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/carta/plugins/update-contactnpx skills add carta/plugins --skill update-contactgit clone --depth 1 https://github.com/carta/pluginsWhat 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 | $0.00096 | $0.01046 |
| Opus 5 | $0.00048 | $0.00523 |
| Sonnet 5 | $0.00019 | $0.00209 |
| Haiku 4.5 | $0.00010 | $0.00105 |
Grade A, and why
update-contact 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.
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.
How it starts
The opening of the file, as written. The whole thing — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
Partially update an existing contact. Only fields provided are modified — this is a partial update, not a replacement. First resolve the contact ID, collect what to change, then call the update tool.
Step 1 — Resolve the contact ID
If the user provided a contact ID directly, use it and skip to Step 3.
If only a name or description was given, search first:
crm_call_tool({ "name": "crm:search_contacts", "arguments": { query: "<name>", limit: 10 } })
If multiple contacts match, present the list and ask the user to confirm which one to update (show name, title, company, and ID for each).
Step 2 — Collect what to update
Ask the user what they want to change. Updatable fields include:
| Field | Description |
|---|---|
name |
Full name |
firstName, lastName, middleName |
Name parts |
emailDetail |
Primary email; Second/Third/Fourth for additional emails |
phone |
Primary phone; businessPhone for business number |
title |
Job title |
headline |
Short bio or tagline |
location |
Work location (city, state, country) |
homeLocation |
Home location (city, state, country) |
socialLinks |
linkedinUrl, twitterUrl, githubUrl, facebookUrl |
jobs |
Work experience array — fully replaces existing jobs |
tags |
Tags array — fully replaces existing tags |
notes |
Free-text notes |
fields |
Custom field values keyed by field ID |
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 · 104 lines · 96 tokens per session scan A 299fda5226ac
update-contact is a skill published in the GitHub repository carta/plugins (12 stars, last pushed today), licensed Apache-2.0. It adds 96 tokens to every session and 1,046 once invoked, about $0.0005 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.
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