test-deep

test-deep is a skill for Claude Code from sd0xdev/sd0x-harness. It costs 77 tokens per session (2,305 once invoked), scanned A, original, MIT.

A context-aware test runner that selects relevant tests, runs them in stages, and investigates failures. Test triage means sorting failures to identify their likely causes.

In plain words
What is it for?
Use it to choose tests based on code changes, analyze failed tests, and apply safe automatic fixers without committing changes.
Why use it?
It avoids running unrelated tests when possible and helps developers understand which failures matter and what may have caused them.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions CLAUDE.md; names the AskUserQuestion tool; mentions Codex.

Part of the sd0x-dev-flow plugin — 101 skills, 16 agents, 5 hooks shipped together

Good fit Use it to choose tests based on code changes, analyze failed tests, and apply safe automatic fixers without committing changes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sd0xdev/sd0x-harness/test-deep
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.

Any agent
npx skills add sd0xdev/sd0x-harness --skill test-deep
Clone the repo
git clone --depth 1 https://github.com/sd0xdev/sd0x-harness

Made for: Claude Code.

Or install sd0x-dev-flow, the plugin that ships this one along with the rest of its 101 skills, 16 agents, 5 hooks.

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 test-deep

README.md
[![agentmods](https://agentmods.dev/badge/skills/sd0xdev/sd0x-harness/test-deep/github.svg)](https://agentmods.dev/skills/sd0xdev/sd0x-harness/test-deep)
Your own site
<a href="https://agentmods.dev/skills/sd0xdev/sd0x-harness/test-deep"><img src="https://agentmods.dev/badge/skills/sd0xdev/sd0x-harness/test-deep/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 test-deep

Your own site · 80×15
<a href="https://agentmods.dev/skills/sd0xdev/sd0x-harness/test-deep"><img src="https://agentmods.dev/badge/skills/sd0xdev/sd0x-harness/test-deep.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,305 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: 1 finding, up to high

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 →

  • high Memory Poisoning · line 150
    Skill manipulates agent memory, state, or stored context. Memory corruption can alter personality, override safety rules, or cause unpredictable behavior.
    Fix: Protect agent memory and state from modification by untrusted content. Use read-only memory for critical instructions and validate all state changes.
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 $0.00077 $0.02305
Opus 5.5 $0.00031 $0.00922
Sonnet 5.5 $0.00015 $0.00461
Haiku 4.5 $0.00008 $0.00231

Measured 27d ago against content hash 0770ac6c1a63, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

test-deep 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 27d 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.

skills/test-deep/SKILL.md · 246 lines

How it starts

The opening of the file, as written. The whole thing — 246 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Test Deep — Context-Aware Test Orchestration

Supplementary Agent

When test failures occur, dispatch background triage:

Agent({ description: "Analyze test failure root cause and suggest fixes", subagent_type: "verify-app", prompt: Analyze the following test failure: <failure output> Identify root cause and suggest minimal fix. })

Trigger

  • Keywords: context-aware testing, smart test, test orchestration, test triage, test failure analysis, test deep, run relevant tests

When NOT to Use

Scenario Alternative
Writing new tests /post-dev-test
Reviewing test coverage /codex-test-review
Generating unit tests /codex-test-gen
Full manual test run /verify
Code review /codex-review-fast

Prohibited Actions

❌ git add | git commit | git push — per @rules/git-workflow.md

This skill runs tests and may apply safe fixers, but does not commit. To commit, offer the menu per rules/git-workflow.md § Proactive Offer — a commit option on any real branch, a push option only where review-state.js offer allows one — and invoke /smart-commit --execute on selection; never print the command for the user to copy.

Workflow

flowchart TD
    U[User: /test-deep] --> S[Phase 0: Test Selection]
    S --> |git diff mapping| T[Test Targets]
    S --> |no mapping| F1[Framework --changedSince]
    S --> |low confidence| F2[Full Suite]
    T --> L[Phase 1: Progressive Ladder]
    F1 --> L
    F2 --> L
    L --> |unit| R1[Run Unit Tests]
    R1 --> |pass| R2[Run Integration Tests]
    R1 --> |fail| TR[Phase 2: Triage Pipeline]
    R2 --> |pass| R3[Run E2E Tests]
    R2 --> |fail| TR
    R3 --> |pass| DONE[All Pass]
    R3 --> |fail| TR
    TR --> P[Parser: Structured Tags]
    P --> LLM[LLM: Root Cause + Action]
    LLM --> FC[Phase 3: Fixer Catalog Lookup]
    FC --> SG{Safety Gate}
    SG --> |safe| AUTO[Auto-run Fix]
    SG --> |side-effect| ASK[AskUserQuestion]
    SG --> |destructive| BLOCK[Manual Only]
    AUTO --> L
    ASK --> |approved| L

Read the full file on GitHub · 246 lines

Files

What ships with it

3 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. 27d ago Changed 0770ac6c1a63
  2. 1mo ago First seen · 246 lines · 77 tokens per session scan A e17a79ace932

Subscribe to this mod's changes

test-deep is a skill published in the GitHub repository sd0xdev/sd0x-harness (194 stars, last pushed 15d ago), licensed MIT. It adds 77 tokens to every session and 2,305 once invoked, about $0.0003 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 2026-09-03.