fix: fall back to ccr code when claude CLI is unavailable

[0xApotheosis]

Description

tl;dr: for people like me who use Claude Code via Claude Code Router

When the claude CLI isn't authenticated (e.g. user has no Claude subscription and uses an API key via claude-code-router), the release script's summary generation fails silently and falls back to the raw commit list.

This PR adds ccr code as a fallback for summary generation:

• Refactors the spawn logic into a shared spawnClaude helper
• Checks if ccr is on PATH and prefers it when available
• Falls back to claude CLI if ccr is unavailable or fails
• Improves error output to capture both stdout and stderr (up to 500 chars each) for easier debugging

Issue (if applicable)

N/A

Risk

Zero risk. This only affects how Claude is invoked during release summary generation - no on-chain transactions, wallets, or protocol interactions are affected.

Testing

Engineering

Run the release script with and without a Claude subscription:

• With ccr installed: should use ccr code for summary generation
• Without ccr: should use claude CLI directly as before
• If both fail: falls back to raw commit list as before

Operations

• 🏁 My feature is behind a flag and doesn't require operations testing (yet)

Not user-facing - internal tooling change only.

Screenshots (if applicable)

N/A

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📝 Walkthrough

Walkthrough

The scripts/release.ts file is updated to add the --no-conversation CLI flag when invoking Claude, changing the command arguments to include this flag in the spawned Claude process for the release workflow.

Changes

Cohort / File(s)	Summary
Claude CLI Invocation scripts/release.ts	Added --no-conversation flag to Claude command-line arguments in the runClaude flow.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• feat: ai-powered release summary in yarn release #11970: Introduces the Claude integration in the runClaude flow that this PR modifies by adding the --no-conversation flag to its invocation.

Poem

🐰 A quiet Claude, no chatter required,
One turn only, no back-and-forth fire,
The flag --no-conversation shines bright,
Making releases run just right! 🚀

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The PR title claims to 'fall back to ccr code when claude CLI is unavailable', but the actual change only adds a --no-conversation flag to an existing Claude invocation. The title does not match the changeset.	Update the title to accurately reflect the change, such as 'fix: prevent release script from polluting claude conversation history' (which matches the PR's stated objective).

✅ Passed checks (2 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/release-script-no-conversation

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@scripts/release.ts`:
- Line 242: The spawn invocation in generateReleaseSummary passes an invalid
Claude CLI flag '--no-conversation' which causes the Claude process to fail;
remove '--no-conversation' from the arguments (or replace it with the supported
'--no-session-persistence' if the goal is to avoid saving the session) in the
spawn call that creates the child process (the line using spawn('claude', ['-p',
'--model', 'opus', '--max-turns', '1', ...])) so the Claude CLI runs with only
valid flags.

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ℹ️ Review info

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Review profile: CHILL

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📥 Commits

Reviewing files that changed from the base of the PR and between c257772 and 60bb3b5.

📒 Files selected for processing (1)

• scripts/release.ts