diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -259,6 +259,7 @@ Third-party plugins built by the community. [PRs welcome](#contributing)!
 - [Nightshift](https://github.com/orwa-mahmoud/nightshift) - Accountable, time-bounded Codex shifts with a persistent punch list, parked decisions, and reviewable run history.
 - [Off the Wall](https://github.com/toranalytics/off-the-wall) - Quotes your own past corrections back to Codex, word for word, before each answer; `otw report` shows what you correct most from your local history, and subagent routing names a cheaper model per subagent. No API key.
 - [Oh My Cassette](https://github.com/Cassette-Editor/oh-my-cassette) - Turn raw local clips into a finished cut by chatting: beat-synced edits, auto-matched music, subtitles, and transitions through a local stdio MCP server, with a timeline delta and contact-sheet preview every turn before anything renders.
+- [oh-my-openspec](https://github.com/alexeyco/oh-my-openspec) - Spec-driven development workflow for Codex CLI and OpenCode, with planning, parallel task execution, and mechanical OpenSpec validation.
 - [Ontoly](https://github.com/0xsarwagya/ontoly-codex-plugin) - Deterministic Software Graph workflows for Codex: architecture review, dependency analysis, request tracing, configuration analysis, and impact analysis.
 - [Open Dynamic Workflows](https://github.com/Suraj1235/open-dynamic-workflows) - Local-first MIT dynamic multi-agent workflows for Codex, OpenCode, Antigravity, Cursor, and VS Code with a daemon, MCP bridge, Codex skills, OpenCode plugin, and bring-your-own-model support.
 - [Personal Data Protection](https://github.com/AltByteSG/personal-data-protection-skill) - Engineer-facing personal-data-protection compliance reference — Singapore PDPA, Thailand PDPA, Indonesia UU PDP, Malaysia PDPA (Act 709 + 2024 Amendments), Philippines DPA — organised by where in the stack each obligation lands, with checklists, breach-response runbook, and a developer-view divergence table across all five.