A plan-review workflow that sends a Claude-written coding plan to Codex for review, applies suggested fixes, and repeats until the plan is accepted or reaches its iteration limit.

Use /plan-tango:tango in plan mode to review and refine the active plan file with Codex.

It reduces the need to copy plans between tools and helps catch problems before implementation begins.

tango — Skill for Claude Code and Codex by egsok: A plan-review workflow that sends a Claude-written coding plan…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/egsok/plan-tango/tango

Any agent

npx skills add egsok/plan-tango --skill tango

Clone the repo

git clone --depth 1 https://github.com/egsok/plan-tango

Made for: Claude Code, Codex.

Or install plan-tango, the plugin that ships this one along with the rest of its 3 skills, 1 agent, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/egsok/plan-tango/tango.svg)](https://agentmods.dev/skills/egsok/plan-tango/tango)

Your own site

<a href="https://agentmods.dev/skills/egsok/plan-tango/tango"><img src="https://agentmods.dev/badge/skills/egsok/plan-tango/tango.svg" alt="Measured on agentmods" height="20"></a>

Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 9,344 The whole file, excluding the scripts and references it only reads on demand.

Security scan B 1 finding. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00079	$0.09344
Opus 5	$0.00039	$0.04672
Sonnet 5	$0.00016	$0.01869
Haiku 4.5	$0.00008	$0.00934

Measured 3d ago against content hash f160893e7ed8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

tango scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

The scan reads SKILL.md. This mod also ships 15 executable files (scripts/apply-fixes.mjs, scripts/commit-iter.mjs, scripts/doctor.mjs, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

- `--model <m>` (default unset — Codex picks from `~/.codex/config.toml`).

plugins/plan-tango/skills/tango/SKILL.md · 276 lines

How it starts

The opening of the file, as written. The whole thing — 276 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Works inside plan mode (Read/Edit of plan-file allowed; Bash/Task via permission prompts).

<execution_context>

Codex CLI: codex exec --json --sandbox read-only -o <file> from run-codex-review.mjs. Required: codex on PATH (codex --version), auth via codex login or /codex:setup.
User config (optional): ~/.claude/plan-tango/config.json. CLI overrides. Schema: ${CLAUDE_PLUGIN_ROOT}/skills/tango/user-config.example.json.
Helper scripts at ${CLAUDE_PLUGIN_ROOT}/skills/tango/scripts/:
- plan-paths.mjs (validate/newest/list-recent/resolve-repo/hash), workspace.mjs (ensure/cleanup), snapshot.mjs, lock.mjs (acquire/refresh/release/inspect), apply-fixes.mjs (dry-run classifier → edit_plan + ledger_template + advisory_plan), parse-codex-jsonl.mjs, parse-codex-verdict.mjs.
- load-config.mjs — merges CLI + config + defaults; emits {merged, sources, warnings}.
- init.mjs — orchestrates Phase A in one Bash call (validate plan + codex CLI + repo + load-config + lock + state init/resume + workspace ensure). Returns full context bundle for the orchestrator to bind, with internal lock-cleanup on partial failure.
- prepare-iter.mjs — single deterministic builder for ALL iter{N} artifacts: iter{N}.prompt.md, iter{N}.params.json, empty stub iter{N}.last-message.txt. Settings come inline via --state-settings '<json>' — no per-iter iter{N}.settings.json Write needed (step 13).
- run-codex-review.mjs — codex exec wrapper (called directly via Bash from step 15). Filters cosmetic rollout-recording stderr (see references/codex-thread-investigation.md). Retries codex_empty_output once internally before reporting.
Subagent at ${CLAUDE_PLUGIN_ROOT}/agents/: plan-tango:plan-final-checker (opus, sanity check on converged statuses — Phase D only).
Templates: references/review-prompt-template.md, references/verdict-contract.md. Schemas (state, params, ledger, verdict): references/schemas.md. </execution_context>

Default thread mode is continue (reuses one Codex thread; injects <reset_iteration> block at iter ≥ 2). Advanced flags — --continue-thread / --fresh-each (override thread mode), --service-tier <fast|flex>, --fast, --codex-profile <name>, extra_codex_config (config field) — are documented in references/advanced-config.md. The loader (load-config.mjs) emits a warnings array the orchestrator surfaces (Phase A step 4). The removed final_check aliases (--no-final-check / --force-final-check, config auto / force) are no longer migrated — the loader hard-errors naming the canonical replacement (--final-check, never / always).

Read the full file on GitHub · 276 lines

Files

What ships with it

24 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

3d ago First seen · 276 lines · 79 tokens per session scan B f160893e7ed8

Subscribe to this mod's changes

tango is a skill published in the GitHub repository egsok/plan-tango (28 stars, last pushed 1mo ago), licensed MIT. It adds 79 tokens to every session and 9,344 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Code review Planning

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

brainstorming

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

obra/superpowers · 37 tokens

auto-perf-optimize

Run agent-driven VS Code performance or memory investigations. Use when asked to launch Code OSS, automate a VS Code scenario, run the Chat memory smoke runner, capture renderer heap snapshots, take workflow screenshots, compare run summaries, or drive a repeatable scenario before heap-snapshot analysis.

microsoft/vscode · 62 tokens

chat-perf

Run chat perf benchmarks and memory leak checks against the local dev build or any published VS Code version. Use when investigating chat rendering regressions, validating perf-sensitive changes to chat UI, or checking for memory leaks in the chat response pipeline.

microsoft/vscode · 51 tokens

chat-pet-sprite-creation

Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.

microsoft/vscode · 53 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

tango