* refactor(model-routing): centralize explicit foreground fallback policy
Make foreground fallback an explicit per-user, availability-only policy shared by streaming Chat, non-stream Chat, and Agent runs.
Preserve strict defaults, owner/model and credential boundaries, pinned Agent routes, and truthful per-round provenance/accounting. Carry provider-reported model identifiers through native streaming adapters, non-stream responses, and caches, and keep legacy default_model_fallbacks as tombstoned raw storage that generic settings APIs and agent tools cannot expose or mutate.
* fix(agent-loop): restore rebase-dropped qwen routing, workspace prompt, and temperature clamp
* fix(model-routing): thread selected endpoint identity, fix cost classification and fallback eligibility
* fix(chat): restore stream helpers and harden run stop lifecycle
* fix(model-routing): let numeric provider codes win over symbolic rate-limit statuses
* fix(agent-loop): apply qwen temperature and notes-tool clamps per fallback candidate
* fix(chat): honor queued stop across resend and reload canonical terminal on EOF
* fix(chat): track stop queue and cleanup ownership by per-send generation
* fix(agent-loop): preserve requested temperature for non-qwen fallback candidates
* fix(chat): reserve send ownership before any await and scope stop to the current send
* fix(chat): clear the previous run identity at send reservation
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Co-authored-by: RaresKeY <158580472+RaresKeY@users.noreply.github.com>
Co-authored-by: StressTestor <212606152+StressTestor@users.noreply.github.com>
atomic_write_json/atomic_write_text build their temp filename as
"{path}.tmp.{os.getpid()}". os.getpid() is constant for the life of a
process, so it only ever distinguishes concurrent writers that live in
different OS processes. Odysseus runs as a single long-lived process
per container, so two concurrent writers to the same path (e.g. two
request handlers racing a settings save) always compute the identical
temp path. Whichever finishes os.replace() first removes the shared
tmp file out from under the other, which then raises FileNotFoundError
on its own os.replace() instead of landing its write.
Fix: derive the temp suffix from uuid4() instead of the PID, so every
call gets a distinct temp path regardless of process/thread identity.
routes/prefs_routes.py's _save() had an independent, hand-rolled copy
of the exact same PID-suffix logic (not the shared core.atomic_io
helper other routes already use, e.g. routes/auth_routes.py) with the
same bug. Replaced it with a call to atomic_write_json.
Fixes#5596
Co-authored-by: Alexandre Teixeira <111787685+alteixeira20@users.noreply.github.com>
* refactor(constants): single source of truth for data dir + merge core/src constants
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* docs(contributing): use named src.constants for data paths, drop core/constants references
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
