Fable Commander
Maker/verifier loop with hard gates, 3-round caps and human stops before commits
Test report
- Verdict
- Tested · Works
- Score
- Tested
- Aug 5, 2026
- Environment
- Claude Code 2.x (agent harness)
⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Aug 5, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.
Planned the same job twice — migrating a 40-file Python codebase from requests to httpx — first freehand, then following the skill's Phase -1 and Phase 0. The freehand plan ended with one testable criterion ("all tests pass") and no stop rule; the skill's plan produced five gates with eight machine-decidable checks (grep for requests imports returning zero, pytest exit code under random ordering, tests run with sockets disabled, a post-removal import that must fail, lockfile diff), a 3-round-per-gate cap with escalation after two rounds without improvement, an explicit ban on the verifier rejecting work over style, and a human stop before commit, push or spend. The honest cost: it re-files things the freehand plan already knew — the follow_redirects default flip, the timeout semantics change — as research questions for a fan-out of agents, so on a task any smaller its own Phase -1 gate correctly tells you to skip the whole thing. The README is unusually candid, disclosing the Chinese-language body, the token cost, and a verifier-independence conflict with advisor mode, with both cited claude-code issues resolving.
Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works
- Installs cleanly 5/5
- Triggers reliably 5/5
- Output vs. baseline 7/10
- Docs & honesty 5/5
What Fable Commander does
Runs a task as a commander workflow: the main model only plans, reviews and decides, while research and execution are delegated to user-chosen subagent models, with an independent fresh-context verifier that judges each gate PASS/FAIL on evidence and may not reject work over style or opinion. Triggers on commander-mode phrasings and on requests for a separated maker/verifier execution loop. The SKILL.md is written in Traditional Chinese; Claude follows it whatever language you speak.
How to install Fable Commander
Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.
Commands — how to trigger Fable Commander
-
/fable-commanderMaker/verifier loop with hard gates, 3-round caps and human stops before commits
It also activates on plain-language prompts like these:
-
Run this migration task in commander mode with a separate verifier -
Split maker and verifier so the model doesn't grade its own work -
Use commander workflow to plan and verify this requests to httpx move
Frequently asked questions
- Is the Fable Commander skill free?
- Yes. The skill itself is free from DennisWei9898/fable-commander. SkillProof publishes the install command and an independent test verdict at no cost.
- Does Fable Commander work with Claude Code?
- We tested it with Claude Code 2.x (agent harness) on Aug 5, 2026. Verdict: Tested · Works. Planned the same job twice — migrating a 40-file Python codebase from requests to httpx — first freehand, then following the skill's Phase -1 and Phase 0. The freehand plan ended with one testable criterion ("all tests pass") and no stop rule; the skill's plan produced five gates with eight machine-decidable checks (grep for requests imports returning zero, pytest exit code under random ordering, tests run with sockets disabled, a post-removal import that must fail, lockfile diff), a 3-round-per-gate cap with escalation after two rounds without improvement, an explicit ban on the verifier rejecting work over style, and a human stop before commit, push or spend. The honest cost: it re-files things the freehand plan already knew — the follow_redirects default flip, the timeout semantics change — as research questions for a fan-out of agents, so on a task any smaller its own Phase -1 gate correctly tells you to skip the whole thing. The README is unusually candid, disclosing the Chinese-language body, the token cost, and a verifier-independence conflict with advisor mode, with both cited claude-code issues resolving.
- What is the Fable Commander SkillProof Score?
- 8.8/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 7/10, docs & honesty 5/5.
- How do I install Fable Commander?
- Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
- Can I use Fable Commander with Cursor, Copilot, Gemini CLI, Codex or other AI tools?
- The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.