feat(git): replace Co-Authored-By with Assisted-by trailer

[cblecker]

Summary

• Replace Co-Authored-By trailer with Assisted-by: Claude:<model-id> format, following the Linux kernel's Documentation/process/coding-assistants.rst standard for AI attribution
• Add safety rule: AI must never add Signed-off-by tags (only humans can certify the DCO)
• Bump git plugin version from 1.0.0 to 1.1.0

Test plan

• Run bash git/scripts/git-instructions.sh and verify output contains Assisted-by trailer and Signed-off-by safety rule
• Run bash git/scripts/git-instructions.sh | grep -i co-authored-by and verify no matches
• Run claude plugin validate ./git and verify it passes
• Run npx markdownlint-cli2 --config .markdownlint-cli2.jsonc "git/**/*.md" and verify 0 errors
• Run shellcheck git/scripts/git-instructions.sh and verify no warnings

Summary by CodeRabbit

• Documentation

  • Updated commit message attribution standards with new trailer format
  • Established safety guidelines for commit signing practices

• Chores

  • Plugin version bumped to 1.1.0

[coderabbitai]

Walkthrough

The pull request bumps the Claude plugin version to 1.1.0 and updates AI attribution standards across documentation and scripts, replacing "Co-Authored-By" trailers with "Assisted-by" format per Linux kernel conventions and adding safety rules preventing DCO sign-off additions.

Changes

Cohort / File(s)	Summary
Plugin Version Bump git/.claude-plugin/plugin.json	Updated version field from 1.0.0 to 1.1.0.
Attribution and Safety Standards git/CLAUDE.md, git/scripts/git-instructions.sh	Replaced Co-Authored-By trailers with Assisted-by format (Assisted-by: Claude:). Added safety rule prohibiting Signed-off-by tag additions and removed references to previous Co-Authored-By convention.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• chore(git): bump version to 0.2.1 #6: Modifies git/.claude-plugin/plugin.json to bump the plugin version (metadata-only change).
• feat(git): add task coordination to plugin skills #7: Also updates version in git/.claude-plugin/plugin.json with similar metadata-only changes.

Poem

🐰 A hop and a bound, our Claude takes the stage,
With "Assisted-by" now on the page,
No sign-offs sneaked in, safety rules tight,
Version 1.1 shines ever so bright! 🌟

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: replacing Co-Authored-By with Assisted-by trailer across git plugin files.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/assisted-by-trailer

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[coderabbitai]

🧹 Nitpick comments (1)

git/scripts/git-instructions.sh (1)

181-181: Add the DCO failure path explicitly.

This tells Claude what not to do, but not how to recover when a commit-msg hook or CI requires a sign-off. Add one sentence telling it to stop and ask the human to add Signed-off-by themselves instead of retrying the commit.

Suggested wording

- - NEVER add Signed-off-by tags to commits. Only humans can certify the Developer Certificate of Origin (DCO). The human submitter is responsible for adding their own Signed-off-by tag.
+ - NEVER add Signed-off-by tags to commits. Only humans can certify the Developer Certificate of Origin (DCO). The human submitter is responsible for adding their own Signed-off-by tag.
+ - If a hook or repository policy requires Signed-off-by, stop and tell the user they must add it themselves; do not retry with a generated sign-off.

🤖 Prompt for AI Agents

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

In `@git/scripts/git-instructions.sh` at line 181, Update the guidance line that
reads "NEVER add Signed-off-by tags to commits. Only humans can certify the
Developer Certificate of Origin (DCO). The human submitter is responsible for
adding their own Signed-off-by tag." to explicitly include the DCO failure path:
instruct the agent, when a commit-msg hook or CI reports a missing
Signed-off-by, to stop retrying and prompt the human submitter to add the
Signed-off-by themselves rather than attempting to modify commits; reference the
existing sentence "NEVER add Signed-off-by tags to commits." when making this
single-sentence addition so the behavior is clearly prescribed.

🤖 Prompt for all review comments with AI agents

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

Nitpick comments:
In `@git/scripts/git-instructions.sh`:
- Line 181: Update the guidance line that reads "NEVER add Signed-off-by tags to
commits. Only humans can certify the Developer Certificate of Origin (DCO). The
human submitter is responsible for adding their own Signed-off-by tag." to
explicitly include the DCO failure path: instruct the agent, when a commit-msg
hook or CI reports a missing Signed-off-by, to stop retrying and prompt the
human submitter to add the Signed-off-by themselves rather than attempting to
modify commits; reference the existing sentence "NEVER add Signed-off-by tags to
commits." when making this single-sentence addition so the behavior is clearly
prescribed.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 1dcf572d-290e-4cda-ae82-1669a05ccb45

📥 Commits

Reviewing files that changed from the base of the PR and between 07394d5 and f6a3153.

📒 Files selected for processing (3)

• git/.claude-plugin/plugin.json
• git/CLAUDE.md
• git/scripts/git-instructions.sh