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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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TDD

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⟐ Claude Code/2026-04-26Advanced

Test-Driven Development with Claude Code — A TDD Workflow for the Agent Era

Adding the constraint of 'write tests first' to Claude Code stops the agent's drift and dramatically changes the quality of generated code. Here's the TDD workflow I arrived at after six months of trial and error.

⟐ Claude Code/2026-04-24Advanced

Write the Repro Test Before Delegating Bug Fixes to Claude Code

After watching Claude Code spin its wheels on ambiguous bug reports, I started writing the failing test myself before delegating. This post walks through the design principles, a concrete repro test, and the three-stage workflow I run in production.

⟐ Claude Code/2026-04-17Advanced

From Spec to Production: Spec-Driven Development with Claude Code

Driving tests, implementation, and docs from a YAML spec with Claude Code, plus measured bcrypt 72-byte results where a valid spec still yields broken code.

⟐ 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.