What is antithesis-query-logs?

A search tool for all event timelines in an Antithesis test run. Antithesis is a testing platform that runs software in a controlled, hostile simulation to expose hard-to-find failures.

Use it to find events across a run, compare failures between configurations, count separate occurrences, and investigate what happened before or after a failure.

It helps determine whether failures are independent, caused by earlier faults, or connected by a particular order of events.

antithesis-query-logs — Skill for Claude Code by antithesishq

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 antithesishq/antithesis-skills --skill antithesis-query-logs

Clone the repo

git clone --depth 1 https://github.com/antithesishq/antithesis-skills

Made for: Claude Code.

Or install antithesis-skills, the plugin that ships this one along with the rest of its 12 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/antithesishq/antithesis-skills/antithesis-query-logs/github.svg)](https://agentmods.dev/skills/antithesishq/antithesis-skills/antithesis-query-logs)

Your own site

<a href="https://agentmods.dev/skills/antithesishq/antithesis-skills/antithesis-query-logs"><img src="https://agentmods.dev/badge/skills/antithesishq/antithesis-skills/antithesis-query-logs/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/antithesishq/antithesis-skills/antithesis-query-logs"><img src="https://agentmods.dev/badge/skills/antithesishq/antithesis-skills/antithesis-query-logs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,242 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

Socket pass 16 May 2026
Snyk warn 16 May 2026
NVIDIA SkillSpector pass 7 Sept 2026

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.

Model	Per session	Once invoked
Fable 5.1	$0.00058	$0.02242
Opus 5	$0.00029	$0.01121
Sonnet 5	$0.00012	$0.00448
Haiku 4.5	$0.00006	$0.00224

Measured 2d ago against content hash 95c462ff3f08, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

antithesis-query-logs 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 2d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (assets/antithesis-query-logs.js, assets/build-url.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

antithesis-query-logs/SKILL.md · 229 lines

How it starts

The opening of the file, as written. The whole thing — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Antithesis Logs Explorer

Skill version: 2026-09-08 2e4a837

Purpose and Goal

Search across all timelines in an Antithesis test run to find events, correlate property failures, and answer temporal questions about ordering and causation — cascade elimination, fault correlation, root cause hypothesis testing, and any "if X happened before Y" query.

The Logs Explorer is distinct from the per-example log viewer used in triage. The triage log viewer shows one timeline centered on one event. The Logs Explorer searches across ALL timelines in a run, supports temporal queries (preceded by, not preceded by, followed by, not followed by), and visualizes results on a multiverse map.

When to Use

Investigating whether a property failure is independent or a cascade from an earlier failure
Counting how many independent occurrences of a failure exist across timelines
Correlating failures with fault injection events
Comparing failure patterns between backend configurations
Identifying timeline clusters where failures co-occur

Prerequisites

DO NOT PROCEED if snouty is not installed. See https://raw.githubusercontent.com/antithesishq/snouty/refs/heads/main/README.md for installation options.
DO NOT PROCEED if agent-browser is not installed. See https://raw.githubusercontent.com/vercel-labs/agent-browser/refs/heads/main/README.md for installation options.
DO NOT PROCEED if agent-browser is older than version v0.23.4. You can upgrade with agent-browser upgrade.
DO NOT PROCEED if jq is not installed. See https://jqlang.org/download/ for installation options.
python3 (>= 3.10, stdlib only) for assets/build-url.py.
A completed Antithesis run. If you don't have a specific run URL, use the antithesis-triage skill's run discovery workflow to find one first.
agent-browser installed and authenticated to the Antithesis tenant

Key Concepts

Temporal query: Search for event X that is (or is not) preceded by or followed by event Y. Used to filter out cascade failures.
Multiverse map: Visualization of the timeline tree. Failures appear as dots. Clusters of dots on related timelines suggest a shared root cause.
Independent cluster count: The number of distinct timeline branches where a failure appears. "8 failures in 2 clusters" is much more informative than just "8 failures" — it tells you how many independent reproductions exist.
Session ID: Each run has a unique session ID that scopes all queries. Queries against the wrong session return no results. The session ID is embedded in the encoded search URL parameter.

Read the full file on GitHub · 229 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.

2d ago Changed 95c462ff3f08
7d ago Changed d2ebcd22821e
11d ago First seen · 229 lines · 58 tokens per session scan A e6a05f127960

Subscribe to this mod's changes

antithesis-query-logs is a skill published in the GitHub repository antithesishq/antithesis-skills (267 stars, last pushed 3d ago), licensed Apache-2.0. It adds 58 tokens to every session and 2,242 once invoked, about $0.0003 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.

Testing

research-engineer

An uncompromising Academic Research Engineer. Operates with absolute scientific rigor, objective criticism, and zero flair. Focuses on theoretical correctness, formal verification, and optimal implementation across any required technology.

davila7/claude-code-templates · 43 tokens

tika-eval-compare

Compare extracts from two Tika builds over a corpus to detect regressions in content, encoding, exceptions, and embedded-document handling. Use for "compare before/after extracts", "eval this change against the corpus".

apache/tika · 50 tokens

neuron-evaluation-engineer

Create and run AI evaluations with datasets, assertions, and output drivers in Neuron AI. Use this skill whenever the user mentions evaluation, testing AI systems, creating evaluators, dataset-driven testing, assertion-based validation, or wants to measure AI system performance. Also trigger for tasks involving…

neuron-core/neuron-ai · 77 tokens

antithesis-query-logs