loopback

A repeated work loop for a coding session. It runs the same task again until a stated completion condition is met or a maximum number of attempts is reached.

In plain words
What is it for?
Use it to iterate on code, tests, or other file changes across several attempts. You can keep the same session or start each attempt fresh.
Why use it?
It helps when one attempt may not finish or improve the work reliably. The loop checks whether the task is truly complete before stopping.

Command

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 commands/okwinds/miscellany/loopback
Clone the repo
git clone --depth 1 https://github.com/okwinds/miscellany
Per session 8 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 413 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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.

ModelPer sessionOnce invoked
Fable 5 $0.00008 $0.00413
Opus 5 $0.00004 $0.00206
Sonnet 5 $0.00002 $0.00083
Haiku 4.5 $0.00001 $0.00041

Measured 2d ago against content hash 33fa51465c0c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

loopback scanned grade A with 0 findings 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 2d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agent/skills/loopback/commands/loopback.md · 35 lines

What it actually says

Loopback Command

如果你不确定该怎么传参/怎么把“完成标准”写成可停止的契约,先运行一次轻量向导(不会创建状态文件、不会启动循环):

/loopback --guide

默认会先进入向导模式(如环境不支持交互,则降级为“步骤概览 + 契约预检”);如需跳过向导:加 --no-wizard

Execute the setup script to initialize the Loopback state file (it will also launch the driver unless --dry-run or --no-run is set):

"${CLAUDE_PLUGIN_ROOT}/scripts/setup-loopback.sh" $ARGUMENTS

Please work on the task. When you try to complete, the Loopback system will check for completion conditions:

  • If --max-iterations is reached, the loop stops
  • If --completion-promise is detected in your output, the loop stops
  • Otherwise, the SAME PROMPT will be fed back for the next iteration

By default Loopback reuses the same Codex session across iterations (similar to Ralph Loop). Use --fresh-session if you want each iteration to start a new session.

You'll see your previous work in files and git history, allowing you to iterate and improve.

CRITICAL RULE: If a completion promise is set, you may ONLY output it when the statement is completely and unequivocally TRUE. Do not output false promises to escape the loop, even if you think you're stuck or should exit for other reasons. The loop is designed to continue until genuine completion.

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.

  1. 2d ago First seen · 35 lines · 8 tokens per session scan A 33fa51465c0c

Subscribe to this mod's changes

loopback is a command published in the GitHub repository okwinds/miscellany (50 stars, last pushed 3mo ago), licensed MIT. It adds 8 tokens to every session and 413 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.