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Jeff

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MCP Tool Versioning and Deprecated Tools

MCP Tool Versioning and Deprecated Tools

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What Is the Model Context Protocol?

What Is the Model Context Protocol?

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4 min read
Testing Bulk Endpoint Partial Failure

Testing Bulk Endpoint Partial Failure

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Testing Cache Invalidation Headers

Testing Cache Invalidation Headers

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Testing Webhook Signature Verification

Testing Webhook Signature Verification

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Testing File Upload Size Boundaries

Testing File Upload Size Boundaries

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Testing Backwards-Compatible Additive Changes

Testing Backwards-Compatible Additive Changes

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Testing the Permission Matrix

Testing the Permission Matrix

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Testing Client Timeout Behavior

Testing Client Timeout Behavior

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Testing Concurrent Requests and Race Conditions

Testing Concurrent Requests and Race Conditions

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Testing Pagination Boundaries: Catching Off-by-One Errors

Testing Pagination Boundaries: Catching Off-by-One Errors

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Mocking Correlation IDs for Request Tracing

Mocking Correlation IDs for Request Tracing

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Mocking API Version Negotiation: Headers, Paths, Fallbacks

Mocking API Version Negotiation: Headers, Paths, Fallbacks

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Mocking Region-Specific Latency for Slow-Network Clients

Mocking Region-Specific Latency for Slow-Network Clients

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Mocking Multipart Validation Errors for File Upload Forms

Mocking Multipart Validation Errors for File Upload Forms

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Mocking Token Expiry Based on Clock Time, Not Request Count

Mocking Token Expiry Based on Clock Time, Not Request Count

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Pact vs Prism: Which Contract Mocking Tool Fits?

Pact vs Prism: Which Contract Mocking Tool Fits?

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Mocking a Race Between Two Clients: A Deterministic Approach

Mocking a Race Between Two Clients: A Deterministic Approach

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Mocking GraphQL Partial Data and Errors: A Practical Guide

Mocking GraphQL Partial Data and Errors: A Practical Guide

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What Is Contract Drift Between a Mock and an API?

What Is Contract Drift Between a Mock and an API?

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Duplicate HTTP Headers Sent as an Array: How to Debug Them

Duplicate HTTP Headers Sent as an Array: How to Debug Them

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Why a CORS Preflight OPTIONS Request Returns 401

Why a CORS Preflight OPTIONS Request Returns 401

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503 Service Unavailable: Why It Happens and How to Back Off

503 Service Unavailable: Why It Happens and How to Back Off

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502 Bad Gateway vs 504: How to Tell Them Apart

502 Bad Gateway vs 504: How to Tell Them Apart

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Debugging 423 Locked Resource

Debugging 423 Locked Resource

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Debugging 416 Range Not Satisfiable

Debugging 416 Range Not Satisfiable

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Debugging 411 Length Required with Chunked Input

Debugging 411 Length Required with Chunked Input

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Debugging a 400 Caused by a Trailing Comma in JSON

Debugging a 400 Caused by a Trailing Comma in JSON

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Debugging 429 Bursts and Retry-After

Debugging 429 Bursts and Retry-After

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When an Agent Names Variables After the Ticket Number

When an Agent Names Variables After the Ticket Number

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When an Agent Removes Input Validation and Trusts Callers

When an Agent Removes Input Validation and Trusts Callers

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Why a Green Build Is Not Enough for a Confident Merge

Why a Green Build Is Not Enough for a Confident Merge

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When to Trust the Recommendation and When to Probe

When to Trust the Recommendation and When to Probe

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What to Include in a Review Context Package

What to Include in a Review Context Package

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Verify an API Change With a Real Request, Not a Hunch

Verify an API Change With a Real Request, Not a Hunch

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Validating a Business Flow After an Agent Edit

Validating a Business Flow After an Agent Edit

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Turning a Confirmed Suspicion Into an Agent Handoff

Turning a Confirmed Suspicion Into an Agent Handoff

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Start With the Suspicion, Not the Whole File

Start With the Suspicion, Not the Whole File

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Spotting Scope Creep in an AI-Generated Change

Spotting Scope Creep in an AI-Generated Change

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Reviewing Chained API Changes Across Multiple Steps

Reviewing Chained API Changes Across Multiple Steps

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Request and Response Evidence in a Code Review

Request and Response Evidence in a Code Review

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Pairing Static Flags With a Real Request

Pairing Static Flags With a Real Request

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Keeping a Review Audit Trail With Evidence

Keeping a Review Audit Trail With Evidence

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How to Triage False Suspicions Fast

How to Triage False Suspicions Fast

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How to Prioritize Review Findings by Risk

How to Prioritize Review Findings by Risk

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How Much Context an Agent Needs to Fix a Finding

How Much Context an Agent Needs to Fix a Finding

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From Suspicion to Verified Change: A Closed Loop

From Suspicion to Verified Change: A Closed Loop

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Confidence Gates Before You Merge AI Work

Confidence Gates Before You Merge AI Work

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Checking the Related Context Around a Flagged Line

Checking the Related Context Around a Flagged Line

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A Repeatable Review Routine for Daily AI Commits

A Repeatable Review Routine for Daily AI Commits

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Reviewing a Large AI-Generated Diff Without Reading Every Line

Reviewing a Large AI-Generated Diff Without Reading Every Line

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Why Generated SQL Is Never Auto-Executed

Why Generated SQL Is Never Auto-Executed

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What a Successful Code Scan Does Not Prove

What a Successful Code Scan Does Not Prove

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What a Generated A2A Server Is Not

What a Generated A2A Server Is Not

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Verifying an Agent Card Locally

Verifying an Agent Card Locally

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DDL for MySQL, SQL Server, or Oracle from One Spec

DDL for MySQL, SQL Server, or Oracle from One Spec

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Chaining Requests with Extracted Variables

Chaining Requests with Extracted Variables

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Why an Empty Test Result Is Not a Pass

Why an Empty Test Result Is Not a Pass

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Why AI Fills Gaps but Cannot Invent Routes

Why AI Fills Gaps but Cannot Invent Routes

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When a 200 Response Still Breaks the Contract

When a 200 Response Still Breaks the Contract

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