strict-validation-setup

A one-time setup for strict code-checking tools and a per-task GOALS.md file, a document that records what the task must achieve.

In plain words
What is it for?
Use it to configure strict validation for TypeScript, Python, or Rust projects and create task-specific goal and failing-test scaffolding.
Why use it?
It gives an agent automatic checks for types, style, schemas, and task goals, reducing the chance that work is accepted without self-verification.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/outlinedriven/odin-codex-plugin/strict-validation-setup
Any agent
npx skills add OutlineDriven/odin-codex-plugin --skill strict-validation-setup
Clone the repo
git clone --depth 1 https://github.com/OutlineDriven/odin-codex-plugin

Made for: Claude Code, Codex.

Per session 184 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,281 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00184 $0.01281
Opus 5 $0.00092 $0.00641
Sonnet 5 $0.00037 $0.00256
Haiku 4.5 $0.00018 $0.00128

Measured 3d ago against content hash b92071843c04, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

strict-validation-setup 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 3d ago.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/strict-validation-setup/SKILL.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The skill ships two distinct concerns split by temporal phase:

  • Project-stable — strict-mode tooling config + AGENTS.md authoring (defer the AGENTS.md content to init; this skill only ensures it exists and references the per-task pattern).
  • Task-ephemeral.agent-tasks/<task-id>/GOALS.md per task plus failing-test scaffolding co-located with it.

These never mix. Task goals never go into AGENTS.md (would leak as project policy). Project invariants never go into per-task GOALS.md (would duplicate per task and drift).

Modality differentiation

Skill Owns
strict-validation-setup Strict-mode tooling configs + per-task GOALS.md convention (this file)
init AGENTS.md authoring (project-stable) — defer to it for content
test-driven TDD discipline (RED → GREEN → REFACTOR) — defer for test-writing methodology
type-driven Refined-type / typestate specs — defer for type-system invariants
design-by-contract Pre/post conditions, runtime contracts — defer for assertion patterns
validation-first State-machine specs (typestate / FSM / actor) — defer for FSM modeling
tests-adversarial Assumption-violation tests — defer for the adversarial test pattern
setup-pre-commit Commit-hook installation — defer for hook tooling
setup-gitignore Gitignore patterns — defer for ignore-file composition

Duplication with the existing skills was audited and accepted; bodies cite each rather than re-doing the work. When the surface narrows to a single concern above, defer.

Three parts

Read the full file on GitHub · 72 lines

Files

What ships with it

6 files 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. 3d ago First seen · 72 lines · 184 tokens per session scan A b92071843c04

Subscribe to this mod's changes

strict-validation-setup is a skill published in the GitHub repository OutlineDriven/odin-codex-plugin (15 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 184 tokens to every session and 1,281 once invoked, about $0.0009 per session on Opus 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 2026-08-30.

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