# OCI Weekly Discussion

###### tags: `oci` `discussion`

Time: 1700 GMT (1300 EST; 1000 PST; 1900 CET; 0300 AEST; 0100 CST)

- [OCI Calendar](https://calendar.google.com/calendar/embed?src=linuxfoundation.org_i0sado0i37eknar51vsu8md5hg%40group.calendar.google.com)
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Working groups:

- Auth: <https://hackmd.io/YyhWh7X_RuCod0i0mGxVLg>
- Image Compatibility: <https://hackmd.io/060HKC3DTV-NzzewNQbHCg>
- FreeBSD: <https://hackmd.io/hq_NOVL4RZS7xYYMqfJ6-A>

*template at the bottom*

## May 7, 2026

**Recording**: https://youtu.be/48V0nhy9KEQ

### Attendees:

- Tianon
- Brian Goff
- Brandon Mitchell
- Shaon Hossain
- Jeff Carter
- Jory Burson
- Mike Brown
- Sajay Antony
- Brandon Klein
- Ramkumar Chinchani
- Samuel Karp

### Actionable Agenda Items:

- distribution-spec reviews:
- provide non-canonical digest algorithm hint to registries on blob upload: <https://github.com/opencontainers/distribution-spec/pull/543>
- conformance v2: <https://github.com/opencontainers/distribution-spec/pull/588>
- oci-conformance processing of conformance v2: <https://github.com/opencontainers/oci-conformance/pull/130>
- conformance v2 blog post: <https://github.com/opencontainers/opencontainers.org/pull/167>
- RFC pointers and HTTP Redirect support: <https://github.com/opencontainers/distribution-spec/pull/607> (merged)
- Tag History extension: <https://github.com/opencontainers/distribution-spec/pull/606>
- image-spec reviews:
- `.wh.` filename handling: <https://github.com/opencontainers/image-spec/pull/1314> (merged)
- one sentence per line: <https://github.com/opencontainers/image-spec/pull/1315>

### Presentation/Discussion Agenda Items:

- MUST or SHOULD clients follow redirects? <https://github.com/opencontainers/distribution-spec/pull/607/changes#r3139647507>
- Interest in a "reference" spec?
- <https://github.com/opencontainers/tob/pull/114>
- <https://github.com/opencontainers/distribution-spec/issues/610>
- Request to improve readability in distribution-spec: <https://github.com/opencontainers/distribution-spec/issues/609>
- json v2 is likely accept in Go: <https://github.com/golang/go/issues/71497>
- repository listing endpoint (_catalog replacement): <https://github.com/opencontainers/distribution-spec/pull/611>

### Notes:

Notes from the zoom chat:

00:04:41 Jory Burson: Go Ready!
00:11:06 Sajay Antony: Really happy that we are tacking the delete.
00:11:52 Sajay Antony: Actually pointing to the deleted digest makes sense.
00:21:30 Brian Goff: I would want to skip it in the runtime so as not to break existing images.
00:21:41 Sajay Antony: @Brian Goff I’ll probably lean in on you to consider if white out files would cause any issue 😁
00:24:32 Ramkumar Chinchani: are we breaking the dist-spec if not MUST?
00:37:09 Sajay Antony: Need to drop for another meeting folks. Thank you all.
00:37:21 Brian Goff: NTD for another meeting as well.
00:38:12 Ramkumar Chinchani: are we envisioning a separate 1.0.x and 1.1.x and 1.2.x series forever?
00:40:06 Jory Burson: I need to drop to take a quick call! Back in a few, I think!
00:45:08 Tianon: https://github.com/distribution/distribution/blob/7287385db888a5391c99caa9c608395ccca06f0e/docs/content/spec/api.md#listing-repositories for anyone curious about the OG _catalog spec
00:51:21 Tianon: https://oci.dag.dev/?repo=registry.k8s.io
00:51:40 Tianon: Replying to "https://oci.dag.dev/?repo=registry.k8s.io" https://oci.dag.dev/?repo=registry.k8s.io%2Fetcd
00:52:01 Tianon: Replying to "https://oci.dag.dev/?repo=registry.k8s.io" https://oci.dag.dev/?repo=registry.k8s.io%2Fetcd%2Fetcd
00:52:12 Ramkumar Chinchani: Replying to "https://oci.dag.dev/?repo=registry.k8s.io" tags=[], child=[...]

## April 30, 2026

**Recording**: https://youtu.be/Wi8229j9K9Y

### Attendees:

- Brandon Mitchell
- Samuel Karp
- Tianon
- Brian Goff
- Jeff Carter

### Actionable Agenda Items:

- distribution-spec reviews:
- provide non-canonical digest algorithm hint to registries on blob upload: <https://github.com/opencontainers/distribution-spec/pull/543>
- conformance v2: <https://github.com/opencontainers/distribution-spec/pull/588>
- oci-conformance processing of conformance v2: <https://github.com/opencontainers/oci-conformance/pull/130>
- conformance v2 blog post: <https://github.com/opencontainers/opencontainers.org/pull/167>
- RFC pointers and HTTP Redirect support: <https://github.com/opencontainers/distribution-spec/pull/607>
- image-spec reviews:
- `.wh.` filename handling: <https://github.com/opencontainers/image-spec/pull/1314>
- one sentence per line: <https://github.com/opencontainers/image-spec/pull/1315>

### Presentation/Discussion Agenda Items:

No agenda, meeting ended early.

