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ERPSeptember 202613 min read

AI-Assisted Legacy ERP Refactor With No Written Spec

The module was nine hundred lines and its only specification was a commit message from 2017. Here is the method that survives that: characterisation tests first, then seams, then narrow agent-led extractions, and the four modules an agent never touches alone.

AISeptember 202612 min read

AI Code Review as a CI Merge Gate: What Should Block

An AI reviewer takes an afternoon to add to CI and months to calibrate, and the calibration is the whole problem. Here is the split between blocking and advisory findings, the shadow-mode measurement that earns a class the right to block, and the rule that takes it away again.

Software DevelopmentSeptember 202612 min read

AI-Generated Tests: Coverage Rose, Mutation Score Did Not

An agent asked to write tests reads the implementation and asserts what it currently does, which is why the suite is green before you have read a line of it. Here are the four shapes those tests take, the mutation testing run that exposes them, what that run honestly costs, and the prompt change that stops producing them.

Software DevelopmentSeptember 202612 min read

Bundling LSP Servers in a Claude Code Plugin, and Its Cost

A plugin can declare language servers, which changes what the agent knows about your code: it can ask for a definition instead of guessing from a grep. Here is the declaration, which servers are worth bundling, and what four of them actually cost.

DevOpsSeptember 202611 min read

Claude Code Plugin Upgrades: Version Pinning and Rollback

A plugin upgrade does not break the build. It changes how the agent behaves, silently, mid-sprint. How to pin a version, notice a move, and roll back.

AISeptember 202613 min read

Context Engineering for AI Coding Agents in a Monorepo

A monorepo defeats naive agent context in a specific way. How to scope instruction files by directory, activate skills by glob, and delegate fan-out search to a subagent.

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