CLAUDE LABJP
VERSION — v2.1.227 landed on August 10 with no new features, just fixes around plan detection and CI behaviorAUTO — Two days remain until August 14, when auto mode becomes the default in Claude Code for Pro, Max, and TeamCI — Bash commands no longer fail across the board under claude-code-action with allowed_non_write_users on GitHub-hosted runnersBILLING — Sessions started with an expired token could misread your plan and nudge Max users toward usage credits; that is now fixedSUNSET — The legacy Workbench and the experimental prompt tool APIs retire on August 17, five days outPRICE — Sonnet 5 promo pricing at $2/$10 per Mtok runs through August 31, moving to $3/$15 on September 1VERSION — v2.1.227 landed on August 10 with no new features, just fixes around plan detection and CI behaviorAUTO — Two days remain until August 14, when auto mode becomes the default in Claude Code for Pro, Max, and TeamCI — Bash commands no longer fail across the board under claude-code-action with allowed_non_write_users on GitHub-hosted runnersBILLING — Sessions started with an expired token could misread your plan and nudge Max users toward usage credits; that is now fixedSUNSET — The legacy Workbench and the experimental prompt tool APIs retire on August 17, five days outPRICE — Sonnet 5 promo pricing at $2/$10 per Mtok runs through August 31, moving to $3/$15 on September 1
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regression detection

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Claude Code1Refactoring1Contract Testing1Observability1Claude API1Opus1automation1prompt design1
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.

API & SDK/2026-06-26Advanced

When the Same Model Name Starts Behaving Differently: A Startup Canary for Unattended Pipelines

An in-place Opus upgrade can change your output, and an unattended publishing pipeline will never notice. Here is a lightweight startup canary that fingerprints behavior, catches drift, and halts the batch — with measured cost and latency.