### Notes:

Notes from the zoom chat:

00:05:14 Brian Goff: AiDHD

## April 23, 2026

**Recording**: https://youtu.be/oHI5eh_uNDE

### Attendees:

- Tianon
- Brandon Mitchell
- Jeff Carter
- Brian Goff
- Samuel Karp
- Sajay Antony
- Ramkumar Chinchani

### Actionable Agenda Items:

- Ready for review:
- provide non-canonical digest algorithm hint to registries on blob upload: <https://github.com/opencontainers/distribution-spec/pull/543>
- conformance v2: <https://github.com/opencontainers/distribution-spec/pull/588>
- oci-conformance processing of conformance v2: <https://github.com/opencontainers/oci-conformance/pull/130>
- conformance v2 blog post: <https://github.com/opencontainers/opencontainers.org/pull/167>

### Presentation/Discussion Agenda Items:

- Merged pushing digest with tag: <https://github.com/opencontainers/distribution-spec/pull/600>
- Tag History proposal (WIP): <https://github.com/opencontainers/distribution-spec/pull/606> (Jeff)
- Suggested using `_oci/tags/history` extension for the endpoint to avoid name collisions
- Discussed removal of parts of spec in <https://github.com/opencontainers/distribution-spec/issues/443>
- Need to link to HTTP RFCs for redirects <https://github.com/opencontainers/distribution-spec/issues/397>
- Currently link to <https://www.rfc-editor.org/rfc/rfc9110.html#name-range-requests> for handling range requests

### Notes:

Notes from the zoom chat:

00:08:11 Brandon Mitchell: /v2/project-x/tag/manifests/history
00:22:02 Sajay Antony: It will be easier to route that off
00:23:43 Ramkumar Chinchani: "standardized" extensions under OCI pls
00:26:12 Ramkumar Chinchani: pagination, query, etc should be a standard thing for blobs, manifests, "tags", catalog, etc endpoints? we are approaching this piecemeal
00:27:15 Sajay Antony: Replying to "pagination, query, etc should be a standard thing for blobs, manifests, "tags", catalog, etc endpoints? we are approaching this piecemeal" Its always about who has the energy to push these through.
00:30:21 Ramkumar Chinchani: the risk is every endpoint behavior looks different if piecemeal
00:41:26 Sajay Antony: Sorry I need to jump only another security call. Happy to send an update to the PR with the RFC link if folks want to comment in the issue.

## April 16, 2026

**Recording**: https://youtu.be/uCANZLOKKP4

### Attendees:

- Brandon Mitchell
- Brian Goff
- Mike Brown
- Jeff Carter
- Sajay Antony
- Ramkumar Chinchani
- Samuel Karp

### Actionable Agenda Items:

- Ready for review:
- push digest with tag: <https://github.com/opencontainers/distribution-spec/pull/600>
- provide non-canonical digest algorithm hint to registries on blob upload: <https://github.com/opencontainers/distribution-spec/pull/543>
- conformance v2: <https://github.com/opencontainers/distribution-spec/pull/588>
- oci-conformance processing of conformance v2: <https://github.com/opencontainers/oci-conformance/pull/130>
- conformance v2 blog post: <https://github.com/opencontainers/opencontainers.org/pull/167>

### Presentation/Discussion Agenda Items:

- OCI Certification (vs Conformance)
- <https://opencontainers.org/community/certified/>
- <https://github.com/opencontainers/oci-conformance/blob/main/README.md#oci-certified-conformance-program>
- Clarify `.wh.`: <https://github.com/opencontainers/image-spec/pull/1314/>

### Notes:

Notes from the zoom chat:

00:10:35 Sajay Antony: Its better to discuss with Jory on this.
00:12:25 Sajay Antony: I believe the ancestors had good reasoning to do these things.
00:12:44 Sajay Antony: But always good to revisit.
00:14:23 Brian Goff: Wait, what is this list? I don't remember this.
00:14:56 Sajay Antony: Yep I was confused as well and looking up who is Rob Dobin.
00:15:55 Brian Goff: Haven't worked at Docker since 2018
00:17:24 Sajay Antony: I'm ok following up for Microsoft but I honestly don't know where to start. Should we just open an issue and tag Jory on it?
00:35:18 Samuel Karp: That's what I sent to Brandon
00:35:26 Samuel Karp: I just didn't post it publicly on GitHub for that one
00:36:59 Sajay Antony: Headers is in the plural sense might be incorrect. But I'm ok merging and correcting as a follow up and I'm not a maintainer. So leaving the decision to the maintainers.
00:39:06 Brian Goff: At least we didn't have to litigate how to phrase this in the actual RFC
00:42:17 Brian Goff: Considering purchasing fieldlines.io

## April 9, 2026

**Recording**: https://youtu.be/EZolEXO1uUA

### Attendees:

- Brandon Mitchell
- Tianon
- Jeff Carter
- Ramkumar Chinchani
- Derek McGowan
- Brian Goff
- Jory Burson
- Samuel Karp

### Actionable Agenda Items:

- Ready for review:
- push digest with tag: <https://github.com/opencontainers/distribution-spec/pull/600>
- provide non-canonical digest algorithm hint to registries on blob upload: <https://github.com/opencontainers/distribution-spec/pull/543>
- conformance v2 PRs (see discussion links below).

