Sophey3dx

Tandem Skill — Development skill for Claude Code

Development community

Persistent pair-programming between Claude Code and the OpenAI Codex CLI: one Codex thread per project, protocol checkpoints with JSON verdicts, plan consensus with automode, cost counter and usage gu.

How to install Tandem Skill

This entry records only its repository, not the path inside it, so there is no exact command to give. Open Sophey3dx/tandem-skill and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Tandem Skill does

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README

Tandem

**Persistent pair-programming between Claude Code and the OpenAI Codex CLI.**

Tandem turns Codex from a one-shot reviewer into a standing partner. One Codex thread per project keeps the whole history: the project summary, every decision, every objection and how it was resolved. Claude sends deltas instead of briefings, Codex answers in strict JSON, and a small Node runner enforces the protocol, the budget and the safety rules.

Tandem is a [Claude Code](https://claude.com/claude-code) skill. It was designed, reviewed and hardened together with Codex itself (see *Credits*).

Why

Ad-hoc "ask Codex" workflows have three recurring problems:

No memory. Every call starts from zero, so every prompt has to re-explain the project.
No protocol. Reviews happen when someone remembers, in whatever format the model picks.
No budget control. A review loop can burn through a ChatGPT usage window before anyone notices.

Tandem fixes all three: a persistent thread, a contact protocol with schema-validated verdicts, and a rate-limit guard that reads the remaining quota *before* each call and refuses to spend it below a threshold.

What is in this release (Plan A, the core)

Capability	What it does
Companion mode (Begleiter)	Claude implements; Codex reviews at protocol checkpoints (after a plan, after each coherent edit block, before "done"). Verdict `OK / CONCERN / BLOCK` with up to five prioritized points.
Plan consensus with automode	A plan travels between Claude and Codex for at most three rounds. Codex answers `APPROVE / REVISE`; the runner computes a hard `consensus` flag (no open BLOCKER/MAJOR, sources read, test strategy feasible, residual risk named). On consensus the plan is executed without a human stop. No consensus after round three: both positions go to the user.
Two final verdicts	The persistent thread checks goal fidelity and earlier objections; a fresh Co