confidence-check

confidence-check is a skill for Claude Code, Codex from escapeboy/ai-prompts. It costs 66 tokens per session (1,184 once invoked), scanned A, original, MIT.

A readiness check before starting a substantial implementation. It checks for duplicate solutions, fit with the existing architecture, reliable documentation or project references, and a proven bug cause, requiring at least 90% confidence to proceed.

In plain words
What is it for?
Use it before a new feature, unfamiliar code change, unclear bug fix, new library or API, or the planning-to-building handoff.
Why use it?
It helps prevent implementing the wrong solution in an unfamiliar area or before a bug's cause is understood. Small edits and already-proven fixes can skip the extra checks.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md.

Good fit Use it before a new feature, unfamiliar code change, unclear bug fix, new library or API, or the planning-to-building handoff.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/escapeboy/ai-prompts/confidence-check
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.

Any agent
npx skills add escapeboy/ai-prompts --skill confidence-check
Clone the repo
git clone --depth 1 https://github.com/escapeboy/ai-prompts

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for confidence-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/escapeboy/ai-prompts/confidence-check/github.svg)](https://agentmods.dev/skills/escapeboy/ai-prompts/confidence-check)
Your own site
<a href="https://agentmods.dev/skills/escapeboy/ai-prompts/confidence-check"><img src="https://agentmods.dev/badge/skills/escapeboy/ai-prompts/confidence-check/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for confidence-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/escapeboy/ai-prompts/confidence-check"><img src="https://agentmods.dev/badge/skills/escapeboy/ai-prompts/confidence-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,184 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00066 $0.01184
Opus 5.5 $0.00026 $0.00474
Sonnet 5.5 $0.00013 $0.00237
Haiku 4.5 $0.00007 $0.00118

Measured 8d ago against content hash 636420a38fec, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

confidence-check 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 8d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (confidence.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

01-global-optimization/skills/confidence-check/SKILL.md · 151 lines

How it starts

The opening of the file, as written. The whole thing — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Confidence Check Skill

Purpose

Prevents wrong-direction execution by assessing confidence BEFORE starting implementation.

Requirement: ≥90% confidence to proceed with implementation.

Test Results (2025-10-21):

  • Precision: 1.000 (no false positives)
  • Recall: 1.000 (no false negatives)
  • 8/8 test cases passed

When to Use (and When NOT to)

Use it Skip it — a simpler path wins
A new feature or module, before the first line of code A typo, rename, copy change or one-line config tweak — just make the edit
Work in an area of the codebase you have not explored yet A change in code you just read — the checks would repeat what you know
A bug fix whose root cause is not yet proven The root cause is already reproduced — go to fix-bug or fix it directly
Adopting a library or API you have not used in this project Looking up one API detail — query the docs (Context7) directly
The Plan → Build gate of a sprint Pure research or review with no implementation planned — use code-research

Before a non-trivial implementation, it checks that:

  • No duplicate implementations exist
  • Architecture compliance verified
  • Official documentation reviewed
  • Working OSS implementations found
  • Root cause properly identified

Confidence Assessment Criteria

Calculate confidence score (0.0 - 1.0) based on 5 checks:

1. No Duplicate Implementations? (25%)

Check: Search codebase for existing functionality

# Use Grep to search for similar functions
# Use Glob to find related modules

✅ Pass if no duplicates found ❌ Fail if similar implementation exists

2. Architecture Compliance? (25%)

Check: Verify tech stack alignment

  • Read CLAUDE.md, PLANNING.md
  • Confirm existing patterns used
  • Avoid reinventing existing solutions

✅ Pass if uses existing tech stack (e.g., Supabase, UV, pytest) ❌ Fail if introduces new dependencies unnecessarily

Read the full file on GitHub · 151 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 8d ago First seen · 151 lines · 66 tokens per session scan A 636420a38fec

Subscribe to this mod's changes

confidence-check is a skill published in the GitHub repository escapeboy/ai-prompts (91 stars, last pushed 9d ago), licensed MIT. It adds 66 tokens to every session and 1,184 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-08.

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