Canvas LMS 2026-05-20.143-CE-ubuntu24.04-r4 build trail
How ReadyStack built readystack/canvas:2026-05-20.143-CE-ubuntu24.04-r4 and its build kit, copied record by record: why the release exists, every chain, drive and stage it went through, the model work, the review rounds, the defects, the checks that verified it and when it was published. Each line names the record it comes from in brackets; a record that does not exist for this release says so.
This trail
As JSON- Image
readystack/canvas:2026-05-20.143-CE-ubuntu24.04-r4 - Index digestsha256:5aa55bef2b8ef58d532ebc4113de5342c96ac3624d25ef20c120810b960491b3
- linux/amd64 digestsha256:35fec244da0d80bd6aa6c7dd437ac1230552ce37a4aa1f07ce70f67ade3156a0
- Archive
ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.tar.gz - Archive SHA-256 nowe96c1f38b9050073e0d9fc441832cb04d86c1d9ea8e3a2f24b096e96423c4771
- Pins record
docs/PINS.md,docs/provenance/PINS.jsonin the archive (since generated) - Generated2026-11-10T08:45:55Z by KitForge release/build_trail.py
- Sections9 sections, 8 fully recorded; 1 item not recorded
Signed with the release key The trail's signature is a Sigstore bundle beside it. Check it is ours before you rely on it:
cosign verify-blob --key https://readystack.dev/keys/cosign.pub \ --bundle ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.trail.json.sigstore ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.trail.json
IdentityWhy this release existsThe path through the harnessModel work per stageReviewDefectsVerificationPublicationPackages and CPU level
Identity
Fully recorded- ProductCanvas LMS (canvas) [MANIFEST.json]
- Release tag2026-05-20.143-CE-ubuntu24.04-r4 [MANIFEST.json]
- Imagereadystack/canvas:2026-05-20.143-CE-ubuntu24.04-r4 [MANIFEST.json]
- Image index digestsha256:5aa55bef2b8ef58d532ebc4113de5342c96ac3624d25ef20c120810b960491b3 [docs/provenance/LOCKED_DIGEST.txt]
- linux/amd64 image digestsha256:35fec244da0d80bd6aa6c7dd437ac1230552ce37a4aa1f07ce70f67ade3156a0 [ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.rebuild.json, subject.image_manifest_digest]
- ArchiveReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.tar.gz (bytes 1010979048) [MANIFEST.json]
- Archive sha256 at publishe96c1f38b9050073e0d9fc441832cb04d86c1d9ea8e3a2f24b096e96423c4771 [MANIFEST.json, tarball_sha256]
- Archive records agreeyes [MANIFEST.json, PUBLISH_MANIFEST.json and .cutover.json name the same sha256]
- Repack historynone: the archive is as first published [MANIFEST.json, repack_history]
- Upstream repositoryhttps://github.com/instructure/canvas-lms [docs/provenance/SOURCE_TREE_HASH.json]
- Upstream refrelease/2026-05-20.143 [docs/provenance/SOURCE_TREE_HASH.json]
- Upstream commit2e2b4a46d08e32667d4845f7b78e1214250345d3 [docs/provenance/SOURCE_TREE_HASH.json]
- Source tree hash222ae1df10656048500098d09530d7337d8bb8fb99e7e3676629165870c2e1af (files 22662) [docs/provenance/SOURCE_TREE_HASH.json, tree_listing_sha256 (sha256 of the sorted file listing)]
- Kit tree hashsha256:3d60a82f2f5fa764ea80adb6adc5feaf03d039aabad6923fa0354024c7b771da [ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.rebuild.json, inputs.tree_hash]
