Effort Levels, Session Versioning, and initial_events Land in Claude's API Skill
Anthropic updated the claude-api Claude Agent Skill to document five new Managed Agents features, including a model effort level, optimistic-concurrency versioning, and a combined initial_events call.
What it is
A commit to Anthropic's public skills repository, the same collection that includes Claude Agent Skills covered previously, updating the claude-api skill's documentation.
What it does
Adds documentation for an effort field on an agent's model object (agent-configuration only, silently ignored in per-session overrides), an optional version field on agent updates for optimistic concurrency, and an initial_events option on session create that collapses session creation and the first message send into a single call, plus partner pricing and tool-runner corrections.
Why it matters
Anthropic followed up this same commit chain with a Claude Opus 5 update to the claude-api skill, adding Opus 5 as the default model across SDK examples, pricing tables, and migration guidance, and retiring Opus 4.7 fast-mode guidance.
How to use it
Pull the latest claude-api skill from the skills repo or let Claude Code load it on demand when you're working with Managed Agents sessions.
always_allow, always_ask, and Now auto: Claude's Managed Agents Grows a Middle Option
Anthropic's claude-api skill documents a new auto permission policy for Managed Agents that runs low-risk tool calls, denies high-risk ones automatically, and pauses for human approval only when the risk is indeterminate.
A 1,024-Character Limit Just Forced a Skill Rewrite
Anthropic renamed its claude-academy-guide Claude Agent Skill to academy-guide and shortened its description to comply with skill-upload validation rules for custom skills.
claude-api Skill Gets an `upgrade` Subcommand for the 0.x to 1.x SDK Jump
Anthropic's claude-api Claude Agent Skill added an upgrade subcommand that walks a Python project through migrating from the anthropic 0.x SDK to 1.x, including the new httpx2 HTTP layer.