handoffs/hf-2026-10-08-finish-the-decoded-journal-tail-bound-and-its-validation-gates . The report is mirrored and the claim released at shutdown.

Lessons: first-attempt XML determines gate credit; compare the exact main control before assigning cause; a cache bound must include the consumers that materialize historical rows.

Earlier live snapshot and preserved branch history

Verify streamed compaction repair and finish decoded-tail PR

LIVE SNAPSHOT 2026-10-08 21:42 UTC. Claimed by sol-coordfixC4; no person decision pending. The brief requires checkpoint/report/stop at 21:45 UTC. No PR, merge, enqueue, deployment or publication.

Current checkpoint: https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC4 at 8b06ddd1ed48b4b17a17dda014a384df4c980d94. Product repaired source is 08433a04d (checkpoint adds evidence only). Allocation diagnostic: https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC4-allocation-diagnostic at e7ce870b6. Do not adopt diagnostic launcher flags into the product.

The corrected admission fixture is settled as (a), a cursor-confirmation fixture error. All six original new scenarios reached 20/20 first attempts on the pre-repair head, and the current-base affected pair passed 2/2. See checkpoint handoff-artifacts/coordfixC4/gates.md for every continuation run.

The fresh 217-contract run https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37841778612 ended 216 first passes and one first failure, with two extra attempts and zero retry-only passes. projectionCompactionLargeDeltaStreamsUnderTightHeap failed 3/3. The exact test passed on current main in https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37841850503. Targeted feature run https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37844368087 failed 3/3. Full traces: checkpoint handoff-artifacts/coordfixC4/contract-failure.md. The prior close/reset failure did not recur.

Diagnostic https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37844880384 captured three JVM reports naming PagedJournalGeneration.readRecord -> JournalRecordView.get -> ArrayList constructor -> ProjectionChangeJournal.recordsAfterSequenceLocked -> compaction attemptPublication. The eager suffix capture reparses all evicted payloads and holds another full decoded set beside authoritative run state.

Proposed repair: leased immutable suffixes; row coordinates in changed-authority and expired-tail indexes; separate disk overlay before truncating its source stage; close all owned captures on all exits. Existing public heap test unchanged. Invariants, allocation stacks and independent review notes are in checkpoint handoff-artifacts/coordfixC4. First build failed with inaccessible private attemptCleanup; 08433a04d corrects that compile error. Original 20/20 credit is pre-repair; repaired-head credit must be verified explicitly.

Heap runs https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846628798 and https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846912649 each passed the unchanged reproducer on its first attempt, no retries. Additional proof repetitions, the six new scenarios and the 217 contracts remain pending.

Original validation URLs (all tracked/bounded; cancel at stop if not terminal): https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846628798 (heap); https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846631323 (217 contracts); https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846633358 (six new plus heap); https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846912649 (heap proof). Their source snapshots differ only in evidence after 08433a04d.

Resume with fresh clone in scratchpad/workspace, read README and linked docs, checkout wip/sol-coordfixC4 and fetch/rebase main, classify incoming hunks under amended rebase-credit rule. Read findings and repaired-run XML first-attempt histories before taking credit. Finish repair validation and affected repetitions; only after gates are green create a clean product-only PR with the draft's why-first provenance plus this regression and repair; watch all PR checks with plain build-watchman --pr N --all-checks. Never --to-merged; no merge/enqueue. Do not weaken tests or raise their heap/time/count settings.

Previous checkpoint history and branch links

Finish decoded journal tail verification and open its PR

FINAL SNAPSHOT2026-10-08 20:09UTC. Execution stopped at the assigned time boundary, no person decision pending. All work pushed to https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC3 at 350b72a61a20e2c8b3391d272c56ee8e44dfd228. No PR, merge, enqueue, deployment or publication. Owned helpers stopped and both remaining Actions workflows terminal cancelled. Own checkout is being deleted immediately after this update.

Admission mechanism settled(a): one-row observations registered reader18, larger replay skipped confirmation; measured baseline4098 versus protectedFirst19 correctly rejects4098<=18, despite4159durable suffix rows and decoded256. Following the exact handed-out cursor allows publication. Payload diagnostic then found only root sourceFingerprint changed from earlier source version to final canonical-file hash; nested payload identical. Final baseline digest excludes that mutable metadata, while suffix digest preserves it. All exact baseline/suffix counts, membership, uniqueness, order and end-position checks remain. Independent reviews complete. Evidence in out/coordfixC3b-admission-evidence.md and out/coordfixC3b-payload-evidence.md on the checkpoint branch.

