fix: keep the git autocommit notice off stdout in the stdio transport

[thecodacus]

Follow-up to #26. On the stdio transport stdout carries the MCP protocol, and the "git autocommit: enabled" startup notice was written with console.log, so with GIT_AUTOCOMMIT=true a plain-text line went out on the protocol stream before the first message.

It now goes to stderr like every other log line in stdio.ts.

Checked by running the stdio server with GIT_AUTOCOMMIT=true and capturing stdout: one stray line before the change, nothing after, and a client handshake lists the tools as usual.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Git autocommit startup confirmations now appear on stderr when Git readiness succeeds.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: 55d45d09-23e5-479b-81e8-b9e8b0d24ec8

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📥 Commits

Reviewing files that changed from the base of the PR and between dfecee9 and aeb9e96.

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📒 Files selected for processing (1)

• packages/server/src/mcp/stdio.ts

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📝 Walkthrough

Walkthrough

When Git autocommit is enabled and Git readiness succeeds, the startup confirmation is written to stderr instead of stdout. The readiness failure path is unchanged.

Changes

stdio output

Layer / File(s)	Summary
Git autocommit success message packages/server/src/mcp/stdio.ts	The success message now uses console.error instead of console.log.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Bug fix

Suggested reviewers: madmoneymike5

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Merge Risk: ⚪ Minimal · up to aeb9e

The Git autocommit confirmation now goes to stderr, leaving stdout available for MCP protocol traffic.

Pre-merge checks · 5

Passed checks (5 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: keeping the Git autocommit notice out of stdout for the stdio transport.
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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