event-log

event-log is a skill for Claude Code, Codex from JansenAnalytics/claudex. It costs 23 tokens per session (846 once invoked), scanned A, original, MIT.

An append-only JSONL event log, meaning a file where each line stores one structured event. It records timestamps, event types, session IDs, summaries, and optional details so an agent can recall recent activity across sessions.

In plain words
What is it for?
Use it to record notes, notifications, and other events, then query the latest entries when a new session begins.
Why use it?
It provides continuity without requiring the agent to read every previous session log.

Skill for Claude CodeCodex

Which agent this was written for is unclear — built for openclaw. Also seen: built for openclaw.

Good fit Use it to record notes, notifications, and other events, then query the…

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Install with agentmods
npx agentmods add skills/jansenanalytics/claudex/event-log
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 JansenAnalytics/claudex --skill event-log
Clone the repo
git clone --depth 1 https://github.com/JansenAnalytics/claudex

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 event-log

README.md
[![agentmods](https://agentmods.dev/badge/skills/jansenanalytics/claudex/event-log.svg)](https://agentmods.dev/skills/jansenanalytics/claudex/event-log)
Your own site
<a href="https://agentmods.dev/skills/jansenanalytics/claudex/event-log"><img src="https://agentmods.dev/badge/skills/jansenanalytics/claudex/event-log.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 846 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 $0.00023 $0.00846
Opus 5 $0.00012 $0.00423
Sonnet 5 $0.00005 $0.00169
Haiku 4.5 $0.00002 $0.00085

Measured 3d ago against content hash 75523d5b483d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

event-log 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/event-log.cjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/event-log/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

event-log

An append-only structured JSONL event log giving Kite continuity across sessions — without reading every log file.

What it does

Writes structured events to ~/.openclaw/events.jsonl. Each event captures a timestamp, type, session ID, human-readable summary, and optional metadata. Kite can query the log at the start of any session to instantly know what happened recently.

Event file

~/.openclaw/events.jsonl

Each line is one JSON event:

{
  "ts": "2026-02-21T17:00:00Z",
  "type": "note",
  "session": "agent:main:abc",
  "summary": "Gateway auth fixed",
  "meta": {}
}

Script location

${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs

Also symlinked in skill scripts for reference:

${CLAUDE_SKILLS_DIR:-$HOME/.claude-agent/.claude/skills}/event-log/scripts/event-log.cjs

CLI usage

# Log an event
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs log \
  --type note --summary "Started working on X"

# With metadata
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs log \
  --type notification_sent \
  --summary "Sent stock alert" \
  --meta '{"channel":"telegram","topic":"stock"}'

# View last 20 events
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs tail

# View last 50
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs tail --n 50

# Events from today
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs today

# Search summaries
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs search "stock"

# Filter by type
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs type notification_sent

# Events since a date
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs since "2026-02-21"

# Stats: counts by type, today/week
node ${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs stats

Programmatic API

const { logEvent } = require("${EVENT_LOG_HOME:-$HOME/projects/event-log}/event-log.cjs");

logEvent("notification_sent", "Stock alert fired", { channel: "telegram" });
logEvent("cron_ran", "web-monitor check complete", { success: true, duration_ms: 312 });
logEvent("error", "Failed to reach Eric Bloodaxe URL", { url: "https://...", code: 503 });

Read the full file on GitHub · 123 lines

Files

What ships with it

3 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 · 123 lines · 23 tokens per session scan A 75523d5b483d

Subscribe to this mod's changes

event-log is a skill published in the GitHub repository JansenAnalytics/claudex (5 stars, last pushed 2mo ago), licensed MIT. It adds 23 tokens to every session and 846 once invoked, about $0.0001 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 2026-09-03.

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