DeepSeek Harness (DSH) plugin: a read-only ledger for the plugins you already have installed — a capability inventory with file:line evidence, declared-vs-detected reconciliation, cross-profile version drift, and a diff of what changed since the last scan.
DSH plugin developer sandbox: spawn isolated DeepSeek Harness web mirror instances (own DSH_HOME/port/profile) that mount the plugin under development, with optional host API/model inheritance. GUI panel + sandbox_* agent tools.