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[Agents] Add a Harness concept and move Runtime up the sidebar - #33975

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@mattzcarey mattzcarey commented Oct 4, 2026 •

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Adds a Harness page to Concepts and moves Runtime up the sidebar, directly under Concepts.

The concept page explains what a harness is, a model in a loop with a transcript, tools, skills, extensions, and an API to get data in and out, and where its pieces run:

  • the loop and the session live in the Durable Object, and the hands attach as tools
  • a Cloudflare Computer workspace is one set of tools to the harness, but spans Durable Objects (files), Dynamic Workers (code), and Containers (Linux)
  • a CLI harness such as Claude Code runs its loop in a container while the Durable Object keeps the session
    It also explains that Agents SDK harnesses take input the same way, recommends starting with Pi, explains where Think and OpenCode fit, and lists the capabilities for building your own loop. The Harnesses section index links to it.

Internal links resolve and the pages compile as MDX.

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@mattzcarey mattzcarey changed the title [Agents] Rewrite the core Agents docs around the Lifecycle and capabilities [Agents] Rewrite the core Agents docs around harnesses Oct 6, 2026
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@mattzcarey This draft pull request has had no activity for 3 days. It will close after 7 days of inactivity. Transition to ready for review if ready. A codeowner can comment /draft-never-stale to keep it open.

@mattzcarey
mattzcarey force-pushed the docs/agents-move-agent-class branch from cf3e766 to 688b126 Compare October 12, 2026 16:01
@mattzcarey
mattzcarey force-pushed the docs/agents-lifecycle-core branch from 328ca86 to 5e8407c Compare October 12, 2026 16:01
@mattzcarey
mattzcarey marked this pull request as ready for review October 12, 2026 16:02
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Review coverage

✅ The ownership area is covered.

✅ 1 area already covered
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3 files changed
irvinebroque
CODEOWNERS mappings for displayed areas (1)
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/src/content/docs/agents/ @irvinebroque, @rita3ko, @cloudflare/ai-agents, @cloudflare/dev-plat-leads, @cloudflare/product-owners

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AI Review

✅ Reviewed f3f77d7 · 0 findings · incremental

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  • /review Run a review now.
  • /full-review Review the entire PR diff.
  • /disable-auto-review Stop automatic reviews.
  • /rebase Rebase against production.

@mattzcarey
mattzcarey force-pushed the docs/agents-move-agent-class branch from 688b126 to 3a4d6f5 Compare October 13, 2026 18:09
@mattzcarey
mattzcarey requested review from a team, G4brym and mchenco as code owners October 13, 2026 18:09
@mattzcarey
mattzcarey force-pushed the docs/agents-lifecycle-core branch from eb46cb5 to e90cb4c Compare October 13, 2026 18:10
@mattzcarey
mattzcarey force-pushed the docs/agents-move-agent-class branch from 3a4d6f5 to 9261941 Compare October 27, 2026 11:49
@mattzcarey
mattzcarey force-pushed the docs/agents-lifecycle-core branch from 48b938a to 74489c4 Compare October 27, 2026 11:49
@mattzcarey
mattzcarey added this pull request to stack #34632 October 27, 2026 12:16
@mattzcarey
mattzcarey force-pushed the docs/agents-lifecycle-core branch from 74489c4 to e966810 Compare October 27, 2026 12:16
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mattzcarey enabled auto-merge October 27, 2026 12:54
auto-merge was automatically disabled October 27, 2026 13:00

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@mattzcarey
mattzcarey added this pull request to the merge queue Oct 27, 2026
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github-merge-queue Bot removed this pull request from the merge queue due to a conflict with the base branch Oct 27, 2026
Base automatically changed from docs/agents-move-agent-class to production October 27, 2026 13:10
@mattzcarey
mattzcarey force-pushed the docs/agents-lifecycle-core branch from eeae823 to 38bcf02 Compare October 29, 2026 17:38
@mattzcarey mattzcarey changed the title [Agents] Rewrite the core Agents docs around harnesses [Agents] Add a Harnesses concept and move Runtime up the sidebar Oct 29, 2026
@github-actions github-actions Bot removed product:changelog product:agent-memory Related to Agent Memory product labels Oct 29, 2026
@mattzcarey
mattzcarey removed this pull request from stack #34632 October 29, 2026 17:56
@mattzcarey mattzcarey changed the title [Agents] Add a Harnesses concept and move Runtime up the sidebar [Agents] Add a Harness concept and move Runtime up the sidebar Oct 29, 2026
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