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 get_docs_section_tool(section_name="review-delta") for the optimized workflow. Use ONLY changed nodes + 2-hop neighbors in context.

Steps

1. Ensure the graph is current by calling build_or_update_graph_tool() (incremental update).

2. Get review context by calling get_review_context_tool(). 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)
   • Tip: call with summary_only=True first on large diffs to see scope (counts only, <1 KB), then without it for full details
   • Doc-only commits (.md, .txt, .yaml, .json, etc.) return code_changes: 0 immediately with no snippets — no wasted tokens

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_graph_tool(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