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Apex Event Bus Subscriber

Category: Engineering  ·  Sub-category: engineering-misc  ·  Last updated:
Apex Platform Event subscriber runtime semantics — checkpoint-and-resume via `EventBus.TriggerContext.setResumeCheckpoint`, `EventBus.RetryableException` semantics, the 2,000-event-per-trigger default batch (10× standard DML trigger size), and `PlatformEventSubscriberConfig` for batch-size + running-user tuning. Covers the checkpoint-vs-RetryableException decision (the most common subscriber bug). NOT for declaring Platform Events themselves (use platform_events_definition skill), NOT for publishing them (apex/platform-event-publish), NOT for the basic `trigger Foo on MyEvent__e (after insert)` syntax.
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About this skill (catalog notes)

Apex Event Bus Subscriber includes at least one code block. At roughly 1,741 words the SKILL.md is on the longer end of the catalog distribution.

Source
pypi.org/project/sfskills-mcp
License
Apache-2.0
Original author
Pranav Nagrecha
Indexed lastmod
Catalog position
Engineering · engineering-misc
Indexed related skills
10

How Apex Event Bus Subscriber fits the catalog

Apex Event Bus Subscriber sits in the Engineering category under the engineering-misc sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Subscribing to Platform Events from Apex looks deceptively like writing a DML trigger. It isn't. The runtime semantics — batch size, error handling, position tracking, retry budget — are all different from before insert / after insert triggers, and getting them wrong is the most common production bug in Platform Event subscribers.

What this skill does

Apex Event Bus Subscriber is a community-contributed Claude Code skill in the engineering-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/apex-event-bus-subscriber/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Apex Event Bus Subscriber Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 146,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/apex-event-bus-subscriber
curl -L https://claudskills.com/skills/apex-event-bus-subscriber/SKILL.md \
  -o ~/.claude/skills/apex-event-bus-subscriber/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/apex-event-bus-subscriber/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/apex-event-bus-subscriber/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\apex-event-bus-subscriber\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

Frequently asked questions

How do I install the Apex Event Bus Subscriber Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/apex-event-bus-subscriber/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Apex Event Bus Subscriber skill do?
Apex Platform Event subscriber runtime semantics — checkpoint-and-resume via `EventBus.TriggerContext.setResumeCheckpoint`, `EventBus.RetryableException` semantics, the 2,000-event-per-trigger default batch (10× standard DML trigger size), and `PlatformEventSubscriberConfig` for batch-size + running-user tuning. Covers the checkpoint-vs-RetryableException decision (the most common subscriber bug). NOT for declaring Platform Events themselves (use platform_events_definition skill), NOT for publishing them (apex/platform-event-publish), NOT for the basic `trigger Foo on MyEvent__e (after insert)` syntax.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Apex Event Bus Subscriber skill?
Use Apex Event Bus Subscriber when your Claude Code task falls under the Engineering category — specifically in the engineering misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Apex Event Bus Subscriber" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the Apex Event Bus Subscriber skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Apex Event Bus Subscriber is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
Pranav Nagrecha. (2026). Apex Event Bus Subscriber [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/apex-event-bus-subscriber/
BibTeX
@misc{apex-event-bus-subscriber-2026,
  author    = {Pranav Nagrecha},
  title     = {Apex Event Bus Subscriber [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/apex-event-bus-subscriber/}
}

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Security scan

Grade A · scanned 2026-07-06 — free static scan against the OWASP Agentic Skills Top 10.

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