Normalize OpenAI-compatible chat URL shapes so base /v1 endpoints route to /v1/chat/completions while already-full chat endpoints remain idempotent.
Preserve native local Ollama routing for bare localhost:11434 endpoints, keep localhost:11434/v1 as OpenAI-compatible, and add focused regression coverage for provider detection, chat target URLs, and model listing from /v1.
Part of #541.
Move the research route domain into the canonical routes/research/ subpackage while preserving the legacy routes.research_routes import path through a sys.modules compatibility shim.
The moved canonical module is behavior-preserving, app wiring now imports the canonical route setup function, source-introspection tests point at the new canonical path, and shim regression coverage pins legacy/canonical same-object behavior plus string-targeted monkeypatch reach-through.
Refs #4082.
Refs #4071.
Two py/polynomial-redos sinks ran regexes with two adjacent \s-matching
quantifiers over untrusted model text, backtracking O(n^2) when the tail failed
on a whitespace flood:
- routes/skills_routes.py: the last-resort verdict-from-prose extractor used
`["\'\s:]*\s*` — the class already matches \s, so the trailing \s* was a
redundant second quantifier. Dropped it (extracted to a documented module
constant _VERDICT_PROSE_RE); the matched text is identical, the scan linear.
- src/agent_loop.py _EXPLICIT_CONTINUATION_RE: `\s*[.!?]*\s*$` put two \s*
around `[.!?]*`. Rewrote as `\s*(?:[.!?]+\s*)?$` — same accepted tails (no
two \s* adjacent), linear. Portable form (no possessive quantifiers).
Both verified output-equivalent to the originals across a fuzz corpus. Adds
tests/test_redos_verdict_continuation.py pinning the unchanged match sets and
bounding the flood inputs (old patterns took seconds at 40k whitespace chars).
pewdiepie-archdaemon