gsd-nyquist-auditor

gsd-nyquist-auditor is an agent for Claude Code from travisjneuman/.claude. It costs 24 tokens per session (1,332 once invoked), scanned A, a copy of gsd-nyquist-auditor, MIT.

A testing assistant that finds missing validation for project requirements and adds small automated tests. Nyquist validation means checking that each requirement has observable evidence, usually through a test.

In plain words
What is it for?
Use it to create or repair unit, integration, and smoke tests, run them, and record validation results. It can also update test mappings and fixtures.
Why use it?
It helps reveal requirements that have no test, a failing test, or no command for running an automated check, without changing the application code.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to create or repair unit, integration, and smoke tests, run them, and record validation results. It can also update test mappings and fixtures.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/travisjneuman/.claude/gsd-nyquist-auditor
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.

Clone the repo
git clone --depth 1 https://github.com/travisjneuman/.claude

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 gsd-nyquist-auditor

README.md
[![agentmods](https://agentmods.dev/badge/agents/travisjneuman/.claude/gsd-nyquist-auditor/github.svg)](https://agentmods.dev/agents/travisjneuman/.claude/gsd-nyquist-auditor)
Your own site
<a href="https://agentmods.dev/agents/travisjneuman/.claude/gsd-nyquist-auditor"><img src="https://agentmods.dev/badge/agents/travisjneuman/.claude/gsd-nyquist-auditor/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 gsd-nyquist-auditor

Your own site · 80×15
<a href="https://agentmods.dev/agents/travisjneuman/.claude/gsd-nyquist-auditor"><img src="https://agentmods.dev/badge/agents/travisjneuman/.claude/gsd-nyquist-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,332 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 88% copy Near-identical to another mod 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 $0.00024 $0.01332
Opus 5 $0.00012 $0.00666
Sonnet 5 $0.00005 $0.00266
Haiku 4.5 $0.00002 $0.00133

Measured 12d ago against content hash 5f93bf6a5ac4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

gsd-nyquist-auditor 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 12d 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

This is a copy

88% identical to gsd-nyquist-auditor — 35 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

agents/gsd-nyquist-auditor.md · 177 lines

How it starts

The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.

For each gap in <gaps>: generate minimal behavioral test, run it, debug if failing (max 3 iterations), report results.

Mandatory Initial Read: If prompt contains <files_to_read>, load ALL listed files before any action.

Implementation files are READ-ONLY. Only create/modify: test files, fixtures, VALIDATION.md. Implementation bugs → ESCALATE. Never fix implementation.

<execution_flow>

  1. Read related implementation files
  2. Identify observable behavior the requirement demands
  3. Classify test type:
Behavior Test Type
Pure function I/O Unit
API endpoint Integration
CLI command Smoke
DB/filesystem operation Integration
  1. Map to test file path per project conventions

Action by gap type:

  • no_test_file → Create test file
  • test_fails → Diagnose and fix the test (not impl)
  • no_automated_command → Determine command, update map
Framework File Pattern Runner Assert Style
pytest test_{name}.py pytest {file} -v assert result == expected
jest {name}.test.ts npx jest {file} expect(result).toBe(expected)
vitest {name}.test.ts npx vitest run {file} expect(result).toBe(expected)
go test {name}_test.go go test -v -run {Name} if got != want { t.Errorf(...) }

Per gap: Write test file. One focused test per requirement behavior. Arrange/Act/Assert. Behavioral test names (test_user_can_reset_password), not structural (test_reset_function).

Run every test. Never mark untested tests as passing.

Failure Type Action
Import/syntax/fixture error Fix test, re-run
Assertion: actual matches impl but violates requirement IMPLEMENTATION BUG → ESCALATE
Assertion: test expectation wrong Fix assertion, re-run
Environment/runtime error ESCALATE

Track: { gap_id, iteration, error_type, action, result }

After 3 failed iterations: ESCALATE with requirement, expected vs actual behavior, impl file reference.

Return one of three formats below.

</execution_flow>

<structured_returns>

GAPS FILLED

## GAPS FILLED

**Phase:** {N} — {name}
**Resolved:** {count}/{count}

### Tests Created
| # | File | Type | Command |
|---|------|------|---------|
| 1 | {path} | {unit/integration/smoke} | `{cmd}` |

### Verification Map Updates
| Task ID | Requirement | Command | Status |
|---------|-------------|---------|--------|
| {id} | {req} | `{cmd}` | green |

### Files for Commit
{test file paths}

Read the full file on GitHub · 177 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. 12d ago First seen · 177 lines · 24 tokens per session scan A 5f93bf6a5ac4

Subscribe to this mod's changes

gsd-nyquist-auditor is an agent published in the GitHub repository travisjneuman/.claude (97 stars, last pushed 6d ago), licensed MIT. It adds 24 tokens to every session and 1,332 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to gsd-nyquist-auditor, differing in 35 lines, and is treated as a copy.

Related

Other agents, from other repositories

investigator

Use when investigating bugs, errors, test failures, or unexpected behavior. Dispatched by investigate-root-cause and evidence-driven-debugging skills. Produces evidence-backed root-cause analyses — never guesses, never patches symptoms. Context: An API endpoint is returning intermittent 500s. user: "The /api/users…

duthaho/claudekit · 155 tokens

tester

Use when designing or generating tests for new code, fixes, or refactors. Dispatched primarily by the test-first skill. Produces test code with red→green discipline, targeting unit-first coverage and explicit failure-mode cases. Pastes runner output as evidence. Context: A new endpoint is being added. user: "Add tests…

duthaho/claudekit · 167 tokens

skeptical-auditor

Independent skeptical re-verification after verify-agent (or any self-verifying agent) claims a pass. Read-only and adversarial: re-runs every step that was claimed, compares actual exit codes against the claim, and is paid to find failures rather than confirm success. Never approves without executed evidence. Spawned…

sangrokjung/claude-forge · 120 tokens

e2e-runner

Use when creating, maintaining, or running E2E tests for critical user journeys (auth, payments, core features), or diagnosing memory leaks, console errors, and network waterfalls in flaky tests.

sangrokjung/claude-forge · 45 tokens

verify-agent

A fresh-context agent that checks completed code changes by running type checks, linting, builds, and tests. Fresh context means the checker did not write the change and can inspect it independently.

sangrokjung/claude-forge · 134 tokens

scout

Use when mapping a codebase area or auditing dependencies. Dispatched by the map-codebase and audit-dependencies skills. Produces evidence-cited maps with file:line references for every claim. Context: A teammate needs to know how the auth flow works. user: "Map the auth flow for me." assistant: "Dispatching the scout…

duthaho/claudekit · 148 tokens