xchwan opened a new pull request, #76437: URL: https://github.com/apache/airflow/pull/76437
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---
**Description:**
```markdown
Large values in `DagRun.conf` are loaded into the Execution API server, the
task supervisor and the task process when a task starts. The discussion on the
linked issue concluded that `conf` is meant for small metadata (a path, a table
name, an ID) and that tasks should read large data from external storage based
on it, instead of changing the task startup path.
This adds a note to the "Passing Parameters when triggering Dags" section of
the Dag run docs so users find that guidance where `dag_run.conf` is
introduced.
related: #74025
Verified with `breeze build-docs --package-filter apache-airflow
--one-pass-only`; the build succeeded and the note appears in the rendered
`core-concepts/dag-run.html`.
---
##### Was generative AI tooling used to co-author this PR?
- [X] Yes (Claude Code)
Generated-by: Claude Code following [the
guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions)
```
**Commit message** (when you decide to commit):
```
Document that Dag run conf is meant for small metadata
```
---
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