{"id":42529291,"url":"https://github.com/superdoc-dev/ooxml-dev","last_synced_at":"2026-04-10T00:29:10.169Z","repository":{"id":335100442,"uuid":"1133476091","full_name":"superdoc-dev/ooxml-dev","owner":"superdoc-dev","description":"Interactive OOXML (ECMA-376) reference explained by people who actually implemented it","archived":false,"fork":false,"pushed_at":"2026-03-22T00:02:47.000Z","size":878,"stargazers_count":4,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2026-04-02T08:24:51.994Z","etag":null,"topics":["documentation","docx","ecma-376","microsoft-word","office-open-xml","ooxml","reference","wordprocessingml"],"latest_commit_sha":null,"homepage":"https://ooxml.dev","language":"TypeScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/superdoc-dev.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":"AGENTS.md","dco":null,"cla":null}},"created_at":"2026-01-13T11:56:52.000Z","updated_at":"2026-03-30T08:34:30.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/superdoc-dev/ooxml-dev","commit_stats":null,"previous_names":["superdoc-dev/ooxml-dev"],"tags_count":65,"template":false,"template_full_name":null,"purl":"pkg:github/superdoc-dev/ooxml-dev","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/superdoc-dev%2Fooxml-dev","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/superdoc-dev%2Fooxml-dev/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/superdoc-dev%2Fooxml-dev/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/superdoc-dev%2Fooxml-dev/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/superdoc-dev","download_url":"https://codeload.github.com/superdoc-dev/ooxml-dev/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/superdoc-dev%2Fooxml-dev/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":31381009,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-04-03T21:40:47.592Z","status":"ssl_error","status_checked_at":"2026-04-03T21:40:05.436Z","response_time":107,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.5:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["documentation","docx","ecma-376","microsoft-word","office-open-xml","ooxml","reference","wordprocessingml"],"created_at":"2026-01-28T16:11:59.939Z","updated_at":"2026-04-03T23:03:08.095Z","avatar_url":"https://github.com/superdoc-dev.png","language":"TypeScript","readme":"\u003cimg width=\"300\" alt=\"logo\" src=\"https://github.com/user-attachments/assets/df6311a6-c050-4592-bbf1-4a2228655bc3\" /\u003e\n\n[![Web](https://img.shields.io/badge/Web-v0.1.3-blue)](https://ooxml.dev)\n[![MCP Server](https://img.shields.io/badge/MCP_Server-v0.0.1-blue)](https://api.ooxml.dev/mcp)\n[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)\n\nThe OOXML spec, explained by people who actually implemented it.\n\n## What is this?\n\nAn interactive reference for ECMA-376 (Office Open XML) built by the [SuperDoc — DOCX editing and tooling](https://superdoc.dev) team. Every page combines XML structure, live rendered previews, and implementation notes that tell you what the spec doesn't.\n\n- **Live previews** — Edit XML and see it render in real-time. Every example is a working document.\n- **Implementation notes** — Where Word diverges from the spec, what will break your code, and what to do about it.\n- **Semantic spec search** — 18,000+ spec chunks searchable by meaning via MCP server.\n\n## Why?\n\nThe ECMA-376 spec is 5,000+ pages and it lies. Word's actual behavior diverges from the standard in ways you only discover by building against it. The knowledge to implement OOXML correctly is locked inside a handful of companies that have no incentive to share it.\n\nWe faced this at SuperDoc — building a document engine on native OOXML with no roadmap beyond an unreliable spec. We wrote down everything we learned and made it public. No one should have to reverse-engineer Word alone.\n\n## MCP Server\n\nSearch the ECMA-376 spec with AI. Ask questions in natural language, get answers grounded in the actual specification.\n\n```bash\nclaude mcp add --transport http ecma-spec https://api.ooxml.dev/mcp\n```\n\nWorks with Claude Code, Cursor, and any MCP-compatible client. Three tools: `search_ecma_spec` (semantic search), `get_section` (by ID), and `list_parts` (browse structure).\n\n## Development\n\n```bash\nbun install    # Install dependencies\nbun dev        # Dev server at http://localhost:5173\nbun run build  # Production build\n```\n\n## Contributing\n\nContributions welcome. Add implementation notes, fix examples, or improve the reference.\n\n## License\n\nMIT\n\n---\n\nBuilt by 🦋 [SuperDoc — DOCX editing and tooling](https://superdoc.dev)\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsuperdoc-dev%2Fooxml-dev","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsuperdoc-dev%2Fooxml-dev","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsuperdoc-dev%2Fooxml-dev/lists"}