* Studio: merge developer prompts for GGUF chat
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---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* Studio: fix OpenAI- and Anthropic-compatible API spec compliance
* Studio: fix API spec-compliance gaps on passthrough and streaming paths
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Studio: carry context_length_exceeded through the OpenAI passthrough error path
* Studio: count tool-schema tokens in the Anthropic server-tool stream, and small stream-handling guards
* Studio: guard message_delta usage against None and normalize developer role before proxying
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Studio: honor max_completion_tokens on the external-provider proxy path
* Studio: forward llama-server cached_tokens into OpenAI prompt_tokens_details
* Studio: sanitize messages in count_tokens to match the /v1/messages prompt
* Studio: report max_tokens for truncated tool calls and guard null usage in metadata events
* Studio: drop the request-id middleware (headers aren't declared in either spec)
* Studio: include the required request_id field in Anthropic error bodies
* Studio: honor max_completion_tokens on the audio (TTS / audio-input) paths
* Studio: add the _effective_max_tokens helper and route all max-token sites through it
* Studio: align API compatibility edge cases
* Studio: clarify multi-choice chat support
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Studio: clarify logprobs chat support
* Studio: opt the local chat UI into the streaming usage chunk so the context bar and tok/s repopulate
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Studio: forward seed to llama-server, and fix Anthropic server-tool stop_reason, tool_result id correlation, and parallel-tool execution cap
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Studio: align OpenAI chat completion spec edge cases
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Studio: align backend API compatibility tests
* Studio: honor tool caps and internal stream usage
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Studio: coerce nullable stream usage counts
* Studio: preserve system prompts with developer messages
---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: wasimysaid <wasimysdev@gmail.com>
Unify the Studio local tool-call loop (GGUF + safetensors) behind a shared ToolLoopController: ordered preface-then-tool-card rendering, duplicate-call de-looping with a forced final answer, XML-leak containment, and a parser fix that accepts closed <function=...> calls followed by trailing prose. Includes backend tests for the controller, strict parser, and GGUF route cursor reset.
* Studio: make Helper LLM startup pre-cache opt in
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* Studio: fix recipe dataset preview
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* [pre-commit.ci] auto fixes from pre-commit.com hooks
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---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Adds the Studio Hub and download manager: browse Hugging Face models and datasets, download GGUF and safetensors with live progress and cancellation, and manage on-device inventory. The Hub does not require a GPU, so it is available on chat-only hosts.
CI: all substantive checks pass, including the three Core jobs after unsloth-zoo#736. The two red checks are non-code flakes, a transient npm-registry DNS resolution failure in the package scan and one quantized vision-model output assertion whose sibling shards passed.
Trim and tighten code comments across studio/frontend TS/JS. Comment-only: every changed file verified code-identical to main via the TypeScript printer signature comparison.
Trim and tighten code comments and docstrings across the repository. Comment-only: every changed file verified code-identical to main via AST/token comparison.
Trim and tighten code comments and docstrings across studio/ Python. Comment-only: every changed file verified code-identical to main via AST/token comparison.
install.ps1 (WoA WSL fallback):
- report failure (non-zero) + restore the rolled-aside venv when the WSL GPU
install fails (torch.cuda absent) or when WSL needs enabling+reboot, instead of
returning success — so -File/Tauri callers don't see a broken install as complete
- on WSL success, Complete-StudioVenvRollback so the previous-venv backup isn't orphaned
- refuse under --tauri with a clear "use the CLI installer" message (the desktop
launcher resolves a Windows-venv backend, which a WSL-only install can't provide)
- reset $LASTEXITCODE before each wsl.exe / python probe (a stale 0 could mark WSL
ready / torch OK if the native command fails to launch)
- torch-availability probe: --reinstall so an already-installed CPU torch in a
migrated venv isn't accepted as "satisfied" (would wrongly skip the WSL path)
- treat a null HKCU PATH as empty (fresh profile) so shim PATH update can't throw
- keep apt stderr visible inside WSL (only stdout -> /dev/null) for diagnosability
scripts/uninstall.ps1:
