🤖 Add no-marketing-material policy and directive

[cowboyd]

Motivation

Agent tools often append marketing footers (e.g. "Generated with...",
"Co-Authored-By: ") to commits, PRs, issues, and comments. We are not
being paid for this free advertising, so it should not appear in our project
history.

Approach

• Add a directive to the "Commit and PR conventions" section of AGENTS.md
• Create a new Strict policy at .policies/no-agent-marketing.md with examples
  of compliant and non-compliant content
• Register the policy in .policies/index.md
• Wire the policy into .coderabbit.yaml pre-merge checks so CodeRabbit
  enforces it automatically on PRs

Summary by CodeRabbit

• Documentation

  • Added a new strict policy prohibiting AI tool promotional material (e.g., “Generated with…”, “Co-Authored-By: ”) in commits, PRs, issues, and comments, with examples and a reviewer checklist.

• Chores

  • Introduced automated pre-merge enforcement to detect and reject promotional/attribution content that violates the new policy.

[coderabbitai]

Warning

Ignoring CodeRabbit configuration file changes. For security, only the configuration from the base branch is applied for open source repositories.

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: cf9d3bb8-57ea-478b-b6d9-528000541803

📥 Commits

Reviewing files that changed from the base of the PR and between dd4e93e and 246a732.

📒 Files selected for processing (3)

• .coderabbit.yaml
• .policies/index.md
• .policies/no-agent-marketing.md

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📝 Walkthrough

Walkthrough

Adds a strict “No Agent Marketing” policy and enforces it via pre-merge checks: documentation updated (AGENTS.md, .policies/*) and .coderabbit.yaml now includes a Strict pre-merge check to reject commits/PRs containing agent-marketing material (e.g., "Generated with..." footers or Co-Authored-By: trailers).

Changes

Cohort / File(s)	Summary
Commit/PR guidance AGENTS.md	Inserted a constraint under "Commit and PR conventions" forbidding agent marketing material in commits, PRs, issues, and comments.
Pre-merge enforcement config .coderabbit.yaml	Added a Strict pre_merge_checks.custom_checks entry (Policy Compliance) targeting agent-marketing patterns in commits, PR titles, and PR descriptions.
Policies index .policies/index.md	Added a "No Agent Marketing" policy entry linking to the new policy document.
Policy document .policies/no-agent-marketing.md	New policy file defining prohibited agent-marketing patterns, compliant/non-compliant examples, reviewer checklist, and remediations.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• chore: add strict policy enforcement to CodeRabbit config #155: Modifies .coderabbit.yaml to add/adjust strict pre-merge Policy Compliance checks (similar enforcement config change).
• 🤖 Add gitmoji directive to AGENTS.md #166: Edits AGENTS.md Commit and PR conventions (related documentation area).

Suggested reviewers

• taras
• jbolda

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly references the main change: adding a no-marketing-material policy. It accurately summarizes the primary objective of the PR.
Description check	✅ Passed	The description includes both required sections (Motivation and Approach) with clear, specific details about the problem and the implementation plan.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Policy Compliance	✅ Passed	PR passes Policy Compliance check: documentation-only changes with no violations of Strict or Recommended policies in .policies/index.md

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

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch agentmoji

---

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[coderabbitai]

Actionable comments posted: 3

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.
Inline comments:
In @.coderabbit.yaml:
- Around line 54-57: The policy text for `.policies/no-agent-marketing.md` is
currently vague ("such as") and causes nondeterministic enforcement; update the
rule to list explicit, deterministic match patterns (e.g., exact phrases like
"Generated with", "Generated by", "Created with AI", "Co-Authored-By:
.*\\bAI\\b" and any specific agent names you want banned) and enumerated
exceptions (e.g., allow legitimate human Co-Authored-By trailers formatted as
"Co-Authored-By: Name <email@example.com>" or an explicit "Human co-author"
tag). Replace the vague wording at the rule definition (the policy referenced in
the diff) with these concrete phrases/patterns and a clear exception section so
the pre-merge check can evaluate deterministically at error level.
In @.policies/no-agent-marketing.md:
- Around line 30-32: Three fenced code blocks containing the commit message
"feat(worker): add request batching support" are missing language tags; update
the first commit-only block to use ```gitcommit, update the block that includes
"Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>" to use ```gitcommit as
well, and update the block that contains "(built with Copilot)" to use ```text
so markdownlint recognizes the languages.
- Line 89: Replace the lowercase word "markdown" with the proper noun "Markdown"
in the documentation text — specifically update the table cell containing
"Including AI tool attribution in a markdown link" to "Including AI tool
attribution in a Markdown link" so capitalization is consistent (look for the
exact string "Including AI tool attribution in a markdown link" to locate the
spot).

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 3770458a-bc39-43a5-9ca1-a46731855b99

📥 Commits

Reviewing files that changed from the base of the PR and between b672741 and dd4e93e.

📒 Files selected for processing (4)

• .coderabbit.yaml
• .policies/index.md
• .policies/no-agent-marketing.md
• AGENTS.md