---
title: Changelog
description: Release history for Specdiff and Envlock.
url: https://pr-1-7abef52380a8.thally.app/changelog
---

# Changelog

Release history for Specdiff and Envlock.

## v0.1.0

Initial release of the Seamline toolkit.

### Specdiff

- `@specdiff/core` 0.1.0 — breaking-change detection for JSON Schema and
  OpenAPI documents with 45 rules, direction-aware severity, three output
  formats (text, JSON, Markdown), and RFC 6901 pointer helpers. Zero runtime
  dependencies.
- `@specdiff/cli` 0.1.0 — the `specdiff` command for comparing documents,
  listing rules, and gating CI on breaking changes.
- `@specdiff/mcp` 0.1.0 — stdio MCP server with `specdiff_compare`,
  `specdiff_explain_rule`, `specdiff_list_rules`, and `specdiff_format` tools.

### Envlock

- `@envlock/core` 0.1.0 — typed environment contracts for Node.js with 10
  field types, `parseEnv`/`loadEnv`, dotenv parser, `.env.example` renderer,
  `diffEnv`, `redact`, and `describeSchema`. Zero runtime dependencies.
- `@envlock/cli` 0.1.0 — the `envlock` command: `check`, `example`, `diff`,
  `inspect`, and `init`.
- `@envlock/mcp` 0.1.0 — stdio MCP server with `envlock_check`,
  `envlock_inspect`, `envlock_render_example`, `envlock_diff`, and
  `envlock_explain_issue` tools, plus a schema resource template.