### Presentation/Discussion Agenda Items:

- Conformance v2 status:
- conformance v2: <https://github.com/opencontainers/distribution-spec/pull/588>
- updates to oci-conformance: <https://github.com/opencontainers/oci-conformance/pull/130>
- separate spec.md changes: <https://github.com/opencontainers/distribution-spec/pull/602>
- Blog post ready: <https://github.com/opencontainers/opencontainers.org/pull/167>
- New/updated Endpoints:
- Tag History
- Tag Listing v2
- Issue: <https://github.com/opencontainers/distribution-spec/issues/575>
- PR: <https://github.com/opencontainers/distribution-spec/pull/579>
- PATCH /manifest to update tags without pushing full manifest
- The existing certified page on the website needs replacing:
- <https://opencontainers.org/community/certified/>
- <https://github.com/opencontainers/opencontainers.org/blob/main/content/community/certified.md>
- Discussion on treating distribution-spec more like a storage protocol
- Related discussion: <https://github.com/opencontainers/distribution-spec/discussions/587>

### Notes:

Notes from the zoom chat:

00:08:30 Ramkumar Chinchani: enables blake3 path?
00:08:59 Tianon: Replying to "enables blake3 path?" in the one place left where it was annoying, yeah
00:09:14 Tianon: Replying to "enables blake3 path?" where a client starts an upload without a digest, uploads the whole blob, then provides a digest
00:09:25 Tianon: Replying to "enables blake3 path?" so that they can include the digest-algorithm in that first "start upload" request
00:09:53 Tianon: Replying to "enables blake3 path?" (but even without that, a server can support blake3 here, it just requires a potentially expensive re-hash after the blob upload is already complete)
00:12:34 Tianon: https://github.com/opencontainers/distribution-spec/pull/579
00:15:35 Jory Burson: Oh hi
00:16:26 Ramkumar Chinchani: is this a "search" requirement, phrased differently?
00:18:18 Ramkumar Chinchani: Replying to "is this a "search" requirement, phrased differently?" search=X wtih "sort" "since" etc etc
00:21:54 Tianon: fwiw, I love "lightweight tag updates" and think it's worth time/consideration
00:23:39 Ramkumar Chinchani: Replying to "fwiw, I love "lightweight tag updates" and think it's worth time/consideration" related to multi-tag update?
00:24:21 Tianon: Replying to "fwiw, I love "lightweight tag updates" and think it's worth time/consideration" related yeah, but not necessarily only - if you know a registry already has a manifest's content, it's kind of silly to re-upload the entire manifest just to assign it to a new tag
00:24:53 Jory Burson: Is that reason to sh** talk each other
00:25:25 Sajay Antony: I'm here for weekly multi-vitamins.
00:25:37 Ramkumar Chinchani: most times just ... speechless, but currently connecting from a public place.
00:28:57 Jory Burson: lol
00:31:03 Ramkumar Chinchani: Crazy thought (maybe) ... why is dist-spec a different container thing and not similar to something like NFS and CIFS so that storage folks can just adopt.
00:31:48 Jory Burson: I have to drop 🙁 I am sorry I was late
00:32:31 Tianon: Replying to "Crazy thought (maybe) ... why is dist-spec a different container thing and not similar to something like NFS and CIFS so that storage folks can just adopt." see also https://github.com/opencontainers/distribution-spec/discussions/587 for some prior discussion (courtesy of Brandon having put a link to it on an issue recently)

## April 2, 2026

**Recording**: https://youtu.be/WPJ8otszuRY

### Attendees:

- Brandon Mitchell
- Tianon
- Brian Goff
- Derek McGowan
- Jeff Carter
- Shaon Hossain
- Jory Burson
- Samuel Karp

### Actionable Agenda Items:

- Ready for review:
- remove `go.sum` ignore: <https://github.com/opencontainers/distribution-spec/pull/601>
- conformance page should render conformance v2 output: <https://github.com/opencontainers/oci-conformance/pull/130>
- separate spec.md from rest of the changes into a separate PR
- conformance v2: <https://github.com/opencontainers/distribution-spec/pull/588>

### Presentation/Discussion Agenda Items:

- Pushing tags with a digest: <https://github.com/opencontainers/distribution-spec/pull/600>
- Desire for digest algorithm when pushing blobs with patch API
- <https://github.com/opencontainers/distribution-spec/pull/543>
- Conformance v2 progress:
- <https://github.com/sudo-bmitch/distribution-spec/tree/pr-conformance-v2/conformance>
- <https://github.com/opencontainers/distribution-spec/pull/588>
- <https://github.com/opencontainers/oci-conformance/pull/130>
- containerd/platforms limits on OS Features: <https://github.com/containerd/platforms/pull/29>

### Notes:

Notes from the zoom chat:

00:14:07 Jory Burson: Auth by one
00:24:49 Shaon Hossain: I think, it will have to enabled from Brandon’s account
00:24:49 Samuel Karp: I've been working on some review prompts too if you want more code review comments from an LLM 😂
00:31:22 Brian Goff: NTD for a team meeting.
00:37:48 Sajay Antony: Thanks for need to drop. Hope to see your PR merged Brandon.
00:37:58 Jory Burson: Branda-bot
00:48:55 Jory Burson: “It’s your fault for listening to us"

## March 26, 2026

**Recording**: https://youtu.be/VRDpKMj-Bx4

### Attendees:

- Tianon
- Brandon Mitchell
- Jory Burson
- Jeff Carter
- Shaon Hossain
- Samuel Karp
- Brian Goff

### Actionable Agenda Items:

None.