Gates0.0.112: five scenarios20/20first attempt; final compaction11/20first attempt, zero retries. Existing217contract records:215first passes,2first failures,1retry-only success,3extra attempts. Gate not green. Complete first traces: https://github.com/CodexCoder21Organization/BuildTestEmbedded/blob/wip/sol-coordfixC3/out/coordfixC3b-contract-failures.md . Reproduce and classify those failures before acceptance; no cause was inferred at stop. Contract run https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37833388929 cancelled at boundary. Newest-base pair https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37836376884 cancelled without XML. Full suite NOT RUN; PR NONE.

Latest base https://github.com/CodexCoder21Organization/BuildTestEmbedded/commit/a625fa1e11bb746c16bd0888ba5ef2acf2437ec8 . Rebase conflict in appended build.kts rules resolved by keeping both restart-crash and decoded-tail-crash child functions. Incoming service127lines need hunk classification and affected startup/compaction regression pair ONCE per amended credit rule; retain previous gate credit, do not blindly restart20. Strong11 never dispatched due working conflicts; strong12 used complete pre-rebase committed7fd8e564source (feature/test identical) and its first XML pass is valid. Future invocations must stop on failed rebase before launching tests.

Resume: fresh clone this branch, read findings/ledger/reviews and linked docs, inspect incoming service hunks, reproduce/classify contract first failures, verify affected pair on current base, finish compaction20/20, then existing-contract green acceptance and four full-suite shards, then why-first PR. No merge/enqueue/deploy. Fresh suite manifests required: original3825preparation historical and temporary manifest reuse failed. Materialize fresh pruned shard trees then --test . as bld-build.yml does. Both inherited mutation controls and adjacent startup cache-write writer fix are retained. Diagnostic8192-window branch exists at https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC3-no-eviction-control , NOT RUN and never acceptance. No code is deployed or published. No person blocker; release claim after final RUNNING report.

Previous branch and evidence ledger (retained in full)

Continue decoded journal-tail validation and open its PR

RE-VERIFY: snapshot at17:42 UTC on2026-10-08; all owned tests/helpers stopped. Run git ls-remote origin refs/heads/wip/sol-coordfixC2 and gh pr list --repo CodexCoder21Organization/BuildTestEmbedded --head wip/sol-coordfixC2 --state all --json url,state; verify every Actions URL below. This update supersedes the earlier lane snapshot. The explicit coordfixC2 stop is17:43 UTC; this session is stopping with incomplete gates and releasing its claim. No user answer is pending.

Current state and why the work exists

The assigned brief is to finish the decoded journal-tail bound, prove C1-C3 and its mutations, get each new test 20/20 first attempt on kompile-cli 0.0.112, run existing contracts once then the full suite as four exact GitHub shards, and only then open a PR. Never merge/enqueue/deploy. The production banner was stale about three hours, full-GC occupied 48% of wall time, and the decoded journal tail retained approximately957 MiB. Investigation: https://github.com/CodexCoder21Organization/BuildTestServerService/blob/2bd66a88ce37be9a1f061eaedc608c7b5d29cb3e/investigations/coord3/findings.md . This is one of three fixes; sibling compaction lock scope and snapshot-cache changes are excluded.

Draft product uses a positive projectionJournalDecodedTailMaxRecords default256, evicts decoded rows into a leased disposable indexed generation derived from the forced journal, and re-reads old cursor rows from that generation. The durable journal and authoritative source remain recovery inputs. Snapshots capture a fixed disk prefix and a bounded copied suffix; stage sealing decodes only the final window. Retention, cursor format, classification and compaction are unchanged. Public count observations occur outside journal locks. README documents sizing and the setting. Independent test and product passes are recorded below; no static product blocker remains.

The review discovered a real additional bug: post-durable records.add could throw during a cache write after a direct startup append, bypassing the live writer's outer catch and leaving appendWriterActive set forever. A public startup test failed1/1 before the fix. The journal now wraps its publication phase and invokes its existing unavailable/repair transition, clears append ownership and signals waiters. Source/durable rows remain intact. Fixed test has six historical first-attempt passes. Red: https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37810471818 .

