Design-harness provides a structured environment for technical leads and architects to conduct literature reviews, vendor selection, and competitive analysis. It organizes raw sources into ideas and final outputs using a three-layer markdown system, allowing an agent to handle the organization while the human makes the final adjudication.
The tool is built for contested design decisions that require a clear audit trail. By linking disparate papers and half-formed ideas into a cohesive system, it transforms fragmented research into a defendable technical design.
Follow the documented setup, then try a first task.
Installs: Complete design-harness plugin bundle · Claude Code
Enter both commands, in order, in a Claude Code agent session rather than a terminal.
/plugin marketplace add tigerless-labs/design-harness /plugin install design-harness@design-harness
Installs: Complete design-harness plugin bundle · Codex CLI, ChatGPT desktop app
Run this command in a terminal to add the plugin marketplace.
codex plugin marketplace add tigerless-labs/design-harness
Then install the plugin from `/plugins` in the Codex CLI agent session or from the ChatGPT desktop app's plugin directory.
Installs: The single design-harness skill folder · Other SKILL.md-compatible agents
Run from: A directory where the repository can be cloned as ./design-harness
Run this documented command block in a terminal to clone the repository and copy the design-harness folder. The shown destination, `~/.claude/skills/`, is Claude-specific; when installing for another SKILL.md-compatible agent, replace that destination as you enter the copy command with the selected agent's own skill directory. The command text below preserves the author's documented form.
git clone https://github.com/tigerless-labs/design-harness cp -r design-harness/plugins/design-harness/skills/design-harness \ ~/.claude/skills/
Uses design-harness
Use the design-harness skill to file these papers onto the board in [workspace path]: [paper file paths or URLs]. For this first pass, create one source card per paper, grade it, and anchor its claims to the source. Do not assemble the final output yet.
Uses design-harness
Use the design-harness skill in [workspace path] to organize these judgments as idea cards: [your judgments]. Link each judgment to relevant existing evidence, cluster related ideas, and surface conflicts without deciding between them for me.
Uses design-harness
Use the design-harness skill to build the visual canvas for the existing workspace at [workspace path] and give me the local clickable result. Do not assemble or change the final output.
Claude
Codex