review-delta

name	review-delta
description	Review only changes since last commit using impact analysis. Token-efficient delta review with automatic blast-radius detection.
argument-hint	[file or function name]

Review Delta

Perform a focused, token-efficient code review of only the changed code and its blast radius.

Token optimization: Before starting, call help(topic="graph") for the full actions reference. Use ONLY changed nodes + 2-hop neighbors in context.

Steps

1. Ensure the graph is current by calling graph(action="update").

2. Get review context by calling review(). This returns:

   • Changed files (auto-detected from git diff)
   • Impacted nodes and files (blast radius)
   • Source code snippets for changed areas
   • Review guidance (test coverage gaps, wide impact warnings, inheritance concerns)

3. Analyze the blast radius by reviewing the impacted_nodes and impacted_files in the context. Focus on:

   • Functions whose callers changed (may need signature/behavior verification)
   • Classes with inheritance changes (Liskov substitution concerns)
   • Files with many dependents (high-risk changes)

4. Perform the review using the context. For each changed file:

   • Review the source snippet for correctness, style, and potential bugs
   • Check if impacted callers/dependents need updates
   • Verify test coverage using query(action="query", pattern="tests_for", target=<function_name>)
   • Flag any untested changed functions

5. Report findings in a structured format:

   • Summary: One-line overview of the changes
   • Risk level: Low / Medium / High (based on blast radius)
   • Issues found: Bugs, style issues, missing tests
   • Blast radius: List of impacted files/functions
   • Recommendations: Actionable suggestions

Advantages Over Full-Repo Review

• Only sends changed + impacted code to the model (5-10x fewer tokens)
• Automatically identifies blast radius without manual file searching
• Provides structural context (who calls what, inheritance chains)
• Flags untested functions automatically