Kasetto

Kasetto can sync user-defined slash commands (a.k.a. custom prompt templates) into every agent that supports them. Commands are authored once in Claude-Code-style Markdown with YAML frontmatter, then transformed on the fly into each agent's native format.

Source format

A command repository contains a commands/ directory. Files are Markdown with YAML frontmatter:

---
description: Review the given pull request.
argument-hint: <pr-number>
allowed-tools: Bash, Read
model: claude-opus-4-7
---
Review PR $ARGUMENTS and call out anything risky.

Subdirectories under commands/ become :-separated namespaces:

commands/commit.md → commit
commands/git/commit.md → git:commit
commands/git/work/status.md → git:work:status

Config

commands:
  - source: https://github.com/me/my-commands
    ref: v1.0
    sub-dir: commands      # optional - subdirectory inside the source repository
    commands: "*"          # discover all, or list explicit entries below
 
  - source: https://github.com/acme/monorepo
    commands:
      - review-pr          # namespaced name from discovery
      - name: deploy
        path: ops          # → ops/deploy.md in the source

The commands field accepts the same shapes as mcps:

"*" — discover every .md file under commands/.
A list of namespaced names (git:commit, review-pr).
A list of { name, path } objects to load from custom subdirectories.

Per-agent output formats

Kasetto rewrites each command into the format expected by the destination agent:

Agent	Global directory	Project directory	Format
claude-code	`~/.claude/commands/`	`.claude/commands/`	Markdown + frontmatter
cursor	—	`.cursor/commands/`	Markdown (body only)
windsurf	`~/.codeium/windsurf/global_workflows/`	`.windsurf/workflows/`	Markdown + frontmatter
cline	—	`.clinerules/workflows/`	Markdown (body only)
opencode	`~/.config/opencode/commands/`	`.opencode/commands/`	Markdown + frontmatter
continue	`~/.continue/prompts/`	`.continue/prompts/`	`.prompt` file
github-copilot	—	`.github/prompts/`	`.prompt.md`
amp	`~/.config/amp/commands/`	`.agents/commands/`	Markdown + frontmatter
roo	`~/.roo/commands/`	`.roo/commands/`	Markdown + frontmatter
augment	`~/.augment/commands/`	`.augment/commands/`	Markdown + frontmatter
junie	—	`.junie/commands/`	Markdown + frontmatter
openhands	—	`.openhands/microagents/`	Markdown + frontmatter
codex	`~/.codex/prompts/`	—	Markdown + frontmatter
gemini-cli	`~/.gemini/commands/`	`.gemini/commands/`	TOML

Agents not listed (antigravity, aider, warp, replit, openclaw, trae, kiro-cli, goose) are skipped silently for commands.

Continue Dev's .prompt files get an invokable: true preamble injected automatically, and Kasetto best-effort rewrites $ARGUMENTS to Continue's {{{ input }}} placeholder.

Stale-file safety

Kasetto only deletes files it claims to own in the lock file. Pre-existing user-authored files in the same directory are preserved even if a command is removed from your config.

Slash Commands

Source format

Config

Per-agent output formats

Stale-file safety

On this page