Historyofmarket

What it does

When your agent uses it

• Tasks that involve Stock and market analysis

Example prompts

• “/historyofmarket”

Requirements

• Python 3

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

1. 1CAPE (Shiller PE) desde 1871 — el unico skill del repo con PE10
2. 2Drawdowns con causa — cada drawdown incluye el evento que lo
3. 3Driver decomposition — descompone el retorno anual en rerating
4. 4GICS reclassification — impacto de los cambios de sector GICS 2018
5. 5Reconstitucion historica — los scripts permiten reconstruir

What it can do on your machine

Read from SKILL.md and the folder at commit 5156f81. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 3 files in scripts/ (Python), which the agent can run.

  Shell commands in SKILL.md call:

  • curl

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • historyofmarket.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Historyofmarket loads about 1.6k tokens when it runs, and up to ~7.6k if it reads all its reference files. Until then it costs about 88 tokens; SKILL.md has 447 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~88

When it runs · the whole SKILL.md, loaded when a task matches

~1.6k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~7.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from gauss314/skills at commit 5156f81, republished under its MIT licence (© gauss314). 447 words, ~1,592 tokens.

name

historyofmarket

description

History of Market (historyofmarket.com) — API publica con 88 datasets historicos de indices US desde 1871. S&P 500 (price, CAPE, EPS, drawdowns, changes, constituents), Nasdaq Composite/Nasdaq 100 (price, volatility, VXN, changes), Dow Jones, SOX/SMH, sector ETFs (XLK, XLF), Magnificent 7 y macro. Sin API key, CORS libre, CC BY 4.0.

license

MIT

# S&P 500 — century closes
curl https://historyofmarket.com/api/sp500/century.json

# Shiller CAPE
curl https://historyofmarket.com/api/sp500/pe.json

# Drawdowns historicos con causa
curl https://historyofmarket.com/api/sp500/drawdowns.json

# Constituyentes actuales S&P 500
curl https://historyofmarket.com/api/sp500/constituents.json

# Cambios historicos S&P 500 (adds/removes)
curl https://historyofmarket.com/api/sp500/changes.json

# Nasdaq 100 constituyentes actuales
curl https://historyofmarket.com/api/nasdaq/100.json

# Mag 7 concentracion en S&P 500
curl https://historyofmarket.com/api/mag7/concentration.json

# NBER recessions
curl https://historyofmarket.com/api/recessions.json

skills/historyofmarket/
├── SKILL.md
├── assets/
│   └── endpoints.json        ← snapshot de todos los 88 endpoints
├── references/
│   ├── SP500_METHODOLOGY.md  ← S&P 500: elegibilidad, earnings test, cambios
│   ├── NASDAQ_100_METHODOLOGY.md
│   ├── DRAWDOWN_VOLATILITY.md
│   ├── VALUATION_METRICS.md  ← CAPE, forward PE, driver decomp, ROE
│   ├── SECTOR_ETFS.md        ← XLK, XLF, GICS reclass, holdings
│   ├── MAGNIFICENT7.md       ← Mag 7, concentration, AI capex, lineage
│   └── BROADER_MARKET.md     ← Dow, SOX, recessions, yield curve
└── scripts/
    ├── reconstitute_sp500.py  ← reconstruir miembros S&P 500 a fecha dada
    ├── reconstitute_ndx.py    ← reconstruir miembros NDX a fecha dada
    └── sector_rotation.py     ← rotacion sectorial XLK vs XLF vs SPY

© gauss314, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 11 other files (scripts, references, assets) in skills/historyofmarket of gauss314/skills.

• SKILL.md
• assets/endpoints.json
• references/BROADER_MARKET.md
• references/DRAWDOWN_VOLATILITY.md
• references/MAGNIFICENT7.md
• references/NASDAQ_100_METHODOLOGY.md
• references/SECTOR_ETFS.md
• references/SP500_METHODOLOGY.md
• references/VALUATION_METRICS.md
• scripts/reconstitute_ndx.py
• scripts/reconstitute_sp500.py
• scripts/sector_rotation.py

Open the folder on GitHubat commit 5156f81