qj-report-analyst

qj-report-analyst is a skill for Claude Code, Codex from QuantJourneyOrg/quantjourney-bt. It costs 0 tokens per session (533 once invoked), scanned A, original, Apache-2.0.

A guide to reading QuantJourney backtest reports, including summary numbers, charts, and the trade blotter, which is a record of individual trades.

In plain words
What is it for?
Use it to assess returns, risk-adjusted performance, drawdowns, tail losses, rolling results, market crises, and the timing and quality of trades.
Why use it?
It helps you tell the difference between a strategy that works consistently and one that only looks good because of a lucky period, excessive risk, or unreliable data.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to assess returns, risk-adjusted performance, drawdowns, tail losses, rolling results, market crises, and the timing and quality of trades.

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Install with agentmods
npx agentmods add skills/quantjourneyorg/quantjourney-bt/qj-report-analyst
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 QuantJourneyOrg/quantjourney-bt --skill qj-report-analyst
Clone the repo
git clone --depth 1 https://github.com/QuantJourneyOrg/quantjourney-bt

Made for: Claude Code, Codex.

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 qj-report-analyst

README.md
[![agentmods](https://agentmods.dev/badge/skills/quantjourneyorg/quantjourney-bt/qj-report-analyst/github.svg)](https://agentmods.dev/skills/quantjourneyorg/quantjourney-bt/qj-report-analyst)
Your own site
<a href="https://agentmods.dev/skills/quantjourneyorg/quantjourney-bt/qj-report-analyst"><img src="https://agentmods.dev/badge/skills/quantjourneyorg/quantjourney-bt/qj-report-analyst/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 qj-report-analyst

Your own site · 80×15
<a href="https://agentmods.dev/skills/quantjourneyorg/quantjourney-bt/qj-report-analyst"><img src="https://agentmods.dev/badge/skills/quantjourneyorg/quantjourney-bt/qj-report-analyst.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 533 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 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 $0.00000 $0.00533
Opus 5 $0.00000 $0.00267
Sonnet 5 $0.00000 $0.00107
Haiku 4.5 $0.00000 $0.00053

Measured 10d ago against content hash dbb187465423, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

qj-report-analyst 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 10d 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/qj-report-analyst/SKILL.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

QuantJourney Report Analyst

Use this skill to read a QuantJourney backtest report — the metrics, the plots, and the trade blotter — and judge whether the result is trustworthy.

Read the headline metrics first

  • CAGR — annualized return. Context, not verdict.
  • Sharpe / Sortino — risk-adjusted return; Sortino only penalizes downside. A Sharpe > 2 on a simple strategy is a red flag to investigate, not celebrate.
  • Max drawdown / Calmar — worst peak-to-trough and return-per-unit-drawdown. Ask: could you hold through that drawdown?
  • VaR / CVaR — tail loss at a confidence level (loss-positive convention).

Read the plots

  • Cumulative returns (± regime overlay) — the shape. Is the edge steady or one lucky period? Is it just long-beta?
  • Drawdown / underwater — depth and time to recover. Long underwater periods break real allocators.
  • Monthly returns heatmap — consistency vs a few dominating months.
  • Rolling Sharpe / volatility / betawhen it worked. A rolling Sharpe that collapses in recent years is a warning.
  • Crisis analysis — per-crisis return, vol, drawdown, beta (GFC, COVID, 2022). How does it behave when the market breaks?
  • Blotter — trade PnL distribution (a few big winners vs broad edge), holding-period distribution, and transaction-cost analysis (did costs eat it?).

Read the walk-forward diagnostics

  • OOS equity vs in-sample — does the edge survive out of sample?
  • Sharpe decay IS→OOS — a large drop means fit to noise.
  • Overfit ratio / efficiency traffic lights — heed the red verdicts.
  • A single good out-of-sample result is not proof of robustness.

Red flags to call out

  • Edge concentrated in one regime or a handful of trades.
  • Sharpe that vanishes once realistic costs are added.
  • High turnover with thin per-trade PnL.
  • Big in-sample / out-of-sample Sharpe decay.
  • Market-neutral book that is actually net long (check exposure).
  • Short strategy whose return is mostly the un-modeled borrow carry.

Read the full file on GitHub · 47 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. 10d ago First seen · 47 lines · 0 tokens per session scan A dbb187465423

Subscribe to this mod's changes

qj-report-analyst is a skill published in the GitHub repository QuantJourneyOrg/quantjourney-bt (53 stars, last pushed 1mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 533 tokens. 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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