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Verified Core Discipline

Category: Product  ·  Sub-category: product-misc  ·  Last updated:
The theory and praxis of this project's multi-tier correctness architecture — the verified core (the sorted facades, the lattice/solver algebra, the compare and claim chokepoints, the solve-certifier, the sparing reference model, the minispec law corpus) and the check-ladder around it (types, Kani, property tests, DST, runtime certification, Lean-over-derived-definitions). Exists chiefly for agents whose MAIN task is something else — it tells you when you have wandered near something correctness-critical, what the thing in your way actually guarantees, which instrument owns which kind of correctness, and how to proceed without weakening anything. The one law above all: never weaken the question to pass a check.
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From the source SKILL.md

This project runs a layered correctness architecture. A small verified core — the owned sorted facades (core::sorted), the abstract-domain algebra (lattices, the fixpoint solver), the coordinate-comparison and claim/license chokepoints, the sparing/composition algebra and its naive reference model, the solve-certifier — is surrounded by a check-ladder of increasingly strong instruments, and the big, churny engine above it is deliberately untrusted: its answers are checked, not believed. A separate literate spec corpus (minispec/) states the few laws the project opts to verify, over…

What this skill does

Verified Core Discipline is a community-contributed Claude Code skill in the product-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/verified-core-discipline/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Verified Core Discipline Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/verified-core-discipline
curl -L https://claudskills.com/skills/verified-core-discipline/SKILL.md \
  -o ~/.claude/skills/verified-core-discipline/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/verified-core-discipline/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/verified-core-discipline/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\verified-core-discipline\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Verified Core Discipline Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/verified-core-discipline/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Verified Core Discipline skill do?
The theory and praxis of this project's multi-tier correctness architecture — the verified core (the sorted facades, the lattice/solver algebra, the compare and claim chokepoints, the solve-certifier, the sparing reference model, the minispec law corpus) and the check-ladder around it (types, Kani, property tests, DST, runtime certification, Lean-over-derived-definitions). Exists chiefly for agents whose MAIN task is something else — it tells you when you have wandered near something correctness-critical, what the thing in your way actually guarantees, which instrument owns which kind of correctness, and how to proceed without weakening anything. The one law above all: never weaken the question to pass a check.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Verified Core Discipline skill?
Use Verified Core Discipline when your Claude Code task falls under the Product category — specifically in the product misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Verified Core Discipline" or describe the task and let Claude pick). Browse related skills at /category/product/.
What is a Claude Code skill and how does the Verified Core Discipline skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Verified Core Discipline is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
ELLIOTTCABLE. (2026). Verified Core Discipline [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/verified-core-discipline/
BibTeX
@misc{verified-core-discipline-2026,
  author    = {ELLIOTTCABLE},
  title     = {Verified Core Discipline [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/verified-core-discipline/}
}

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Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.

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