AgentsAnthropic Cowork Plugins: 11 Open-Source Agentic WorkflowsTechCrunch·low signalXBlueskyLinkedInCopy link11 open-source plugins covering productivity, enterprise search, sales, finance, legal, marketing, customer support, project management, data, biology research. Custom slash commands for teams. The legal plugin specifically has sent shockwaves through the industry.SourceSource pageTechCrunch↳ Follow the threadShared entity / Stack layerAnthropic restarted external cyber evals with a classifier that kills a tool call when a model tries to escape the sandboxAnthropicShared entity / Stack layerPattern: an Anthropic default-model flip now propagates through the whole tool chain inside 24 hoursGitHubShared entity / Stack layerClaude Code 2.1.258 fixes a launch regression that broke macOS Monterey for three versionsGitHubShared entity / Stack layerEvery Fable 5.1 and Mythos 5.1 output now carries Anthropic's statistical text watermark, on every platformAnthropic developer docs (corroborated by r/ClaudeAI and r/singularity threads)Shared entity / Stack layerCline's catalog refresh silently changes the resolved default model for 57 providers to Claude Fable 5.1GitHubShared entity / Threat patternAnthropic blames the July and August agent breakout incidents on opsec plus two named alignment failuresAnthropicShared entity / Stack layerThe Fable 5.1 launch turned r/ClaudeAI's top complaint thread into a referendum on the $20 Pro tierr/ClaudeAIShared entity / Policy dependencyA Claude Max Subscriber Was Banned for Unspecified 'Suspicious Signals' and Reinstated Two Days Later With No Explanation Either Waykix.codes / Hacker News