- SOURCE_DATE_EPOCH1794290162 (utc 2026-11-10T05:56:02Z) [ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.rebuild.json, inputs.source_date_epoch]
- Base images
- ref ubuntu:24.04@sha256:fe81560990fae86dc4743202b2cb4d3df98d0bcf949173cecef15ce1127ef852 · platform digest sha256:78d4744ead1f5b19b04d0df558ab182a5300903900755e515b2ca4d10eb2044d
- BuildKitmoby/buildkit:v0.31.2 (image digest sha256:e0e67ea9c4bb07bdef683e29f70f3b623d1eb9c82274a9ec04e6bb0511449fb0) [ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.rebuild.json, engine]
- Engine commit(s)
- commit e3eaace0a74e1a10fea82b44f3849ea9a0e2216a · dirty yes · first drive 4148
- commit 8f330f31aa066ed1381d543d473df5415ecba80a · dirty yes · first drive 4166
Why this release exists
Fully recorded- Chain941 (created 2026-11-10T06:09:12Z · trigger customer_request · upstream version 2026-05-20.143) [chains, chains #941]
- Requestbuild request #621 (rebuild) (requested at 2026-11-10T06:02:06Z · requested by kitforge-agent · version 2026-05-20.143) [build_requests, build_requests #621]
- Reasonrevision 2026-05-20.143-CE-ubuntu24.04-r4: same upstream version re-dated by its own release (owner 2026-11-10 "date images correctly") [build_requests, build_requests #621 request_reason]
- Supersedesreadystack/canvas:2026-05-20.143-CE-ubuntu24.04-r3 (chain 904) [chains, chains #904]
The path through the harness
Fully recorded1 chain · 2 drives · 18 stages · 1 rewind
Chain 941 release · ready_to_ship
Created 2026-11-10T06:09:12Z, upstream 2026-05-20.143, build request 621 [chains, chains #941]
| Drive | Started | Minutes | Build host | How it stopped |
|---|---|---|---|---|
| 4148 | 2026-11-10T06:09:52Z | 87.7 | build host 1 withhold-publish | ready_to_ship at package_archive; 19 ticks [drive_runs, drive_runs #4148] |
| 4166 | 2026-11-10T08:31:22Z | — | build host 1 publish-held | not recorded [drive_runs, drive_runs #4166] |
Stages, in order
| Stage | First start | Passed | Attempts | Gate checks passed | Artifacts (SHA-256) |
|---|---|---|---|---|---|
intake |
2026-11-10T06:10:02Z | 2026-11-10T06:10:03Z | 1 | 4
|
order_json a1027e93ceed… |
acquire |
2026-11-10T06:10:35Z | 2026-11-10T06:10:38Z | 1 | 12
|
source_tree cab5b8b605e3…license_file 57c8ff33c9c0…custody_inputs 245070a7f8a1…source_tree_hash 642cb5fb3665…source_file_manifest c2d9b38b00e9… |
plan |
2026-11-10T06:11:13Z | 2026-11-10T06:11:13Z | 1 | 10
|
recon_report ef5d2c05c675…input_pin_plan 94a2c2493f85…toolchain_lock cc389221fe42… |
assemble_kit |
2026-11-10T06:45:38Z | 2026-11-10T06:45:39Z | 1 | 27
|
dockerfile 062a9e637eb1…build_recipe d27d20e4a0ed…system_pinning 762ec5577126…build_offline_sh 6633aa31b6b4…generate_sbom_sh ce0f1e6f1e70…first_boot_health 60d3e7a11f32…verify_offline_sh 3e8184ea230c…base_image_digests db1a64ed3312…dockerfile_offline 062a9e637eb1…first_build_digest 346dfdd68800… |
remediate |
2026-11-10T06:46:31Z | 2026-11-10T06:46:32Z | 1 | 8
|
vendored_apt e3b0c44298fc…remediation_log 4f6c55b5890f…security_report e39b2ec19378… |
build_kit |
2026-11-10T07:06:37Z | 2026-11-10T07:06:38Z | 1 | 9
|
