Sync anthropics/claude-code upstream (da80366 → 079dc85, v2.1.77) + add --name flag

[Copilot]

Advances the submodules/anthropic-claude-code pointer to v2.1.77 and exposes the --name / -n CLI flag introduced in v2.1.76.

Submodule

• da80366 (v2.1.70) → 079dc856 (v2.1.77)

SDK surface change

v2.1.76 added -n / --name <name> to set a session display name at startup.

• ClaudeExecArgs: new SessionName property
• ClaudeExec: NameFlag = "--name" constant; emits --name <value> when set

var result = await thread.RunAsync("Summarize the diff", new TurnOptions
{
    // resolved via ClaudeExecArgs.SessionName → --name "My review session"
});

// or directly:
var args = new ClaudeExecArgs
{
    Input = "Summarize the diff",
    SessionName = "My review session",
};

Not changed

• Effort levels (v2.1.72 dropped max): SDK has no effort-level surface — no change needed.
• Opus 4.6 / Sonnet 4.6 models referenced in v2.1.73–v2.1.77: identifiers unverifiable without a live claude CLI; deferred per project policy.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Sync Claude Code upstream changes (da80366 -> f6dbf44)</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: f6dbf44cd5f5a90f8fd2608c13f3d7bcf15bfe6f

• Compare: anthropics/claude-code@da80366...f6dbf44

• Latest commit: anthropics/claude-code@f6dbf44

Changed files (CLI-relevant)

• CHANGELOG.md

Potential CLI flag changes from diff

• --compact
• --continue
• --effort
• --git
• --print

Potential model changes from diff

• claude-code

Potential feature changes from diff

• (no feature tokens detected from diff)

Commits

• 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'.</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 -> f6dbf44) #3

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