noddde: Skill for Claude Code

.claude/skills/validate-spec/SKILL.md

validate-spec is a skill for Claude Code from dogganidhal/noddde. It costs 36 tokens per session (1,759 once invoked), scanned A, original, MIT.

A procedure for checking whether working code fully matches its written software specification. It compares the specification, source code, and tests, including their exports and required behaviour.

In plain words
What is it for?
It is for a final implementation review after tests pass, checking coverage, behaviour, invariants, edge cases, and leftover stubs.
Why use it?
Passing tests alone may miss missing exports, unhandled edge cases, or code that has drifted from the specification.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter.

This is dogganidhal/noddde's own configuration. It tells Claude Code how to work on noddde itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything noddde configures →

Reuse

Borrowing it

Nothing to install: this file belongs to dogganidhal/noddde. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/dogganidhal/noddde/main/.claude/skills/validate-spec/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/dogganidhal/noddde

Made for: Claude Code.

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 validate-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/dogganidhal/noddde/validate-spec/github.svg)](https://agentmods.dev/skills/dogganidhal/noddde/validate-spec)
Your own site
<a href="https://agentmods.dev/skills/dogganidhal/noddde/validate-spec"><img src="https://agentmods.dev/badge/skills/dogganidhal/noddde/validate-spec/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 validate-spec

Your own site · 80×15
<a href="https://agentmods.dev/skills/dogganidhal/noddde/validate-spec"><img src="https://agentmods.dev/badge/skills/dogganidhal/noddde/validate-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,759 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 5
    Skill selects an external model or provider that may use a different account or billing plan than the operator expects. Undisclosed model switches can cause unexpected cost or quota consumption.
    Fix: Remove the model/provider override or disclose it prominently and require explicit operator approval before invoking an external coding CLI or billed model.
  • medium MCP Rug Pull · line 102
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium MCP Rug Pull · line 106
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
How audits are shown
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 $0.00036 $0.01759
Opus 5.5 $0.00014 $0.00704
Sonnet 5.5 $0.00007 $0.00352
Haiku 4.5 $0.00004 $0.00176

Measured 2mo ago against content hash 151c05ee9cb9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

validate-spec 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 2mo 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.

.claude/skills/validate-spec/SKILL.md · 223 lines

How it starts

The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Step 5: Validate Spec Against Implementation

Final cross-check: verify the implementation fully satisfies the spec, beyond just passing tests.

Pipeline step 5 of 6. Called by the /spec orchestrator after step 4 (tests GREEN).

Why this step exists: Tests can pass while the implementation still drifts from the spec — missing exports, unenforced invariants, unhandled edge cases, leftover stubs. This step catches that.

Step 1: Find Spec and Source

Accept either a spec path or source file path:

  • Spec → source: read source_file from frontmatter
  • Source → spec: replace packages/core/src/ with specs/core/, .ts with .spec.md

Read both files completely. Also read the test file.

Step 2: Export Coverage

Compare the spec's exports frontmatter against the source file's actual exports.

Export Coverage:
  ✅ AggregateTypes — exported in source
  ✅ defineAggregate — exported in source
  ❌ InferAggregateID — listed in spec but NOT exported in source
  ⚠️  HelperUtil — exported in source but NOT listed in spec

Flags:

  • ❌ = spec promises this export but it's missing → implementation gap
  • ⚠️ = source exports something the spec doesn't mention → spec may be incomplete, or export is internal

Step 3: Behavioral Requirement Audit

For each numbered behavioral requirement in ## Behavioral Requirements:

  1. Read the requirement
  2. Search the source file for the implementation
  3. Check if a corresponding test exists in the test file
  4. Grade: ✅ (implemented + tested) | 🔧 (implemented, not tested) | ❌ (not implemented)
Behavioral Requirements:
  1. ✅ "DecideHandlerMap requires one handler per command name" — enforced via mapped type, tested
  2. ✅ "defineAggregate is a pass-through identity function" — implemented, tested
  3. ❌ "Command handler returns single event normalized to array" — stub in source

Step 4: Invariant Check

For each invariant in ## Invariants:

  1. Check if it's enforced by the type system (compile-time) or runtime check
  2. Check if there's a test that would catch a violation

Read the full file on GitHub · 223 lines

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. 2mo ago First seen · 223 lines · 36 tokens per session scan A 151c05ee9cb9

Subscribe to this mod's changes

validate-spec is a skill published in the GitHub repository dogganidhal/noddde (52 stars, last pushed 1mo ago), licensed MIT. It adds 36 tokens to every session and 1,759 once invoked, about $0.0001 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 2026-08-30.

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