- scope WSL cleanup to /root (the fallback's install location); stop deleting
/home/*/.unsloth, which could erase an unrelated WSL user's own Unsloth/cache
studio/setup.sh:
- direct (non-install.ps1) WSL installs now provision CUDA llama.cpp themselves
instead of being left with no GGUF server: install.ps1 exports
UNSLOTH_WSL_LLAMA_DEFERRED=1, and the aarch64+NVIDIA provision block runs under
WSL only when that marker is absent
- mark a provisioner-built llama.cpp as Studio-owned in custom-STUDIO_HOME mode so
the next setup's _assert_studio_owned_or_absent doesn't abort
- glibc>=2.41 check: also match a future major>2 (e.g. 3.0)
studio/scripts/provision_llama_cuda.sh:
- install base tools (cmake/git/curl) in their own apt transaction before the
best-effort gcc-14/g++-14 (unavailable on Ubuntu 22.04 / Debian 12, where bundling
them aborted the whole transaction and left no build tools)
- back up an existing (e.g. CPU-only) llama.cpp before the destructive clone and
restore it on clone failure, so a failed clone doesn't leave the user with no server
- honor a pinned llama.cpp ref via UNSLOTH_LLAMA_TAG instead of always tracking main
unsloth/models/_utils.py:
- set PYTORCH_CUDA_ALLOC_CONF (expandable_segments) via a CUDA-free Spark detector
(nvidia-smi, not torch.cuda.get_device_name) so it takes effect before CUDA/the
caching allocator initialize — previously it was a silent no-op on auto-detected Spark
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Raise ruff line-length to 100 and extend the local pre-commit format pipeline (def-signature magic-comma normalization, short multi-line assert collapse, kwarg '=' spacing, blank-line-after-short-import removal, adjacent string-literal / f-string+plain merge, redundant-pass pruning). Every transform re-checks the file AST and is dropped if it would differ; the whole-repo reformat is verified AST-identical per file and idempotent.
* Studio: stop leaking internal exceptions to API clients; harden sandbox path
Security hardening for the FastAPI backend.
Error exposure (CodeQL py/stack-trace-exposure): many route handlers returned
raw caught-exception text to clients via HTTPException detail / response bodies,
which can leak internal filesystem paths and stack detail. Add shared helpers in
utils/utils.py (safe_error_detail, log_and_http_error) that log the full
exception server-side and return a generic message, and sweep the route layer
(inference, models, export, training, datasets, chat_history, providers,
mcp_servers, settings, data_recipe/{jobs,seed,validate,mcp}) to use them.
Intentionally user-facing validation messages, the existing _friendly_error SSE
paths, and upstream-service body passthrough (llama-server / OpenAI) are kept;
absolute server paths echoed in models.py browse/read errors are redacted.
Path injection (CodeQL py/path-injection): serve_sandbox_file already does
basename + realpath containment; add a strict filename allowlist
(^[A-Za-z0-9._-]{1,255}$) before the path is built as defense-in-depth and to
give the analyzer a clear sanitizer.
No behavior change beyond error-message text; status codes preserved.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* Address review: keep curated error messages, fix remaining load leak
- inference.py /load non-native path: redact str(e) instead of leaking it
(matched the native branch which already redacted).
- llama_extra_args validation: return the curated, path-redacted message
instead of the generic fallback so users see the offending flag.
- sandbox file serving: allowlist now forbids only separators/control chars
via fullmatch, so generated images like 'loss curve.png' render again
while traversal is still blocked by basename + extension + realpath.
- Add safe_curated_detail() for domain/validation exceptions whose message
is intentionally user-facing; apply it to data_recipe job/validate,
chat conflict, provider test, and MCP probe paths (these were collapsing
to 'An internal error occurred', and 'connection' even mis-mapped to an
upstream-service message). Generic Exception paths keep safe_error_detail.
- log_and_http_error: tolerate stdlib loggers (no structlog kwargs).
- delete_openai_container: log transport errors with exc_info like list/create.
- Drop helper/HTTPException imports this change left unused.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* log_and_http_error: log original error traceback on stdlib-logger fallback
* Tidy error-helper and sandbox comments for PR #6072
* Trim redundant comments in studio error-hardening routes for PR #6072
* Re-trigger CI now that unsloth-zoo #727 is merged (Core pulls zoo main)
* Address PR #6072 review feedback
- inference.py: keep the actionable NativePathLeaseError detail (path-redacted)
instead of collapsing it to the generic message, matching the other curated
validation paths in this file.
- utils.py: log via a single formatted log.error(exc_info=error) call that works
for structlog and stdlib loggers; drop the now-unneeded try/except helper.
- models.py: use Path.name instead of os.path.basename(str(current)).
