Adds a concise "## Cross-Workspace Context" section to both the
task and project CLAUDE.md seed templates. Teaches the agent to
inspect related workspaces with the new commands before making
changes:
ctask list --all discover all workspaces, including archived
ctask info <workspace> view metadata and status of any workspace
ctask notes <workspace> read another workspace's notes.md
ctask path <workspace> get the filesystem path to inspect files
Closes the v0.5.2 design loop: ctask exposes workspace context
through CLI commands and lets agents consume it themselves. The
seed text is read-only by convention — the section explicitly
asks the agent to treat other workspaces as read-only unless the
user grants modification rights.
Applies to newly created workspaces only. Existing workspaces
keep their current CLAUDE.md (per spec: no retroactive overwrite).
Users with custom seed directories see this only if they update
their seeds.