What problem does it solve? Keeping a coding agent's context file (such as CLAUDE.md, AGENTS.md, or .github/copilot-instructions.md) in sync with the current Spec Kit feature plan is a manual, error-prone task. This Skill automates updating the managed Spec Kit block so the agent always points at the most recent plan. ## Core Features & Use Cases - Managed Section Updates: Creates, replaces, or appends a delimited Spec Kit block inside the agent context file using configurable start and end markers. - Config-Driven Behavior: Reads .specify/extensions/agent-context/agent-context-config.yml to discover the target context file and marker delimiters. - Automatic Plan Detection: When no plan path is given, the script locates the most recently modified specs/*/plan.md. - Use Case: After generating a new feature plan with Spec Kit, run this Skill so your coding agent's instructions immediately reference the latest plan without hand-editing CLAUDE.md. ## Quick Start Ask the agent to update the coding agent context file with the latest Spec Kit plan by running the update-agent-context script.