### Presentation/Discussion Agenda Items:

- The calendar link is not easy to find
- Tianon enthusiastically volunteered to update <https://github.com/opencontainers/opencontainers.org/blob/main/content/community/overview.md>
- Brandon said the website is a joy to maintain and he's happy to do it forever
- Should auth tokens be reused in conformance tests, and if so, how?
- <https://github.com/opencontainers/distribution-spec/pull/588#issuecomment-4129594822>
- Redesign go.mod/go.sum handling in distribution-spec?
- No objection, Brandon will work on a PR to use `go work`.

### Notes:

Notes from the zoom chat:

00:27:00 Brian Goff: hardware mic switch.
00:30:03 Brian Goff: C-suites

## March 25, 2026 KubeCon EU

**Recording**: https://youtu.be/DAnasIyCZ70

Location: D501, (5th Floor, Elcium building)

### Attendees:

- Mike Brown
- Alexander
- Krisztian
- Antonio
- Toru Komatsu
- Brandon Mitchell (remote)

### Actionable Agenda Items:

None.

### Presentation/Discussion Agenda Items:

- Networking
- <https://github.com/opencontainers/runtime-spec/blob/main/config-linux.md#network-devices>
- <https://github.com/opencontainers/runtime-spec/blob/main/config.md#posix-platform-hooks>
- CNI: <https://github.com/containernetworking/cni>
- NRI: <https://github.com/containerd/nri>
- CDI: <https://github.com/cncf-tags/container-device-interface>
- CRI: <https://github.com/kubernetes/cri-api>
- Considering a WG to collaborate
- OCI Podspec is still desired

### Notes:

None.

## March 19, 2026

**Recording**: https://youtu.be/hkyvyqnmXbU

### Attendees:

- Mike Brown (IBM - containerd/kubernetes/oci)
- Brandon Mitchell
- Brian Goff
- Tianon
- Jory Burson
- Jeff Carter
- Sajay Antony
- Shaon Hossain
- Ram Chinchani

### Actionable Agenda Items:

- Jory will look into getting a room at KubeCon EU

### Presentation/Discussion Agenda Items:

- Conformance v2 progress:
- <https://github.com/sudo-bmitch/distribution-spec/tree/pr-conformance-v2/conformance>
- <https://github.com/opencontainers/distribution-spec/pull/588>
- <https://github.com/opencontainers/oci-conformance/pull/130>
- Desire to allow failed conformance results to be uploaded to conformance page.
- Brandon should write a blog

### Notes:

Notes from the zoom chat:

00:08:59 Shaon Hossain: 👏
00:15:05 Tianon: shouldn't we not only allow but even encourage people to submit conformance results with failing tests? having a record of failing conformance seems more valuable than the alternative of folks not submitting because they're not 100% (which has been something that artificially blocks folks from submitting in the past, and the way you've structured these new tests makes it more obvious exactly what the nuance of the failures is)
00:15:52 Shaon Hossain: Curious, how did we pick what registry we put in this page? 🙂
00:16:21 Tianon: Replying to "Curious, how did we ..." all the registries listed on that page are self-conformance result submissions by each registry
00:17:18 Shaon Hossain: Replying to "Curious, how did we ..." we would like to add Quay in there too
00:17:45 Brian Goff: Failures are more interesting
00:19:36 Tianon: Replying to "Curious, how did we ..." if you'd like to submit with the current conformance tests, https://github.com/opencontainers/oci-conformance is the place to do so 🙂
00:23:55 Ramkumar Chinchani: is there a priority list for these tests?
ecosystem tooling may work just fine even with some failing tests.
00:24:17 Ramkumar Chinchani: but still would like to know when the tests fail.
00:27:19 Jory Burson: lololol
00:27:24 Shaon Hossain: Just curious, how are you testing sha512 blobs here?
00:36:29 Ramkumar Chinchani: keep tests simple?
00:37:03 Sajay Antony: Interested to see how the manifest push for 512 turns out. NTD folks. Good stuff Brandon. Thank you.
00:37:32 Ramkumar Chinchani: olareg is the only registry that is happy currently?
00:38:10 Ramkumar Chinchani: is there a priority list for these tests?
ecosystem tooling may work just fine even with some failing tests.
00:38:31 Tianon: I had some minor patches to https://pkg.go.dev/cuelabs.dev/go/oci/ociregistry/ocimem that had it happy for a while, but then Brandon kept adding more tests and broke it again in ways that were harder to fix 😂
00:39:22 Ramkumar Chinchani: Worry is we are focusing only on the server side. What if clients break when we fix the registry this way.
00:40:06 Ramkumar Chinchani: zot has client tests, so we will know soon enough
00:40:24 Ramkumar Chinchani: all of the above
00:41:36 Ramkumar Chinchani: baby steps
00:44:56 Jory Burson: Get it together Jeff
00:45:04 Jory Burson: jk
00:50:06 Brandon Mitchell: uses: sudo-bmitch/distribution-spec@pr-conformance-v2
00:51:01 Tianon: Replying to "uses: sudo-bmitch/di..." Brandon's GitHub username makes this look spicier than it is 😂
00:52:01 Jory Burson: BLOGG
00:52:04 Shaon Hossain: Replying to "uses: sudo-bmitch/di..." 🎉
00:52:09 Ramkumar Chinchani: unleash hell
00:52:12 Jory Burson: Web log
00:55:08 Ramkumar Chinchani: version the GH action

## March 12, 2026

**Recording**: https://youtu.be/52BtHhyMWRM

### Attendees:

- Brandon Mitchell
- Derek McGowan
- Brian Goff
- Samuel Karp
- Tianon (joined late)
- Jeff Carter (joined late)

### Actionable Agenda Items:

None.

