## Motivation
MLX LM has given GPT OSS a shard method, but MLX does not have an update
to match.
## Changes
<!-- Describe what you changed in detail -->
## Why It Works
<!-- Explain why your approach solves the problem -->
## Test Plan
### Manual Testing
<!-- Hardware: (e.g., MacBook Pro M1 Max 32GB, Mac Mini M2 16GB,
connected via Thunderbolt 4) -->
<!-- What you did: -->
<!-- - -->
### Automated Testing
<!-- Describe changes to automated tests, or how existing tests cover
this change -->
<!-- - -->
## Motivation
Kimi K2 Thinking Pipeline RDMA was broken before.
## Why It Works
No clue tbh
## Test Plan
### Manual Testing
Kimi K2 Thinking and GPT OSS work at the same time on Pipeline RDMA.
Needs exo bench to check more thoroughly
### Automated Testing
Layer composition tests still pass.
This change uses the stronger typed ModelId, and introduces some
convenience methods. It also cleans up some code left over from #1204.
## Changes
`model_id: str -> model_id: ModelId`
`repo_id: str -> model_id: ModelId`
Introduces methods on ModelId, in particular ModelId.normalize() to
replace `/` with `--`.
This PR did introduce some circular imports, so has moved some code
around to try and limit them.
## Test Plan
Tests still pass, types still check. As this is about metadata, I
haven't tested inference.
## Motivation
The `download_progress_for_local_path` function and the "Handle local
paths" code block in `download_shard` are dead code that cannot be
reached in normal usage. The code checks if `model_id` (e.g.,
"mlx-community/Llama-3.2-3B-Instruct-4bit") exists as a filesystem path,
but model IDs are constrained to HuggingFace repo format and there's no
API pathway to pass local paths.
## Changes
- Removed `download_progress_for_local_path()` function (45 lines)
- Removed the "Handle local paths" block in `download_shard()` (7 lines)
## Why It Works
This code was added in PR #669 as part of a "feature-local-models"
branch, but the feature was never fully integrated. The check
`aios.path.exists(str(shard.model_card.model_id))` would only return
true if a directory literally named
"mlx-community/Llama-3.2-3B-Instruct-4bit" existed in the cwd, which
doesn't happen in practice. Offline caching is already handled by
`fetch_file_list_with_cache`.
## Test Plan
### Manual Testing
- Run exo normally and verify downloads still work
### Automated Testing
- Existing tests pass (this code had no test coverage)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Motivation
When `skip_download=True`, exo was logging a lot of unnecessary messages during periodic download status checks. This resulted in spammy logs that made it hard to see important messages.
## Changes
- Only log "Downloading ... with allow_patterns=..." when actually downloading (not when skip_download is true)
- Changed periodic download progress check logs from INFO to DEBUG level
## Why It Works
The `skip_download=True` parameter is used when checking download status without actually downloading. By guarding the log behind `if not skip_download:`, we avoid logging on every status check. Changing the periodic emitting logs to DEBUG level reduces noise while still keeping them available for debugging.
## Test Plan
### Manual Testing
- Run exo and observe that logs are less spammy during normal operation
- Use -v or -vv flags to see DEBUG logs when needed
### Automated Testing
- Existing tests cover this code path
## Motivation
<!-- Why is this change needed? What problem does it solve? -->
<!-- If it fixes an open issue, please link to the issue here -->
## Changes
<!-- Describe what you changed in detail -->
## Why It Works
<!-- Explain why your approach solves the problem -->
## Test Plan
### Manual Testing
<!-- Hardware: (e.g., MacBook Pro M1 Max 32GB, Mac Mini M2 16GB,
connected via Thunderbolt 4) -->
<!-- What you did: -->
<!-- - -->
### Automated Testing
<!-- Describe changes to automated tests, or how existing tests cover
this change -->
<!-- - -->
## Motivation
We have a lot of unneeded data in the model card - lets just keep the
necessary stuff and add back more data when we need it
## Test Plan
EXO still runs! (pipeline on 2)
Co-authored-by: rltakashige <rl.takashige@gmail.com>
## Motivation
Add support for GLM-4.7-Flash, a lighter variant of GLM-4.7 with the
`glm4_moe_lite` architecture. These models are smaller and faster while
maintaining good performance.
## Changes
1. **Added 4 new model cards** for GLM-4.7-Flash variants:
- `glm-4.7-flash-4bit` (~18 GB)
- `glm-4.7-flash-5bit` (~21 GB)
- `glm-4.7-flash-6bit` (~25 GB)
- `glm-4.7-flash-8bit` (~32 GB)
All variants have:
- `n_layers`: 47 (vs 91 in GLM-4.7)
- `hidden_size`: 2048 (vs 5120 in GLM-4.7)
- `supports_tensor`: True (native `shard()` method)
2. **Bumped mlx from 0.30.1 to 0.30.3** - required by mlx-lm 0.30.4
3. **Updated mlx-lm from 0.30.2 to 0.30.4** - adds `glm4_moe_lite`
architecture support
4. **Added type ignores** in `auto_parallel.py` for stricter type
annotations in new mlx-lm
5. **Fixed EOS token IDs** for GLM-4.7-Flash - uses different tokenizer
with IDs `[154820, 154827, 154829]` vs other GLM models' `[151336,
151329, 151338]`
6. **Renamed `MLX_IBV_DEVICES` to `MLX_JACCL_DEVICES`** - env var name
changed in new mlx
## Why It Works
The model cards follow the same pattern as existing GLM-4.7 models.
Tensor parallel support is enabled because GLM-4.7-Flash implements the
native `shard()` method in mlx-lm 0.30.4, which is automatically
detected in `auto_parallel.py`.
GLM-4.7-Flash uses a new tokenizer with different special token IDs.
Without the correct EOS tokens, generation wouldn't stop properly.
