promptscript（promptscript 前端）

PromptScript Language Guide

PromptScript is a domain-specific language that compiles .prs files into native instruction formats for AI coding assistants (GitHub Copilot, Claude Code, Cursor, Antigravity, Factory AI, OpenCode, Gemini CLI). One source of truth, multiple outputs.

File Structure

A .prs file is made of blocks. Order doesn't matter except @meta should come first by convention.

# Comments start with #

@meta { ... }           # Required metadata
@inherit @path          # Single inheritance (optional)
@use @path [as alias]   # Imports/mixins (optional, multiple)

@identity { ... }       # AI persona
@context { ... }        # Project context
@standards { ... }      # Coding conventions
@restrictions { ... }   # Hard rules
@shortcuts { ... }      # Command aliases
@knowledge { ... }      # Reference documentation
@skills { ... }         # Reusable skill definitions
@agents { ... }         # Subagent definitions
@params { ... }         # Template parameters
@guards { ... }         # File globs and priorities
@local { ... }          # Private config (not committed)
@extend path { ... }    # Modify imported blocks
@custom-name { ... }    # Arbitrary named blocks

Content Types

PromptScript has three content types inside blocks:

Text Content

Use triple quotes (three double-quote characters) to wrap multiline text. Text is automatically dedented - leading whitespace from source indentation is stripped. Use for prose, markdown, or freeform content.

Example: @identity with a text block describing an AI persona starting with "You are..."

Object Content (key-value pairs)

@context {
  project: "My App"
  team: "Frontend"
  monorepo: {
    tool: "Nx"
    packageManager: "pnpm"
  }
}

Values can be strings (quoted or unquoted), numbers, booleans, nested objects, or arrays.

Array Content

@standards {
  code: [
    "Use strict TypeScript",
    "Named exports only"
  ]
}

@restrictions {
  - "Never use any type"
  - "Never commit secrets"
}

Mixed Content

Blocks can contain both object properties and text in the same block. Place the triple-quoted text block alongside key-value pairs.

Block Reference

@meta (required)

@meta {
  id: "project-id"        # Required: unique identifier
  syntax: "1.0.0"         # Required: syntax version (semver)
  org: "Company Name"     # Optional
  team: "Frontend"        # Optional
  tags: [react, ts]       # Optional
  params: {               # Optional: template parameters
    projectName: string
    port: number = 3000
    debug?: boolean
    framework: enum("react", "vue") = "react"
  }
}

@identity

Defines AI persona. Start with "You are..." for consistent output across all formatters. Contains a triple-quoted text block with the persona description.

@context

Project context with structured properties (project, team, languages, runtime) plus optional triple-quoted text for architecture details, diagrams, etc.

@standards

Category-based conventions. Any category name is valid:

@standards {
  typescript: ["Strict mode", "No any type"]
  naming: ["Files: kebab-case.ts", "Classes: PascalCase"]
  git: {
    format: "Conventional Commits"
    types: [feat, fix, docs, refactor, test, chore]
  }
}

@restrictions

Hard rules as a list of dash-prefixed strings:

@restrictions {
  - "Never expose API keys"
  - "Never commit secrets to version control"
  - "Always validate user input"
}

@shortcuts

Simple strings appear as documentation. Objects with prompt: true generate executable prompt/command files for GitHub Copilot and Cursor:

@shortcuts {
  "/review": "Review code for quality"
  "/test": {
    prompt: true
    description: "Write unit tests"
    content: (triple-quoted text with instructions)
  }
}

@skills

Reusable skill definitions with metadata:

@skills {
  commit: {
    description: "Create git commits"
    trigger: "commit, git commit"
    disableModelInvocation: true
    userInvocable: true
    allowedTools: ["Bash", "Read"]
    content: (triple-quoted text with skill instructions)
  }
}

Properties: description (required), content (required), trigger, disableModelInvocation, userInvocable, allowedTools, context ("fork" or "inherit"), agent, requires, inputs, outputs.

Parameterized Skills

Skills in .promptscript/skills/<name>/SKILL.md support template parameters via YAML frontmatter. Define params in frontmatter and use {{variable}} in content:

---
name: review
description: 'Review {{language}} code for {{standard}}'
params:
  language:
    type: string
  standard:
    type: string
    default: 'best practices'
---
Review the code using {{language}} conventions following {{standard}}.

