docs: add agent runtime primer

[mnajafian-nv]

Overview

Adds a first-time Agent Runtime Primer before Quick Start so new agent application developers can understand NeMo Flow’s runtime model before writing code.

• I confirm this contribution is my own work, or I have the right to submit it under this project's license.
• I searched existing issues and open pull requests, and this does not duplicate existing work.

Details

• Adds docs/getting-started/agent-runtime-primer.md.
• Explains scopes, managed tool/LLM calls, middleware, events, subscribers/exporters, and plugins at a conceptual level.
• Clarifies that NeMo Flow does not replace agent frameworks, NeMo Agent Toolkit, model providers, application logic, or observability backends.
• Links the primer before Quick Start from the docs index.

Where should the reviewer start?

Start with docs/getting-started/agent-runtime-primer.md, then check the navigation update in docs/index.md.

Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)

• Relates to #

Summary by CodeRabbit

• Documentation
  • Added Agent Runtime Primer documentation covering NeMo Flow runtime components including scopes, managed tool and LLM calls, middleware, events, and plugins.
  • Updated documentation index and navigation to include the new Agent Runtime Primer guide.

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• docs/getting-started/agent-runtime-primer.md
• docs/index.md

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🪛 LanguageTool

docs/getting-started/agent-runtime-primer.md

[style] ~13-~13: To elevate your writing, try using a synonym here.
Context: ...s, traces, and exporters. That makes it hard to answer basic production questions: w...

(HARD_TO)

🔇 Additional comments (2)

docs/getting-started/agent-runtime-primer.md (1)

1-82: LGTM!

docs/index.md (1)

60-60: LGTM!

Also applies to: 65-65, 151-151

---

Walkthrough

This PR adds a new "Agent Runtime Primer" documentation page that explains NeMo Flow's runtime scope and boundaries for agent applications. The primer is then integrated into the main documentation index to guide readers through the learning path.

Changes

Agent Runtime Primer Documentation

Layer / File(s)	Summary
Agent Runtime Primer page and navigation updates docs/getting-started/agent-runtime-primer.md, docs/index.md	New primer page introduces NeMo Flow's runtime components (scopes, managed calls, middleware, events, plugins) and clarifies boundaries. Main index updated with primer entry in reading-path table and Getting Started toctree, with adjusted terminal learning path link.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• NVIDIA/NeMo-Flow#140: Both PRs are documentation-only updates to docs/index.md that add new pages to the Getting Started navigation and reading path guidance.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	Title follows Conventional Commits format with correct type (docs), concise imperative summary, under 72 characters, and no trailing period.
Description check	✅ Passed	Description includes all required sections: Overview with confirmation checkboxes, Details with specific file changes, reviewer guidance, and Related Issues section.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[mnajafian-nv]

Closing this PR because #141 landed the NeMo Relay rename and this branch now conflicts with the new docs baseline.

I will reopen the agent runtime primer from fresh main with updated terminology and current docs paths so the replacement PR is easier to review.