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Config Exists
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CodeRabbit Collector

Config Exists + CodeRabbit Collector

✓ Guardrail ↓ Collector Experimental Devex Build And Ci

Enforce Config Exists using data collected by CodeRabbit Collector. Automatically check devex build and ci standards on every PR.

Guardrail: Ensures a CodeRabbit configuration file (.coderabbit.yaml or .coderabbit.yml) exists at the repository root. A config file allows teams to customize review behavior, set path filters, and configure review instructions.
Data Source: Detects CodeRabbit AI code review activity on pull requests by querying GitHub check-runs API, and collects CodeRabbit configuration files. Writes to normalized ai.code_reviewers[] for tool-agnostic policy checks, plus tool-specific data in ai.native.coderabbit.
Get Started View on GitHub

How CodeRabbit Collector Powers This Guardrail

The CodeRabbit Collector gathers metadata from your systems. This data flows into Lunar's Component JSON, where the Config Exists guardrail evaluates it against your standards.

When enabled, this check runs automatically on every PR and in AI coding workflows, providing real-time enforcement with actionable feedback.

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↓ CodeRabbit Collector Gathers Data Collector
Extracts metadata from code, configs, and tool outputs
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{ } Component JSON
Data centralized in structured format for evaluation
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✓ Config Exists Checks Guardrail
Pass/fail result with actionable feedback in PRs

Quick Start Configuration

Add both the collector and policy to your lunar-config.yml to enable this guardrail.

📄 lunar-config.yml 
# Step 1: Enable the CodeRabbit Collector
collectors:
  - uses: github://earthly/lunar-lib/collectors/coderabbit@v1.0.5
    # with: ...

# Step 2: Enable the CodeRabbit Guardrails
policies:
  - uses: github://earthly/lunar-lib/policies/coderabbit@v1.0.5
    include: [config-exists]
    # with: ...

What CodeRabbit Collector Collects

This collector gathers the following data that the Config Exists guardrail evaluates.

Collector code

code-reviewer

Detects CodeRabbit check-runs on pull requests by querying the GitHub check-runs API for the coderabbitai app. Waits for scan completion and writes a normalized entry to ai.code_reviewers[].

Collector code

config

Detects CodeRabbit configuration files (.coderabbit.yaml or .coderabbit.yml) in the repository root. Records config file presence and path.

Example Data Flow

Here's an example of the data that CodeRabbit Collector writes to the Component JSON, which Config Exists then evaluates.

{ } component.json From CodeRabbit Collector 
{
  "ai": {
    "code_reviewers": [
      {
        "tool": "coderabbit",
        "check_name": "coderabbitai",
        "detected": true,
        "last_seen": "2024-01-15T10:30:00Z"
      }
    ],
    "native": {
      "coderabbit": {
        "config_file": ".coderabbit.yaml",
        "config_exists": true
      }
    }
  }
}

Learn More

Guardrail · CodeRabbit Guardrails Config Exists View all compatible integrations
→
Collector CodeRabbit Collector View full documentation
→

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