## Test Plan
### Manual Testing
Tested generation with GLM-4.7-Flash-4bit - now correctly stops at EOS
tokens.
### Automated Testing
- `basedpyright`: 0 errors
- `ruff check`: All checks passed
- `pytest`: 162/162 tests pass (excluding pre-existing
`test_distributed_fix.py` timeout failures)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Motivation
Certain models hang at model loading in tensor parallel.
Hopefully closes#1205
## Changes
- Load layer by layer for tensor parallel sharding
- Move eval_with_timeout to auto_parallel.py to resolve circular import.
## Why It Works
The naive way to fix this is to use load model with lazy = False and
then shard in tensor parallel. However, this requires the entire model
to be loaded into memory.
Instead, we can load layer by layer and shard after loading. There is a
very small memory footprint to this, but it is negligible.
I tried loading layer by layer after the sharding, and this allowed
model loading but got stuck at warming up.
## Test Plan
### Manual Testing
GPT OSS loads with TP and FAST SYNCH. Kimi does too.
### Automated Testing
We need to run a suite of exo_bench before merging this!
## Motivation
For thinking models like GLM-4.7, the `<think>` tag is inserted by the
tokenizer's `apply_chat_template()` into the **prompt** (input). The
model generates tokens starting *after* this tag, so `<think>` never
appears in the streamed output. The frontend expects
`<think>...</think>` tags to extract and display thinking content.
**Log evidence:**
```
[gMASK]<sop><|system|>...<|user|>...<|assistant|><think>
```
The prompt ends with `<think>`, so the model generates content after it,
never returning the opening tag.
## Changes
- Added `detect_thinking_prompt_suffix()` helper function in
`utils_mlx.py` to detect if a prompt ends with `<think>` tag
- Added `parse_thinking_models()` generator wrapper in `runner.py` that
prepends the thinking tag to the output stream
- Modified the main generation loop to use the thinking wrapper for
non-GptOssModel models when a thinking prefix is detected
- Updated test mocks to handle the new `apply_chat_template` call
## Why It Works
The solution follows the same pattern as `parse_gpt_oss()` - a generator
wrapper that transforms the output stream. When the chat template ends
with `<think>`, we prepend this tag to the first generated token so the
frontend receives the complete `<think>...</think>` structure it
expects.
## Test Plan
### Manual Testing
<!-- Hardware: (e.g., MacBook Pro M1 Max 32GB, Mac Mini M2 16GB,
connected via Thunderbolt 4) -->
<!-- What you did: -->
- Run exo: `uv run exo`
- Send a chat request to GLM-4.7:
```bash
curl http://localhost:52415/v1/chat/completions -H "Content-Type:
application/json" -d '{
"model": "mlx-community/GLM-4.7-8bit-gs32",
"messages": [{"role": "user", "content": "What is 2+2?"}],
"stream": true
}'
```
- Verify the streamed response starts with `<think>` tag
- Verify the frontend dashboard correctly shows the thinking section
collapsed
### Automated Testing
- All 72 worker tests pass: `uv run pytest src/exo/worker/`
- Type checker passes: `uv run basedpyright`
- Linter passes: `uv run ruff check`
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Ryuichi Leo Takashige <leo@exolabs.net>
## Motivation
The current `NodePerformanceProfile` is a monolithic object where every
update (even 1-second memory updates) replaces the entire profile,
touching unrelated data. Different fields update at vastly different
frequencies:
| Data | Update Frequency |
|------|------------------|
| Memory, System | 1 second |
| Thunderbolt | 5 seconds |
| Network interfaces | 10 seconds |
| Friendly name | 60 seconds |
| Model/Chip ID | Once at startup |
## Changes
Split into separate state mappings so each data type updates
independently:
- `node_identities`: Static and slow-changing data (model_id, chip_id,
friendly_name)
- `node_memory`: RAM and swap usage
- `node_system`: GPU usage, temperature, power, CPU metrics
- `node_network`: Network interface information
- `node_thunderbolt`: Thunderbolt interface identifiers
Added a backwards-compatible `node_profiles` property that reconstructs
`NodePerformanceProfile` from the granular mappings for dashboard
compatibility.
**Files modified:**
- `src/exo/shared/types/profiling.py` - Added `NodeIdentity`,
`NodeNetworkInfo`, `NodeThunderboltInfo` types
- `src/exo/shared/types/state.py` - Added 5 new mappings +
`node_profiles` property
- `src/exo/shared/apply.py` - Updated `apply_node_gathered_info` and
`apply_node_timed_out`
## Why It Works
Each info type now writes only to its specific mapping, avoiding
unnecessary updates to unrelated data. The `MacThunderboltConnections`
handler reads from `node_thunderbolt` instead of the old `node_profiles`
for RDMA connection mapping. The backwards-compatible property ensures
the dashboard continues to work unchanged.
## Test Plan
### Manual Testing
<!-- Hardware: (e.g., MacBook Pro M1 Max 32GB, Mac Mini M2 16GB,
connected via Thunderbolt 4) -->
<!-- What you did: -->
- Start exo and verify dashboard shows node info
- Verify memory/GPU updates stream correctly
- Check that node timeout properly cleans up all mappings
### Automated Testing
- All 162 existing tests pass
- basedpyright: 0 errors
- ruff check: All checks passed
- nix fmt: Applied
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Motivation
GPU timeouts often when prompt size > profile_step_size. It also happens
for seemingly random models.
## Changes
Add mx.depends for cache on the logits.
All gather at the model level rather than the layer level, reducing the
amount of data sent.
## Why It Works
mlx_lm's prefill loop only evaluates cache state, not logits.
When prompt > prefill_step_size, the all_gather is never evaluated,
causing GPU timeout.
