revert(code,sdk): revert SystemPromptConfig - #4969
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This reverts commit 56c5a5e.
SystemPromptConfig
Nick Hollon (nick-hollon-lc)
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lgtm just one question i was confused by!
This was referenced Jul 22, 2026
Nick Hollon (nick-hollon-lc)
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Sydney Runkle (sydney-runkle)
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## Overview Adds the final `deepagents` v0.7.0 changelog entry, replacing the pre-release `v0.7.0a6` block. The v0.7.0 release focuses on making the harness more configurable and leaner by default. Content is sourced from the [`0.7.0b1`](https://github.com/langchain-ai/deepagents/releases/tag/deepagents%3D%3D0.7.0b1) and [`0.7.0b2`](https://github.com/langchain-ai/deepagents/releases/tag/deepagents%3D%3D0.7.0b2) release notes and grouped into Features, Optimizations, and Breaking changes. Note: the `SystemPromptConfig` item from the old a6 entry was dropped because that feature was reverted ([deepagents#4969](langchain-ai/deepagents#4969)) before the GA release. ## Type of change **Type:** Update existing documentation ## Related issues/PRs - Feature PRs: langchain-ai/deepagents#4251, #4109, #4325, #4859, #4929, #4541, #5009 ## Checklist - [x] I have read the contributing guidelines, including the language policy - [x] I have tested my changes locally (Vale: 0 errors, 0 warnings) - [x] All code examples have been tested and work correctly - [x] I have used **root relative** paths for internal links - [ ] I have updated navigation in `src/docs.json` if needed (not needed)
Nishitha M (imnishitha)
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…5056) ## Description `langchain-ai/deepagents#4969` reverted the alpha `SystemPromptConfig` (`prefix`/`base`/`suffix` dict) feature, so `system_prompt=` is a plain `str | SystemMessage` again. This drops the `SystemPromptConfig` guidance from the Python-side "System prompt" section entirely and fixes the section intro, which incorrectly claimed a built-in base prompt ships by default. Also resyncs the Python function-signature snippet (stale `SystemPromptConfig` reference) and drops the now-stale `SystemPromptConfig` link-map entry. No changelog changes. `langchain-ai/deepagentsjs` mirrored the revert (#700, #703), but kept `SystemPromptConfig` in its type union as a `@deprecated` compatibility shim slated for removal in the next major release. Dropped it from the JS signature snippet to match. **Note for reviewers:** that snippet is normally auto-generated by `scripts/sync_deepagents_signatures.py` from the live API reference site, which still lists the deprecated type — don't blindly re-run that script against this one file until deepagentsjs's next major release actually removes the shim, or it'll reintroduce `SystemPromptConfig`. ## Test Plan - [x] `make check-cross-refs` - [x] `make lint_prose FILES=...` on changed `.mdx` files Opened collaboratively by Nishitha Madhu and open-swe --------- Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com> Co-authored-by: Naomi Pentrel <5212232+npentrel@users.noreply.github.com>
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Reverts #4437 and #4516.
This was alpha functionality that we are removing in favor of #4859.