01 ▸ Desktop app ▸ Tauri · Node · vanilla JS

L1halo

A desktop view of Claude Code sessions as they run: what the orchestrator is doing right now, which sub-agents are running or parked, how much context is left and what the session has cost.

Role: Design, build, ship
Platform: Windows x64
Version: v0.2.0
License: Apache-2.0

L1halo Galaxy view: thousands of actions from one session drawn as concentric rings, one ring per turn, with failed calls marked in red and a node readout panel on the right — Galaxy: one session as rings, one per turn. This one is 2,708 actions over 75 turns with 28 sub-agents; the 16 failed calls are marked in red.

What it shows

Orchestrator state, from the live stream: thinking, working, dispatching, awaiting background agents, your turn, or ended. A context bar visibly drops when the context is compacted.
Sub-agents appear when they actually spawn, under whoever dispatched them, with role, model and colour read from the project's agent definitions. Workflow runs show one node per run with their agents beneath it.
Tool calls by family: reads, edits, searches, shell commands and dispatches each get their own glyph and colour, so twenty calls in a row have a rhythm instead of twenty identical rows.
Cost from the real usage blocks in the transcript, priced per token type, not an estimate.
A prompt timeline: click an earlier prompt to rewind the graph to the end of that turn. Agents that had not run yet appear as ghosts.

L1halo Swarm view: the orchestrator at the top with review and verify sub-agents from a workflow run arranged beneath it — Swarm: the orchestrator and every sub-agent it dispatched, with workflow agents grouped under their run.

L1halo Focus view in the light theme: a session's turns listed as a path, most folded, with the latest tool calls expanded — Focus, light theme: the session as a path of turns you can scrub through, one room per action.

L1halo All sessions view: workspaces plotted as stations around a local center, each with its session count — All sessions: each workspace is a station, and sessions waiting on you are listed on the left.

L1halo detail panel in the Ember theme: billed tokens, rate, model, the latest tool call and its result, and a token breakdown — Detail, Ember theme: billed tokens, the last tool call and its result, and where the context went.

How it is built

It started as a fork of agent-flow. The original canvas UI ran a continuous animation loop and used a lot of memory in Firefox, so I rebuilt the frontend in plain DOM and SVG with no bundler and no build step, and vendored the relay engine so I could extend it directly. The upstream telemetry client and its hardcoded key are gone.

Relay: a local Node process reads Claude Code transcripts and hook events and streams them to the UI from 127.0.0.1.
Hooks: it registers 7 Claude Code hooks on first launch, keeps a backup of the original settings, and the uninstaller removes exactly those 7 and nothing else.
Shell: a Tauri app with a pinned, checksum-verified Node runtime. Per-user install, no admin rights, 23.9 MB installer.
One install, every project: point it at the parent folder and each subfolder becomes its own session, grouped by workspace.

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