cli-builder SKILL.md skillA
cli-builder from magnus919/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add magnus919/agent-skills/cli-builder@git:20260901.d919354Pins git:20260901.d919354 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- magnus919/agent-skills
- Path
cli-builder/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260901.d919354, committed Sep 1, 2026
- First version recorded
- Jul 11, 2026
- Size
- 4,940 bytes
- Repository stars
- 140
- License
- MIT
Build or refactor agent-facing CLI tools with non-interactive commands, stable --help and --json contracts, idempotent operations, and --dry-run previews. Use for CLI design, agent-friction refactors, output/exit-code debugging, or automation safety. Do not use for GUI/TUI design, conversational tools, MCP server design, or general API architecture; use api-design-and-evolution for the latter.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# CLI Builder Treat a CLI as a contract between the tool and the agent. The contract includes command names, `--help`, flags, output schemas, exit codes, stderr, and previews. Keep this file as the workflow; load the linked references only when their specialized guidance is needed. ## When to Use - Build a new CLI that an agent will discover and call. - Refactor prompts, ambiguous commands, parser-hostile output, or false success codes. - Add or review `--json`, `--dry-run`, `--yes`, idempotency, or lazy authentication. ## One Workflow ### 1. Discover the real contract Define one CLI per service (except services sharing vendor authentication). Inspect real non-health read endpoints before coding, verify the actual authentication header and response shape, and capture the command tree and failure cases. Do not invent flags from API documentation alone. For HTTP clients, read [the Python API client pattern](references/python-api-client.md). Choose Bash for local wrappers and filesystem pipelines. Choose Python for HTTP, JSON, authentication state, or three-level command trees. ### 2. Build a predictable surface …
Read the whole file at its exact version.
How to install
mdr add magnus919/agent-skills/cli-builder@sha256:04b8f8f832c0fc64The line at the top of this page pins the label git:20260901.d919354, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_xib5ewmqezdvi47i)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 11, 2026 and Sep 1, 2026, about one every 13 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260901.d919354 latest | 2026-09-01 | d919354 | 4,940 B | A | view · diff |
| git:20260826.2619ba3 | 2026-08-26 | 2619ba3 | 20,374 B | A | view · diff |
| git:20260826.ff1dab9 | 2026-08-26 | ff1dab9 | 20,007 B | A | view · diff |
| git:20260711.637c12d | 2026-07-11 | 637c12d | 20,015 B | A | view · diff |
| git:20260711.a5f7e74 | 2026-07-11 | a5f7e74 | 20,014 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 (4940 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
magnus919/agent-skills · 140 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xib5ewmqezdvi47i GET https://markdownregistry.com/api/v1/resolve?ref=magnus919/agent-skills/cli-builder GET https://markdownregistry.com/api/v1/blob/04b8f8f832c0fc645f7c8c50f247fb7e477ca7001d2f946aaef887ddbfce991e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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