Lightweight Implementation Analysis Protocol Skill for Claude
This skill should be used when fixing bugs, implementing features, debugging issues, or making code changes. Ensures understanding of code flow before implementation by: (1) Tracing execution path with specific file:line references, (2) Creating lightweight text diagrams showing class.method() flows, (3) Verifying understanding with user. Prevents wasted effort from assumptions or guessing. Triggers when users request: bug fixes, feature implementations, refactoring, TDD cycles, debugging, code analysis.
Install
one command, takes just this skill from the repositorynpx skills add https://github.com/NTCoding/claude-skillz --skill lightweight-implementation-analysis-protocolThe instruction itself
9 sections, as written by the authorLightweight Implementation Analysis Protocol
Quick understanding before implementation - just enough to guide TDD, no more.
When This Activates
Before creating implementation plans, fix plans, or TDD cycles for bugs/features.
The Protocol (3 Quick Steps)
1. Trace the Flow
Answer these:
- Which event/request triggers this?
- Which file:line handles it?
- Where does the error occur (file:line)?
2. Quick Diagram
Simple class.method() flow with relevant data:
Event: EventName
↓ (contains: relevant fields)
Class.method() [file:line]
↓ (what it does)
Class.method() [file:line] ← 💥 Error here
↓
Result: What happens
Keep it short - 5-10 lines max.
3. Verify
Ask: "Here's the flow: [diagram]. Correct?"
Wait for confirmation, then proceed.
Example
Problem: Email validation failing
Event: user.email.updated
↓ (email: "invalid@")
UpdateUserEmailHandler.execute() [line 281]
↓ (validates email format)
EmailValidator.parse() [line 289] ← 💥 Throws ValidationError
↓
Result: Error response
Current: Throws
Should: Use safeParse(), return validation error
Rules
- Keep it lightweight - This isn't detailed planning, just enough to know what to test
- Be specific - File:line, not abstractions
- Get confirmation - Don't proceed without it
- Skip for trivial changes - Typos, formatting, docs
Anti-Pattern
❌ WRONG: "I'll fix the validation. Here's my plan..."
✅ RIGHT: "Let me trace where the error occurs... [diagram]. Correct?"
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How to use it
Take ntcoding/lightweight-implementation-analysis-protocol from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.