Is the ControlFlow Executability Verifier skill free?

Yes. The skill itself is free from Smithbox-ai/ControlFlow. SkillProof publishes the install command and an independent test verdict at no cost.

What is the ControlFlow Executability Verifier SkillProof Score?

8.0/10 — installs cleanly 3/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 4/5.

How do I install ControlFlow Executability Verifier?

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 ControlFlow Executability Verifier 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.

ControlFlow Executability Verifier

Simulates a saved plan's first tasks cold-start to catch vague phases before coding starts.

by Smithbox-ai · Smithbox-ai/ControlFlow

Works with setup

Install — copy the command Download source ↗

Test report

Verdict: Works with setup
Score: 8.0/10
Tested: Jul 16, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 67a5236

Ran a vague 3-phase 'add rate limiting' plan through it: it correctly stopped at Phase 1 (no framework/target file named) and refused to guess, producing a structured FAIL verdict a freeform review didn't match in rigor -- but step 6's save path points at ../../templates/executability-verifier-report-template.md, a file that does not exist anywhere in the source repo.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 3/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 4/5

What ControlFlow Executability Verifier does

Walks a saved implementation plan through an 8-point clarity checklist and a TDD-style walkthrough, stopping at the first real blocker instead of assuming intent. Trigger it before starting on a large or low-confidence plan, or whenever the early phases might be too vague for a fresh executor to follow without hidden context.

How to install ControlFlow Executability Verifier

git clone https://github.com/Smithbox-ai/ControlFlow.git
mkdir -p ~/.claude/skills
cp -r ControlFlow/.cursor/skills/controlflow-executability-verifier ~/.claude/skills/controlflow-executability-verifier

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger ControlFlow Executability Verifier

/controlflow-executability-verifier Simulates a saved plan's first tasks cold-start to catch vague phases before coding starts.

It also activates on plain-language prompts like these:

Before I start coding, check if Phase 1 of this plan is too vague
Walk through my saved implementation plan like a fresh executor would
Stress-test this rate-limiting plan for hidden context gaps

Frequently asked questions

Is the ControlFlow Executability Verifier skill free?: Yes. The skill itself is free from Smithbox-ai/ControlFlow. SkillProof publishes the install command and an independent test verdict at no cost.
Does ControlFlow Executability Verifier work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Works with setup. Ran a vague 3-phase 'add rate limiting' plan through it: it correctly stopped at Phase 1 (no framework/target file named) and refused to guess, producing a structured FAIL verdict a freeform review didn't match in rigor -- but step 6's save path points at ../../templates/executability-verifier-report-template.md, a file that does not exist anywhere in the source repo.
What is the ControlFlow Executability Verifier SkillProof Score?: 8.0/10 — installs cleanly 3/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 4/5.
How do I install ControlFlow Executability Verifier?: 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 ControlFlow Executability Verifier 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.