## Test Plan
### Manual Testing
<!-- Hardware: (e.g., MacBook Pro M1 Max 32GB, Mac Mini M2 16GB,
connected via Thunderbolt 4) -->
<!-- What you did: -->
<!-- - -->
### Automated Testing
Added failing test cases and then resolved them.
The daemonAlreadyInstalled() function checked that the startup script
file existed and validated plist properties, but did not compare the
actual script content. If the setupScript constant was updated in a new
app version, the stale on-disk script would not be detected or replaced.
Added a guard clause that reads the installed script from disk and
compares it against the expected setupScript content (with whitespace
normalization). When content differs, the function returns false,
triggering the reinstallation flow with an admin privileges prompt.
Test plan:
- Installed on a cluster that had the previous network config. Got the
popup asking for permissions. After accepting I could run Kimi K2
Thinking Tensor RDMA on all 4 nodes.
## Motivation
Information gathering is tightly coupled to MacMon - we should start
generalizing our information sources so we can add more in future.
## Changes
Added a new system to gather any information. Currently, it is attached
to the Worker - though this is mostly to keep the data processing logic
simple. It could be made independent quite easily.
I also refactored topology to include different kinds of connections as
we can gather RDMA connections without having a pre-existing socket
connection, and made the relevant placement updates. We should no longer
need the network locations script in the app.
Other sources of information now include:
- static node information like "model" and "chip" (macos, "Unknown"
fallback)
- device friendly name (macos, falls back to device hostname)
- network interfaces + ips (cross platform)
- thunderbolt interfaces (macos)
- thunderbolt connections (macos)
- RAM usage (cross platform)
- per-device configuration written to EXO_HOME/config.toml
## Limitations
Model and Chip are not cross platform concepts.
We do not differentiate between unified and non-unified memory systems.
A lot of this data collection is based on simple timers. Watching the SC
store on macos is the correct way to gather some of this information,
but requires a detour into rust for macos.
## Why It Works
The InfoGatherer is a generic subsystem which returns a union of metric
datatypes. It writes them to an event, which is applied to state. It is
currently re-spawned with the worker so each cluster receives the
correct information.
As for topology, macOS identifies TB ports with a uuid in
SPThunderboltDataType, and also stores remote uuids if it can find them.
These changes read that data with the system_profiler, hopefully not so
often as to cause notable performance impacts (though this should be
tuned) but frequently enough for moderate responsiveness.
As we can identify TB connections between devices without needing ips
attached to each interface, we can remove the network setup script
(almost) completely.
## Test Plan
### Manual Testing
Spawn RDMA instances without enabling DHCP on the RDMA interfaces.
### Automated Testing
Updated the current master and shared tests to cover the topology
refactor and new events.
---------
Co-authored-by: Sami Khan <smsak99@gmail.com>
Co-authored-by: Alex Cheema <alexcheema123@gmail.com>
Co-authored-by: Jake Hillion <jake@hillion.co.uk>
Updated README.md with documentation for four new features:
- added a "Benchmarking" section documenting the exo-bench tool for
measuring model performance across different placement configurations
- documented the custom namespace feature for cluster isolation in the
macOS app section
- added a "Configuration Options" subsection explaining the --no-worker
CLI flag for coordinator-only nodes
- added a "File Locations (Linux)" subsection documenting XDG Base
Directory Specification compliance on Linux systems
Issue #930
The on_progress callback was synchronous but always invoked from async
contexts, forcing the use of send_nowait() which could raise WouldBlock
if the channel buffer was full, potentially dropping progress updates.
Changed the callback type from `Callable[[ShardMetadata,
RepoDownloadProgress], None]` to return a coroutine, updated all
implementations to be async, and replaced send_nowait() with await
send() in the worker's download progress handler.
This allows proper backpressure handling when sending download progress
events through the channel, eliminating the "Footgun!" that was
previously documented in the code.
Test plan:
- Built a DMG and ran it on one node. All existing models showed as
downloaded.
- Downloaded a new model. The progress bar on the download page worked.
- Downloaded another new model. The progress bar on the home page
worked.
## Motivation
When models output LaTeX-formatted math proofs, the dashboard was not
rendering them correctly. Issues included:
- `\documentclass`, `\begin{document}`, `\usepackage` showing as raw
text
- `$...$` inline math with complex expressions (like `\frac`, `\ldots`)
not rendering due to markdown escaping backslashes
- `\begin{align*}...\end{align*}` and other math environments showing as
raw text
- `\emph{...}`, `\textbf{...}` LaTeX formatting commands not being
converted
- `$\require{...}$` (MathJax-specific) causing KaTeX errors
- `\begin{proof}...\end{proof}` showing as raw text
## Changes
Enhanced `MarkdownContent.svelte` with comprehensive LaTeX support:
**Math extraction before markdown processing:**
- Extract `$...$`, `$$...$$`, `\(...\)`, `\[...\]` into placeholders
before markdown processes the text
- Use alphanumeric placeholders (`MATHPLACEHOLDERINLINE0END`) that won't
be interpreted as HTML tags
- Restore and render with KaTeX after markdown processing
**LaTeX document command removal:**
- Strip `\documentclass{...}`, `\usepackage{...}`, `\begin{document}`,
`\end{document}`
- Strip `\maketitle`, `\title{...}`, `\author{...}`, `\date{...}`
- Strip `\require{...}` (MathJax-specific, not KaTeX)
- Replace `tikzpicture` environments with `[diagram]` placeholder
- Strip `\label{...}` cross-reference commands
**LaTeX math environments:**
- Convert `\begin{align*}`, `\begin{equation}`, `\begin{gather}`, etc.
to display math blocks
**LaTeX text formatting:**
- `\emph{...}` and `\textit{...}` → `<em>...</em>`
- `\textbf{...}` → `<strong>...</strong>`
- `\texttt{...}` → `<code>...</code>`
- `\underline{...}` → `<u>...</u>`
**LaTeX environments styling:**
- `\begin{proof}...\end{proof}` → styled proof block with QED symbol
- `\begin{theorem}`, `\begin{lemma}`, etc. → styled theorem blocks
**Display math enhancements:**
- Wrapped in styled container with subtle gold border
- "LaTeX" label and copy button appear on hover
- Dark theme KaTeX color overrides for better readability
- Custom scrollbar for overflow
## Why It Works
The key insight is that markdown processing was escaping backslashes in
LaTeX before KaTeX could see them. By extracting all math expressions
into alphanumeric placeholders *before* markdown runs, then restoring
them *after*, the LaTeX content passes through to KaTeX unmodified.
