deps(runner): bump claude-agent-sdk 0.2.128, anthropic 0.120.0

[github-actions]

SDK Version Bump

• claude-agent-sdk: 0.2.124 -> 0.2.128
• anthropic: 0.117.0 -> 0.120.0

TL;DR

• 1 behavior change(s) to review
• 6 new feature(s), 3 bug fix(es)

Behavior Changes

Change	Package	Version	Action
Typed model_usage on ResultMessage	claude-agent-sdk	0.2.126	Review

New Features (6)

Feature	Package	Version	Claude	Gemini	Default	Action
terminal_reason on ResultMessage	claude-agent-sdk	0.2.126	Yes	-	Available	Review
add claude-opus-5 model	anthropic	0.120.0	Yes	-	Available	Review
add tool addition/removal blocks and tool_change events	anthropic	0.120.0	-	-	Available	Review
expand client-side fallback credit token types and add server-side fallbacks...	anthropic	0.120.0	-	-	Available	Review
add new stop reason 'model_context_window_exceeded'	anthropic	0.119.0	-	-	Available	Review
add support for Managed Agents model effort, initial session events, and thre...	anthropic	0.118.0	Yes	-	Available	Review

Bug Fixes (3)

• Fixed premature stdin closure when background tasks are in flight (claude-agent-sdk 0.2.127): query() no longer closes stdin on the first result frame when background tasks (e.g. run_in_background: true su...
• tools (anthropic 0.119.0): handle binary files in agent toolset read/edit (fix: update E2E tests for UI revamp and fix vanilla k8s dialog bug #283)
• aws (anthropic 0.117.1): handle credentials correctly when using AnthropicAWS.copy()

Bundled Claude CLI Versions (4)

SDK Version	CLI Version
0.2.128	2.1.220
0.2.127	2.1.219
0.2.126	2.1.218
0.2.125	2.1.217

Internal changes: claude-agent-sdk (4)

• Updated bundled Claude CLI to version 2.1.220 (0.2.128)
• Updated bundled Claude CLI to version 2.1.219 (0.2.127)
• Updated bundled Claude CLI to version 2.1.218 (0.2.126)
• Updated bundled Claude CLI to version 2.1.217 (0.2.125)

Internal changes: anthropic (1)

• codegen related update (0.117.1)

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Automated by .github/workflows/sdk-version-bump.yml

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Merge Queue Status

• ✅ Entered queue — 2026-07-28 09:14 UTC · Rule: default · triggered by rule autoqueue
• ✅ Checks skipped · PR is already up-to-date
• ✅ Merged — 2026-07-28 09:14 UTC · at 0aee46f0597c55354007cd8d974fbb773707f26a · squash

This pull request spent 14 seconds in the queue, including 2 seconds running CI.

Required conditions to merge

• github-review-approved [🛡 GitHub repository ruleset rule protect-main] (documentation)
  • deps(runner): bump claude-agent-sdk 0.2.128, anthropic 0.120.0 #1725

[github-actions]

⚠️ SDD Preflight — Managed Paths Modified

This PR modifies files in SDD-managed component(s). These components are migrating to Spec-Driven Development.

File	Component	Mode
components/runners/ambient-runner/pyproject.toml	runner	warn
components/runners/ambient-runner/uv.lock	runner	warn

No action required — these components are in warn mode. Consider using the component's agent workflow for future changes.

📖 Specs: Runner Spec · Runner Constitution