DEV: add Knowledge Assistant (RAG) agent type to agent builder

[mich-elle-luna]

Adds a third agent type — Knowledge Assistant — to the interactive agent builder, alongside the existing Recommendation Engine and Conversational Assistant. Includes Python and Node.js templates with Redis-native hybrid retrieval, semantic caching, session memory, and citations.

• Python template: single redis-py client (decode_responses=False), redisvl for index creation only, FT.SEARCH hybrid query with vector-only fallback, load_directory() helper, idempotent sample doc ingestion
• Node.js template: node-redis v4, same hybrid search pattern, loadDirectory() helper, ft.info() guard to skip re-ingestion on restart
• agent-builder.js: adds rag type to CONFIG, enables JavaScript alongside Python, fixes root-relative template URL, adds third suggestion chip
• agent-builder.html: adds Knowledge Assistant chip to initial message
• _index.md: updated to mention three agent types and JS support

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Note

Low Risk
Changes are limited to static docs, Hugo shortcode, client-side builder JS, and example templates—no production auth or data paths.

Overview
Adds a Knowledge Assistant (RAG) as a third agent type in the interactive agent builder, with docs and UI updated to list three agent types and to advertise JavaScript alongside Python for code generation.

The builder flow now includes a Knowledge Assistant suggestion chip, rag in CONFIG (keywords, default name KnowledgeAssistant), and JavaScript as a first-class language path (not Python-only). Template loading uses Hugo-injected window.AGENT_TEMPLATE_BASE instead of HUGO_BASEURL for fetching rag_agent (and other) templates.

New Python and Node.js rag_agent templates implement document chunking/embedding, RediSearch hybrid retrieval (text pre-filter + KNN with vector fallback), TTL semantic cache, session history in Redis lists, and cited answers; both ship sample Redis docs and skip re-ingestion when the doc index is already populated.

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[github-actions]

Staging links:
https://redis.io/docs/staging/agent-builder-rag/develop/ai/agent-builder/

[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}

[dwdougherty]

The complete example isn't displayed and it isn't downloadable or available for cut-and-paste. This kind of rings a bell - like we had this problem once before during initial development. 🤷🏻‍♂️

[dwdougherty]

The RAG example looks to be complete for both Python and JavaScript. But the other two show incomplete JavaScript code. I'm seeing these kinds of errors in the Chrome debugger's console:

Template file not found: /docs/staging/agent-builder-rag/code/agent-templates/javascript/recommendation_agent.js (404)

So what the JavaScript is showing is the default code that lives somewhere (in the static/js/agent-builder.js file maybe?).

[mich-elle-luna]

ah thanks, those are the new templates that are in my other PR I think

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

JavaScript missing non-RAG templates

Medium Severity

The builder now treats JavaScript as fully supported for every agent type, but only a rag_agent.js template exists under javascript/. Recommendation and conversational choices still fetch recommendation_agent.js or conversational_agent.js, get a 404, and silently fall back to the generic stub with a TODO instead of the real Redis agent examples users expect.

 

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