### Presentation/Discussion Agenda Items:

- Packaging images with different layer media types with a platform.OS.Feature descriptor: <https://github.com/containerd/platforms/pull/16>
- Conformance v2 progress: <https://github.com/opencontainers/distribution-spec/pull/588>
- Reviewing 416 on out-of-order chunked data in put: <https://github.com/opencontainers/distribution-spec/pull/593>
- Reviewing pushing tags with a digest: <https://github.com/opencontainers/distribution-spec/pull/600>

### Notes:

Notes from the zoom chat:

00:13:39 Brian Goff: Want "docker build" to output erofs :)
Uphill battle trying to get people to want to spend time on erofs.
00:23:45 Derek McGowan: https://github.com/dragonflyoss/nydus/issues/1692
00:24:00 Samuel Karp: Maybe ECR should be compliant with the spec 😂
00:28:00 Brandon Mitchell: https://github.com/regclient/regclient/blob/ee44fc8d6c28e8f749ccb0a220e58cf2118a1a31/types/platform/platform_test.go#L146

## March 5, 2026

**Recording**: https://youtu.be/jooGiKOjoZw

### Attendees:

- Jeff Carter
- Brian Goff
- Tianon
- Brandon Mitchell
- Shaon Hossain
- Sajay Antony
- Jory Burson
- Samuel Karp

### Actionable Agenda Items:

None.

### Presentation/Discussion Agenda Items:

- Push by digest with multiple tags support: <https://github.com/opencontainers/distribution-spec/pull/600>
- Brandon will add to the new conformance test with a version-gate in the next few weeks.
- Jeff will fix pushing to Docker Hub with a non-canonical digest algorithm.
- Upcoming events: <https://docs.google.com/spreadsheets/d/1SUF-qTBEY4_mV1ERgP_TM3VYidfZPp9boSsCs1nH4v0/edit?gid=0#gid=0>
- Jory will check if anyone can make KubeCon Japan
- Brandon and Sam will try to make KubeCon US
- TOB meeting topics:
- <https://github.com/opencontainers/tob/issues/154>
- <https://github.com/opencontainers/tob/issues/155>
- <https://github.com/opencontainers/tob/issues/151>

### Notes:

Notes from the zoom chat:

00:04:53 Brian Goff: What is this? MUST support pushing 5 times at once, and SHOULD NOT set an upper limit
00:09:48 Brandon Mitchell: For folks just joining, we don't have much of an agenda today, so add anything you'd like to talk about.
00:11:03 Tianon: "trouble, right here in river city"
00:11:28 Jory Burson: I think P stands for Party
00:11:49 Tianon: Replying to ""trouble, right here..." https://www.imdb.com/title/tt0056262/
00:12:54 Jeff Carter: Replying to "What is this? MUST ..." 5 tags 🤦
00:17:57 Jory Burson: Yay!
00:30:00 Sajay Antony: Thanks for organizing the meeting Jory.
00:30:58 Brandon Mitchell: https://github.com/opencontainers/tob/issues/151
00:31:00 Sajay Antony: Thank you all. NTD for another meeting.
00:32:11 Brian Goff: NTD folks.
00:32:23 Brian Goff: Have a great rest of your week.
00:32:44 Tianon: "one container to open them all"
00:40:45 Samuel Karp: only on festivus
00:42:41 Tianon: I'm impressed that Brandon read the IRC logs - makes me feel even better about making sure we preserve them

## February 26, 2026

**Recording**: https://youtu.be/4YNhV8P_sn4

### Attendees:

- Brandon Mitchell
- Tianon
- Brian Goff
- Jory Burson
- Jeff Carter
- Sajay Antony
- Derek McGowan
- Ramkumar Chinchani
- Syed Ahmed
- _add yourself_

### Actionable Agenda Items:

- Review needed for making Docker-Content-Digest non-optional: <https://github.com/opencontainers/distribution-spec/pull/595>

### Presentation/Discussion Agenda Items:

- Pushing multiple tags: <https://github.com/opencontainers/distribution-spec/pull/600>
- Blob upload proof of ownership: <https://groups.google.com/a/opencontainers.org/g/dev/c/DEseqbBsXeE>

### Notes:

Notes from the zoom chat:

00:09:18 Ramkumar Chinchani: how often does this requirement come up?
00:09:36 Ramkumar Chinchani: need to push multiple tags for same manifest?
00:10:26 Ramkumar Chinchani: golang 1.25.x, 1.25, latest for every 1.25.x
00:10:51 Brandon Mitchell: ^ that's the common use case (plus a non-canonical digest + tag)
00:13:53 Derek McGowan: Busy busy 😀
00:22:57 Ramkumar Chinchani: AI model turf
00:23:51 Ramkumar Chinchani: storage community needs to implement dist spec
00:24:40 Brian Goff (@cpuguy83): If I can't put it on my fat32 formaatted disk I don't want it.
00:25:58 Ramkumar Chinchani: currently dist spec is beginning to chew on storage thingies
00:26:40 Sajay Antony: Thanks for the stickers.
00:27:30 Sajay Antony: I’d ask for the larger logo only sticker. Those were nice.
00:27:34 Syed Ahmed: I have one PR pending approval https://github.com/opencontainers/distribution-spec/pull/595

## February 19, 2026

**Recording**: https://youtu.be/KOf2bj0sbMk

### Attendees:

- Brandon Mitchell
- Tianon
- Shaon Hossain
- Samuel Karp
- Brian Goff
- Sajay Antony