Using purely alphanumeric placeholders like `MATHPLACEHOLDERINLINE0END`
instead of `<<MATH_INLINE_0>>` prevents markdown from interpreting them
as HTML tags and stripping them.
## Test Plan
### Manual Testing
- Hardware: Any machine with the dashboard
- What you did:
- Ask model to "write a proof in latex"
- Verify inline math like `$x \in S$` renders correctly
- Verify display math like `\begin{align*}...\end{align*}` renders as
block
- Verify `\documentclass`, `\begin{document}` are stripped (not shown)
- Verify `\emph{...}` converts to italics
- Verify copy button works on display math blocks
- Test edge cases: `$5` (currency) stays as text, `\$50` (escaped)
becomes `$50`
Before:
<img width="799" height="637" alt="Screenshot 2026-01-19 at 11 51 22 AM"
src="https://github.com/user-attachments/assets/62a705b8-b3c2-47b8-afd0-5d0c1b240e44"
/>
After:
<img width="809" height="642" alt="Screenshot 2026-01-19 at 11 46 58 AM"
src="https://github.com/user-attachments/assets/4f35fa1d-333c-4285-bc68-58a50f8f148e"
/>
### Automated Testing
- Dashboard builds successfully with `npm run build`
- Existing functionality preserved
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Motivation
With a single pipeline layer, PipelineFirstLayer gets composed with
PipelineLastLayer.
## Changes
<!-- Describe what you changed in detail -->
## Why It Works
<!-- Explain why your approach solves the problem -->
## Test Plan
### Manual Testing
### Automated Testing
Made failing tests. Fixed them!
## Motivation
Layer types does not contain either "sliding_attention" or
"full_attention" for pipeline parallel (single layer).
## Changes
<!-- Describe what you changed in detail -->
## Why It Works
<!-- Explain why your approach solves the problem -->
## Test Plan
### Manual Testing
Manually tested single layer of GPT OSS. Doesn't crash
### Automated Testing
<!-- Describe changes to automated tests, or how existing tests cover
this change -->
<!-- - -->
## Motivation
Uneven placements were causing issues for some users with lopsided
setups. While fixing, I ran into another issue with impossible
allocation of memory.
## Changes
- Allocate at least 1 layer per device.
- Catch overallocation of memory with an error.
## Why It Works
<!-- Explain why your approach solves the problem -->
## Test Plan
### Manual Testing
Tested that GPT OSS is placed correctly.
### Automated Testing
Added breaking tests in the first commit. Resolved with new placement
algorithm in the second one.
## Motivation
The README showcases exo's features and benchmarks but doesn't show what
the dashboard actually looks like. Adding a screenshot helps users
understand what they'll get when they run exo.
## Changes
- Added dashboard screenshot to `docs/imgs/dashboard-cluster-view.png`:
Shows the cluster topology view with 4 × 512GB M3 Ultra Mac Studio
running DeepSeek v3.1 (8-bit) and Kimi-K2-Thinking (4-bit)
- Added a new "Dashboard" section to README.md below Features,
displaying the screenshot with caption
## Why It Works
Visual documentation helps users understand what exo offers before they
install it. The screenshot demonstrates the cluster management
capabilities.
## Test Plan
### Manual Testing
- Verified image renders correctly in GitHub markdown preview
### Automated Testing
- N/A - documentation only change
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Motivation
Runners that crash can swallow errors - we should re-raise. Also the
exception handler annoyed me.
## Changes
The try: except in the runner's chat now re-raises.
## Motivation
mp sender occasionally does not have time to flush its events before
collect() is called, making the event ordering test fail.
## Changes
- Replace mp_channel with simple collector for event ordering test
- Also suppress warning for <frozen importlib._bootstrap>:488 <frozen
importlib._bootstrap>:488: DeprecationWarning: builtin type SwigPyObject
has no __module__ attribute
## Why It Works
<!-- Explain why your approach solves the problem -->
## Test Plan
### Manual Testing
<!-- Hardware: (e.g., MacBook Pro M1 Max 32GB, Mac Mini M2 16GB,
connected via Thunderbolt 4) -->
<!-- What you did: -->
<!-- - -->
### Automated Testing
Ran the test 100 times without it failing.
Support HTTPS_PROXY/HTTP_PROXY environment variables for proxy
configuration and SSL_CERT_FILE for custom CA certificates, enabling use
in corporate environments with SSL inspection.
## Motivation
Users in corporate environments often need to route traffic through HTTP
proxies and use custom CA certificates for SSL inspection. Without this
support, exo cannot download models in these network configurations.
## Changes
- Added `HTTPS_PROXY`/`HTTP_PROXY` environment variable support to
`create_http_session()` in `download_utils.py`
- Added `SSL_CERT_FILE` environment variable support for custom CA
certificate bundles, falling back to certifi's default bundle
## Why It Works
- `aiohttp.ClientSession` natively supports the `proxy` parameter for
routing requests through HTTP proxies
- `ssl.create_default_context(cafile=...)` accepts a custom CA bundle
path, allowing corporate CAs to be trusted
- Using environment variables is consistent with the codebase's existing
configuration patterns (e.g., `EXO_HOME`, `HF_ENDPOINT`)
## Test Plan
### Manual Testing
- Set `HTTPS_PROXY` environment variable and verified model downloads
route through proxy
- Set `SSL_CERT_FILE` to custom CA bundle and verified SSL verification
succeeds with corporate SSL inspection
### Automated Testing
- No automated tests added; this change is configuration-only and does
not alter existing behavior when environment variables are unset
## Motivation
CI failures can be avoided by running checks locally before committing.
