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●2.1.269 — A broad release with 98 CLI changes. The one worth your attention is claude plugin eval, which finally lets you measure whether a plugin earns its place●EVAL — Every case runs three times with the plugin loaded and three times without, so the number you get back is the difference the plugin makes, not just a pass or a fail●GRADER — Three kinds of grader are available: a regex over the reply, a check for whether a particular tool was called, and a rubric judged by a second model●DIFF — The Bash tool result now includes a diff of the files a command changed. Turn it on with bashEditDiffEnabled●STYLE — /output-style [name] lists and switches output styles, including over Remote Control and in cloud or headless sessions●OTEL — OTEL_METRICS_INCLUDE_REPOSITORY tags metrics and events with vcs. repository attributes, and commit events carry vcs.ref.head●2.1.269 — A broad release with 98 CLI changes. The one worth your attention is claude plugin eval, which finally lets you measure whether a plugin earns its place●EVAL — Every case runs three times with the plugin loaded and three times without, so the number you get back is the difference the plugin makes, not just a pass or a fail●GRADER — Three kinds of grader are available: a regex over the reply, a check for whether a particular tool was called, and a rubric judged by a second model●DIFF — The Bash tool result now includes a diff of the files a command changed. Turn it on with bashEditDiffEnabled●STYLE — /output-style [name] lists and switches output styles, including over Remote Control and in cloud or headless sessions●OTEL — OTEL_METRICS_INCLUDE_REPOSITORY tags metrics and events with vcs. repository attributes, and commit events carry vcs.ref.head
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refactoring

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⟐ Claude Code/2026-07-03Advanced

When a Claude Code Refactor Passes Every Test but Behaves Differently in Production — Catching Silent Contract Drift with a Behavior Diff Harness

Hand Claude Code a large refactor and your tests can stay green while production behavior quietly shifts. Here is how I record exception channels, log shape, init order, and return values as a signature, then diff them per commit to catch contract drift before it ships.

⟐ Claude Code/2026-06-30Advanced

Fixing Blurry Wallpapers on New iPhones with Claude Code: Safely Growing a Per-Device Resolution Map

Why wallpapers go blurry or letterboxed on brand-new iPhones, and how to collapse scattered device branches into a single source of truth you can extend in one line — walked through as a real Claude Code refactor with before/after code.

⟐ Claude Code/2026-06-16Advanced

Keeping Large Claude Code Refactors Revertible One Commit at a Time — Field Notes on Checkpoints and Rollback Detection

Hand a big refactor to Claude Code and the speed hides a real cost: review-proof, oversized diffs. Here are the field notes I actually run — declaring checkpoints in a manifest, enforcing commit granularity with a pre-push hook, and tying rollback calls to observability.

⟐ Claude Code/2026-06-12Intermediate

Untangling Android Back-Button Ad Gates: A Parallel, Priority-Ordered Redesign with Claude Code

Nested back-button ad gates fired at the wrong moments. The parallel, priority-ordered redesign we shipped in v2.1.0, with Claude Code, Kotlin, and tests.

⟐ Claude Code/2026-05-26Intermediate

Four Weeks With Claude Code: Driving Xcode Warnings to Zero in an Indie iOS Codebase

An indie iOS developer behind 50M+ downloads pairs with Claude Code for four weeks to clear hundreds of accumulated Xcode warnings. Notes on weekly scope, what to delegate, and the boundary where human judgment still wins.

⟐ Claude Code/2026-04-18Intermediate

Three Months of Cutting Technical Debt in Half with Claude Code — A Practical Record

A three-month hands-on record of tackling accumulated technical debt using Claude Code. Covers visualization, prioritization, and automated refactoring — with real numbers showing what actually changed.

⟐ Claude Code/2026-03-18Intermediate

Test-Driven Refactoring with Claude Code — Safely Modernizing Legacy Code

Learn how to use Claude Code to safely refactor legacy code by adding tests first. Combine TDD principles with AI assistance to eliminate technical debt without breaking existing functionality.