0.7.3 — Community review fixes

Release 0.7.3

Pi Subagent Removal

The Pi adapter no longer depends on or registers pi-subagents. The runtime
wrapper, package resource declarations, type shim, dedicated tests, and default
normal-mode tool entry are removed. Installation no longer pulls in the
subagent package or its exclusive transitive dependencies.

Subagent tools, skills, prompts, and agent definitions must be installed through
a separate extension if needed. Existing independently installed extensions
are not uninstalled. Restart Pi to refresh previously loaded resources.
Other hosts retain their native delegation behavior.

Distribution

All seven public npm packages and the Obsidian plugin use version 0.7.3.
The plugin has no runtime behavior changes in this release.

Verification

Release preparation runs full workspace verification, package dry-runs, and
project documentation validation with a refreshed index. GitHub release CI
builds and attests the Obsidian artifacts. Hosted CI and publication status
must be verified independently after pushing the release tag.