This adds clear documentation to AGENTS.md so that AI agents (and
humans) know exactly which checks must pass before pushing code.
## Changes
Added a new "Pre-Commit Checks (REQUIRED)" section to AGENTS.md that:
- Lists all 4 required checks (basedpyright, ruff, nix fmt, pytest)
- Provides a one-liner to run all checks in sequence
- Notes that `nix fmt` changes must be staged before committing
- Explains that CI runs `nix flake check` which verifies everything
## Why It Works
Clear documentation prevents CI failures by ensuring contributors run
checks locally first. The one-liner command makes it easy to run all
checks before committing.
## Test Plan
### Manual Testing
- Verified the documented commands work correctly
### Automated Testing
- N/A - documentation only change
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
- Error chunks
- Use error handling in exo_bench.py
## Motivation
Return when an error occurs so that generation stops. Adding timeouts is
a separate TODO for model loading and chat completions.
## Changes
- Return HTTP exceptions as JSON responses in an OpenAI compatible
format.
- Context manager for generation to catch and return error messages.
- Use error handling in exo_bench.py.
## Test Plan
### Manual Testing
Manually tested that exo_bench returns on failures within and outside
generation
### Automated Testing
<!-- Describe changes to automated tests, or how existing tests cover
this change -->
<!-- - -->
## Motivation
Previous fix still failed in CI. Suspecting permissions issue with
GITHUB_TOKEN not being able to see draft releases via API.
## Changes
1. Add explicit `permissions: contents: write` to the job
2. Use `gh release list` first to check if draft exists (this uses a
different code path that might work better)
3. Add debug echo statements
## Test Plan
Delete v1.0.63 tag and re-push after merging.
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Motivation
Fixes the draft release detection that failed on the v1.0.63 release
attempt.
## Changes
The jq query was piped to `head -1` which truncated multi-line JSON
output to just `{`, causing the empty check to fail.
Changed to use `first // empty` in jq instead.
## Test Plan
Tested locally:
```bash
GITHUB_REF_NAME="v1.0.63"
gh api repos/exo-explore/exo/releases --jq "[.[] | select(.draft == true) | select(.name == \"$GITHUB_REF_NAME\")] | first // empty"
# Returns the full draft release JSON (2711 chars)
```
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Motivation
Closes#1140
Currently releases are uploaded to S3 for Sparkle updates but there's no
GitHub Release created, and Sparkle update dialogs don't show release
notes. Users have no visibility into what changed.
## Changes
- Added release workflow documentation comment at top of `build-app.yml`
- Added "Fetch release notes for Sparkle" step that converts markdown
from draft GitHub release to HTML
- Added "Inject release notes into appcast" step that embeds HTML in
appcast.xml with CDATA
- Added "Publish GitHub Release" step that attaches DMG and publishes
the draft
## Why It Works
- Sparkle's `<description>` tag supports HTML wrapped in CDATA for
rendering in update dialogs
- GitHub's markdown API (`/markdown`) converts the release notes to HTML
with proper formatting
- Draft releases allow writing polished notes before the build, then the
workflow publishes them automatically
- The workflow fails if no draft release exists, ensuring release notes
are always provided
## Test Plan
### Manual Testing
1. Create a draft GitHub release for a new tag with markdown release
notes
2. Push the tag to trigger the workflow
3. Verify the GitHub release is published with DMG attached
4. Download appcast.xml from S3 and verify
`<description><![CDATA[...]]></description>` contains HTML
5. Test Sparkle update dialog on macOS to confirm release notes appear
### Automated Testing
No automated tests added - this is CI workflow configuration.
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
still seeing churn in our networking - lets properly rate limit it
## changes
added an httpx client with max connections with a persistent AsyncClient
## testing
deployed on cluster, discovery VASTLY more stable (the only deleted
edges were those discovered by mdns)
## Motivation
Local network warning banner was showing on fresh install even though
mDNS was working. The check would fail before the user had a chance to
grant permission via the macOS prompt.
## Changes
- Added `hasWorkedBefore` flag persisted in UserDefaults
- Only show warning if permission previously worked but now doesn't
## Why It Works
On fresh install, the check may fail (no permission yet), but
`hasWorkedBefore` is false so no warning shows. Once the user grants
permission and a check succeeds, we record it. Future failures (zombie
permission after restart) will show the warning since `hasWorkedBefore`
is now true.
## Test Plan
### Manual Testing
Run locally
### Automated Testing
N/A
## Motivation
Prompt Sizer was broken as transformers 5.x tokenizers create
BatchEncodings which are essentially a dictionary of {input_ids: []}
instead of the list of input ids.
## Test Plan
### Manual Testing
Tested that exo bench runs as expected.
### Automated Testing
<!-- Describe changes to automated tests, or how existing tests cover
this change -->
<!-- - -->
rust logs were too verbose - now only warnings propagate to python
entirely happy not to merge this and to clean up rust logging instead,
but this felt saner right now
## Motivation
https://github.com/exo-explore/exo/issues/1070
## Changes
Added check in ChatForm.svelte to reset selectedChatModel when it no
longer matches any running instance.
## Why It Works
The $effect now detects when the selected model is stale (not in
availableModels()) and resets to the first available model.
