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docs: document CHECKLY_RUN_FILE_MAX_BYTES and the Outdated agent badge (checkly/agent 8.12.0) - #746

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docs-release/2026-10-28-agent-8-12-0

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@hlenke

@hlenke hlenke commented Oct 29, 2026 •

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Agent 8.12.0 adds the CHECKLY_RUN_FILE_MAX_BYTES setting, which limits the size of run files such as Playwright reports that the agent uploads, and private locations now mark agents older than 8.12.0 as Outdated. This PR adds the setting to the environment variable table and the badge to the update section of platform/private-locations/agent-configuration.mdx, and adds a line to the 8.12.0 entry in change-log.mdx.

Verified end to end against the released version.

Touches the same page as #500, #734; merge order may matter.

🤖 Generated with Claude Code

…e (checkly/agent 8.12.0)

Agent 8.12.0 reads a new environment variable, CHECKLY_RUN_FILE_MAX_BYTES, that caps the
size of the files it reads from a Browser or Multistep check run and uploads, such as the
Playwright report. The agent configuration page now lists the variable with its proven
default (2147483647 bytes), the omitted-report log line, the 2 GiB cap and the 14 MiB
fallback for an invalid value. The v8.12.0 changelog entry gets a bullet for it.

Since the 8.12.0 release the API and the private location page flag agents on an older
version as Outdated (isOutdated: true in runningAgents). The "Updating the agent container"
section now says so.

Proof: release-watch/2026-10-28/run3/agent-8.12.0 (docker runs of checkly/agent:8.12.0
against a mock API, probes inside the image, 8.11.0 as control, local API and webapp on
monorepo 5858d7e03f with seeded agent heartbeats).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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