Sync Claude Code upstream changes (da80366 -> 6f049b6)

[github-actions]

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: 6f049b620f6066c5246b922dc7360371fe33c826

• Compare: anthropics/claude-code@da80366...6f049b6

• Latest commit: anthropics/claude-code@6f049b6

Changed files (CLI-relevant)

• CHANGELOG.md

Potential CLI flag changes from diff

• --agents
• --compact
• --continue
• --effort
• --git
• --model
• --plugin-dir
• --print
• --resume

Potential model changes from diff

• claude-code
• claude-opus-4-5

Potential feature changes from diff

• (no feature tokens detected from diff)

Commits

• 6f049b6 chore: Update CHANGELOG.md (2026-03-12)
• 45b5430 chore: Update CHANGELOG.md (2026-03-11)
• f6dbf44 chore: Update CHANGELOG.md (2026-03-10)
• 540b61b chore: Update CHANGELOG.md (2026-03-10)
• 00553de chore: Update CHANGELOG.md (2026-03-10)
• 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'.

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