Behavioral Layer for Claude

Claude keeps losing
the thread.
These skills make it stick.

You've felt it. Long session, Claude drifts. Forgets the vibe. Goes generic. Upload a .md file, say the name, and Claude works differently. For the entire conversation.

You own the files  ·  Works in Claude, Perplexity & Gemini

The Problem

You're not bad at prompting.
Claude just keeps forgetting.

Three things that kill your workflow every single time.

System Decay

Claude gets sharp, then gets dumb. The longer the session, the more it drifts. You end up re-explaining yourself like it's the first message.

AI Slop Output

Looks right. Reads wrong. The kind of output you spend 20 minutes fixing before it sounds like a human wrote it.

Context Lock-In

Your logic is trapped in a chat window. Close the tab and it's gone. Your best thinking evaporates with the session.

Sentinel Skills solve all three ↓
How It Works

Not prompts. A system.

A Cognitive OS for Claude. Upload a .md file and Claude shifts into a new behavioral mode. Instantly, for the entire conversation.

01 · Download

Grab Your Skill

A single .md file from Contra. No apps, no subscriptions, no wrappers. You own it.

02 · Upload

Install in Claude

Settings → Skills → + button. Thirty seconds. Works with Claude Pro and Team plans.

03 · Activate

Say the Name

Say the skill name. Claude shifts into that mode immediately. No re-explaining, no drift.

Free Claude Skill

You have an idea.
Let's actually build it.

MVP Build Flow is a free 90-minute guided workshop. You describe the idea, Claude runs the process. Walk away with a complete build prompt, zero-shot, ready to paste into Bolt, Lovable, or Cursor.

Get MVP Build Flow Free ↗
  • A 90-minute structured workshop, not a template
  • Claude guides you through scoping, features, and architecture
  • Walk out with a mega prompt ready to paste into any AI builder
  • Works standalone. No other skills required
  • Compatible with Bolt, Lovable, Cursor, Firebase Studio
Skill Bundles

Built for how you actually work.

Each bundle works standalone. Every skill connects. Pick one entry point, or get the complete system.

Modes Bundle
3 skills

Claude that reads
the room.

Three behavioral environments that shape how Claude engages. From open reflection to structured architecture to creative production.

Aware Mode
Meta Mode
Vision Mode
Lenses Bundle
3 skills

A fresh take
when you need it.

Three perspective tools that drop into any conversation, shifting how you see a situation, plan, or challenge in real time.

Stoicism Lens
Optimism Lens
Defensive Pessimism Lens
Workshops Bundle
3 skills

Sit down. Walk away
with something.

Three guided sessions, each ending with a tangible deliverable. Strategy reports, context packets, insight statements.

Optimal Flow
Context Elicitation Flow
Insight Capture Flow
Vision Enhancers
3 skills

Map it. Shape it.
Ship it.

Three tools that extend Vision Mode or work standalone. Journey maps, visual surfaces, distribution-ready outputs.

Map Flow
Design Flow
Publish Flow
Utility Protocols
2 skills

Feed it in.
Pull the gold out.

Two precision protocols for managing information. Drop in documents, absorb them, extract exactly what matters.

Ingestion Flow
Extraction Flow
·
Sentinel OS
15 skills

Everything you need
to think better.

All 15 skills. Every mode, lens, workshop, and flow. Use them standalone or as a complete OS for how you build with Claude.

3 Modes · 3 Lenses
3 Workshops · 2 Protocols
3 Vision Enhancers
Sentinel AI

Your first skill
is free.
Your workflow changes today.

Download MVP Build Flow. Upload it. Say the name. Feel the difference in the first response.