calendar

calendar is a skill for Claude Code, Codex from yjwong/lark-cli. It costs 40 tokens per session (2,158 once invoked), scanned A, original, MIT.

A calendar-management skill for Lark, a workplace collaboration and calendar service. It can work with events, invitations, schedules, availability, and meeting times.

In plain words
What is it for?
Use it to view events, check conflicts, find open meeting slots, create or change events, delete events, and respond to invitations.
Why use it?
It removes the need to manage calendar details manually through separate commands. Checking the current time first helps avoid mistakes with dates and time ranges.

Skill for Claude CodeCodex

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

Good fit Use it to view events, check conflicts, find open meeting slots, create or change events, delete events, and respond to invitations.

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Install with agentmods
npx agentmods add skills/yjwong/lark-cli/calendar
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 yjwong/lark-cli --skill calendar
Clone the repo
git clone --depth 1 https://github.com/yjwong/lark-cli

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 calendar

README.md
[![agentmods](https://agentmods.dev/badge/skills/yjwong/lark-cli/calendar/github.svg)](https://agentmods.dev/skills/yjwong/lark-cli/calendar)
Your own site
<a href="https://agentmods.dev/skills/yjwong/lark-cli/calendar"><img src="https://agentmods.dev/badge/skills/yjwong/lark-cli/calendar/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 calendar

Your own site · 80×15
<a href="https://agentmods.dev/skills/yjwong/lark-cli/calendar"><img src="https://agentmods.dev/badge/skills/yjwong/lark-cli/calendar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,158 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 $0.00040 $0.02158
Opus 5.5 $0.00016 $0.00863
Sonnet 5.5 $0.00008 $0.00432
Haiku 4.5 $0.00004 $0.00216

Measured 1mo ago against content hash 37ffb03087ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

calendar 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 1mo 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/calendar/SKILL.md · 263 lines

How it starts

The opening of the file, as written. The whole thing — 263 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Calendar Management Skill

Manage Lark calendar via the lark CLI.

Running Commands

Ensure lark is in your PATH, or use the full path to the binary. Set the config directory if not using the default:

lark cal <command>
# Or with explicit config:
LARK_CONFIG_DIR=/path/to/.lark lark cal <command>

Before Running Commands

Always check the current time first before running calendar commands that involve dates or times:

date '+%Y-%m-%d %H:%M:%S %Z'

This ensures you use the correct current date when constructing queries like --from, --to, --start, etc.

Commands Reference

Check Authentication

lark auth status

List Events

# Today's events with your RSVP status (recommended default)
lark cal list --rsvp

# This week with RSVP status
lark cal list --week --rsvp

# Date range (ISO 8601)
lark cal list --from 2024-01-15 --to 2024-01-20 --rsvp

# With conflict detection
lark cal list --week --detect-conflicts --buffer-minutes 15 --rsvp

# Events awaiting RSVP
lark cal list --pending --from 2024-01-15 --to 2024-01-31

# Include all attendee info (slower)
lark cal list --week --attendees

Important: Always include --rsvp when listing events to show the user's RSVP status. Highlight events where rsvp_status is needs_action.

Show Event Details

lark cal show <event-id>

Create Event

lark cal create \
  --summary "Meeting title" \
  --start 2024-01-20T14:00:00+08:00 \
  --duration 1h \
  --location "Conference Room A" \
  --description "Discussion topics" \
  --attendee [email protected] \
  --attendee [email protected] \
  --reminder 15 \
  --color "#9CA2A9" \
  --visibility private

Time format: ISO 8601 (e.g., 2024-01-20T14:00:00+08:00 or 2024-01-20) Duration formats: 30m, 1h, 1h30m Color format: Hex (e.g., #9CA2A9) Visibility: default, public, or private Attendee ability (guest permissions): none, can_see_others, can_invite_others, or can_modify_event

Read the full file on GitHub · 263 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. 1mo ago First seen · 263 lines · 40 tokens per session scan A 37ffb03087ab

Subscribe to this mod's changes

calendar is a skill published in the GitHub repository yjwong/lark-cli (54 stars, last pushed 6mo ago), licensed MIT. It adds 40 tokens to every session and 2,158 once invoked, about $0.0002 per session on Opus 5.5. 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.