lark-event

A tool for listening to real-time events from Feishu, such as new messages, reactions, task changes, meeting status changes, and generated meeting records. Events are delivered as a stream of newline-separated JSON records.

In plain words
What is it for?
Use it to list available event types, inspect an event’s data fields, consume matching events, filter each event, set time or count limits, and check or stop the local event service.
Why use it?
It lets an agent react to changes as they happen instead of repeatedly checking Feishu. Limits by event count or time can stop a listener automatically.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/larksuite/cli/lark-event
Any agent
npx skills add larksuite/cli --skill lark-event
Clone the repo
git clone --depth 1 https://github.com/larksuite/cli

Made for: Claude Code, Codex.

Per session 118 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,828 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00118 $0.02828
Opus 5 $0.00059 $0.01414
Sonnet 5 $0.00024 $0.00566
Haiku 4.5 $0.00012 $0.00283

Measured 3d ago against content hash e82b31451938, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

lark-event 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 3d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/lark-event/SKILL.md · 160 lines

How it starts

The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Lark Events

Prerequisite: Read ../lark-shared/SKILL.md first for authentication, --as user/bot switching, Permission denied handling, and safety rules.

Core commands

Command Purpose
lark-cli event list [--json] List all subscribable EventKeys
lark-cli event schema <EventKey> [--json] Show an EventKey's params and output schema
lark-cli event consume <EventKey> [flags] Blocking consume; events → stdout NDJSON
lark-cli event status [--json] [--fail-on-orphan] Inspect the local bus daemon status
lark-cli event stop [--all] [--force] Stop the bus daemon

Common flags

Flag Description
--param key=value / -p Business params (repeatable; comma-separated for multi-value). Unknown keys fail with valid names listed inline
--jq <expr> jq expression to filter / transform each event; empty output skips the event
--max-events N Exit after N events. Default 0 = unlimited
--timeout D Exit after duration D (e.g. 30s, 2m). Default 0 = no timeout. Whichever of --max-events / --timeout fires first wins
--output-dir <dir> Write each event as a file (relative paths only; prevents traversal)
--quiet Suppress ready/exit markers and per-event stderr diagnostics, including drop warnings. This can hide event loss. AI should not use this — it removes readiness and integrity signals
--as user|bot|auto Identity for the session (see lark-shared)

Examples

# Default: stream every event for the key (no filter, no projection)
lark-cli event consume im.message.receive_v1 --as bot

# List every EventKey of one domain (the authoritative, always-current catalog)
lark-cli event list --domain vc --json

# Grab one sample event to inspect payload shape
lark-cli event consume im.message.receive_v1 --max-events 1 --timeout 30s --as bot

# Run for 10 minutes then auto-exit
lark-cli event consume im.message.receive_v1 --timeout 10m --as bot

# Consume multiple EventKeys concurrently (one shape per process, no dispatcher)
lark-cli event consume im.message.receive_v1          --as bot > receive.ndjson &
lark-cli event consume im.message.reaction.created_v1 --as bot > reaction.ndjson &
wait

Read the full file on GitHub · 160 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 160 lines · 118 tokens per session scan A e82b31451938

Subscribe to this mod's changes

lark-event is a skill published in the GitHub repository larksuite/cli (16,925 stars, last pushed yesterday), licensed MIT. It adds 118 tokens to every session and 2,828 once invoked, about $0.0006 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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