## Test Plan
### Manual Testing
1. Create instance of Model A → Delete it → Create instance of Model B →
Chat
2. Verify request goes to Model B (not Model A)
---------
Co-authored-by: Alex Cheema <41707476+AlexCheema@users.noreply.github.com>
## Motivation
Simplification of API + moving model specific code to the runner
<!-- Why is this change needed? What problem does it solve? -->
<!-- If it fixes an open issue, please link to the issue here -->
## Test Plan
### Manual Testing
Tested that GPT OSS outputs are parsed correctly on the dashboard.
### Automated Testing
<!-- Describe changes to automated tests, or how existing tests cover
this change -->
<!-- - -->
## Motivation
Adds several unmerged fixes for GPT OSS.
Also adds GPT OSS 20B MXFP4 Q8 instead of Q4 for numerical stability (as
this is unstable for MLX LM too)
<!-- Why is this change needed? What problem does it solve? -->
<!-- If it fixes an open issue, please link to the issue here -->
## Test Plan
### Manual Testing
Manually tested. No further gibberish responses.
### Automated Testing
Ran EXO Bench - pipeline, tensor and single node work on both 20B and
120B models
we're seeing a lot of network churn - perhaps this is a connection
timing out issue? lets also re-try after a second
## testing
none yet
---------
Co-authored-by: Alex Cheema <alexcheema123@gmail.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Clean up the commented out code and make sure the comments are unified.
Carrying around the commented out code means people making changes to
model_cards are supposed to update it, but that's not clear and won't be
picked up by type checking etc. Drop it for now - it's in the git
history.
Also make the rest of the comments a bit more uniform, and place
comments about a specific model card inside the model card (instead of
above) so they don't get lost when code is added/moved around.
Test plan:
- my eyes
Continue working towards a fully Nix based build by building the
dashboard with Nix. Continuing the theme of using the existing lock
files, use dream2nix to parse the lock file and build the tree of
dependency derivations.
dream2nix doesn't like the bundleDependencies, so we apply a small patch
to the lock file that drops all dependencies that are bundled. This
should ideally be contributed upstream but that can be done later.
Use this new dashboard build in the build-app CI workflow, meaning
future macOS apps will include this reproducible dashboard.
Test plan:
- Built a DMG, shipped to a cluster, loaded in a browser with no cache
and the dashboard looks good.
- Directory layout is as expected:
```
$ nix build .#dashboard
$ find result/
...
result/_app/immutable/entry
result/_app/immutable/entry/app.CTPAnMjf.js
result/_app/immutable/entry/start.fUSEa-2O.js
result/_app/immutable/nodes
result/_app/immutable/nodes/3.DqQr1Obm.js
result/_app/immutable/nodes/0.DgEY44RO.js
result/_app/immutable/nodes/2.BjZg_lJh.js
result/_app/immutable/nodes/1.D6vGUYYT.js
result/_app/env.js
result/_app/version.json
result/exo-logo.png
result/favicon.ico
result/index.html
```
The Rust workspace lacked Nix build support, making it difficult to
build packages reproducibly or run checks in CI.
Added a flake-parts module at rust/parts.nix that uses crane for Rust
builds and fenix for the nightly toolchain. The source filter isolates
rust/ and root Cargo files to prevent Python/docs changes from
triggering Rust rebuilds. Exports packages (system_custodian,
exo_pyo3_bindings wheel, exo-rust-workspace) and checks (cargo-nextest,
cargo-doc) for all three target platforms.
The devShell now uses inputsFrom to inherit build dependencies from the
workspace package, removing the need for manual pkg-config/openssl setup.
Test plan:
- Ran `nix flake check` successfully
- Built `nix build ".#checks.x86_64-linux.cargo-nextest"` and tests pass
- Built `nix build ".#exo_pyo3_bindings"` and wheel is produced
Update nix flake inputs. Add a second input as Swift is currently broken
in nixpkgs on Linux for `swift-format` as we want `nix fmt` to continue
being reproducible everywhere.
## Motivation
GPT OSS did not previously support tensor sharding
## Changes
Add GPT sharding support in tensor_auto_parallel.
Code is mostly @rltakashige's
## Test Plan
### Manual Testing
Tested GPT-OSS - MLX Fast Sync causes issues in Tensor RDMA - this is a general problem at the moment.
Preparing to add a flake-parts module for Rust builds. The flake-utils
library doesn't support the module system needed for cleanly separating
the Rust build configuration.
Converted from flake-utils to flake-parts, switching to the treefmt-nix
flakeModule import pattern. The devShell and formatter outputs remain
functionally equivalent.
Test plan:
- Ran `nix flake check` successfully
- Verified `nix develop` provides the same environment
## Motivation
Add documentation to help AI coding agents (Claude Code, Cursor, GitHub
Copilot, etc.) understand the exo codebase and contribute effectively.
## Changes
- Add `AGENTS.md` with guidance for AI agents working on the codebase
- Add symlink `CLAUDE.md -> AGENTS.md` for backwards compatibility with
Claude Code
## Why It Works
`AGENTS.md` is becoming a standard convention for AI agent instructions.
The symlink ensures Claude Code (which looks for `CLAUDE.md`) continues
to work while supporting the broader `AGENTS.md` convention.
## Test Plan
### Manual Testing
- Verified symlink works correctly
### Automated Testing
- N/A (documentation only)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
## Motivation
Upgrade mlx-lm to version 0.30.2 which requires transformers 5.0.0rc2 as
a prerelease dependency. This enables support for newer models like Kimi
K2 Thinking while maintaining compatibility with existing models.
The transformers 5.x release includes breaking changes that affect
custom tokenizers like Kimi's TikTokenTokenizer, requiring compatibility
fixes.
