Tandem Workflow Architect for Codex

Plan with Codex. Govern with Tandem. Run with evidence.

The Tandem Codex Plugin gives Codex the Tandem-specific rules, commands, docs, and API handoffs it needs to design workflows correctly. Codex helps shape the plan; Tandem validates, imports, governs, and runs it.

View GitHub repoInstall in Codex
Tandem Codex Plugin logo
Install

Add Tandem to Codex in one command.

The plugin installs from the GitHub-backed Codex marketplace entry. Once installed, open /plugins in Codex and enable Tandem Workflow Architect.

GitHub install
codex plugin marketplace add frumu-ai/tandem-codex-plugin
Local development install
git clone https://github.com/frumu-ai/tandem-codex-plugin.git
cd tandem-codex-plugin
codex plugin marketplace add "$(pwd)"
What it gives Codex

Codex gets Tandem's workflow grammar.

Design from intent

Codex asks the right planning questions, then shapes the trigger, agents, DAG stages, prompts, outputs, and policy gates into Tandem-native workflow structure.

Validate against Tandem

The plugin routes drafts through the real Tandem engine for preview, validation, import checks, and error repair instead of inventing fields from memory.

Keep execution governed

External writes, paid actions, public posts, irreversible changes, and live runs stay behind explicit approval gates and Tandem audit trails.

Workflow loop

A safer path from idea to live automation.

The plugin is deliberately not a second runtime. It turns Codex into a planning surface, then hands the work back to Tandem whenever validation, import, governance, or execution matters.

  1. 1

    Install the plugin in Codex.

  2. 2

    Point it at a running Tandem engine and token.

  3. 3

    Ask Codex to create or validate a workflow.

  4. 4

    Let Tandem preview, apply, import, and run with approval gates.

Commands

The commands Codex can follow.

Browse command templates
/tandem-doctor

Check engine reachability, auth, and provider readiness.

/create-workflow

Start an intent-to-workflow planning chat and get a plan_id.

/revise-workflow

Iterate on an existing planner draft with a concrete change.

/apply-workflow

Apply a draft into a bundle and run importPreview.

/import-preview-workflow

Preview and, after explicit approval, import a bundle.

/build-complex-workflow

Hand-build a paused multi-agent V2 automation DAG.

/preview-workflow

Run a one-shot preview from a prompt or bundle file.

/validate-workflow

Surface engine errors, warnings, and policy gaps verbatim.

/run-workflow

Trigger a live run only after an explicit approval check.

Requirements

What users need before it works.

Codex CLI

A Codex build that supports plugin marketplace installs.

Tandem engine

A local or hosted engine reachable through TANDEM_BASE_URL.

Engine token

TANDEM_API_TOKEN or TANDEM_API_TOKEN_FILE for authenticated API calls.

Give Codex a Tandem-native way to build workflows.

Install the plugin, run /tandem-doctor, then ask Codex to design a workflow that Tandem can validate and run.

GitHubTandem Docs MCP