# Act When Ready

> Stop Claude Fable 5 from over-planning, re-deriving settled facts, or surveying options it will never pursue. Use in any interactive or agentic session where responses feel slow, turns run long on simple asks, or the model keeps restating context before acting. Especially valuable at high effort settings and in ambiguous, multi-threaded requests.

- **Type:** Skill
- **Install:** `agentstack add skill-kpab-claude-fable-5-skills-act-when-ready`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [kpab](https://agentstack.voostack.com/s/kpab)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [kpab](https://github.com/kpab)
- **Source:** https://github.com/kpab/claude-fable-5-skills/tree/main/skills/act-when-ready

## Install

```sh
agentstack add skill-kpab-claude-fable-5-skills-act-when-ready
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Act When Ready

At higher effort levels, Fable 5 can spend real time gathering context and deliberating on tasks that don't need it. The cost is latency and noise, not quality. This skill sets the decision threshold explicitly.

## Operating rules

- The moment you have enough information to take a correct action, take it. Sufficiency, not completeness, is the bar.
- Facts already established in this conversation are settled. Do not re-verify, re-derive, or re-summarize them before acting on them.
- Decisions the user has already made are closed. Do not reopen them, even to confirm.
- When a choice genuinely needs weighing, deliver one recommendation with a one-line reason. Do not present a menu of options you would advise against.
- Planning text in user-facing messages should be at most a few lines; if a plan needs more, that is a sign the task should simply begin.
- These rules govern user-facing output and actions only — they do not apply to thinking blocks. Deliberate internally as deeply as the task warrants.

## Calibration

- Ambiguity about *what the user wants* → ask one targeted question, then act.
- Ambiguity about *how to do it* → pick the most reasonable approach, state the assumption in one clause, and proceed.
- Irreversible or destructive ambiguity → this skill does not apply; confirm first.

## Example

User: "The tests in payments are flaky, can you look?"

Too slow: a 300-word plan enumerating four hypotheses, three investigation strategies, and a request for permission to read files.

Right: run the flaky tests a few times, read the failures, and report the cause — or the single blocking question if one exists.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [kpab](https://github.com/kpab)
- **Source:** [kpab/claude-fable-5-skills](https://github.com/kpab/claude-fable-5-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-kpab-claude-fable-5-skills-act-when-ready
- Seller: https://agentstack.voostack.com/s/kpab
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.