Official Claude Code plugin that analyzes a legacy codebase, produces an approved modernization plan, builds the new code, and proves the new behavior matches the old through script-checked evidence and independent verification.
Plugin analytics: hooks $.telemetry's two events, so a plugin logs an event or marks a feature's use as a first-party row, sent in batches with the session's own credential.
The security default for organizations. Function hooks give every plugin a say on every event, in chain order, and the plugins a person installs sit in the user tier, beneath the organization's prepend tier and above its append tier. Some of what an organization sets today (its classic hooks, its managed CLAUDE.md and rules, its settings, its MCP allowlist, the deny rules in force on its machines) was never within a person's reach before function hooks; seated outermost, this plugin keeps exactly those out of the user tier's reach and adds no policy of its own. Everything else passes through untouched.
The diff pane as a plugin: /diff opens the session's uncommitted changes beside the transcript, file by file with their hunks, refreshed as Claude edits and runs commands; the first edit opens it where the terminal is wide enough, and a file's ask button rides its hunks on the next prompt.
Official Anthropic plugin that loads AGENTS.md the way Claude Code loads CLAUDE.md, via one instructionFiles option with four modes: claude-md, claude-md-or-agents-md (default), claude-md-and-agents-md, and managed-only.