## Changes
### Core Changes
- **mlx-lm upgrade**: Bump to 0.30.2 with locked exact versions for
mlx/mlx-lm to prevent breaking changes
- **transformers 5.x compatibility**: Enable prerelease transformers
dependency
### Kimi K2 Tokenizer Fixes
- Add `bytes_to_unicode` monkey-patch to restore function moved in
transformers 5.0.0rc2
- Load `TikTokenTokenizer` directly instead of via `AutoTokenizer` to
bypass transformers 5.x bug with `auto_map` fallback
- Patch `encode()` to use tiktoken directly with `allowed_special="all"`
to handle special tokens from chat templates
### Other Changes
- Dashboard: Show disk usage for completed model downloads
- CI: Add `workflow_dispatch` trigger to build-app workflow
- Docs: Add basic API documentation
### Testing
- Add comprehensive tokenizer unit tests for all supported models
- Tests verify encode/decode, special token handling, and chat template
encoding
## Why It Works
**bytes_to_unicode issue**: transformers 5.0.0rc2 moved
`bytes_to_unicode` from `transformers.models.gpt2.tokenization_gpt2` to
`transformers.convert_slow_tokenizer`. Kimi's `tokenization_kimi.py`
imports from the old location. The monkey-patch restores it at module
load time.
**AutoTokenizer issue**: transformers 5.x has a bug where
`tokenizer_class_from_name('TikTokenTokenizer')` returns `None` for
custom tokenizers with `auto_map`. Loading the tokenizer directly
bypasses this.
**encode() issue**: transformers 5.x's `pad()` method fails for slow
tokenizers. Using tiktoken's encode directly with
`allowed_special="all"` avoids this path and properly handles special
tokens like `<|im_user|>` from chat templates.
## Test Plan
### Manual Testing
- Hardware: 2x Mac Studios connected via Thunderbolt 5 (mike22 and
james21)
- Tested Kimi K2 Thinking, GPT-OSS-120B, GPT-OSS-20B, LLama-3.1-8B-bf16, qwen3-30B-A3B-8bit model with pipeline parallelism across both
nodes
- Verified warmup inference completes successfully
- Verified chat completions work with special tokens
### Automated Testing
- Added `test_tokenizers.py` with 31 tests covering:
- Basic encode/decode for all model families (deepseek, kimi, llama,
qwen, gpt-oss, glm)
- Special token encoding (critical for chat templates)
- Chat template application and encoding
- Kimi-specific and GLM-specific edge cases
- All tests pass: `uv run pytest
src/exo/worker/tests/unittests/test_mlx/test_tokenizers.py`
### Failing Tests
RDMA with all models.
---------
Co-authored-by: Evan <evanev7@gmail.com>
The CI was only running `nix flake check` on ubuntu-latest, missing
builds for other platforms and not caching packages or devShells.
Added a matrix-based `nix-build` job that runs on macos-26 (aarch64-darwin),
ubuntu-latest (x86_64-linux), and ubuntu-24.04-arm (aarch64-linux). Each
job enumerates all packages and devShells via `nix flake show --json`,
builds them in a single `nix build` call for parallelization, then runs
`nix flake check`. The cachix-action pushes all built outputs automatically.
This ensures all Nix outputs are built and cached for every supported
platform, speeding up local development and CI runs.
Test plan:
- Tested jq enumeration command locally, correctly outputs devShell paths
- Verified xargs pipeline works with the enumerated outputs
Enable cachix and push to it in the pipeline.yml workflow. This won't
cache a huge amount yet but will automatically extend our caching as we
build more of the repo with Nix in CI. It can also be used by local
users by accepting our cache to improve the speed of local builds.
Test plan:
- CI
The downloads dashboard showed "Completed" for finished model downloads
but provided no indication of how much disk space each model or the
total models on a node were using.
Added total_bytes field to DownloadCompleted type so the size is
preserved when a download completes. Updated the dashboard to display
the model size next to "Completed" status (e.g., "Completed (251.1GB)")
and a total disk usage line below the model count for each node (e.g.,
"502.2GB on disk").
Test plan:
- Ran unit tests for download apply and planning logic
- Type checked all modified files with basedpyright
Build app is the most convenient way to get a DMG for testing, but
currently it's a bit limited. You have to push to test-app every time
which is far from ideal and requires a bit too much force pushing for my
liking.
Add the workflow_dispatch trigger. This adds a button in the actions UI
to trigger a workflow for a named branch, which means you can use your
normal dev branch instead of having to push to test-app. We'll leave
that behaviour there for now too, though it may change in future.
Filter on `"${{ github.event_name }}" == "workflow_dispatch"` and set
those to alpha as well. Will verify by pushing the first version from
`main` just in case. Unfortunately we do have to merge this before we
can test it.
Test plan:
- Looking really hard.
treefmt is a useful to be able to access directly for some formatters like
`jj fix`. Expose it in the devshell.
Test plan:
- Used with `jj fix` on a large branch. It worked.
## Motivation
https://github.com/exo-explore/exo/issues/1075
## Changes
- Added in-app "Uninstall" option under Advanced menu that cleanly
removes all system components
- Added NetworkSetupHelper.uninstall() to remove LaunchDaemon, scripts,
logs, and restore network settings
- Added LaunchAtLoginHelper.disable() to unregister from login items
- Created standalone uninstall-exo.sh script for users who already
deleted the app
- Added uninstall documentation to README
<img width="386" height="577" alt="image"
src="https://github.com/user-attachments/assets/6bbcd18a-992a-409d-8791-ed5e13bbcfe0"
/>
<img width="372" height="432" alt="image"
src="https://github.com/user-attachments/assets/ee76b45d-c111-4807-ab28-3f2f20e01140"
/>
## Why It Works
The in-app uninstaller runs a privileged shell script (via AppleScript)
to launchctl bootout the daemon, remove files, and restore the
"Automatic" network location. The standalone script provides the same
cleanup for users who already deleted the app.
