# claude-eta

claude-eta tracks task durations in Claude Code and learns from a project’s history. It can also spot repeated errors and prompt a change in approach.

- plugin · `type=plugin` · Claude Code · ★ 6
- Author: MMMProd-Org
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/MMMProd-Org/claude-eta
- Updated: 2026-08-27
- HTML: https://affpapa.org/en/nevibecode/plugins/claude-eta

## What it does

claude-eta classifies tasks, records how long they take, and builds a local history for the project. Once it has seen 10 tasks of the same type, it can add an ETA to the beginning of Claude’s responses. Use `/eta history` to review completed tasks or `/eta stats` to compare durations by task type.

The plugin fingerprints error content to detect a repeated failure pattern. It warns after three repeats and blocks after five, asking Claude to change strategy. It also checks Claude’s time claims against measured project data. Records stay local unless you opt in to sharing anonymized data with the community. Node.js 18 or later is required. In an open Claude Code session, run `/reload-plugins` after installation before using `/eta`.

## Install

### Claude Code (native platform)

**Plugin marketplace**
In the agent chat (not a shell):
```text
/plugin marketplace add anthropics/claude-plugins-community
```
In the agent chat (not a shell):
```text
/plugin install claude-eta@claude-community
```

## When to use it
- estimate task duration from project history
- review actual completion times
- compare durations across task types
- catch repeated identical errors
- check Claude’s time estimates against recorded results

## Example prompts
- Review completed tasks with `/eta history`.
- Compare task durations by type using `/eta stats`.
- Check the active session with `/eta`.

## Source text · SKILL.md · MIT

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````text
# claude-eta

<p align="center">
  <a href="https://github.com/mmmprod/claude-eta/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-MIT-blue?style=flat-square" alt="MIT License" /></a>
  <a href="https://nodejs.org"><img src="https://img.shields.io/badge/node-%3E%3D18-brightgreen?style=flat-square&logo=node.js&logoColor=white" alt="Node >= 18" /></a>
  <a href="https://claude.com"><img src="https://img.shields.io/badge/Claude_Code-plugin-D97757?style=flat-square&logo=claude&logoColor=white" alt="Claude Code Plugin" /></a>
  <img src="https://img.shields.io/badge/data-100%25_local-222?style=flat-square&logo=shield&logoColor=white" alt="100% local by default" />
  <a href="https://github.com/mmmprod/claude-eta/stargazers"><img src="https://img.shields.io/github/stars/mmmprod/claude-eta?style=flat-square&color=yellow" alt="GitHub stars" /></a>
</p>

## Claude has no concept of time. claude-eta gives it one.

Claude says "this should take about 2 days." You finish in 12 minutes.

LLMs have zero feedback between what they promise and what actually happens.
claude-eta creates that loop: it times every task, learns your velocity,
and feeds real data back into Claude before it responds.

After 10 tasks of the same type, ETAs appear automatically — calibrated on YOUR project.

<p align="center">
  <img src="docs/eta-demo.gif" alt="claude-eta ETA demo" width="979" />
</p>

### How it works

1. You type a prompt
2. claude-eta classifies it, starts a timer, injects your velocity stats
3. Claude works. Tool calls, file ops, errors counted silently.
4. Task completes. Real duration recorded. Next estimate improves.
5. After 10 tasks of the same type, ETAs appear automatically at the start of Claude's responses.

## Eval results

Walk-forward replay over real, single-developer task history.

- **p80 coverage at prompt** typically lands in the **75–80% target range** (target: ~80%, since p80 is by definition the value the real duration should fall at or below 80% of the time).
- **MdAPE** (median absolute % error) sits in the **70–95% range** depending on the evaluator stage (`prompt` / `first edit` / `first bash`) — expected for a single-user dataset and tightens as task volume grows.

The exact numbers, the per-stage breakdown, and the version they were captured at live in [docs/eval-snapshot.md](docs/eval-snapshot.md), refreshed at each release. Run `/eta eval` to compute the same report on your own local task history.

### Also catches repair loops

<p align="center">
  <img src="docs/loop-detector-demo.gif" alt="claude-eta loop detector demo" width="979" />
</p>

When Claude hits the same error 3+ times, claude-eta detects the pattern and intervenes:

- At 3x: warning injected at the next prompt
- At 5x: blocks and forces a strategy change

The key: it fingerprints error CONTENT, not just count. TDD (different errors each time) won't trigger it.

### Also catches hallucinated estimates

When Claude says "2 days" for a 10-minute task, the bullshit detector corrects inline
using your measured project data.

## Requirements

- Node.js >= 18
- Claude Code CLI (latest recommended)
- macOS, Linux, Windows (WSL)

## Install

Tested with the current Claude Code CLI. The working install flow is:

```bash
claude plugin marketplace add mmmprod/claude-eta
claude plugin install claude-eta
```

In any already-open Claude Code session, run `/reload-plugins` before trying `/eta`.

Fallback from a local checkout:

```bash
git clone https://github.com/mmmprod/claude-eta.git
cd claude-eta
claude plugin marketplace add ./
claude plugin install claude-eta --scope local
```

Current Claude Code uses `claude plugin install`, not `claude plugin add`.

### Update

```bash
claude plugin marketplace update claude-eta && claude plugin update claude-eta@claude-eta
```

Then restart Claude Code or run `/reload-plugins`.

### Uninstall

```bash
claude plugin uninstall claude-eta
```

Local data stays under `${CLAUDE_PLUGIN_DATA}` (typically `~/.claude/plugins/data/claude-eta-*/`) until you delete it manually.

## Commands
````
END THIRD-PARTY FILE 7d7308dc0011e585

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First 4080 of 8572 bytes. © MMMProd-Org · MIT · https://github.com/MMMProd-Org/claude-eta

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