---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* Restore KTO logps truncation guard for TRL (re-apply dropped #5996)
#5996 ported the KTO truncation guard to TRL's _compute_logps refactor but was
dropped from main in the 2026-06-05 history rewrite. Re-apply the
unsloth/models/rl_replacements.py guard (kto_trainer_get_batch_logps +
kto_trainer_align_completion_logps); its regexes still match TRL main's current
compute_ref_log_probs / _compute_kl_logps shape
(per_token_logps = selective_log_softmax(shift_logits, ...)), so the guard
remains effective.
Also extend the version_compat detection to recognize that current shape: TRL
refactored KTO again (no get_batch_logps / _compute_logps), so the test was
failing on TRL main even though the rewrite still applies.
* KTO patcher: match single or double quotes in dict-key regexes
Per review: _KTO_COMPLETION_RE / _KTO_KL_RE hardcoded double quotes for the
TRL dict keys, so a formatter or TRL version using single quotes would make the
patch silently skip. Accept both quote styles. Verified the regexes still match
TRL main's current experimental/kto source.
transformers-latest ships a new deepseek_ocr2 model whose source-rewriter
compile exceeds the 60s per-model budget on the CI runner, same as the
existing beit/sam/sam_hq entries. Add it to KNOWN_BROKEN_COMPILE Category F
so HF=latest Core stops failing on a new upstream model. The slow compile
path itself remains a follow-up for unsloth_zoo.
* Studio: keep chat in place when composer attachments resize it
Attaching or removing a file in the chat composer could yank the whole
conversation to the bottom, and the grown composer covered the end of
the chat with no way to scroll it back into view.
Root cause: the Viewport composes refs with an identity that changes on
re-render, so React re-runs our scroll ref on unrelated renders and the
autoscroll hook treated every rebind as a fresh mount, pinning to the
bottom. On top of that the viewport reserved a fixed 160px under the
last message regardless of composer size.
- Treat same-element ref rebinds as no-ops in the autoscroll hook; only
a genuinely new viewport element pins and resets detach state
- Size the bottom spacer from the measured composer height plus a 24px
gap so the chat can always be scrolled above the composer
- On composer growth, detach from the bottom instead of auto-scrolling;
the user scrolls down to reveal the covered lines
- On composer shrink, defer the spacer shrink until it cannot clamp
scrollTop, then release it invisibly on scroll or on bottom-pinning
moments (run start, thread switch, thread load)
* Studio: release deferred composer spacer when a run owns the bottom
Sending with attachments cleared the chips after thread.runStart had
already fired, so the spacer shrink was deferred while the user sat
pinned at the bottom, leaving a permanent extra gap above the composer.
Apply shrinks immediately while a run is active or within 1s of run
start; the run-start pin owns the bottom then, so the clamp is the
intended glide. Caught by a cross-engine Playwright pass (Chromium,
Firefox, WebKit) over the pre and post builds.
* Studio: track the viewport element in state so listeners survive remounts
The deferred-shrink scroll listener was attached once against a ref, but
the keyed overlay provider remounts the viewport subtree on thread
switches, leaving the listener bound to the unmounted element. Removing
an attachment near the bottom in the new thread then left the oversized
spacer stuck until a run started. Track the viewport element in state so
the listener and the clamp math follow the new element.
Reproduced and verified with a thread-switch scenario on Chromium,
Firefox and WebKit; full matrix re-run green.
* Studio: release deferred composer spacer shrink when at the bottom (#6070)
---------
Co-authored-by: shimmyshimmer <michael@unsloth.ai>
Co-authored-by: Daniel Han <danielhanchen@gmail.com>
* Studio: emit usage and timings for MLX generation speed stats
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* Studio: make MLX generation stats request scoped
---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Follow-up to #6027. The four TestAmdGpuMonitoring tests also set
sys.modules["loggers"] = MagicMock() without cleanup, leaking a mock
loggers module into later tests. Switch them to monkeypatch.setitem so
the stub is undone at teardown, matching the worker test fix in #6027.
test_direct_wheel_url_returns_none_without_cuda_major set sys.modules
"utils"/"utils.hardware" (and structlog/loggers) to MagicMocks without
cleanup. Once run.py started importing utils.cpu_threads (#5760), the
leaked non-package utils made later tests in the same job fail with
'No module named utils.cpu_threads; utils is not a package', e.g. all of
test_selection_logic.py's TestStudioLocalhostIpv6Warning. Use
monkeypatch.setitem so the stubs are undone after the test.
