feat(ci): add wandaspecs for local discovery

[andrew-anyscale]

Pre-req to local wheel+image building using Wanda. This will allow spec discovery to source pre-req images for the wheel.

Topic: wanda-specs
Relative: refac-names
Signed-off-by: andrew andrew@anyscale.com

[andrew-anyscale]

Reviews in this chain:
└#60596 refactor(ci): Unique env name for images
　└#60563 feat(ci): add wandaspecs for local discovery
　　└#60564 feat(build): add container-resource-utils
　　　└#60565 feat(build): add build-wheel.sh script for local wheel generation

[andrew-anyscale]

#	head	base	diff	date	summary
0	1a87b8b8	23402617	diff	Jan 28 8:22 AM	1 file changed, 10 insertions(+)
1	6f419104	23402617	diff	Jan 28 9:45 AM	1 file changed, 5 insertions(+), 1 deletion(-)
2	bce35700	742e9a61	diff	Jan 29 18:25 PM	1 file changed, 1 insertion(+), 5 deletions(-)

[gemini-code-assist]

Code Review

This pull request introduces a .wandaspecs configuration file to enable local discovery of Wanda specs for building wheels and images. The change is straightforward, adding a single file that points to the ci/docker/ directory where .wanda.yaml spec files are located. The new file is well-commented, explaining its purpose and the behavior of the Wanda tool. The change appears correct and aligns with the goal described in the pull request. I have reviewed the changes and found no issues.

[aslonnie]

I thought we support dir scanning? why does this need to be specific filenames?

[andrew-anyscale]

See PR description:

Right now, using as an allow-list due to images conflicting with the same name:
[2026-01-28T16:38:16Z] 2026/01/28 16:38:16 build dep graph: load deps: discover specs in ci/docker/: multiple specs have name "corebuild-py3.10": ci/docker/core.build.wanda.yaml, ci/docker/llm.build.wanda.yaml, ci/docker/ml.build.wanda.yaml, ci/docker/rllib.build.wanda.yaml
[2026-01-28T16:38:16Z] 🚨 Error: The command exited with status 1

It's because the wanda files raised in the error message all share the same name attribute of name: "$IMAGE_TO", so spec discovery cannot successfully tie a single name -> Wanda Spec. This property is required, since the discovery uses the name to resolve building pre-req images of form cr.ray.io/rayproject/{name}

I'll need to either revisit that requirement for discovery, or refactor those wandafiles to have differing names (at the very least environment variables)

ray/ci/docker/core.build.wanda.yaml

Lines 1 to 2 in 48c15d1

	name: "$IMAGE_TO"
	froms: ["$IMAGE_FROM"]

ray/ci/docker/llm.build.wanda.yaml

Lines 1 to 2 in 48c15d1

	name: "$IMAGE_TO"
	froms: ["$IMAGE_FROM"]

[andrew-anyscale]

performed the refactor at #60596