cosign_stamp 256677ed92ac…locked_digest af2293cedb3e…freeze_manifest 3575928f936d…offline_rebuild_transcript 7170e50ef504… |
verdict |
2026-11-10T07:09:53Z | 2026-11-10T07:09:54Z | 1 | 8
|
scout_verdict ff27dd8ade2f… |
publish_image |
2026-11-10T07:11:20Z | 2026-11-10T07:11:21Z | 1 | 7
|
hub_readme 54cbd65977dc…promotion_record 7472ec9f12b8… |
boot_instance |
2026-11-10T07:13:15Z | 2026-11-10T07:13:18Z | 2 | 3
|
instance_handle a87b4e35c5a9… |
sbom |
2026-11-10T07:14:06Z | 2026-11-10T07:14:07Z | 1 | 5
|
sbom_md 0d2862ec885d…sbom_json bba5b43ab56c… |
schema_discovery |
2026-11-10T07:14:09Z | 2026-11-10T07:14:10Z | 1 | 7
|
schema_hash 381015f79a1b…dependency_tree 61fe400e72b6…table_classification 59cee695e5a5… |
admin_handbook |
2026-11-10T07:14:16Z | 2026-11-10T07:14:17Z | 1 | 7
|
api_map 80bc742414c1…admin_handbook b9e47513e737… |
db_handbook |
2026-11-10T07:14:25Z | 2026-11-10T07:14:26Z | 1 | 8
|
db_handbook b103355ba5d2…seed_isolation c29b1a346a6a… |
seed_data |
2026-11-10T07:14:35Z | 2026-11-10T07:14:36Z | 1 | 6
|
seed_data_sql a0f6af47712c…seed_cases_json d84a43edfa8a… |
seed_validate |
2026-11-10T07:14:38Z | 2026-11-10T07:14:39Z | 1 | 3
|
seed_data_contract bec377232929… |
usecase_validate |
2026-11-10T07:15:00Z | 2026-11-10T07:15:01Z | 1 | 10
|
failed_tests 7049ef0cac04…passed_tests cd6cd7793b93…test_results 476eae2b1fcd…usecase_contract f61bea228956… |
finalize_docs |
2026-11-10T07:15:07Z | 2026-11-10T07:15:07Z | 1 | 9
|
defects_json dbe1ea7d5d61…release_notes 127470f7eb57…api_integration_guide f4c456a24de9… |
package_archive invalidated 2026-11-10T08:30:45Z |
2026-11-10T07:37:28Z | 2026-11-10T07:37:31Z | 1 | 35 (final gate PASS)
|
sale_tar b13de9e7e88c…checksums 9d898b07d288…verify_md 8f58412a5932…rebuild_md 8c6de1fe9e47…manifest_txt e30472a3dc45…actions_jsonl b3f66307b02d…provenance_md 1289782ffa67…assetchain_log_md e9eccaec0c0f…assetchain_log_json 4297ef17be8d… |
[stage_runs]
Rewinds
- 2026-11-10T08:30:45Z:
package_archivetopackage_archiveon docs_redo (scripts/redo-docs.py --stage package_archive) [stage_events, stage_events #30420]
Model work per stage
Fully recordedRole: writer model. Calls up to 2026-11-10T07:37:31Z.
5 calls over 3 stages
| Stage | Calls | Refused | Errors | Max attempt | Forced commits | Real tokens | Lesson rules shown |
|---|---|---|---|---|---|---|---|
plan | 2 | 0 | 0 | 1 | 0 | 10660 | — |
remediate | 2 | 0 | 0 | 1 | 0 | 16040 | L-A08, L-038, L-036, L-034, L-032 |
usecase_validate | 1 | 0 | 0 | 1 | 0 | 1658 | — |
[micro_step_runs] [lesson_recalls]
Review
Fully recordedRole: review model.
1 round, 1 counted, $0.27 recorded cost
| Round | Started | Critical | Major | Minor | Verdict | Cost | Cap in force | Archive reviewed |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-11-10T07:38:34Z | 0 | 0 | 0 | clean to publish [held_rounds, held_rounds #1689] | $0.27 | 3 rounds, $40.00 | b13de9e7e88c… |
Defects
Fully recorded- Ledger entries2 [defects, defects where product_slug=canvas and this tag or chain]
- Disclosed in the archive2 [docs/defects/defects.json, entries]
2 ledger entries: by severity low 2; by status fixed-before-release 1, open 1.
