auto-docs: Update Admin API docs for v26.1.8

[vbotbuildovich]

This PR adds the latest OpenAPI spec for version v26.1.8 of the Redpanda Admin API:

npx doc-tools generate bundle-openapi --tag v26.1.8 --use-admin-major-version --surface admin --out-admin admin/admin-v2.yaml

[coderabbitai]

📝 Walkthrough

Walkthrough

The admin/admin-v2.yaml OpenAPI specification file was updated with new metadata values. The x-generated-at timestamp was updated to reflect the generation time as of 2026-01-23T19:28:04.258Z, and the x-redpanda-core-version was incremented from v25.3.5 to v25.3.6. No changes were made to API paths or operation definitions.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• api-docs#31: Updates metadata in admin/admin-v2.yaml including x-generated-at timestamp and version fields.
• api-docs#50: Modifies admin/admin-v2.yaml and updates x-generated-at and x-redpanda-core-version metadata fields.
• api-docs#29: Introduced the v2 OpenAPI spec and updates its metadata fields like x-generated-at and x-redpanda-core-version.

Suggested reviewers

• kbatuigas
• paulohtb6

🚥 Pre-merge checks | ✅ 1 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title mentions version v26.1.8 but the PR objectives and raw summary indicate the actual changes are for v25.3.6, creating a version mismatch.	Update the title to correctly reference v25.3.6, the actual version being documented in this PR.
Description check	⚠️ Warning	The description mentions version v26.1.8 but the PR objectives and file changes indicate this PR is for v25.3.6, creating an inconsistency.	Correct the version number in the description to v25.3.6 to match the actual changes and PR objectives.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
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🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch auto-docs/admin-api

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[github-actions]

🚨 Breaking Redpanda/admin (branch: v2) API change detected

Preview documentation

Structural change details

Modified (9)

• POST /redpanda.core.admin.v2.SecurityService/CreateScramCredential
  • Content type modified: application/json
    • Property modified: scramCredential
      • Property added: passwordSetAt
• POST /redpanda.core.admin.v2.SecurityService/UpdateScramCredential
  • Content type modified: application/json
    • Property modified: scramCredential
      • Property added: passwordSetAt
• POST /redpanda.core.admin.v2.ShadowLinkService/CreateShadowLink
  • Content type modified: application/json
    • Property modified: shadowLink
      • Property modified: configurations
        • Properties modified: clientOptions, consumerOffsetSyncOptions, securitySyncOptions, topicMetadataSyncOptions
        • [Breaking] Property modified: shadow_schema_registry_topic
          • Name is no longer schemaRegistrySyncOptions [Breaking]
      • Property added: status
  • Response modified: 200
    • Content type modified: application/json
      • Property modified: shadowLink
        • Properties modified: configurations, status
• POST /redpanda.core.admin.v2.ShadowLinkService/FailOver
  • Response modified: 200
    • Content type modified: application/json
      • Property modified: shadowLink
        • Properties modified: configurations, status
• POST /redpanda.core.admin.v2.ShadowLinkService/GetShadowLink
  • Response modified: 200
    • Content type modified: application/json
      • Property modified: shadowLink
        • Properties modified: configurations, status
• POST /redpanda.core.admin.v2.ShadowLinkService/GetShadowTopic
  • Response modified: 200
    • Content type modified: application/json
      • Property modified: shadowTopic
        • Property modified: status
• POST /redpanda.core.admin.v2.ShadowLinkService/ListShadowLinks
  • Response modified: 200
    • Content type modified: application/json
      • Property modified: shadowLinks
        • Properties modified: configurations, status
• POST /redpanda.core.admin.v2.ShadowLinkService/ListShadowTopics
  • Response modified: 200
    • Content type modified: application/json
      • Property modified: shadowTopics
        • Property modified: status
• POST /redpanda.core.admin.v2.ShadowLinkService/UpdateShadowLink
  • Content type modified: application/json
    • Property modified: shadowLink
      • Property modified: configurations
        • Properties modified: clientOptions, consumerOffsetSyncOptions, securitySyncOptions, topicMetadataSyncOptions
        • [Breaking] Property modified: shadow_schema_registry_topic
          • Name is no longer schemaRegistrySyncOptions [Breaking]
      • Property added: status
  • Response modified: 200
    • Content type modified: application/json
      • Property modified: shadowLink
        • Properties modified: configurations, status

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[kbatuigas]

Diffs are due to the implemented allOf workaround for this API. redpanda-data/docs-extensions-and-macros#179 adds a post processing step that will apply the workaround to incoming v2 specs