Pass values in @skills block:

@skills {
  review: {
    description: "Review code"
    language: "typescript"
    standard: "strict mode"
  }
}

Non-reserved properties (anything other than description, content, trigger, userInvocable, allowedTools, disableModelInvocation, context, agent, requires, inputs, outputs) are treated as skill parameter arguments.

Skill Dependencies

Skills can declare dependencies on other skills via requires:

@skills {
  deploy: {
    description: "Deploy service"
    requires: ["lint-check", "test-suite"]
    content: (triple-quoted text)
  }
}

The validator (PS016) checks that required skills exist, detects self-references, and catches circular dependency chains.

Skill Contracts (Inputs/Outputs)

Skills can declare typed inputs and outputs in SKILL.md frontmatter:

---
name: security-scan
description: 'Scan for vulnerabilities'
inputs:
  files:
    description: 'Files to scan'
    type: string
  severity:
    description: 'Minimum severity'
    type: enum
    options: [low, medium, high]
    default: medium
outputs:
  report:
    description: 'Scan report'
    type: string
  passed:
    description: 'Whether scan passed'
    type: boolean
---

Field types: string, number, boolean, enum (with options list). The validator (PS017) checks field types, ensures enum fields have options, and warns if param names collide with input names.

Shared Resources

Skills in a folder can share common resources via .promptscript/shared/:

.promptscript/
  shared/
    templates.md         # Shared across all skills
    style-guide.md
  skills/
    review/
      SKILL.md           # Gets @shared/templates.md, @shared/style-guide.md
    deploy/
      SKILL.md           # Also gets shared resources

Files in shared/ are automatically included in every skill with @shared/ prefix.

@agents

Custom subagent definitions. Compiles to .claude/agents/ for Claude Code, .github/agents/ for GitHub Copilot, .factory/droids/ for Factory AI, etc.

@agents {
  code-reviewer: {
    description: "Reviews code quality"
    tools: ["Read", "Grep", "Glob", "Bash"]
    model: "sonnet"
    permissionMode: "default"
    content: (triple-quoted text with agent instructions)
  }
}

Supports mixed models per agent: specModel sets a different model for Specification/planning mode (GitHub, Factory), specReasoningEffort sets reasoning effort for the spec model (Factory only, values: "low", "medium", "high").

Factory AI droids support additional properties: model (any model ID or "inherit"), reasoningEffort ("low", "medium", "high"), and tools (category name like "read-only" or array of tool IDs).

@knowledge

Reference documentation as triple-quoted text. Used for command references, API docs, and other material that should appear in the output.

@params

Template parameter definitions with types: string, number, boolean, enum("a", "b"). Optional parameters use ? suffix. Defaults use = value.

@guards

File glob patterns and priority rules for path-specific instructions.

@local

Private local configuration. Not included in compiled output or committed to git.

Inheritance and Composition

@inherit (single, linear)

One per file. Child blocks merge on top of parent:

@inherit @company/frontend-team
@inherit ./parent
@inherit @stacks/react-app(projectName: "my-app", port: 3000)

@use (multiple, mixins)

Import and merge fragments:

@use @core/security
@use @core/quality
@use ./local-config
@use @core/typescript as ts   # alias enables @extend access

Merge rules:

• Text: concatenated with deduplication
• Objects: deep merged (target wins on conflicts)
• Arrays: unique concatenation

@extend (modify imported blocks)

Requires an aliased @use:

@use @core/typescript as ts

@extend ts.standards {
  testing: { coverage: 95 }
}

Parameterized Inheritance (Template Variables)

Use {{variable}} placeholders in a parent/template file, and pass values from the child file via @inherit or @use with (key: value) syntax.

IMPORTANT: Variables are NOT set from promptscript.yaml or CLI. They are passed from one .prs file to another through @inherit or @use.

Step 1: Create the template (parent file with params in @meta):

# base.prs — reusable template
@meta {
  id: "service-template"
  syntax: "1.0.0"
  params: {
    serviceName: string
    port?: number = 3000
  }
}

@identity {
  """
  You are working on {{serviceName}} running on port {{port}}.
  """
}

Step 2: Inherit with values (child file passes params):

# project.prs — concrete project
@meta { id: "user-api" syntax: "1.0.0" }

@inherit ./base(serviceName: "user-api", port: 8080)

After compilation, {{serviceName}} becomes user-api and {{port}} becomes 8080.

