docs: CLAUDE.md version and MSRV out of sync with v1.5.0 (recurrence of #1044)

[wildcard]

[agent]

Agent: Claude Code (claude-sonnet-4-6) — caro-qa-agent

---

Problem

CLAUDE.md (the project operating contract read by every agent session) shows:

• Version: 1.4.0 (GA) — but the shipped version is 1.5.0
• MSRV: 1.83 — but v1.5.0 bumped MSRV to 1.85 (confirmed in CHANGELOG)

Any agent session opening this file gets wrong version signals, potentially making incorrect decisions about MSRV compatibility or release versioning references.

This is a recurrence of #1044, which caught the same file showing 1.1.0 instead of 1.3.0. That fix updated the banner to 1.4.0 but did not add CLAUDE.md to the release-version-alignment 6-file checklist, so drift recurred.

Reproduction

grep -n "Version\|MSRV" CLAUDE.md
# Line 7: - **Language**: Rust (edition 2021, MSRV 1.83)
# Line 9: - **Version**: 1.4.0 (GA)
caro --version
# caro 1.5.0 (be07b22 2026-07-18)

Expected vs Actual

Expected: Version: 1.5.0 (GA), MSRV 1.85
Actual: Version: 1.4.0 (GA), MSRV 1.83

Environment

• caro version: 1.5.0 (be07b22 2026-07-18)
• OS: Linux 6.18.44-fc-v24 x86_64 (remote sandbox)
• Test date: 2026-09-08
• Backend: CLI not involved (static file check)

Investigation

• CLAUDE.md line 9: **Version**: 1.4.0 (GA) (grep confirmed on main HEAD)
• CLAUDE.md line 7: MSRV 1.83
• CHANGELOG.md [1.5.0]: "MSRV bumped from 1.83 → 1.85"
• caro --version: caro 1.5.0

Fix direction

1. Update CLAUDE.md: Version 1.4.0 → 1.5.0, MSRV 1.83 → 1.85
2. Add CLAUDE.md to the release-version-alignment 6-file checklist as a 7th file to prevent future recurrence.

Severity

P2 — Agent-facing operating contract carries wrong version/MSRV; may cause subtle mis-decisions in version-gated agent logic.

---

Prompt used to generate this comment

caro QA agent — daily rotation slot A+B+C, scheduled remote run 2026-09-08

[github-actions]

Potential Related Issues

This issue might be related to existing issues:

• docs: CLAUDE.md version banner shows 1.4.0 (GA) instead of 1.5.0 (recurrence of #1044) #1420: docs: CLAUDE.md version banner shows 1.4.0 (GA) instead of 1.5.0 (recurrence of docs: CLAUDE.md version banner shows 1.1.0 (GA) instead of 1.3.0 #1044)
• docs: CLAUDE.md version banner shows 1.4.0 instead of 1.5.0 (recurrence of #1044) #1416: docs: CLAUDE.md version banner shows 1.4.0 instead of 1.5.0 (recurrence of docs: CLAUDE.md version banner shows 1.1.0 (GA) instead of 1.3.0 #1044)
• docs: CLAUDE.md version banner shows 1.4.0 instead of 1.5.0 (recurrence of #1044) #1391: docs: CLAUDE.md version banner shows 1.4.0 instead of 1.5.0 (recurrence of docs: CLAUDE.md version banner shows 1.1.0 (GA) instead of 1.3.0 #1044)

If your issue is a duplicate, please add a comment to the existing issue instead. If it's different, please add more context to help us understand how it differs.

This is an automated check. Please verify the suggestions above.

[github-actions]

🔍 Bug Report Validation

Status: ⏳ Missing Information

Thank you for reporting this bug! To help us investigate effectively, we need a bit more information:

Required Information

• Missing exact command: Please provide the exact command that triggered the bug
• Missing reproduction steps: Please fill in the numbered steps with actual actions

Suggestions

• Consider adding debug logs (RUST_LOG=debug), configuration, or additional context to help us investigate

How to Update

1. Click "Edit" on your original issue description
2. Fill in the missing information
3. Click "Update comment"

The awaiting-response label will be automatically removed once all required information is provided.

Need Help?

If you're unsure about any of these fields:

• Check our QA Process Guide
• Ask in GitHub Discussions
• See example bug reports

This is an automated check to ensure we have the information needed for effective QA investigation. Thank you for helping improve caro! 🙏