diff --git a/AGENTS.md b/AGENTS.md
index 14c8bd6..58dfa61 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -2,6 +2,11 @@
 
 Agent-focused guidance for the DialectOS Spanish dialect translation system.
 
+## Public Agent Skill
+- `skills/dialectos/SKILL.md` is the public skill for this repo.
+- Invoke `$dialectos` in compatible agent hosts for regional Spanish localization, markdown/API-doc preservation, locale JSON validation, glossary enforcement, formality checks, gender-neutral language, and launch certification.
+- Keep the skill aligned with `packages/cli/README.md`, `packages/mcp/README.md`, provider setup, and certification commands when those surfaces change.
+
 ## Project Structure
 
 pnpm monorepo with 7 workspace packages under `packages/`:
diff --git a/README.md b/README.md
index a66e003..459335b 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ Translate, detect, and adapt content across **25 regional Spanish variants** whi
 [📖 Documentation](https://github.com/KyaniteLabs/DialectOS#readme) ·
 [🚀 Quick Start](#quick-start) ·
 [🛠️ MCP Tools](#mcp-tools) ·
+[Agent Skill](#agent-skill) ·
 [📦 Packages](#packages) ·
 [🤝 Contributing](CONTRIBUTING.md) ·
 [📋 Roadmap](ROADMAP.md)
@@ -45,6 +46,10 @@ Translate, detect, and adapt content across **25 regional Spanish variants** whi
 
 **Best-fit searches:** Spanish dialect translation MCP server, Spanish localization QA, Model Context Protocol translation tool, i18n validation CLI, regional Spanish translator, glossary enforcement, AI localization audit, Spanish launch certification.
 
+## Agent Skill
+
+DialectOS includes a public agent skill at [`skills/dialectos/SKILL.md`](skills/dialectos/SKILL.md). Use `$dialectos` in compatible agent hosts when you want an agent to choose the right MCP or CLI workflow for regional Spanish translation, markdown preservation, locale-file validation, glossary enforcement, register checks, and launch-readiness QA.
+
 ## Spanish Launch Certification
 
 DialectOS is available as a paid Spanish localization launch audit. We certify your Spanish docs, app strings, support macros, or locale files across target dialects and deliver an MQM-aligned launch-readiness report.
diff --git a/docs/llms.txt b/docs/llms.txt
index e682910..d477f39 100644
--- a/docs/llms.txt
+++ b/docs/llms.txt
@@ -10,12 +10,17 @@ DialectOS helps AI agents and localization teams translate, validate, and certif
 - MCP localization workflows
 - Launch-readiness audits for Spanish products
 - Glossary enforcement and adversarial QA
+- Agent skill workflows for regional Spanish localization and QA
 
 ## Key paths
 - `README.md`: public overview and quick start
 - `docs/`: implementation and certification documentation
+- `skills/dialectos/SKILL.md`: public agent skill for MCP and CLI localization workflows
 - `packages/`: TypeScript packages
 - `audits/`: sample and release certification artifacts
 
+## Agent skill
+Invoke `$dialectos` in compatible agent hosts when the user needs regional Spanish translation, markdown/API-doc preservation, locale JSON validation, glossary enforcement, formality checks, gender-neutral language, or Spanish launch certification.
+
 ## Keywords
 Spanish dialect translation, MCP server, Model Context Protocol, localization QA, i18n validation, glossary enforcement, regional Spanish, Spanish launch certification.
diff --git a/llms.txt b/llms.txt
index e682910..d477f39 100644
--- a/llms.txt
+++ b/llms.txt
@@ -10,12 +10,17 @@ DialectOS helps AI agents and localization teams translate, validate, and certif
 - MCP localization workflows
 - Launch-readiness audits for Spanish products
 - Glossary enforcement and adversarial QA
+- Agent skill workflows for regional Spanish localization and QA
 
 ## Key paths
 - `README.md`: public overview and quick start
 - `docs/`: implementation and certification documentation
+- `skills/dialectos/SKILL.md`: public agent skill for MCP and CLI localization workflows
 - `packages/`: TypeScript packages
 - `audits/`: sample and release certification artifacts
 
