chore: sync anthropics/claude-code submodule da80366 → 53a5f3e

[Copilot]

Upstream anthropics/claude-code moved forward by one commit (53a5f3e chore: Update CHANGELOG.md). The only file changed is CHANGELOG.md, which adds the 2.1.71 release notes.

Changes

• Submodule bump: submodules/anthropic-claude-code da80366 → 53a5f3e

SDK impact

None. Diff analysis confirmed:

• No new CLI flags or changed flag semantics
• No new or renamed model identifiers
• No --output-format json/stream-json payload shape changes

The 2.1.71 item mentioning --print ("fixed hanging forever when team agents are configured") is a CLI-internal bug fix with no SDK contract change.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Sync Claude Code upstream changes (da80366 -> 53a5f3e)</issue_title>
<issue_description>

Detected upstream updates in anthropics/claude-code affecting Claude Code CLI surface tracking.

Runtime source of truth for this SDK is the real print-mode CLI contract:

• claude -p --output-format json

• claude -p --output-format stream-json --verbose

• Submodule path: submodules/anthropic-claude-code

• Published CLI package used in CI: @anthropic-ai/claude-code

• Watched branch: main

• Current pinned commit: da80366c484698e6370ad9e8abf121f33f8f79e0

• Latest upstream commit: 53a5f3ee0703c2ab1b6d1dd18d8ab65187f9b8ad

• Compare: anthropics/claude-code@da80366...53a5f3e

• Latest commit: anthropics/claude-code@53a5f3e

Changed files (CLI-relevant)

• CHANGELOG.md

Potential CLI flag changes from diff

• --git
• --print

Potential model changes from diff

• (no model tokens detected from diff)

Potential feature changes from diff

• (no feature tokens detected from diff)

Commits

• 53a5f3e chore: Update CHANGELOG.md (2026-03-07)

Action required

• Pull the new anthropics/claude-code submodule commit into this repository
• Validate latest claude --help output and representative non-interactive runtime behavior
• Re-check claude -p --output-format json and claude -p --output-format stream-json --verbose payload shape
• Sync C# SDK constants/options/models with upstream CLI changes
• Add or update tests for new flags/models/features
• Update docs (README + docs/Features + docs/Architecture if needed)

Opened automatically by scheduled workflow 'Claude Code Upstream Watch'.</issue_description>

<agent_instructions>Check and update code if needed but create just one. Branch and on pr </agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Sync Claude Code upstream changes (da80366 -> 53a5f3e) #2

---

📱 Kick off Copilot coding agent tasks wherever you are with GitHub Mobile, available on iOS and Android.