[dependabot:update-planner] Dependency update task for github/gh-aw: close stale Dependabot PRs already resolved on main

[cao-githubnext-gh-aw-cao-write]

Three open Dependabot pull requests target dependency versions that are already present on main. No coding-agent changes are needed; a human with repository write access should close or ask Dependabot to refresh these PRs to keep the queue clean.

Action: This is a human-only blocker/task. It does not need a coding agent; a maintainer with repository write access should review and close these PRs.

Scope

• build(deps): Bump actions/download-artifact from 4.1.8 to 8.0.1 #61108 — actions/download-artifact bump from 4.1.8 to 8.0.1. Repository evidence: all 4 workflow files referencing this action (CWI.yml, cgo.yml, ci.yml, windows-cli-integration.yml) are already pinned to the v8.0.1 SHA (3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c) on main. The PR's own comment thread confirms the author merged main into the branch and found "the merged tree is now identical to main."
• Bump github.com/modelcontextprotocol/go-sdk from 1.7.0 to 1.8.0 #61092 — github.com/modelcontextprotocol/go-sdk bump from 1.7.0 to 1.8.0. Already at v1.8.0 in go.mod/go.sum on main (landed via chore: update planned Go, Actions, and docs dependencies #61774).
• Bump golang.org/x/tools from 0.49.0 to 0.50.0 #61090 — golang.org/x/tools bump from 0.49.0 to 0.50.0. Already at v0.50.0 in go.mod/go.sum on main (landed via chore: update planned Go, Actions, and docs dependencies #61774).
• Bump mermaid from 11.17.2 to 12.0.0 in /docs #61091 — mermaid bump from 11.17.2 to 12.0.0 in /docs. Already at ^12.0.0 in docs/package.json on main (landed via chore: update planned Go, Actions, and docs dependencies #61774).

Acceptance checks

• Each of the four PRs above is closed as superseded/not-planned, or Dependabot is asked (via @dependabot recreate or closing) to refresh/retire them, so the open-PR queue no longer lists resolved work.
• No repository files, branches, or other pull requests are modified as part of resolving this task.

Evidence

• git log -S "mermaid\": \"^12.0.0" -- docs/package.json and git log -S "go-sdk v1.8.0" -- go.mod and git log -S "x/tools v0.50.0" -- go.mod all resolve to commit 9894316e52 ("chore: update planned Go, Actions, and docs dependencies (chore: update planned Go, Actions, and docs dependencies #61774)", merged 2026-09-18), which predates and supersedes PRs Bump github.com/modelcontextprotocol/go-sdk from 1.7.0 to 1.8.0 #61092, Bump golang.org/x/tools from 0.49.0 to 0.50.0 #61090, Bump mermaid from 11.17.2 to 12.0.0 in /docs #61091.
• grep -rn "download-artifact@" .github/workflows/*.yml | grep -v lock.yml on main shows all references already at 3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1, matching PR build(deps): Bump actions/download-artifact from 4.1.8 to 8.0.1 #61108's target version.

Related to #62450

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