### Actionable Agenda Items:

- Review for irc meeting minutes: <https://github.com/opencontainers/.github/pull/71>
- distribution-spec blob put with invalid range: <https://github.com/opencontainers/distribution-spec/pull/593>
- Docker-Content-Digest header: <https://github.com/opencontainers/distribution-spec/pull/595>

### Presentation/Discussion Agenda Items:

- Updates from Jory:
- Likely regrets from Jory unless she can dial in from the road
- Stickers on the way to interested TOB Members
- There is a new poll out for a meeting date/time to accomodate more TOB Members. Agenda to be proposed on email thread.
- image-spec empty config: <https://github.com/opencontainers/image-spec/pull/1309>
- Progress of supporting other digest algorithms:
- issue: <https://github.com/opencontainers/distribution-spec/issues/494>
- Proposal for a header: <https://github.com/opencontainers/distribution-spec/pull/543>
- Proposal to push multiple tags: <https://github.com/opencontainers/distribution-spec/issues/591>
- Blocking effort to rework conformance tests: <https://github.com/opencontainers/distribution-spec/pull/588>
- Next step in conformance test rewrite is to adjust <https://conformance.opencontainers.org> web page for different categories (API and data types), then GHA jobs need to be reworked.

### Notes:

Notes from the zoom chat:

00:08:24 Brian Goff (@cpuguy83): https://github.com/project-dalec/dalec/blob/f5516996a8426f612d14d4e55650570ff2895c3c/docs/spec.schema.json#L99-L102
00:22:47 Samuel Karp: https://communityinviter.com/apps/opencontainers/join-the-oci-community

## February 12, 2026

**Recording**: https://youtu.be/8-X_xurTJoc

### Attendees:

- Brandon Mitchell
- Samuel Karp
- Tianon
- Brian Goff
- Jeff Carter
- Sajay Antony
- Jory Burson

### Actionable Agenda Items:

- TOB held "simple majority" vote (5/8 present and voting in the affirmative) to have a TOB meeting

### Presentation/Discussion Agenda Items:

- TOB:
- Election results: <https://github.com/opencontainers/tob/issues/148>
- Seat count: <https://github.com/opencontainers/tob/issues/155>
- image.base.source annotation: <https://github.com/opencontainers/image-spec/issues/1308>

### Notes:

Notes from the zoom chat:

00:03:18 Tianon: This Charter may be amended by a two thirds vote of the Technical Oversight Board
00:03:30 Tianon: Replying to "This Charter may be ..." this one's definitely open to interpretation 😂
00:06:30 Jory Burson: hello
00:06:33 Jory Burson: I’m alive
00:07:20 Sajay Antony: Replying to "I’m alive" Glad to have you back Jory.
00:08:58 Tianon: hey, 5/8 TOB members here isn't too bad! I'm impressed 🫶
00:13:12 Tianon: The prefix org.opencontainers is reserved for keys defined in Open Container Initiative (OCI) specifications and MUST NOT be used by other specifications and extensions.
00:16:04 Jory Burson: Monument to your Greatness
00:16:52 Sajay Antony: manifest embedded blobs test eh.
00:22:15 Tianon: https://oci.dag.dev/?image=tianon/test:eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ref https://iliana.fyi/blog/e98e/ (related to Brandon's "aaaaaa")
00:22:41 Tianon: Replying to "https://oci.dag.dev/..." max length on the tag too, because of course it is
00:27:22 Sajay Antony: We love it either way.

## February 5, 2026

**Recording**: https://youtu.be/leBTsXJhkTI

### Attendees:

- Samuel Karp
- Jeff Carter
- Tianon
- Brandon Mitchell
- Sajay Antony
- Ramkumar Chinchani
- Shaon Hossain
- Syed Ahmed

### Actionable Agenda Items:

- distribution-spec blob put with invalid range: <https://github.com/opencontainers/distribution-spec/pull/593>
- Docker-Content-Digest header: <https://github.com/opencontainers/distribution-spec/pull/595>

### Presentation/Discussion Agenda Items:

- image-spec platforms: <https://github.com/opencontainers/image-spec/pull/1305>
- Licensing headers: <https://github.com/opencontainers/tob/issues/151>
- LF needed:
- TOB election status: <https://github.com/opencontainers/tob/issues/148>

### Notes:

Notes from the zoom chat:

00:09:28 Brandon Mitchell: https://github.com/opencontainers/image-spec/pull/1305
00:11:02 Sajay Antony: Replying to "https://github.com/o..." +1 on your response
00:11:33 Tianon: I should probably footnote that comment with the fact that for all of my personal builds of anything containerd-adjacent, I patch that normalization code to be explicit about v8 for arm64 because implicit values suck, especially when they're embedded in an image
00:12:33 Tianon: https://github.com/containerd/platforms/blob/2e51fd9435bd985e1753954b24f4b0453f4e4767/database.go#L76

## January 29, 2026

**Recording**: https://youtu.be/XEFNm7yyoAY

### Attendees:

- Brandon Mitchell
- Tianon
- Syed Ahmed
- Derek McGowan
- Jeff Carter
- Samuel Karp
- Brian Goff
- Shaon Hossian
- Sajay Antony

### Actionable Agenda Items:

- Review needed to archive minutes: <https://github.com/opencontainers/.github/pull/68>
- distribution-spec cancel endpoint: <https://github.com/opencontainers/distribution-spec/pull/594>
- distribution-spec blob put with invalid range: <https://github.com/opencontainers/distribution-spec/pull/593>

