asciinema-cast-format skillA
asciinema-cast-format is agent-read markdown (skill) from terrylica/cc-skills: Asciinema v3 .cast file format reference. TRIGGERS - cast format, asciicast spec, event codes, parse cast file..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# asciinema-cast-format Reference documentation for the asciinema v3 .cast file format (asciicast v2 specification). > **Platform**: All platforms (documentation only) > **Self-Evolving Skill**: This skill improves through use. If instructions are wrong, parameters drifted, or a workaround was needed — fix this file immediately, don't defer. Only update for real, reproducible issues. ## When to Use This Skill Use this skill when: - Parsing or inspecting .cast file structure - Understanding NDJSON header and event formats - Building tools that read or write .cast files - Debugging recording issues or format errors - Learning the asciicast v2 specification --- ## Format Overview Asciinema v3 uses NDJSON (Newline Delimited JSON) format: - Line 1: Header object with recording metadata - Lines 2+: Event arrays with timestamp, type, and data --- ## Header Specification The first line is a JSON object with these fields: | Field | Type | Required | Description | | ----------- | ------ | -------- | ------------------------------------------- | | `version` | int | Yes | Format version (always 2 for v3 recordings) | …
Read the whole file at its exact version.
How to install
mdr add terrylica/cc-skills/asciinema-cast-format@git:20260401.b664eafmdr add terrylica/cc-skills/asciinema-cast-format@sha256:0dee628c6dadf1c9Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_5lc2yzrjlbxpotza)
1 badge views in 30 days
Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260401.b664eaf latest | 2026-04-01 | b664eaf | 7,850 B | A | view · diff |
| git:20260401.6be22af | 2026-04-01 | 6be22af | 7,628 B | A | view · diff |
| git:20260131.1a586f8 | 2026-01-31 | 1a586f8 | 7,058 B | A | view · diff |
| git:20260131.fb0e0bb | 2026-01-31 | fb0e0bb | 6,779 B | A | view · diff |
| git:20260131.ed2f3f2 | 2026-01-31 | ed2f3f2 | 5,633 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7850 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
terrylica/cc-skills · 74 stars · license MIT · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5lc2yzrjlbxpotza GET https://markdownregistry.com/api/v1/resolve?ref=terrylica/cc-skills/asciinema-cast-format GET https://markdownregistry.com/api/v1/blob/0dee628c6dadf1c964e5437ef87647f9c933afd5bdb158a3a94184d0e13a8518
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