| Defect | Severity | Status | Found by | Fixed in |
|---|---|---|---|---|
RSD-canvas-77f36e1921Admin handbook: The handbooks call Redis a disposable cache and describe starting over on an empty database, but do not say that a Redis left over from an earlier database makes db:initial_setup fail; the customer… [defects, defects #229105] | low | fixed-before-release | held review (review model) | — |
RSD-canvas-9fbe429124Docker Hub README: The Docker Hub README names only the Gemfile.d/app.rb line although the diff also changes Gemfile.lock and the build removes spec/, .github/ and the workspace package.json files. [defects, defects #229106] | low | open | held review (review model) | — |
Verification
1 item not recorded- Reproduced before publishingyes (rebuilt digest sha256:35fec244da0d80bd6aa6c7dd437ac1230552ce37a4aa1f07ce70f67ade3156a0 · published digest sha256:35fec244da0d80bd6aa6c7dd437ac1230552ce37a4aa1f07ce70f67ade3156a0 · digest match yes · builder moby/buildkit:v0.31.2 · build seconds 537) [docs/provenance/REPRO_VERIFICATION.json, verified]
- Final contract gate (G8)PASS (checks artifact_coverage, assetchain_coverage, cosign, cpu_baseline, offline_rebuild, rebuild_manifest, scan_grade, scout_grade_a, script_copies, tag_base_os, thread_exit, trademark_shipped, vex_shipped) [g8_result.json, result]
- Grade at releaseA (percent 94 · docker grade B · docker percent 83 · tool docker scout policy 1.26.0 · config docker-default · org vex no · at 2026-11-10T08:32:25Z · failing Docker Scout counts 119 packages with copyleft licences (AGPL, GPL, LGPL, MPL), 111 of them operating-system packages (it counts only packages whose licence it can read; the SBOM lists every component). AGPL: academic_benchmarks. · corrections No outdated base images) [SCOUT_EVIDENCE.json, docker_scout_policy.corrected]
- Image signatureverified on the index and the linux/amd64 manifest (key fingerprint 04daa92344a52dbc · at 2026-11-10T08:31:35Z) [docs/provenance/IMAGE_EVIDENCE.json, signed]
- Image signature transparency-log entries
- log index 3780668209 · transparency-log entry
- log index 3780670203 · transparency-log entry
- rebuild.json signatureSigstore bundle, release key (key fingerprint 04daa92344a52dbc · log index 3782325785 · transparency-log entry · integrated 2026-11-10T08:44:06Z) [ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.rebuild.json.sigstore, verificationMaterial.tlogEntries[0]]
- Signed attestations
- kind provenance · digest sha256:5aa55bef2b8ef58d532ebc4113de5342c96ac3624d25ef20c120810b960491b3 · state attached · log index 3782328083 · transparency-log entry
- kind sbom · digest sha256:5aa55bef2b8ef58d532ebc4113de5342c96ac3624d25ef20c120810b960491b3 · state attached · log index 3782329331 · transparency-log entry
- kind vsa · digest sha256:5aa55bef2b8ef58d532ebc4113de5342c96ac3624d25ef20c120810b960491b3 · state attached · log index 3782330972 · transparency-log entry
- kind provenance · digest sha256:35fec244da0d80bd6aa6c7dd437ac1230552ce37a4aa1f07ce70f67ade3156a0 · state attached · log index 3782331796 · transparency-log entry
- kind sbom · digest sha256:35fec244da0d80bd6aa6c7dd437ac1230552ce37a4aa1f07ce70f67ade3156a0 · state attached · log index 3782332599 · transparency-log entry
- kind vsa · digest sha256:35fec244da0d80bd6aa6c7dd437ac1230552ce37a4aa1f07ce70f67ade3156a0 · state attached · log index 3782335027 · transparency-log entry
- Pins recorddocs/PINS.md and docs/provenance/PINS.json in the archive (https://readystack.dev/products/canvas/recipe) [docs/provenance/PINS.json]
Offline clean-room rebuilds
- 2026-11-10T07:38:41Z on build host 1 (Docker-in-Docker daemon with --network none): bit for bit yes, digest match yes, customer verify yes
rebuilt sha256:35fec244da0d80bd6aa6c7dd437ac1230552ce37a4aa1f07ce70f67ade3156a0 [clean-room rebuild ledger, runs[721]]
- Not recorded: the policy tool's --result-file itself (its per-policy results are copied into SCOUT_EVIDENCE.json and the archive's IMAGE_EVIDENCE.json; the file is not kept)
Publication
