OpenAPI generation fails on cosmos-sdk v0.53.4: can't resolve OpenAPI name for .cosmos.autocli.v1.ModuleOptions

[chenrui333]

Environment

• Ignite CLI: 29.6.0 (Homebrew formula)
• OS: Linux
• Command under test: ignite s chain mars

What happened

In Homebrew CI, ignite scaffold chain fails during OpenAPI generation with:

failed to generate openapi spec /home/linuxbrew/.cache/Homebrew/go_mod_cache/pkg/mod/github.com/cosmos/cosmos-sdk@v0.53.4/proto, probably you need to exclude some proto files: error while running command go tool github.com/bufbuild/buf/cmd/buf generate /home/linuxbrew/.cache/Homebrew/go_mod_cache/pkg/mod/github.com/cosmos/cosmos-sdk@v0.53.4/proto/cosmos/autocli/v1/query.proto --template=/var/tmp/ignite-test-20260210-166350-8tr8mi/mars/proto/buf.gen.swagger.yaml --output=/var/tmp/gen-openapi-module-spec3599396910 --error-format=json --log-format=json: Failure: plugin go tool github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2: can't resolve OpenAPI name from ".cosmos.autocli.v1.ModuleOptions"
: exit status 1

Reproduction

ignite s chain mars

CI reference

• Homebrew core PR context: go 1.26.0, go@1.25 1.25.7 (new formula) Homebrew/homebrew-core#258912
• Failing job/log: https://github.com/Homebrew/homebrew-core/actions/runs/21880985907/job/63170336076?pr=258912

Expected

ignite s chain mars should complete scaffolding without failing OpenAPI generation for cosmos/autocli/v1/query.proto.

If this is a known upstream breakage, guidance on the recommended workaround for downstream packagers would help (e.g. exclude list, pinned dependency/tooling version, or CLI flag).

[julienrbrt]

We had a fix in v29.7.0, but I see it hasn't been merged: Homebrew/homebrew-core#264724

Can I help bumping the formulae?

[nealsun]

I am using v29.7.0, but i got panic: can't resolve OpenAPI ref from typename ".cosmos.autocli.v1.ModuleOptions when run ignite scaffold module to create new module.

[chenrui333]

We had a fix in v29.7.0, but I see it hasn't been merged: Homebrew/homebrew-core#264724

Can I help bumping the formulae?

I see, yeah, I can help with that.

[chenrui333]

@julienrbrt can you also help pointing the fix for me to better understand? Thanks!

[chenrui333]

@julienrbrt looks like the issue still exists for 29.7.0 bump.

[julienrbrt]

Alright, I'll have a look ASAP.

[chenrui333]

Thanks!

[nealsun]

I am using v29.7.0, but i got panic: can't resolve OpenAPI ref from typename ".cosmos.autocli.v1.ModuleOptions when run ignite scaffold module to create new module.

fix it by change generate_unbound_methods=false in buf.gen.swagger.yaml

[julienrbrt]

Still looking into it. I am having trouble reproducing locally.

$ ignite s chain mars

⭐️ Successfully created a new blockchain 'mars'.
👉 Get started with the following commands:

 % cd mars
 % ignite chain serve

Documentation: https://docs.ignite.com

$ ignite scaffold module bar

modify app/app.go
modify app/app_config.go
create proto/mars/bar/module/v1/module.proto
create proto/mars/bar/v1/genesis.proto
create proto/mars/bar/v1/params.proto
create proto/mars/bar/v1/query.proto
create proto/mars/bar/v1/tx.proto
create x/bar/keeper/genesis.go
create x/bar/keeper/genesis_test.go
create x/bar/keeper/keeper.go
create x/bar/keeper/keeper_test.go
create x/bar/keeper/msg_server.go
create x/bar/keeper/msg_update_params.go
create x/bar/keeper/msg_update_params_test.go
create x/bar/keeper/query.go
create x/bar/keeper/query_params.go
create x/bar/keeper/query_params_test.go
create x/bar/module/autocli.go
create x/bar/module/depinject.go
create x/bar/module/module.go
create x/bar/module/simulation.go
create x/bar/types/codec.go
create x/bar/types/errors.go
create x/bar/types/expected_keepers.go
create x/bar/types/genesis.go
create x/bar/types/genesis_test.go
create x/bar/types/keys.go
create x/bar/types/params.go
create x/bar/types/types.go

🎉 Module created bar.

$ ignite version
Ignite CLI version:		v29.7.0-dev
Ignite CLI build date:		2026-01-27T11:25:28Z
Ignite CLI source hash:		0211780aa43063bc950f705a3f951228bdaaf7ce
Ignite CLI config version:	v1
Cosmos SDK version:		v0.53.5
Buf.build version:		1.65.0
Your OS:			linux
Your arch:			amd64
Your go version:		go version go1.25.7 X:nodwarf5 linux/amd64
Your uname -a:			Linux fedora 6.18.8-200.fc43.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Jan 30 20:23:28 UTC 2026 x86_64 GNU/Linux
Your cwd:			/home/julien/projects/ignite/playground/mars