MarketsRetool 35 Percent Enterprises Replaced SaaS With Custom BuildsRetool·high signalXBlueskyLinkedInCopy link817-respondent survey shows 35% of enterprises already replaced at least one SaaS tool with custom buildsSourceSource pageRetool↳ Follow the threadPolicy dependency / Stack layerCherry Studio v2.0.9 unifies tool approval into one declarative policy and lets the provider catalog hot-update without an app releaseGitHubStack layer / Threat patternCROSS-CATEGORY: The Guardrail Layer Around Coding Agents Shipped at Four Different Points in the Lifecycle in 48 HoursHacker News Show HN and Product Hunt (2026-08-24 and 2026-08-25)Policy dependency / Stack layerMCP-Universe RL trains tool-use agents by using MCP servers as the RL environment interfacearXivStack layer / ContrastMicrosoft's Agent Lightning v1.0.1 ships an agent skill whose job is optimizing other agents, installed through gh skillGitHubPolicy dependency / Stack layerSMITH Trains Tool Creation and Tool Use in One Policy; a 4B Qwen3 Beats an Untrained 30B Tool-Writer at 79.8 Macro AccuracyarXiv 2608.24571Stack layer / ContrastGradient open-sources a full reinforcement-learning loop for training tool-using research agents with GRPOGitHubPolicy dependency / Stack layerPeakBench separates an agent's dependency planning from its resource scheduling, and finds good planning does not produce safe parallel executionarXivPolicy dependency / Stack layerHalofy ships an open governance layer for agents with identity, policy, provenance, audit and signed erasureGitHub