> ## Documentation Index
> Fetch the complete documentation index at: https://docs.geometry.app/llms.txt
> Use this file to discover all available pages before exploring further.

# get_team_chemistry

> MLB team season roster Cosmic card stacks — World Series champions or postseason rosters.

<Badge color="green">Production</Badge>

<Info>
  **Status:** Production on Path C (`https://mcp.geometry.app/mcp`).
</Info>

Team-season **roster cardology** — suit mix, anchor card stacks, and related season / animal fields for a Retrosheet team code. Built for **World Series champion** and **postseason** roster scopes already in the baseball façade — not a live 40-man lookup.

<Info>
  **When to use:** historical October / World Series roster chemistry (`season_yr` + `team_code`). **Not** for a single birth date → [`get_date`](/tools/get-date). **Not** for play-level day/jersey/HR# patterns → [`get_plays_numerology`](/tools/get-plays-numerology). **Not** for live scraped rosters until that season exists in the postseason / WS spine (missing season → `team_season_not_found`).
</Info>

| | |
| - | - |
| **Required** | `season_yr` (integer) · `team_code` (Retrosheet, e.g. `LAN`, `CHA`, `NYA`) |
| **Optional** | `scope` — `ws_champion` (default) \| `postseason` · `gametype` · `include_pair_matrix` |
| **MCP URL** | `https://mcp.geometry.app/mcp` |

**Ask:**

> Use get\_team\_chemistry for 2024 LAN with scope ws\_champion.

## Example (teaching excerpt)

Live 2024 Dodgers World Series champion call (shortened):

```json theme={null}
{
  "season_yr": 2024,
  "team_code": "LAN",
  "scope": "ws_champion",
  "roster_size": 60,
  "season_animal": "dragon",
  "anchor_stacks": [
    { "card_symbol": "K♥", "count": 6 },
    { "card_symbol": "10♦", "count": 4 },
    { "card_symbol": "A♦", "count": 4 }
  ],
  "suit_mix": {
    "clubs": 40,
    "diamonds": 31.7,
    "hearts": 16.7,
    "spades": 10
  }
}
```

## Errors

| `error` | Meaning |
| - | - |
| `team_season_not_found` | No WS / postseason cosmic rows for that `season_yr` + `team_code` (e.g. future seasons not loaded) |
| `missing_season_yr_or_team_code` | Required args missing |
| `unsupported_scope` | `scope` not `ws_champion` or `postseason` |
| `invalid_season_yr` | Non-integer season |

## Notes

* Team codes are **Retrosheet** (`LAN` not `LAD`; `CHA` not `CWS`).
* Overlay individual birth dates with [`get_date`](/tools/get-date) when you have DOBs outside this tool.
* Live `tools/list` also includes Magian Age / Long Range tools; this page covers baseball roster chemistry only.

## See also

* [get\_plays\_numerology](/tools/get-plays-numerology) — play-level HR/K numerology
* [get\_date](/tools/get-date) — one date → Cosmic card
* [What you get](/payload-shapes) — tool menu


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