substitution

AI Agent

Skill body substitution engine.

Replaces $ARGUMENTS, $ARGUMENTS[N], $N, ${PRAISON_SKILL_DIR}, and ${PRAISON_SESSION_ID} placeholders inside a SKILL.md body before it is sent to the LLM.

Compatible aliases: ${CLAUDE_SKILL_DIR} and ${CLAUDE_SESSION_ID} mirror the Claude Code variables so existing Claude Code skills work unchanged.

This module is pure Python and has no optional dependencies.

Render a SKILL.md body with placeholders substituted.

Name	Value
`_INDEXED_ARG_RE`	`re.compile('\\$ARGUMENTS\\[(\\d+)\\]')`
`_SHORT_ARG_RE`	`re.compile('(?<![A-Za-z0-9_])\\$(\\d+)\\b')`

Name

Value

_INDEXED_ARG_RE

re.compile('\\$ARGUMENTS\\[(\\d+)\\]')

_SHORT_ARG_RE

re.compile('(?<![A-Za-z0-9_])\\$(\\d+)\\b')

Guide

Reference

substitution • AI Agent SDK

substitution

Import

Functions

render_skill_body()

Constants

​substitution

​Import

​Functions

render_skill_body()

​Constants

substitution

Import

Functions

Constants