+## Agent skill
+Invoke `$dialectos` in compatible agent hosts when the user needs regional Spanish translation, markdown/API-doc preservation, locale JSON validation, glossary enforcement, formality checks, gender-neutral language, or Spanish launch certification.
+
 ## Keywords
 Spanish dialect translation, MCP server, Model Context Protocol, localization QA, i18n validation, glossary enforcement, regional Spanish, Spanish launch certification.
diff --git a/skills/dialectos/SKILL.md b/skills/dialectos/SKILL.md
new file mode 100644
index 0000000..f76eb28
--- /dev/null
+++ b/skills/dialectos/SKILL.md
@@ -0,0 +1,72 @@
+---
+name: dialectos
+description: Use DialectOS for Spanish dialect translation, localization QA, i18n locale-file validation, glossary enforcement, register/formality checks, gender-neutral language, and launch certification across regional Spanish variants through MCP or CLI.
+---
+
+# DialectOS
+
+Use DialectOS when an agent needs regional Spanish localization that preserves structure and checks quality, not generic translation. It supports 25 Spanish dialect variants, glossary enforcement, markdown preservation, locale-file workflows, and adversarial quality gates.
+
+## Start Here
+
+- Read `../../README.md` for quick start, provider setup, supported workflows, and certification commands.
+- Read `../../packages/cli/README.md` for CLI commands.
+- Read `../../packages/mcp/README.md` for MCP tools and client configuration.
+- Use `../../llms.txt` for a compact public summary when another agent needs project context.
+
+## Choose A Surface
+
+- MCP: best when an agent host needs tools such as `translate_markdown`, `translate_text`, `detect_missing_keys`, `check_formality`, `search_glossary`, or `list_dialects`.
+- CLI: best for local docs, README translation, locale JSON validation, benchmark runs, certification, and report generation.
+- Demo/server workflows: use only when the user explicitly wants the browser demo or local provider testing.
+
+## Workflow
+
+1. Identify source type: plain text, markdown, API docs, README, locale JSON, glossary, or certification artifact.
+2. Identify target dialects such as `es-MX`, `es-AR`, `es-CO`, `es-ES`, `es-PR`, or the user-specified set.
+3. Preserve structure. For markdown, API docs, and locale JSON, use DialectOS structure-aware commands/tools rather than generic translation.
+4. Apply QA:
+   - validate semantic correctness,
+   - check placeholder and key preservation,
+   - enforce glossary terms,
+   - check formal/informal register,
+   - run adversarial or document certification for launch-critical work.
+5. Report dialect-specific risks plainly: semantic drift, register mismatch, regional term mismatch, placeholder loss, glossary conflict, or launch readiness.
+
+## CLI Examples
+
+```bash
+dialectos translate "Hello world" --dialect es-MX
+dialectos translate-readme README.md --dialect es-AR --output README.ar.md
+dialectos translate-api-docs api.md --dialect es-CO --output api.co.md
+dialectos validate --source "Click the button" --translated "Haz clic en el boton" --dialect es-MX
+dialectos validate --source-file en.json --translated-file es-MX.json --dialect es-MX --format json
+dialectos i18n detect-missing ./locales/en.json ./locales/es.json
+dialectos dialects list
+```
+
+## MCP Setup
+
+```json
+{
+  "mcpServers": {
+    "dialectos": {
+      "command": "pnpm",
+      "args": [
+        "dlx",
+        "https://github.com/KyaniteLabs/DialectOS/releases/download/v0.3.0/dialectos-mcp-0.3.0.tgz"
+      ],
+      "env": {
+        "ALLOWED_LOCALE_DIRS": "/path/to/locales"
+      }
+    }
+  }
+}
+```
+
+## Guardrails
+
+- Do not collapse all Spanish into generic "Spanish"; always name the target dialect.
+- Do not translate code, placeholders, links, JSON keys, or markdown structure unless the DialectOS workflow explicitly says it is safe.
+- Use `strict` policy or certification workflows for launch-critical docs, app strings, support macros, and customer-facing copy.
+- Treat provider outputs as candidates until validation passes.
diff --git a/skills/dialectos/agents/openai.yaml b/skills/dialectos/agents/openai.yaml
new file mode 100644
index 0000000..a575a51
--- /dev/null
+++ b/skills/dialectos/agents/openai.yaml
@@ -0,0 +1,7 @@
+interface:
+  display_name: "DialectOS"
+  short_description: "Spanish dialect localization QA"
+  default_prompt: "Use $dialectos to translate, validate, and QA this content for the target Spanish dialects."
+
+policy:
+  allow_implicit_invocation: true