* fix: persist chat presets with fast mode
* Add schema drift guard test for chat inference settings (#5862)
Asserts ChatInferenceSettings declares every InferenceParams field the
frontend persists (all but checkpoint). With extra="forbid", a field
present in the UI but missing here 400s PUT /api/chat/settings, which is
exactly how fastMode regressed. Catches the next occurrence at CI time.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
---------
Co-authored-by: Daniel Han <danielhanchen@gmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* Studio: fix load_freeze audio-type tests for #6000 Gemma 4 <|audio|> probe
#6000 extended LlamaCppBackend._detect_audio_type_strict audio_vlm arm to
also probe Gemma 4 `<|audio|>` (alongside Gemma 3n `<audio_soft_token>`),
but did not update the load_freeze simulation suite (last touched by #5922).
Its "no-match" and "bicodec" fixtures only defeat `<audio_soft_token>`; the
unmapped `<|audio|>` probe falls through to FakeLlamaServer 1-token default,
so detect_audio_type now returns audio_vlm where these tests expect
None / bicodec:
- test_functional_equivalence_no_match
- test_functional_equivalence_bicodec_match
- test_response_shape_matches_pre_fix_for_no_match
main push-CI does not run "Repo tests (CPU)" (pull_request-only), so this
surfaces in every open PR merge-ref (e.g. #5940, which is unrelated to audio).
Fix: map `<|audio|>` to a 2-token response in the three fixtures that intend
a non-audio_vlm result (restoring their original semantics), and add a
positive test_functional_equivalence_audio_vlm_match locking in #6000 new
`<|audio|>` detection.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
---------
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Normalize misplaced system-role messages in /v1/messages by hoisting their content into the top-level Anthropic system field, fixing the 422 that newer Claude Code clients trigger. Null and non-text system content is ignored rather than stringified.
Fixes#6001
* fix: enable GGUF tools with vision inputs
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* fix: GGUF vision tool routing
* Dedupe system messages on GGUF vision tool path for PR #6009
---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Daniel Han <danielhanchen@gmail.com>
Root cause (diagnosed live on an N1X WoA box, confirmed by on-screen checks):
the Windows shell's sandboxed icon-extraction broker cannot read a standalone
.ico stored under %LOCALAPPDATA% (it gets a redirected/virtualized view), so
the Desktop + Start Menu shortcuts render BLANK -- regardless of icon format
(BMP vs PNG frames), ACLs, icon cache, or shortcut-creation method, all of
which were ruled out. The IDENTICAL .ico renders correctly from a path under
the user profile. Fix: write unsloth.ico to %USERPROFILE%\.unsloth instead of
%LOCALAPPDATA%\Unsloth (shim/launcher stay in %LOCALAPPDATA%). uninstall.ps1
removes the icon at the new location. Also drops the speculative SHGetFileInfo
"image-list prime" block added while chasing the wrong (format/cache) theory.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* fix: warn when localhost resolves to ::1 but Studio is bound only to 127.0.0.1
* studio: fix localhost/::1 warning suppression and cover _run wiring
Addresses the Codex review on #5994 plus review-team findings:
- Remove the `_local_port_open("::1", port)` early-return. Studio binds
127.0.0.1 only, so a successful connect to ::1:<port> means a *different*
process is there -- exactly when http://localhost opens the wrong service
and the user most needs the warning. Dropping the probe also removes the
~0.25s startup latency and the probe/warn race.
- Extract the banner/warning block from `_run` into `_emit_startup_output`
so the wiring is unit-testable, and make the mismatch vs wildcard paths
an explicit if/elif (they are mutually exclusive by construction).
- Hoist the `_working_local_url` confirmation out of the try block and
reorder `_stdout_color_ok` before its only caller.
- Tests: add `_emit_startup_output` integration coverage (banner
include_stop_hint, warning emission, single stop hint), a regression test
that ::1 being occupied does NOT suppress the warning, dual-stack and
non-positive-port cases; drop the unreachable `None` getaddrinfo arm.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
---------
Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Co-authored-by: Etherll <mrmrmidessam@gmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* Studio: refine tool call and reasoning trigger UI
Tool call triggers:
- Chevron fades in on hover or keyboard focus and sits next to the
label instead of being pinned to the right edge, matching the other
collapsible triggers.
- Labels wrap instead of truncating so long tool names and search
queries stay fully readable.
- Smaller chevron for a lighter look.
Reasoning trigger:
- Smaller chevron to match.
- Thinking box drops its bottom padding and raises the streaming max
height so more of the thinking text is visible.
* Studio: pointer cursors and sidebar 3-dots polish
Collapsible triggers:
- Pointer cursor on the reasoning, tool call, and tool group triggers
so they read as clickable.
Chat sidebar:
- Swap the chat row 3-dots menu to the vertical more-vertical icon.
