Pi 0.51.3

New Features

• Command discovery for extensions via ExtensionAPI.getCommands(), with commands.ts example for invocation patterns. See docs/extensions.md#pigetcommands and examples/extensions/commands.ts.
• Local path support for pi install and pi remove, with relative path resolution against the settings file. See docs/packages.md#local-paths.

Breaking Changes

• RPC get_commands response and SlashCommandSource type: renamed "template" to "prompt" for consistency with the rest of the codebase

Added

• Added ExtensionAPI.getCommands() to let extensions list available slash commands (extensions, prompt templates, skills) for invocation via prompt (#1210 by @w-winter)
• Added commands.ts example extension and exported SlashCommandInfo types for command discovery integrations (#1210 by @w-winter)
• Added local path support for pi install and pi remove with relative paths stored against the target settings file (#1216)

Fixed

• Fixed default thinking level persistence so settings-derived defaults are saved and restored correctly
• Fixed Windows package installs by resolving npm.cmd when npm is not directly executable (#1220)
• Fixed xhigh thinking level support check to accept gpt-5.2 model IDs (#1209)