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Asciinema .cast file format reference v1.0.0

Use this resource to read, write or parse asciinema .cast recordings

New

  • 566 downloads
  • 110 likes
  • 164 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install asciinema-cast-file-reference

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent relies on the asciicast v3 format reference to read or produce .cast files: NDJSON header, event codes and absolute time calculation. You get jq parsing examples and guidance for building your own tools.

Mostly picked by

Updated November 2, 2026

Card for the “Asciinema .cast file format reference” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: format, header, event codes and timestamps
  • SKILL.md: jq parsing examples
  • references/evolution-log.md: log of corrections

Good fit for

  • You are writing a tool that reads terminal recordings
  • A .cast file does not replay correctly

Not for

    Tags

    • asciinema
    • format
    • terminal
    • recording

    About

    You say

    “Explain the event codes in this .cast file and extract its header.”

    Card for the “Asciinema .cast file format reference” skill

    Skill published by terrylica under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to read, write or parse asciinema .cast recordings
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/evolution-log.md0.7 KB
    • SKILL.md7.9 KB

    Origin and licence

    Listed unmodified

    Author
    terrylica
    Source
    github.com/terrylica/cc-skills/tree/0ca36f7260a3eb5de13a1b684509c4ecd5fe819b/plugins/asciinema-tools/skills/asciinema-cast-format
    Licence
    MIT

    Notice

    « asciinema-cast-format » (terrylica, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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