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NEW · A FREE PLUGIN FOR DEEPSEEK HARNESS

Agentic Tree by layerPx

See how your AI agents work together.

Agentic Tree is a free plugin for DeepSeek Harness. It shows the shape of your agent team: which session delegated to which, what every run is doing right now, and how a run finished — on one canvas, next to Chat and Trajectory.

Download plugin Installation guide

v0.4.2 · PUBLIC PREVIEW · WORKS WITH DEEPSEEK HARNESS 0.2.0-RC.2

The environment

Meet DeepSeek Harness

DeepSeek Harness desktop app in its dark theme: a sidebar with New Session, Plugins, Automation and workspace sessions, and a conversation in which Harness introduces itself.
Official DeepSeek Harness website
DeepSeek Harness in its light theme with the Agentic Tree tab open on the Agentic Guide view — the Startup example with its role cards and explanations.
DeepSeek Harness with Agentic Tree installed — author's screenshot
Download DeepSeek Harness

DeepSeek Harness is DeepSeek's open-source agent harness: a desktop app and a web UI where agents read your files, run commands and take on whole tasks. Plugins extend what they can do — Agentic Tree is one of them. Official site.

The plugin

Agentic Tree

One tab in Harness: two views of your session, plus an interactive guide with teaching examples. Everything below is a recording on sample data — no real session, no model calls.

DEMO · SAMPLE DATA

Follow a sample team in motion: 14 agents, 24 runs, one live view. The recording holds 81% zoom; the released Live camera uses 56%.

Agentic Tree Team view with sample data: the HQ card is linked by purple delegation lines to the cards of the child agent sessions, and branches can be collapsed.

Team

See how HQ delegates work to DevGuy and Reviewer. The selected session and its child agent sessions on one canvas: delegation links from parent to child, branches you can collapse while you look around.

Agentic Tree Work view with sample data: HQ on the left, then the DevGuy and Reviewer cards for run 1 marked Completed and their run 2 cards marked Running, joined by delegation links, with the zoom, Fit view and Live controls at the bottom right and a Demo · Sample data badge.

Work

Follow separate runs, from completed work to the next active step. Every run of an agent is its own card, background jobs keep their own state, and the optional Live camera follows whatever is running now.

Agentic Guide example with sample data: sequential task cards for the Simple Chat scheme, with notes on when to use it and what its limits are.

Agentic Guide

Explore sample agent patterns with roles, tasks and practical limits. Simple Chat, Duo and Startup on the same canvas — solid purple arrows are delegation, dashed grey arrows are tasks one agent does in a row.

Click any card to inspect its assignment, recorded model, status, duration and tool calls. The plugin only reads what Harness records: it does not launch, stop or prompt agents, adds no model connections and no telemetry, and needs no API key. The plugin is free; model usage stays billed by your model provider.

Setup

Installation guide

Two routes: go straight to step 2 if you already run DeepSeek Harness, or set up Harness first if this is your first time with it. Running the sample task uses model tokens and may incur charges.

ROUTE A

Already have DeepSeek Harness

  1. Check the version. On macOS open the menu DeepSeek Harness → About DeepSeek Harness; on Windows open the app menu in the window title bar → About DeepSeek Harness. You should read Version V0.2.0-rc.2 — the only version this preview is verified on. A newer build is not verified; nothing stops you from updating, but check this page again after you do.
  2. Download the plugin. On the release page v0.4.2 open Assets and download layerpx-harness-agent-viewer-0.4.2.tgz and SHA256SUMS into one folder. Do not take Source code (zip) or Source code (tar.gz): those are source snapshots, not the installation package.
  3. Check the archive (recommended, not required). In that folder run shasum -a 256 -c SHA256SUMS on macOS: it answers layerpx-harness-agent-viewer-0.4.2.tgz: OK. On Windows run Get-FileHash .\layerpx-harness-agent-viewer-0.4.2.tgz -Algorithm SHA256 in PowerShell and compare the hash it prints with the expected SHA-256 of the archive, 27dc75aef1d657155fb88510d2a6b94155786e0d5fd897e3949ffebe0786a5d6.
  4. Add the plugin. Finish whatever Harness is doing, then open Plugins → Add plugin and paste the absolute path to the downloaded .tgz file. Install it and turn it on. Prefer the command line? Install the dsh command once with Manage dsh Command, then run dsh plugin --profile <profile> add /absolute/path/to/layerpx-harness-agent-viewer-0.4.2.tgz.
  5. Restart Harness. Quit it fully and open it again — a new tab appears only after a restart.
  6. Open the tab. Open a conversation and select Agentic Tree beside Chat and Trajectory. Work opens first; Team and Agentic Guide are next to it.
  7. See delegation happen. Paste this into a session — it spends model tokens:
    Use two subagents. One lists the top-level files and folders in this workspace; the other reads the README (if there is one) and summarizes it in three sentences. Then combine both answers into a short overview.
    When the answer arrives, open Team: HQ and the two agents with their links. Work shows their runs. If the model decides not to delegate, Team shows HQ alone — ask again, naming subagents explicitly.
ROUTE B

New to DeepSeek Harness

  1. Download Harness. On the official DeepSeek Harness site press Download Desktop and pick macOS (Apple silicon) or Windows (64-bit). The button always serves the latest build; on 2026-10-08 that was 0.2.0-rc.2, the version this plugin is verified on.
  2. Install and open it. Run the installer, start the app and let it finish its first-run setup.
  3. Sign in or add a model key. Either Sign in, or open Settings → Models and add your provider key there. Model usage is billed by your provider — the plugin being free does not change that.
  4. Choose a workspace. Click Choose workspace and pick the project folder you want the agents to work in.
  5. Check the version. Open About DeepSeek Harness from the app menu — macOS: DeepSeek Harness → About DeepSeek Harness; Windows: the app menu in the window title bar. You should read Version V0.2.0-rc.2. If it is not, the plugin is not verified on your build.
  6. Now install the plugin. Continue with Route A, steps 2 to 7 — the download, the archive check, Plugins → Add plugin, the restart and the sample task that shows delegation.

Troubleshooting

If something goes wrong

There is no Agentic Tree tab

Restart Harness completely and check that the plugin is installed and enabled in Plugins. A tab appears only after a full restart, not after a reload of the window.

Your Harness version is not 0.2.0-rc.2

This preview is verified on 0.2.0-rc.2 only; other versions are unverified, so the plugin may fail on them. Report what you see on the issue tracker — the independent installation check of v0.4.2 is still pending.

You downloaded “Source code”

That archive is a source snapshot, not the installation package. Go back to the release Assets and take layerpx-harness-agent-viewer-0.4.2.tgz with SHA256SUMS.

Remove the plugin

Open Plugins, disable or remove @layerpx/harness-agent-viewer, then restart Harness. Nothing in your sessions or workspaces is deleted with it.

Agentic Tree is a public preview, and it shows what Harness itself records: background-job history comes from the running host and can disappear when it restarts, and event input or results exist only where your build wrote them. When something looks wrong, the fastest route is an issue with your Harness version and what you expected to see.