plan-impact

Included with Lifetime

$97 forever

Codebase impact analysis on a plan file. Annotates overlaps, obsolescence, broken conventions, ripple effects, missed infrastructure.

General

What this skill does

# Codebase Impact Analysis

Review a plan file for codebase-wide impact. Find what the plan misses by examining the broader context — you are the senior developer who knows the codebase and spots implications the plan author didn't see.

Plan file: **$ARGUMENTS**

This skill performs a specialized `plan-cycle-annotate` pass. It only adds notes; it does not run `plan-cycle-review` or `plan-cycle-finalize`.

## What you do

1. Read the plan file entirely.
2. Identify the "Detailed Changes" section.
3. For EACH proposed change:
- Search for **existing code that already does this** (overlap).
- Check if the change **makes existing code obsolete** (dead code).
- Verify the change **follows conventions** (naming, structure, error handling).
- Identify **ripple effects** — what consumes the code being changed?
- Check for **shared infrastructure** the plan should leverage.
- Assess **architectural symmetry** — does it break uniform patterns?
4. For each issue, add an annotation below the relevant section.

**Annotation format:** defined in the ops file's `plan-cycle-annotate` section. Use the `[impact]` prefix: `> **NOTE**: [impact] description and what to address`.

## Threshold

If you find more than 15 issues, stop annotating individual items. Write a single summary annotation at the top of "Detailed Changes":

> **NOTE**: [impact] This plan has significant codebase alignment issues (N found). Consider revisiting. Key themes: [list top 3-4].

At the end, report: how many annotations added and which areas they cover.

Files: 1

Size: 1.8 KB

Complexity: 10/100

Category: General

Source: https://github.com/elmisi/claude-code-automation/tree/main/plugins/plan-cycle/skills/plan-impact

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