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fix(code): preflight Ollama host reachability before discovery probe - #4702

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Mason Daugherty (mdrxy) merged 3 commits into
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Jul 13, 2026
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fix(code): preflight Ollama host reachability before discovery probe#4702
Mason Daugherty (mdrxy) merged 3 commits into
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mdrxy/code/ollama-presence-preflight

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@mdrxy Mason Daugherty (mdrxy) commented Jul 13, 2026 •
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Deep Agents Code no longer logs a misleading "discovery failed" error when Ollama is not running; it now detects the daemon's absence and skips discovery quietly.

When Ollama is not installed/running, model discovery probes http://localhost:11434/api/tags, and the refused connection surfaces as a misleading Ollama model discovery failed ... Connection refused debug line. This adds a lightweight TCP presence preflight (_ollama_host_reachable) that runs before the HTTP probe: if nothing is listening, discovery is skipped quietly with an Ollama daemon not detected debug line instead. The check is best-effort — any failure (refused, DNS error, timeout, blocked sockets under pytest-socket) is treated as absent, and an unparseable host defers to the existing HTTP probe.

Made by Open SWE

@mdrxy @open-swe
fix(code): preflight Ollama host reachability before discovery probe
8d2b654 
Skip the /api/tags HTTP probe and its misleading "discovery failed ...
Connection refused" debug line when no Ollama daemon is listening (the
common case when Ollama is not installed). A lightweight TCP presence
check now runs first and logs a quiet "not detected" line instead.

Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>
@github-actions github-actions Bot added dcode Related to `deepagents-code` fix A bug fix (PATCH) internal User is a member of the `langchain-ai` GitHub organization size: S 50-199 LOC labels Jul 13, 2026
@mdrxy
Mason Daugherty (mdrxy) marked this pull request as ready for review July 13, 2026 20:13
open-swe[bot]
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Open SWE Review found 2 potential issues.

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Comment thread libs/code/deepagents_code/model_config.py Outdated
Comment thread libs/code/deepagents_code/model_config.py Outdated
@github-actions github-actions Bot added size: M 200-499 LOC and removed size: S 50-199 LOC labels Jul 13, 2026
@mdrxy
Mason Daugherty (mdrxy) merged commit 96fe71a into main Jul 13, 2026
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@mdrxy
Mason Daugherty (mdrxy) deleted the mdrxy/code/ollama-presence-preflight branch July 13, 2026 20:39
@github-actions github-actions Bot mentioned this pull request Jul 13, 2026
Merged
Mason Daugherty (mdrxy) added a commit that referenced this pull request Jul 14, 2026
@github-actions @mdrxy
release(deepagents-code): 0.1.38 (#4703)
73bd973 
> [!CAUTION]
> Merging this PR will automatically publish to **PyPI** and create a
**GitHub release**.

For the full release process, see
[`.github/RELEASING.md`](https://github.com/langchain-ai/deepagents/blob/main/.github/RELEASING.md).

---

_Release notes preview: keep this section in sync with the package
`CHANGELOG.md`. The published GitHub release body is extracted from the
merged `CHANGELOG.md` by `release.yml`, not from this PR description._

---


##
[0.1.38](deepagents-code==0.1.37...deepagents-code==0.1.38)
(2026-07-14)

### Features

* Improve `/goal` criteria UX
([#4694](#4694))
([06f46ff](06f46ff))
* Add interactive goal management
([#4693](#4693))
([64205e2](64205e2))
* Conditionally drop `TodoListMiddleware`
([#4685](#4685))
([d3a3077](d3a3077))
* Add `memory.auto_save` config flag
([#4700](#4700))
([55b60ca](55b60ca))
* Trace experimental mode in metadata
([#4705](#4705))
([22d5045](22d5045))

### Bug Fixes

* Align context diff rows with changed rows
([#4714](#4714))
([f9915db](f9915db))
* Hydrate virtualized transcript on scroll offset changes
([#4646](#4646))
([f77eeb0](f77eeb0))
* Keep TODO and edit tools expanded
([#4704](#4704))
([1d549d3](1d549d3))
* Make `/goal` completion and grading reliable
([#4691](#4691))
([9da63c6](9da63c6))
* Preflight Ollama host reachability before discovery probe
([#4702](#4702))
([96fe71a](96fe71a))
* Quiet expected non-repo `git ls-files` logging
([#4701](#4701))
([3d499db](3d499db))
* Rename `ls_agent_kind` to `ls_agent_purpose`
([#4708](#4708))
([2678b16](2678b16))
* Run MCP login during a run, queue the restart
([#4643](#4643))
([65e1ee8](65e1ee8))
* Show "Took &lt;duration&gt;" when `task` tool completes
([#4638](#4638))
([19538e0](19538e0))
* Support unambiguous `read_file` gutters
([#4711](#4711))
([2089b54](2089b54))

---

_End release notes preview._

---

> [!NOTE]
> A **New Contributors** section is appended to the GitHub release notes
automatically at publish time (see [Release
Pipeline](https://github.com/langchain-ai/deepagents/blob/main/.github/RELEASING.md#release-pipeline),
step 2).