Both required mutations are red and the product was restored byte-for-byte: removed bound gave lease/runner assertion failures and the distinct-payload child exceeded128 MiB (0/3); skipped evicted-row reread gave old-cursor sequence failure0/1 at https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37810198295 .

Six historical six-scenario invocations give five unchanged scenarios6/6 each and original build-rule C3 fixture5/6. Five invocations were all-six green; these are not20/20. The preserved first C3 failure is https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37811557495 . Its complete old-cursor history had already passed; main then waited for publication while maintenance was idle. Source diagnosis: prepareCompaction intentionally refuses when canonical baseline plus overlay cannot fit before protectedFirstSequence-1.4096 unique canonical rules leave insufficient earlier positions beside32 protected rows. The fixture wrongly assumed publication was always eligible. No product cache bug is supported by this failure.

Corrected fixture adds64 genuine ManualClock-advanced public lease versions, drains each through latestProjectionCursor, confirms final endCursor consumption, and restores the original beforeProjectionCompactionPreparation hold so concurrent delta folding remains covered. A guarded maintenance-completion assertion diagnoses refusal promptly. All4096 events, bound/order assertions, exact complete reset payloads and original timeout values remain. Source checkpoint d6f697a069c167ee40ae58b3ebb4c5a1ae4fe857; later head 2bbdbfc6420b0ffbe4592d19372f401081fdb7e3 changes only durable review/resume records. Independent final fixture pass found no source blocker. Runtime has refuted the64-renewal correction as sufficient: all three first attempts failed the same publication-count assertion. The five other scenarios are9/9 each. Corrected C3 is0/3; historical C3 remains5/6. Determine the precise remaining protected-floor/baseline-size condition; no further product or fixture guess was written.

The local no-headroom control reached its unchanged240-second limit while runner batches were still processing; it did not reach the capacity assertion. The harness started an automatic second attempt, which was stopped with the entire owned group and the build slot released. No local verdict or acceptance credit is claimed. The separate identical GitHub diagnostic completed0/1 red at the intended publication-count assertion after full old-cursor replay and released maintenance: no retry row.

Remote branches and unmerged state

Purpose Verified remote head Full branch URL State
wip/sol-coordfixC2 2bbdbfc6420b0ffbe4592d19372f401081fdb7e3 https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC2 Unmerged; no PR for current primary. Diagnostic branches intentionally fail.
wip/sol-coordfixC2-fixture-red e432816905079ac211b6795e0db263b45707172e https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC2-fixture-red Unmerged; no PR for current primary. Diagnostic branches intentionally fail.
wip/sol-coordfixC2-mutation-read a05fdf80d4a1dfa6f2bed6e4189cdc1fa9551984 https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC2-mutation-read Unmerged; no PR for current primary. Diagnostic branches intentionally fail.
wip/sol-coordfixC 1b357a7dbcf6f221d7cab85aea0d9b16e8140087 https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC Unmerged; no PR for current primary. Diagnostic branches intentionally fail.

No code was merged, deployed, published, uploaded to production or added to a merge queue in either lane. There is no deployed-but-unmerged code from this effort. Original lane temporary shards were cancelled/setup-failed and are not acceptance; their historical run URLs remain in the prior lane findings. Current helpers use temporary source snapshots with no unique product work; final stop must cancel unfinished runs and remove owned helpers before releasing the claim.

Terminal Actions, exact source snapshot

  • Invalid no-headroom diagnostic, e432816905079ac211b6795e0db263b45707172e: https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37816452193 .
  • Corrected finalgate7, d6f697a069c167ee40ae58b3ebb4c5a1ae4fe857: https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37816646566 .
  • Corrected finalgate8, same source: https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37816648992 .
  • Corrected finalgate9, same source: https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37816651194 .

All three attempted corrected runs above are terminal failure, each5/6 first passes and1/6 first failures, with0 retries. All owned helpers and local test JVMs are stopped; no subagent or scheduler remains active. No existing-contract or full-suite run has begun. No PR exists. Exact first-attempt ledger: https://github.com/CodexCoder21Organization/BuildTestEmbedded/blob/wip/sol-coordfixC2/out/coordfixC2-gate-ledger.md . Full findings, including filtered failure traces and lifecycle table: https://github.com/CodexCoder21Organization/BuildTestEmbedded/blob/wip/sol-coordfixC2/out/coordfixC2-findings.md . Review: https://github.com/CodexCoder21Organization/BuildTestEmbedded/blob/wip/sol-coordfixC2/out/coordfixC2-independent-review.md .