Fully recorded 1 pending at generation- Image pushed (internal tag), publish_image passed2026-11-10T07:11:21Z [stage_runs, stage_runs chain 941 stage publish_image]
- Archive manifests written2026-11-10T08:38:36Z [PUBLISH_MANIFEST.json, published_at]
- Pending at generation: the archive cut-over on prodasset, the release tag's promotion and the site event (this trail was generated after G8 and before them; they are appended as a 'publication' event in History)
Packages and CPU level
Fully recorded- x86-64 level the image needsv1 (used v4 · baseline v2 · elf files 1044 · probed 2026-11-10T06:57:26Z · source build_kit) [release_images, isa_level_hard]
History
2 events- 2026-11-10T08:45:55Z generated: by KitForge release/build_trail.py · generator commit 8f330f31aa066ed1381d543d473df5415ecba80a
- 2026-11-10T08:48:36Z publication: promoted at 2026-11-10T08:46:35Z · promoted digest sha256:5aa55bef2b8ef58d532ebc4113de5342c96ac3624d25ef20c120810b960491b3 · promotion method imagetools_create_retag_by_digest_no_rebuild · site event 447 · checklist status complete · checklist at 2026-11-10T08:48:36Z · record workspace: deliverables/provenance/PROMOTION_RECORD.json, RELEASE_CHECKLIST.json
Records
25 records| Record | Where it is | Rows |
|---|---|---|
docs/defects/defects.json | inside the archive (ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.tar.gz) | — |
docs/provenance/IMAGE_EVIDENCE.json | inside the archive (ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.tar.gz) | — |
docs/provenance/LOCKED_DIGEST.txt | inside the archive (ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.tar.gz) | — |
docs/provenance/PINS.json | inside the archive (ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.tar.gz) | — |
docs/provenance/REPRO_VERIFICATION.json | inside the archive (ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.tar.gz) | — |
docs/provenance/SOURCE_TREE_HASH.json | inside the archive (ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.tar.gz) | — |
MANIFEST.json | beside the archive (prodasset /data/production/canvas/2026-05-20.143-CE-ubuntu24.04-r4/), as staged for publishing | — |
PUBLISH_MANIFEST.json | beside the archive (prodasset /data/production/canvas/2026-05-20.143-CE-ubuntu24.04-r4/), as staged for publishing | — |
ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.rebuild.json | beside the archive (prodasset /data/production/canvas/2026-05-20.143-CE-ubuntu24.04-r4/), as staged for publishing | — |
ReadyStack-canvas-2026-05-20.143-CE-ubuntu24.04-r4.rebuild.json.sigstore | beside the archive (prodasset /data/production/canvas/2026-05-20.143-CE-ubuntu24.04-r4/), as staged for publishing | — |
SCOUT_EVIDENCE.json | beside the archive (prodasset /data/production/canvas/2026-05-20.143-CE-ubuntu24.04-r4/), as staged for publishing | — |
clean-room rebuild ledger | the clean-room rebuild ledger (runstate/audit-2026-09/bit4bit.json, not published) | — |
build_requests | sadb, ReadyStack's engine database (not published) | 621 |
chains | sadb, ReadyStack's engine database (not published) | 941 |
defects | sadb, ReadyStack's engine database (not published) | canvas 2026-05-20.143-CE-ubuntu24.04-r4 |
drive_runs | sadb, ReadyStack's engine database (not published) | chain 941 |
held_rounds | sadb, ReadyStack's engine database (not published) | chain 941 |
lesson_recalls | sadb, ReadyStack's engine database (not published) | chain 941 |
micro_step_runs | sadb, ReadyStack's engine database (not published) | chain 941 |
release_images | sadb, ReadyStack's engine database (not published) | canvas 2026-05-20.143-CE-ubuntu24.04-r4 |
stage_events | sadb, ReadyStack's engine database (not published) | chain 941 |
stage_runs | sadb, ReadyStack's engine database (not published) | chain 941 |
attestations.json | the chain's workspace on the controller (not published) | — |
deliverables/provenance/PROMOTION_RECORD.json | the chain's workspace on the controller (not published) | — |
g8_result.json | the chain's workspace on the controller (not published) | — |