- Pointer cursor on the chat row and its menu button.
- Chat row right padding opens up on hover (pr-4 at rest, pr-8 on
hover) so the title keeps a comfortable gap and clears the menu.
* studio: refine tool-call spinner, chevron, and reasoning spacing
- Use the lucide arc spinner for running tool calls and the app-wide
Spinner, so loading states match the rest of the UI.
- Collapse long tool-call labels to a single line with an ellipsis,
reveal the full label when the row is expanded, and fix the clipped
descenders.
- Keep the collapse chevron next to the label and add top spacing above
the reasoning trigger.
- Remove the redundant nested spinner in the web search running state.
* Studio: drop tool call group background fill
The ghost tool call group used a translucent bg-muted/10 fill that read
as a faint lighter box around every group in dark mode. Remove the fill
and rounding so the group sits flush on the chat background.
---------
Co-authored-by: Daniel Han <danielhanchen@gmail.com>
The composer dock backdrop was a solid block with a hard top edge, so
chat text scrolling underneath got visibly clipped. Replace it with a
gradient that fades the top 28px to transparent.
Also shorten the plus to x rotation in the composer from 300ms to 250ms,
including the reduced motion override.
Diagnosis this cycle: the .ico is well-formed (6 BMP frames 16-256px) and the
shell resolves the logo at every size (verified via SHGetFileInfo +
SHGetImageList/ImageList_GetIcon on the system image list, all sizes incl. the
256px jumbo slot the desktop draws). The residual blank is a first-paint race:
Explorer lazily extracts a .lnk's icon and a miss (icon not yet flushed, cache
just cleared) gets cached blank. Force the extraction at install time via
SHGetFileInfo(SHGFI_SYSICONINDEX) per .lnk, populating the per-session image
list both Desktop and Start Menu draw from. WoA path only, try/catch-wrapped.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
A same-name "Unsloth Studio.lnk" recreated across reinstalls keeps Explorer's
stale (blank) iconcache_*.db entry; -show rebuilds but does not purge, so add
-ClearIconCache first (matches PR #5940). The per-.lnk SHChangeNotify remains
the primary fix. WoA-path only -- no effect on other installs.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
A non-numeric or 0 override silently fell through to `cmake -j0`, which
builds with ALL cores -- the opposite of the thermal-headroom default and a
shutdown risk on NVIDIA-ARM laptops. Validate it's a positive integer; ignore
anything else and auto-compute.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* Studio: enable audio input for Gemma 4 GGUF models
Audio file upload was disabled for Gemma 4 vision+audio GGUFs (e.g.
gemma-4-12b-it-GGUF) even though their mmproj carries an audio encoder
(clip.has_audio_encoder, gemma4ua). Two causes:
- Audio-input detection only matched Gemma 3n's <audio_soft_token>;
Gemma 4 uses <|audio|>, so audio_vlm was never detected.
- The GGUF load/status responses hardcoded has_audio_input=False, so the
flag was dropped even when audio_vlm was detected (affected Gemma 3n
GGUFs too).
Changes:
- Recognize <|audio|> alongside <audio_soft_token> in the llama-server
token probe and the tokenizer-config pattern.
- Read clip.has_audio_encoder from the mmproj as an independent,
model-agnostic signal (read_mmproj_audio_capability).
- Emit the computed has_audio_input on the GGUF load/status responses.
- Tests for the new pattern and the mmproj reader.
* Studio: default chat model and dataset helper to Qwen3.5-4B-MTP
Switch the auto-loaded chat default and the dataset-analysis helper GGUF
from gemma-4-E2B-it to unsloth/Qwen3.5-4B-MTP-GGUF (UD-Q4_K_XL).
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
---------
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Shell scripts are stored as LF in git, but without an eol rule a Windows
clone with core.autocrlf=true checks them out as CRLF. The trailing \r then
breaks them when run in WSL/Linux -- e.g. `set -e` becomes `set -e\r` and
dash/sh aborts with "set: Illegal option -". This bites developers who clone
on Windows and run the repo's *.sh directly in WSL, increasingly common with
the AMD Strix Halo ROCm-on-WSL support.
Add `*.sh text eol=lf` so every shell script always checks out with LF
regardless of the contributor's platform or core.autocrlf setting. All
tracked *.sh use Unix shebangs; none need CRLF. PowerShell/batch scripts are
left untouched -- they tolerate LF and are unaffected by this bug.
Verified with `git ls-files --eol`: every *.sh now resolves to
i/lf w/lf attr/text eol=lf.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
