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.
npx agentmods add skills/understudy-ai/understudy/trellonpx skills add understudy-ai/understudy --skill trellogit clone --depth 1 https://github.com/understudy-ai/understudyWhat 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 | $0.00019 | $0.00854 |
| Opus 5 | $0.00010 | $0.00427 |
| Sonnet 5 | $0.00004 | $0.00171 |
| Haiku 4.5 | $0.00002 | $0.00085 |
Grade A, and why
trello scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
All commands use curl to hit the Trello REST API. This is a copy
84% identical to trello — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Trello Skill
Manage Trello boards, lists, and cards directly from Understudy.
Setup
- Get your API key: https://trello.com/app-key
- Generate a token (click "Token" link on that page)
- Set environment variables:
export TRELLO_API_KEY="your-api-key" export TRELLO_TOKEN="your-token"
Usage
All commands use curl to hit the Trello REST API.
List boards
curl -s "https://api.trello.com/1/members/me/boards?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" | jq '.[] | {name, id}'
List lists in a board
curl -s "https://api.trello.com/1/boards/{boardId}/lists?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" | jq '.[] | {name, id}'
List cards in a list
curl -s "https://api.trello.com/1/lists/{listId}/cards?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" | jq '.[] | {name, id, desc}'
Create a card
curl -s -X POST "https://api.trello.com/1/cards?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" \
-d "idList={listId}" \
-d "name=Card Title" \
-d "desc=Card description"
Move a card to another list
curl -s -X PUT "https://api.trello.com/1/cards/{cardId}?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" \
-d "idList={newListId}"
Add a comment to a card
curl -s -X POST "https://api.trello.com/1/cards/{cardId}/actions/comments?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" \
-d "text=Your comment here"
Archive a card
curl -s -X PUT "https://api.trello.com/1/cards/{cardId}?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" \
-d "closed=true"
Notes
- Board/List/Card IDs can be found in the Trello URL or via the list commands
- The API key and token provide full access to your Trello account - keep them secret!
- Rate limits: 300 requests per 10 seconds per API key; 100 requests per 10 seconds per token;
/1/membersendpoints are limited to 100 requests per 900 seconds
Examples
# Get all boards
curl -s "https://api.trello.com/1/members/me/boards?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN&fields=name,id" | jq
# Find a specific board by name
curl -s "https://api.trello.com/1/members/me/boards?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" | jq '.[] | select(.name | contains("Work"))'
# Get all cards on a board
curl -s "https://api.trello.com/1/boards/{boardId}/cards?key=$TRELLO_API_KEY&token=$TRELLO_TOKEN" | jq '.[] | {name, list: .idList}'
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 First seen · 96 lines · 19 tokens per session scan A 60b0a197dbe7
trello is a skill published in the GitHub repository understudy-ai/understudy (456 stars, last pushed 2mo ago), licensed MIT. It adds 19 tokens to every session and 854 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 84% identical to trello, differing in 6 lines, and is treated as a copy.
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