#agent-skills

Update GPT-6 Astra skills, AGENTS.md and task prompts with a practical audit, clear completion criteria and a rollout plan for multiple projects.

A census of free writing skills and prose linters for coding agents. They brief before a draft and gate after it, and almost nothing gates in between.

JetBrains reports 83% faster, 64% cheaper and 63% fewer tool calls for its refactoring skill. The disclosure is unusually good; the scope is one harness.

Anthropic moved five Claude Developer Platform betas to GA on August 19, 2026. None of it is a forced migration, and no sunset date is published.

GitHub's August 12 changelog puts Agent Plugins 1.0 support at general availability. What ported across harnesses, and what a plugin still cannot carry.

Vercel's skill packs bundle agent skills behind one install command and an update command, with no versioning, checksums or provenance documented.

Codex CLI 0.147.0 imports Cursor-managed skills and syncs imported Claude and Cursor conversations. What is actually portable across agent harnesses now.

Agent Plugins 1.0 packages skills and MCP servers in one directory format. The spec is still marked Working Draft, and vendor-specific formats keep shipping.

Muse Code fans work out to a git worktree per subagent — opt-in, in git repos — records every step in an append-only event log, and ships four built-in skills.

Visual Studio's July 2026 update ships an Agent (Preview) built on the GitHub Copilot SDK — the same SDK behind the Copilot CLI. What teams can build now.

GitHub made Copilot code review's agent skills and MCP connections generally available on July 29, one day after the MCP spec shipped. A rollout checklist.

Claude Managed Agents added per-agent effort levels, deeper webhooks, session seeding, and thread event previews on July 22, with up to 500 skills per session.

OpenAI Codex v26.616 watches a macOS workflow once and writes a reusable SKILL.md you run on demand. Six tasks to record first, plus the launch catches.

Master Claude Skills across Claude.ai, Claude Code, and the API with SKILL.md structure, progressive disclosure, and deployment scopes.