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Multi-harness workspace

T3 Code

A minimal web and desktop GUI that presents five coding harnesses through one session model.

Status
Active
License
MIT
Source access
Open source
Record checked

At a glance

People who want a lightweight multi-harness interface with worktrees, diffs, checkpoints, and remote access.

Good choice if

People who want a lightweight multi-harness interface with worktrees, diffs, checkpoints, and remote access.

Check before choosing

The project calls itself early-stage, and current first-party evidence does not establish live multi-user collaboration.

Workflow fit

Existing evidence gates classify four predefined workflows. Bands are non-numeric and do not rank product quality.

  • One agent + review

    Strong fit

    Stay close to one coding session and inspect changes in a dedicated visual surface.

    Current sources document visual review, workspace isolation.
  • Parallel local tasks

    Strong fit

    Run several coding tasks on one machine without their branches or files colliding.

    Current sources document parallel sessions, workspace isolation, visual review.
  • Remote control

    Good fit

    Start or revisit coding work away from the machine where the repository is running.

    Every required mechanism is documented; current sources do not establish the preferred shared team access mechanism.
  • Shared team workspace

    Conditional fit

    Let teammates enter the same live workspace to watch, steer, preview, or review work.

    The product may fit, but current sources do not establish shared team access.

Harness coverage

Five built-in drivers. You bring the existing subscriptions and credentials for each provider; T3 Code does not resell keys or tokens.

5 named integrations
  • Claude Code
  • Codex
  • Cursor Agent
  • Grok
  • OpenCode

Workflow mechanisms

Unknown means the current first-party record does not establish the mechanism; it is not converted into evidence of absence.

4 of 5 documented
  • parallel sessions

    Documented

    The orchestration contracts model multiple threads and independent provider runtimes.

  • workspace isolation

    Documented

    The server creates and removes Git worktrees for threads.

  • visual review

    Documented

    Checkpoint diffs and Git review operations are part of the GUI workflow.

  • remote execution or access

    Documented

    Official user documentation covers remote access, relay connections, and mobile clients.

  • shared team access

    Not established

    The current official record does not establish shared live teammate access to one thread.

T3 Code new-thread view with the HarnessMatch project selected and the coding-agent composer open.
Current T3 Code new-thread workspace, captured in the HarnessMatch repository.
HarnessMatch capture
T3 Code preview
T3 Code new-thread view with the HarnessMatch project selected and the coding-agent composer open.

Technical and public context

Implementation inspection and source-native activity provide investigation context. Neither changes workflow fit.

Inspect implementation record and public activityContext, not workflow fit

Public activity signals

Daily source snapshots provide ecosystem context only. They do not affect workflow fit or capability claims.

3 mapped sources
  • Homebrew distribution2,648

    install events over 30 days · v0.0.40

    Observed Open source record
  • GitHub installers350,702

    stable installer downloads · 13 releases in 90 days

    Observed Open source record
  • GitHub repository22,034

    stars · 5,427 forks

    Observed Open source record

Implementation record

Inspected at commit 887dd6e455bb.

  • The server registers five built-in provider drivers: Codex, Claude Code, Cursor Agent, Grok, and OpenCode.
  • Git worktree creation, removal, checkpoint diffs, and remote access are implemented.
  • The GUI supervises external coding harnesses rather than replacing their agent loops.
Inspected paths
  • apps/server/src/provider/builtInDrivers.ts
  • apps/server/src/provider/Drivers/GrokDriver.ts
  • apps/server/src/provider/Drivers/OpenCodeDriver.ts
  • apps/server/src/vcs/GitVcsDriverCore.ts
  • apps/server/src/checkpointing/CheckpointDiffQuery.ts
  • docs/user/remote-access.md

The project describes itself as early-stage; inspected mechanisms do not establish product stability or parity across every client.

First-party evidence

Sources establish specific current GUI claims; their count does not add fit points.

2 first-party sourcesGUI record checked