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Mason Daugherty <github@mdrxy.com>
Marcelo5444 pushed a commit to Marcelo5444/deepagents that referenced this pull request Jul 30, 2026
@mdrxy @open-swe
fix(code): preflight Ollama host reachability before discovery probe (l…
981e7e8 
…angchain-ai#4702)

Deep Agents Code no longer logs a misleading "discovery failed" error
when Ollama is not running; it now detects the daemon's absence and
skips discovery quietly.

---

When Ollama is not installed/running, model discovery probes
`http://localhost:11434/api/tags`, and the refused connection surfaces
as a misleading `Ollama model discovery failed ... Connection refused`
debug line. This adds a lightweight TCP presence preflight
(`_ollama_host_reachable`) that runs before the HTTP probe: if nothing
is listening, discovery is skipped quietly with an `Ollama daemon not
detected` debug line instead. The check is best-effort — any failure
(refused, DNS error, timeout, blocked sockets under `pytest-socket`) is
treated as absent, and an unparseable host defers to the existing HTTP
probe.

Made by [Open
SWE](https://openswe.vercel.app/agents/c3696bf2-ea9f-2932-0d07-4ce636b8f83e)

---------

Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>
Marcelo5444 pushed a commit to Marcelo5444/deepagents that referenced this pull request Jul 30, 2026
@github-actions @mdrxy
release(deepagents-code): 0.1.38 (langchain-ai#4703)
614f73d 
> [!CAUTION]
> Merging this PR will automatically publish to **PyPI** and create a
**GitHub release**.

For the full release process, see
[`.github/RELEASING.md`](https://github.com/langchain-ai/deepagents/blob/main/.github/RELEASING.md).

---

_Release notes preview: keep this section in sync with the package
`CHANGELOG.md`. The published GitHub release body is extracted from the
merged `CHANGELOG.md` by `release.yml`, not from this PR description._

---


##
[0.1.38](langchain-ai/deepagents@deepagents-code==0.1.37...deepagents-code==0.1.38)
(2026-07-14)

### Features

* Improve `/goal` criteria UX
([langchain-ai#4694](langchain-ai#4694))
([06f46ff](langchain-ai@06f46ff))
* Add interactive goal management
([langchain-ai#4693](langchain-ai#4693))
([64205e2](langchain-ai@64205e2))
* Conditionally drop `TodoListMiddleware`
([langchain-ai#4685](langchain-ai#4685))
([d3a3077](langchain-ai@d3a3077))
* Add `memory.auto_save` config flag
([langchain-ai#4700](langchain-ai#4700))
([55b60ca](langchain-ai@55b60ca))
* Trace experimental mode in metadata
([langchain-ai#4705](langchain-ai#4705))
([22d5045](langchain-ai@22d5045))

### Bug Fixes

* Align context diff rows with changed rows
([langchain-ai#4714](langchain-ai#4714))
([f9915db](langchain-ai@f9915db))
* Hydrate virtualized transcript on scroll offset changes
([langchain-ai#4646](langchain-ai#4646))
([f77eeb0](langchain-ai@f77eeb0))
* Keep TODO and edit tools expanded
([langchain-ai#4704](langchain-ai#4704))
([1d549d3](langchain-ai@1d549d3))
* Make `/goal` completion and grading reliable
([langchain-ai#4691](langchain-ai#4691))
([9da63c6](langchain-ai@9da63c6))
* Preflight Ollama host reachability before discovery probe
([langchain-ai#4702](langchain-ai#4702))
([96fe71a](langchain-ai@96fe71a))
* Quiet expected non-repo `git ls-files` logging
([langchain-ai#4701](langchain-ai#4701))
([3d499db](langchain-ai@3d499db))
* Rename `ls_agent_kind` to `ls_agent_purpose`
([langchain-ai#4708](langchain-ai#4708))
([2678b16](langchain-ai@2678b16))
* Run MCP login during a run, queue the restart
([langchain-ai#4643](langchain-ai#4643))
([65e1ee8](langchain-ai@65e1ee8))
* Show "Took &lt;duration&gt;" when `task` tool completes
([langchain-ai#4638](langchain-ai#4638))
([19538e0](langchain-ai@19538e0))
* Support unambiguous `read_file` gutters
([langchain-ai#4711](langchain-ai#4711))
([2089b54](langchain-ai@2089b54))

---

_End release notes preview._

---

> [!NOTE]
> A **New Contributors** section is appended to the GitHub release notes
automatically at publish time (see [Release
Pipeline](https://github.com/langchain-ai/deepagents/blob/main/.github/RELEASING.md#release-pipeline),
step 2).

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Mason Daugherty <github@mdrxy.com>
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