Resume steps and constraints

Cold resume for coordfixC2

The current handoff is url://handoff/handoffs/hf-2026-10-08-finish-the-decoded-journal-tail-bound-and-its-validation-gates . Read its live body first; this file records commands and the scope of unfinished gates. No PR may be opened before those gates complete. Do not merge, enqueue, deploy, alter the 0.0.112 pin, increase timeouts, reduce iteration counts, use mocks/reflection, or edit sibling compaction read/preparation locking or snapshot-cache paths.

Source and controls

  • Primary continuation branch: https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC2 . At the fixture correction checkpoint its head is d6f697a069c167ee40ae58b3ebb4c5a1ae4fe857 . Later findings-only checkpoints may advance it.
  • Intentionally invalid compaction-fixture diagnostic: https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC2-fixture-red . It holds before baseline collection and does not supply headroom; do not use it as an acceptance source.
  • Intentionally missing evicted-row reread: https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC2-mutation-read . Its old-cursor test is red; do not use it as an acceptance source.
  • Prior lane work remains at https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC . Its original partial gate claims are historical, not current acceptance.

Clone fresh into the assigned workspace directory. Read root README and applicable instructions. Fetch/rebase main before every build. Probe the Maven POM before each helper dispatch; classify download/setup failures as infrastructure with no verdict or credit. Wait one minute and use a new separately recorded label if infrastructure prevents a test from starting.

curl -fsS --max-time 20 -o /tmp/coordfixC2-probe.pom https://kotlin.directory/kompile/build-kotlin-jvm/0.0.33/build-kotlin-jvm-0.0.33.pom
git fetch origin
git rebase origin/main

New-test gates

Use the provided scratchpad/tools/gha-run.sh exactly, up to four simultaneous invocations. Select all six tests explicitly; all labels must be unique, tracked by PID/log, and stopped on terminal outcomes. The helper pushes committed HEAD. Commit/push the exact source checkpoint first.

<scratchpad>/tools/gha-run.sh coordfixC2 <checkout> gate<N> -- \
 --test tests/testProjectionDecodedTailBoundPreservesOldCursor.kts \
 --test tests/testProjectionDecodedTailBuildRuleHistory.kts \
 --test tests/testProjectionDecodedTailCacheWriteFailure.kts \
 --test tests/testProjectionDecodedTailConcurrentClose.kts \
 --test tests/testProjectionDecodedTailCrashRestart.kts \
 --test tests/testProjectionDecodedTailHistoryFitsDefaultHeap.kts

Download the targeted-test-results artifact from each Actions URL to an ignored output directory. Its test_log_file.xml uses direct <test> children; read the first row for each name, preserve every first failure and count retries separately. A later automatic pass never erases a first failure. The required result is each new scenario 20/20 first attempts on the corrected fixture, not twenty test rows summed across scenarios. See coordfixC2-gate-ledger.md for measured counts and superseded fixture history.

The local no-headroom attempt did not reach the targeted admission assertion before its 240-second child bound and was stopped during a harness retry. It has no diagnostic or acceptance credit. The GitHub no-headroom diagnostic is separate. Corrected runner fixture uses 64 genuine clock-advanced lease versions, each drained through latestProjectionCursor, confirms endCursor, restores the preparation hold and checks publication at the end of the released maintenance pass. Preserve all 4096 events and exact replay/reset payloads.

Existing contracts, then full suite

Only after new-test gates complete, select all projection filenames containing feed, compact, reset, recover, restart or soak, excluding these new decoded-tail tests; also include the five paging/close neighbors listed below. The currently prepared selection contains 217 files and has not been run. Regenerate from the final rebased head rather than assuming an old count is current.

  • tests/testClosedServiceCannotReopenProjectionJournal.kts
  • tests/testPagedJournalCleanupAfterAbruptStop.kts
  • tests/testPagedJournalCleanupPreservesOtherProcessOwner.kts
  • tests/testPagedLegacyJournalRetainsLostRowsAcrossCompactionAndRestart.kts
  • tests/testProjectionSnapshotPageIsParsedOutsideJournalLock.kts

Partition the selection into up to four helper invocations using durations from ci/test-durations.tsv, and select each file exactly once. Keep the manifest and every first-attempt verdict. Existing outside-scope failures must be classified with exact test names, full filtered traces and evidence; fix failures within the cache-bound change.

