Sync Claude Code upstream changes (da80366 -> b4fa5f8)

[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: b4fa5f85f3d2e02b47f67ab2e348ce6101fb7b5a

• Compare: anthropics/claude-code@da80366...b4fa5f8

• Latest commit: anthropics/claude-code@b4fa5f8

Changed files (CLI-relevant)

• CHANGELOG.md
• scripts/comment-on-duplicates.sh
• scripts/edit-issue-labels.sh

Potential CLI flag changes from diff

• --add-label
• --agents
• --bare
• --base-issue
• --channels
• --compact
• --console
• --continue
• --effort
• --git
• --issue
• --json-schema
• --mcp-config
• --model
• --name
• --plugin-dir
• --potential-duplicates
• --print
• --remove-label
• --resume
• --settings
• --verbose
• --worktree

Potential model changes from diff

• claude-cli
• claude-code
• claude-opus-4-5

Potential feature changes from diff

• (no feature tokens detected from diff)

Commits

• b4fa5f8 chore: Update CHANGELOG.md (2026-04-01)
• 66ab4ae chore: Update CHANGELOG.md (2026-03-31)
• 4411cba Read issue number from workflow event in helper scripts (#40969) (2026-03-31)
• 2d5c1ba chore: Update CHANGELOG.md (2026-03-30)
• 78a44f1 chore: Update CHANGELOG.md (2026-03-29)
• 2923bc8 chore: Update CHANGELOG.md (2026-03-27)
• f75b613 chore: Update CHANGELOG.md (2026-03-26)
• a0d9b87 chore: Update CHANGELOG.md (2026-03-26)
• a542f1b chore: Update CHANGELOG.md (2026-03-25)
• cada21c chore: Update CHANGELOG.md (2026-03-25)
• 6aadfbd chore: Update CHANGELOG.md (2026-03-20)
• 1653669 chore: Update CHANGELOG.md (2026-03-19)
• 5e34f19 chore: Update CHANGELOG.md (2026-03-18)
• a3d9426 chore: Update CHANGELOG.md (2026-03-17)
• 079dc85 chore: Update CHANGELOG.md (2026-03-17)
• 420a188 chore: Update CHANGELOG.md (2026-03-14)
• 48b1c6c chore: Update CHANGELOG.md (2026-03-13)
• db8834b feat(code-review): pass confirmed=true when posting inline comments (2026-03-11)
• 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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