## Test Plan
### Manual Testing
Hardware: MacBook Pro
- Built and ran app, verified LaunchDaemon and network location were
created
- Used in-app Uninstall, verified all components removed and network
restored to Automatic
- Rebuilt app, quit normally, ran sudo ./uninstall-exo.sh, verified same
cleanup
### Automated Testing
N/A
---------
Co-authored-by: Evan <evanev7@gmail.com>
We did not properly forward tools to the chat template before. This is not a full tool calling impl - but it should improve things slightly.
## Changes made
Pass tools to the hf tokenizers chat template
Join message chunks into a larger message (opencode does this sometimes - we were ignoring before)
## Future work
We need to parse the model output and normalise the return format to be compatible with the openai api.
we have a lot of dependencies we have no intent of using. kill them with
fire!
## testing
exo still launches and does the worst inference known to man on my Qwen3
instance. tests pass too!!
## Motivation
The "UNKNOWN" status shown when first launching an instance is confusing
and unhelpful. "PREPARING" better describes what's actually happening.
## Changes
- Renamed status from "UNKNOWN" to "PREPARING" in dashboard
(+page.svelte)
- Renamed unknown state to preparing in macOS app
(InstanceViewModel.swift, InstanceRowView.swift)
## Why It Works
The status appears when an instance exists but runners haven't reported
status yet. "PREPARING" accurately describes this transitional state.
## Test Plan
### Manual Testing
Hardware: MacBook Pro
<img width="319" height="200" alt="image"
src="https://github.com/user-attachments/assets/9a1c3caf-026d-47ea-80d1-63c6e41d93aa"
/>
### Automated Testing
N/A
## Motivation
<!-- Why is this change needed? What problem does it solve? -->
<!-- If it fixes an open issue, please link to the issue here -->
## Changes
<!-- Describe what you changed in detail -->
## Why It Works
<!-- Explain why your approach solves the problem -->
## Test Plan
### Manual Testing
<!-- Hardware: (e.g., MacBook Pro M1 Max 32GB, Mac Mini M2 16GB,
connected via Thunderbolt 4) -->
<!-- What you did: -->
<!-- - -->
### Automated Testing
<!-- Describe changes to automated tests, or how existing tests cover
this change -->
<!-- - -->
---------
Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: Ryuichi Leo Takashige <leo@exolabs.net>
## Motivation
Previously we hardcoded AWS credentials into the app.
This is not good practice.
## Changes
Use presigned URLs instead.
## Why It Works
Presigned URLs are an S3 feature for this kind of thing. They provide an
expiring presigned URL with certain permissions. In this case we have a
presigned URL with `s3:PutObject` permission that expires after 5
minutes. The client uses this presigned URL to upload a bug report
instead of using its own credentials to sign a request. This also
simplifies a lot of the Swift code.
## Test Plan
### Manual Testing
On a single MacBook, I downloaded the app and sent a bug report. It
worked and appeared in the bucket.
## Motivation
Often users are running into issues with RDMA. See
https://github.com/exo-explore/exo/issues?q=is%3Aissue%20rdma
Having some debug info in the macOS app will help to debug these issues.
## Changes
Displays output of the following commands in the debug info section of
the macOS app:
1. `rdma_ctl status`
2. `ibv_devices`
3. `ibv_devinfo`
## Why It Works
It displays RDMA debug info in the debug info section of the macOS app.
## Test Plan
### Manual Testing
We need to make a new build of the macOS app and check the output under
the following conditions:
1. No RDMA enabled.
2. RDMA enabled but no devices connected over TB5.
3. RDMA enabled and devices connected over TB5.
Add typescript auto formatting with Prettier and treefmt-nix. Added a
.prettierrc to useTabs, which isn't the default, to reduce churn. The
rest looks okay and will be checked by CI.
Test plan:
- CI
Swift code currently has no auto formatting. Add `swift-format` to the
`treefmt-nix` config to get this formatted.
As our existing Swift code uses 4-space formatting instead of the
default 2-space, also adds a custom `.swift-format
Test plan:
- CI
## Motivation
Testing multiple devices simultaneously requires coordination, and we
don't necessarily want to run a full EXO to test single components. We
need a mid-scale integration testing framework for distributed tests.
## Changes
Add a simple python server + bash query that runs Jaccl and Ring tests
without constructing a worker/master/networking. The query relies on all
devices being accessible over tailscale, currently.
## Test Plan
Manually tested RDMA + Ring inference on 2 nodes.
## Motivation
Fixed a crash we found
## Changes
try/catch return None if we get an exception instead of crashing exo
## Test Plan
### Manual Testing
Exo launches. Couldn't repro the original case this arose.
## Motivation
After machine restart, macOS local network permission can appear enabled
in System Settings but not actually work. EXO fails to discover other
machines, and the only fix is manually toggling the permission off/on
and relaunching. Users had no way to know this was happening.
## Changes
- Added LocalNetworkChecker service that detects if local network access
is actually functional
- Added warning banner with instructions and "Open Settings" button when
blocked
- Added NSLocalNetworkUsageDescription and NSBonjourServices to
Info.plist (required by macOS)
<img width="386" height="712" alt="image"
src="https://github.com/user-attachments/assets/c6fc873d-2c6a-4c9b-89cb-f7bc7322e25b"
/>
## Why It Works
Uses NWConnection to UDP multicast address 224.0.0.251:5353 (mDNS),
which is subject to the app's actual TCC permission state. Other
approaches (NWBrowser, dns-sd subprocess) either require additional
entitlements or run with their own permissions, giving false results.
## Test Plan
### Manual Testing
Hardware: MacBook Pro
- Toggle local network OFF in System Settings → warning banner appears
- Toggle local network ON → warning disappears
- Verified detection correctly reflects actual permission state
### Automated Testing
N/A
2026-01-08 12:24:46 +00:00
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