### Presentation/Discussion Agenda Items:

- Docker-Content-Digest header:
- <https://github.com/opencontainers/distribution-spec/pull/595>
- Context: <https://github.com/opencontainers/distribution-spec/pull/543#discussion_r2693119425>
- LF needed:
- TOB election status: <https://github.com/opencontainers/tob/issues/148>
- Licensing headers are inconsistent: <https://github.com/opencontainers/tob/issues/151>

### Notes:

Notes from the zoom chat:

00:07:41 Shaon Hossain: +1 calendar year
00:10:45 Tianon: I'd probably say "reasonably" instead of "safely" but that's some very fine hair splitting
00:11:18 Sajay Antony: Do we say anywhere its "algo:digest" ?
00:11:27 Sajay Antony: or just digest
00:12:25 Tianon: Replying to "Do we say anywhere i..." https://github.com/opencontainers/image-spec/blob/v1.1.1/descriptor.md#digests (not sure if the dist-spec references this explicitly, but if not, it probably should)
00:14:08 Sajay Antony: Replying to "Do we say anywhere i..." Great there is a big header "Digests" 🙂
00:14:45 Tianon: Replying to "Do we say anywhere i..." - **Digest**: a unique identifier created from a cryptographic hash of a Blob's content. Digests are defined under the OCI Image Spec ^{[apdx-3](#appendix)}
00:14:48 Tianon: Replying to "Do we say anywhere i..." in the dist-spec
00:15:15 Tianon: Replying to "Do we say anywhere i..." and: | apdx-3 | [OCI Image Spec - digests](https://github.com/opencontainers/image-spec/blob/v1.0.1/descriptor.md#digests) | Description of digests, defined by the OCI Image Spec |
00:16:18 Brian Goff (@cpuguy83): If it compiles the first time then worry.
00:20:26 Sajay Antony: Good day folks

## January 22, 2026

**Recording**: https://youtu.be/36OCFqQQj_o

### Attendees:

- Brandon Mitchell
- Mike Brown
- Tianon
- Jeff Carter
- Syed Ahmed
- Brian Goff
- Ramkumar Chinchani
- Sajay Antony
- Shaon Hossain

### Actionable Agenda Items:

None.

### Presentation/Discussion Agenda Items:

- Docker-Content-Digest header:
- <https://github.com/opencontainers/distribution-spec/pull/595>
- Context: <https://github.com/opencontainers/distribution-spec/pull/543#discussion_r2693119425>
- Accept/Content-Type negotiation:
- <https://github.com/opencontainers/distribution-spec/issues/596>
- TOB election status: <https://github.com/opencontainers/tob/issues/148>
- Licensing headers are inconsistent: <https://github.com/opencontainers/distribution-spec/pull/589#issuecomment-3774778393>

### Notes:

Notes from the zoom chat:

00:06:44 Ramkumar Chinchani: MUST - pay attention, ignore everything else
00:26:52 Ramkumar Chinchani: Any trademark issues with Docker-* strings? past, present and future? or was that part of the donation/open-sourcing?
00:32:48 Brian Goff (@cpuguy83): Oh wow, I never realized that.
00:33:13 Tianon: Replying to "Oh wow, I never real..." only ever bumped into it on accident, never on purpose lol (but it was a "compatibility" feature)
00:33:36 Brian Goff (@cpuguy83): Replying to "Oh wow, I never real..." I remember the v1 manifest thing being the default return and you had to ask for v2... is that this?
00:34:07 Brian Goff (@cpuguy83): Replying to "Oh wow, I never real..." Ah yeah, that's this.
00:34:18 Tianon: Replying to "Oh wow, I never real..." part of this - the other half was unwrapping an index if your Accept header wasn't big enough
00:34:19 Brian Goff (@cpuguy83): Replying to "Oh wow, I never real..." When I hit that I was like wtf is going on.
00:41:55 Tianon: https://github.com/tianon/oci-schema1
00:45:57 Sajay Antony: Folks need to drop for another call.
00:48:58 Jeff Carter: I’ll ask Claude to summarize it for me
00:54:32 Shaon Hossain: We want some snow! Ski resorts are suffering from lack of snow this year
00:54:39 Shaon Hossain: (In Seattle)
00:54:53 Tianon: Canada? "Northern USA" 😂
00:55:06 Brian Goff (@cpuguy83): I've never seen even 1ft, I don't think.
00:55:14 Tianon: Replying to "Canada? "Northern US..." "that's bait!"

## January 15, 2026

**Recording**: https://youtu.be/HOmrzEpH-jk

### Attendees:

- Tianon
- Brandon Mitchell
- Shaon Hossain
- Syed Ahmed
- Brian Goff
- Samuel Karp
- Ramkumar Chinchani
- James Kolb
- Jeff Carter
- Mike Brown

### Actionable Agenda Items:

- Ready for review:
- distribution-spec blob put with an invalid range: <https://github.com/opencontainers/distribution-spec/pull/593>
- distribution-spec blob upload cancel endpoint: <https://github.com/opencontainers/distribution-spec/pull/594>