The same works with @use:

@use ./base(serviceName: "auth-service") as auth

Parameter types: string, number, boolean, enum("a", "b"). Optional params use ? suffix. Defaults use = value. Missing required params produce a compile error.

Multi-service pattern — reuse one template across many projects:

services/
  base.prs                          # template with params
  user-api/
    promptscript.yaml               # source: project.prs
    project.prs                     # @inherit ../base(serviceName: "user-api")
  auth-service/
    promptscript.yaml
    project.prs                     # @inherit ../base(serviceName: "auth-service")

Configuration: promptscript.yaml

Auto-injection

This skill is automatically included when compiling with prs compile. No manual copying needed. To disable, set includePromptScriptSkill: false in your promptscript.yaml.

id: my-project
syntax: "1.1.0"
description: "My project description"
input:
  entry: .promptscript/project.prs
  include: ['.promptscript/**/*.prs']
targets:
  github:
    version: full      # simple | multifile | full
  claude:
    version: full
  cursor:
    version: standard
  antigravity:
    version: frontmatter
  factory:
    version: full
  windsurf:             # 31 additional agents supported
    version: simple
  cline:
    version: simple
registry:
  git: https://github.com/org/registry.git
  ref: main

CLI Commands

prs init                    # Initialize project
prs init --migrate          # Initialize + migration skills
prs compile                 # Compile to all targets
prs compile --watch         # Watch mode
prs validate --strict       # Validate syntax
prs import CLAUDE.md        # Import existing AI instructions
prs import --dry-run        # Preview import conversion
prs pull                    # Update registry
prs diff --target claude    # Show compilation diff

Output Targets

38 supported targets. Key examples:

Formatter Documentation

For detailed information about each formatter's output paths, supported features, quirks, and example outputs:

• Full formatter reference: docs/reference/formatters/ (7 dedicated pages + index of all 37)
• llms-full.txt: Available at the docs site root — contains all documentation in a single file for LLM consumption
• Dedicated pages exist for: Claude Code, GitHub Copilot, Cursor, Antigravity, Factory AI, Gemini CLI, OpenCode
• All 37 formatters indexed at: docs/reference/formatters/index.md with output paths, tier, and feature flags

Project Organization

Typical modular structure:

.promptscript/
  project.prs      # Entry: @meta, @inherit, @use, @identity, @agents
  context.prs      # @context (architecture, tech stack)
  standards.prs    # @standards (coding conventions)
  restrictions.prs # @restrictions (hard rules)
  commands.prs     # @shortcuts and @knowledge

The entry file uses @use./context, @use./standards, etc. to compose them.

Common Mistakes

1. Missing @meta block - every.prs file needs @meta with id and syntax
2. Multiple @inherit - only one per file; use @use for additional imports
3. @extend without alias - requires prior @use... as alias
4. Unquoted strings with special chars - quote strings containing :, #, {, }
5. Forgetting to compile - .prs changes need prs compile to take effect
6. Triple quotes inside triple quotes - not supported; describe content textually instead
7. Using {{var}} in the root file without @inherit - template variables only work in a parent file that defines params in @meta, with values passed by the child via @inherit./parent(key: value) or @use./fragment(key: value). They are NOT set from promptscript.yaml or CLI flags

Migrating Existing AI Instructions to PromptScript

Automated: prs import

The fastest way to convert existing AI instructions to PromptScript:

prs import CLAUDE.md                    # Convert a single file
prs import .github/copilot-instructions.md
prs import AGENTS.md --output ./imported.prs
prs import --dry-run CLAUDE.md          # Preview without writing

prs import automatically:

• Detects the source format (Claude, GitHub Copilot, Cursor, Factory, etc.)
• Maps content to appropriate PromptScript blocks (@identity, @standards, etc.)
• Generates a valid .prs file with @meta block
• Preserves the original intent and structure

Supported source formats:

• CLAUDE.md (Claude Code)
• .github/copilot-instructions.md (GitHub Copilot)
• .cursorrules or .cursor/rules/*.mdc (Cursor)
• AGENTS.md (Factory AI / Codex)
• .clinerules (Cline), .roorules (Roo Code)
• .windsurf/rules/*.md (Windsurf)
• Any Markdown-based AI instruction file

Manual Migration

For complex migrations or when prs import needs refinement:

After import, split into modular files (context.prs, standards.prs, etc.) and compose with @use in project.prs. Run prs validate --strict then prs compile to verify output matches the original.