OpenPeon

An open standard for coding event sounds. Any IDE, any pack, one format.

What is CESP?

The Coding Event Sound Pack Specification defines a universal format for sound packs that respond to IDE events — task completions, errors, permission prompts, and more. Write a pack once, use it everywhere.

Any IDE

Claude Code, Cursor, Codex, and more. One pack works across all tools that implement CESP.

41+ Sound Packs

From Warcraft Peons to GLaDOS to StarCraft units. Gaming nostalgia meets developer productivity.

Community Driven

Create your own pack with a single JSON manifest. Share it with the community via GitHub.

Event Categories

Category	Description	Tier
session.start	Session or workspace opens	core
task.acknowledge	Tool accepted work, is processing	core
task.complete	Work finished successfully	core
task.error	Something failed	core
input.required	Blocked, waiting for user input or approval	core
resource.limit	Rate, token, or quota limit hit	core
user.spam	User sending commands too fast	extended
session.end	Session closes gracefully	extended
task.progress	Long task still running	extended