Then run the full suite on exactly four GitHub shards. Materialize the exact assignments using scripts/ci-test-shards.bash, as the repository workflow does; verify every test appears once. Create any owned shard worktrees outside the tested checkout (for example scratchpad/out/coordfixC2-shard1), since ignored nested source trees are still discovered by kompile and cause duplicate module/test errors. Dispatch each materialized committed shard through gha-run.sh with --test .. Never treat the previous lane's premature shards as acceptance. No full suite or existing-contract run has begun in this lane.

Reviews and PR

Read coordfixC2-independent-review.md for separate test and product passes. The review found and closed the direct-startup cache-write owner defect, which has an independent red test and six first-attempt fixed passes before the runner fixture correction. No static product blocker remains; runtime acceptance still gates the PR.

After all gates: fetch/rebase latest main, run required unit checks from that exact head, verify existing PR state before any update, push, and create a why-first PR with gh pr create --body-file. Explain the stale three-hour banner, 48% full-GC and approximately 957 MiB decoded-tail owner, link the production investigation and sibling work, document C1-C3/default256/lifecycle table and every gate. The body ends with 🤖 Generated with [Claude Code](https://claude.com/claude-code). Every commit ends with Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>. Stop after opening; never merge/enqueue/deploy. No PR currently exists.

Operational findings

The handoff CLI must select its real main: PATH="$HOME/bin:$PATH" coursier launch handoff:cli:0.0.8 -r https://kotlin.directory -M handoff.cli.MainKt -- .... Without -M it selects the demo. Use claim/report/update/release on the existing handoff rather than creating a duplicate. The report-challenge CLI was not invoked because it automatically merges, contrary to this task's explicit restriction; friction is retained in findings instead. rg is unavailable; Python/grep were used. No artificial load was used. No production actions occurred.

Documentation read and evidence limits

Root read README, linked production coord3 and coord2 evidence, TESTING, PHILOSOPHY, STATE_MANAGEMENT, CQRS, EMBEDDED and root CODE_REVIEW as recorded in findings. Independent review lists the exact full documents or sections it read rather than claiming runtime evidence. Required pickup documents:

  • https://github.com/CodexCoder21Organization/DocumentationRepository/blob/main/architecture/TESTING.md
  • https://github.com/CodexCoder21Organization/DocumentationRepository/blob/main/architecture/STATE_MANAGEMENT.md
  • https://github.com/CodexCoder21Organization/DocumentationRepository/blob/main/architecture/CQRS.md
  • https://github.com/CodexCoder21Organization/DocumentationRepository/blob/main/architecture/EMBEDDED.md
  • https://github.com/CodexCoder21Organization/DocumentationRepository/blob/main/CODE_REVIEW.md
  • https://github.com/CodexCoder21Organization/DocumentationRepository/blob/main/PHILOSOPHY.md

No question or approval is pending from the user. The remaining work is verification, not a requested deployment. The deadline is an explicit session stop, not evidence that the implementation is done or an external blocker.

Final unresolved finding

The64 genuine renewals and final cursor confirmation did not make publication eligible in3/3 first attempts. This refutes that correction, despite its static review. The complete assertion traces are in the primary branch findings. Keep the failing fixture unchanged while identifying the exact retained reader floor and baseline/overlay counts through the public service path; then establish a deterministic red/green contract before20/20. Do not increase timeouts, weaken reset assertions or choose another count without measuring the mechanism. No PR may be opened until all required gates complete.

Continuation validation at 21:42 UTC

Repaired product remains 08433a04d; evidence checkpoint is https://github.com/CodexCoder21Organization/BuildTestEmbedded/tree/wip/sol-coordfixC4. All six new scenarios passed 1/1 fresh first attempt in https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846633358; affected startup/compaction pair is 2/2 fresh after repair. The unchanged 128 MiB large-delta reproducer is 5/5 first passes after the repair, with zero retries; additional proof URLs are https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37847631351 and https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37847633465. All helpers except 217-contract validation have ended. That run is https://github.com/CodexCoder21Organization/BuildTestEmbedded/actions/runs/37846631323. Original 20/20 figures remain pre-repair; repaired-head gate credit and PR CI are not complete.