### Presentation/Discussion Agenda Items:

- TOB election status, need LF
- Are licensing headers needed: <https://github.com/opencontainers/distribution-spec/pull/589>, need LF
- There is no way to add referrers to tagged content in a backwards compatible way that also supports alternative digests
- <https://github.com/opencontainers/distribution-spec/pull/543#discussion_r2693119425>
- The distribution project no longer depends on the Accept header, returning the manifest even if no Accept header is provided.
- The content negotiation doc is being ignored: <https://github.com/opencontainers/distribution-spec/blob/v1.1.1/content-negotiation.md>
- OCI could require RFC 9530: <https://datatracker.ietf.org/doc/rfc9530/>
- Reviewed the removal of the OCI headers in <https://github.com/opencontainers/distribution-spec/issues/207> and <https://github.com/opencontainers/distribution-spec/pull/208>
- Syed planning to open a PR for better supporting a digest header

### Notes:

Notes from the zoom chat:

00:06:22 Ramkumar Chinchani: GH enabled the "Agents" tab
00:14:14 Ramkumar Chinchani: https://github.com/opencontainers/distribution-spec/issues/409
00:17:46 Ramkumar Chinchani: security = image protected by signatures?
00:23:03 Jeff Carter: https://github.com/opencontainers/distribution-spec/pull/208
00:49:36 Brian Goff (@cpuguy83): Let me sneek in some blake3 digests just to mess things up.
00:49:50 Mike Brown: 🙂
00:50:40 Mike Brown: panic will arrive soon.. see quantum hardware release schedules
00:51:18 Brian Goff (@cpuguy83): https://datatracker.ietf.org/doc/rfc9530/
00:52:12 Tianon: Replying to "https://datatracker...." that's adorable
00:52:42 Tianon: Replying to "https://datatracker...."

   Content-Digest: \
     sha-256=:d435Qo+nKZ+gLcUHn7GQtQ72hiBVAgqoLsZnZPiTGPk=:,\
     sha-512=:YMAam51Jz/jOATT6/zvHrLVgOYTGFy1d6GJiOHTohq4yP+pgk4vf2aCs\
     yRZOtw8MjkM7iw7yZ/WkppmM44T3qg==:

00:52:45 Tianon: Replying to "https://datatracker...." I love it
00:53:39 Ramkumar Chinchani: Replying to "panic will arrive so..." asymmetric crypto most affected. hashes and symmetric crypto mostly fine.
00:54:29 Mike Brown: Replying to "https://datatracker...." this
00:55:59 Ramkumar Chinchani: FIPS-140 excludes blake3
00:57:53 James Kolb: https://pulp.plan.io/issues/4646

## January 8, 2026

**Recording**: https://youtu.be/r13LWCA6FKA

### Attendees:

- Tianon
- Alexander Kanevskiy
- Brandon Mitchell
- Derek McGowan
- Shaon Hossain
- Samuel Karp
- Jeff Carter
- Brian Goff
- Sajay Antony
- Brady Pratt
- Syed Ahmed

### Actionable Agenda Items:

- PR still needed for blob PUT with an invalid range: <https://github.com/opencontainers/distribution-spec/issues/590> (assigned to Brandon)
- Review for PR 1296 <https://github.com/opencontainers/runtime-spec/pull/1296> (all suggestions and requested changes addressed)

### Presentation/Discussion Agenda Items:

- `.wh.` file handling: <https://github.com/opencontainers/image-spec/issues/1301>
- Are licensing headers needed: <https://github.com/opencontainers/distribution-spec/pull/589>
- Pushing multiple tags: <https://github.com/opencontainers/distribution-spec/issues/591>
- TOB election status

### Notes:

Notes from the zoom chat:

00:01:30 Tianon: just had a power blip which hopefully wasn't a harbinger of outages to come lol
00:12:09 Brandon Mitchell: Sam needs a new mic.
00:12:18 Samuel Karp: do I sound like a robot?
00:12:23 Brandon Mitchell: Yup
00:12:45 Samuel Karp: maybe a zoom thing? this is using my normal mic...
00:14:34 Brian Goff (@cpuguy83): Its all static, have you tried replugging?
00:17:24 Brian Goff (@cpuguy83): *on purpose*
00:19:44 Samuel Karp: it's usb, so I won't try until I drop this call because I don't want the device to disappear while I'm here
00:20:33 Derek McGowan: I think containerd will hit this case https://github.com/containerd/containerd/blob/main/pkg/archive/tar.go#L813
00:28:25 Tianon: "copyright of theseus" is a cursed thought I've had related to this discussion and I'm thrilled to see it's nowhere near original: https://opensource.stackexchange.com/a/4347/40765
00:34:32 Samuel Karp: https://opensource.google/documentation/reference/releasing/authors?hl=en
00:44:17 Sajay Antony: Did you have some rough number of max tags you want to support per put? Don't want different implementors to have different limits.
00:47:49 Brian Goff (@cpuguy83): "If you want a guarentee use digests" -- I keep telling people that, but they won't do it.
00:47:50 Tianon: Replying to "Did you have some ro..." maybe URL path less than 2000 characters? 😂 (https://stackoverflow.com/a/417184/433558 is cute and I think we've discussed this problem in OCI before but maybe I'm mis-remembering)
00:48:23 Tianon: Replying to ""If you want a guare..." "if you want immutable images, that's literally what pull-by-digest is designed for" is a set of words I retype on a regular basis
00:49:40 Brian Goff (@cpuguy83): Oh, Tianon will try it, I'm sure.
00:50:10 Tianon: 10 lmao
00:50:23 Tianon: Replying to "10 lmao" low enough that it's almost not worth doing the feature

## January 1, 2026

Canceled for New Years Day.

## Archived Meeting Notes

<https://github.com/opencontainers/.github/blob/main/meeting-notes/>

## Template

## Meeting Date

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### Notes:

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