dsh-plugin-longgraph: Registering longgraph Writing Skills in DeepSeek Harness

dsh-plugin-longgraph is an MIT-licensed community plugin maintained by levi-qiao, designed specifically for DeepSeek Harness. This plugin does not introduce a new agent runtime; instead, it integrates the longgraph prompt library into conversations through skill seams, primarily providing three authoring skills: longgraph, loop-graph, and loop-converge, with support for features such as interviewing, compiling, and launching DSH prompts. The installation command is `dsh plugin --profile web add github:levi-qiao/dsh-plugin-longgraph`, and after installation, it can be used directly.