Cross-language parity

Go, Ruby, Rust, Python, JVM, and .NET adapters must reach parity with the JavaScript/TypeScript adapters for core story semantics, the doc model, artifact outputs, and agent-consumable workflows.

Parity dimensions

Dimension	Required outcome	JS/TS baseline	Non-JS status
Behavior semantics	Given/When/Then/And/But keywords, auto-And for repeated keywords, explicit but()	Vitest/Jest/Playwright/Cypress adapters	Implemented; verified via RawRun fixtures and pnpm run verify:*
Doc model	Same doc entry kinds and schema meaning (json, table, code, section, link, mermaid, screenshot, html, custom, note, tag, …)	Full surface in JS adapters	Implemented where host allows; gaps must be documented
Artifact outputs	RawRun JSON → StoryReport v1 via formatters CLI	Reporter rawRunPath + formatters	RawRun default .executable-stories/raw-run.json; format with executable-stories format
Agent workflow	StoryReport JSON + list --list-format json index	Agent artifact contract	Same formatter pipeline for all languages
Verification	Per-language verify script + formatter acceptance tests	Example apps + pnpm quality	verify:go, verify:pytest, verify:rust, verify:junit5, verify:xunit, verify:ruby

Status values used in release review:

• required — must match JS/TS unless impossible on the host framework
• intentional divergence — documented host limitation (must appear in README feature matrix)
• in progress — tracked gap with owner and target release

Intentional divergences (today)

Area	JS/TS	Non-JS	Rationale
Init API	story.init(task) (Vitest), story.init() (Jest), fixture-aware Playwright	Language-native init (es.Init(t, …), ExecutableStories.init, …)	Framework-native first — no shared interpreter
Reporter integration	In-process Node reporters	Write RawRun at end of test run	Host runtime differs
ESLint plugins	Per-framework plugins	None (Ruby/Go use native linters)	Host tooling
Cypress doc.story override	Cypress-only title override	N/A	Cypress-specific legacy path

Verification commands

From repo root (requires language toolchain):

pnpm run verify:go
pnpm run verify:pytest
pnpm run verify:rust
pnpm run verify:junit5
pnpm run verify:xunit
pnpm run verify:ruby
./scripts/verify-all.sh

Each script:

1. Runs the adapter example or package tests
2. Asserts RawRun structure
3. Validates schema via executable-stories validate
4. Runs formatter pipeline (HTML + Markdown + StoryReport JSON + list index)

Formatter package tests also load cross-language RawRun fixtures (schemas/examples/go.json, rust.json, pytest.json, junit5.json, dotnet.json) and assert StoryReport v1 validation.

Release gate

Before releasing adapter or formatter changes:

1. No regression against this matrix without an explicit intentional divergence note
2. Update README feature matrix when adding doc kinds or scenario options
3. Extend verify scripts or acceptance fixtures when adding a new language or artifact field

Agent parity

Agents consume the same artifacts regardless of source language:

executable-stories format .executable-stories/raw-run.json --format story-report-json --output-dir reports --output-name index
executable-stories list .executable-stories/raw-run.json --list-format json > reports/scenarios-index.json

Optional MCP: MCP server guide.