Add 'serper' as a web search backend, following the existing provider
pattern (keenable/exa): POST to https://google.serper.dev/search with the
X-API-KEY header, map the 'organic' results into the shared result format,
and fall back to DuckDuckGo when no key is configured.
- key resolved from config.api_key or SERPER_API_KEY env var
- 429 handled with a rate-limit message; other HTTP errors surfaced
- tests cover success, env-key, no-key fallback, HTTP error and rate limit
- docs: add Serper config example and list it in tools.web.search providers
Maintainer edit: preserve raw cmd.exe quoting for shell='cmd', propagate native exit codes through the default PowerShell path, and keep quoted Windows executable paths invokable under PowerShell.
Maintainer edit: prefer pwsh when available so single-line commands support modern PowerShell operators, add -NonInteractive, and parse explicit cmd.exe paths with Windows path semantics for cross-platform tests.
fix(exec): default Windows commands to PowerShell and allow shell parameter
Single-line commands on Windows were routed through cmd.exe
(asyncio.create_subprocess_shell) while multi-line commands used
PowerShell. This caused cross-drive cd failures, missing $VAR expansion,
and inconsistent behavior depending on whether a command contained a
newline. The shell parameter was also rejected on Windows.
- Route all Windows commands through PowerShell by default so single-line
and multi-line commands share the same shell semantics.
- Allow the shell parameter on Windows: accepts powershell, pwsh, or cmd.
- cmd.exe remains reachable via shell="cmd" as an explicit escape hatch.
- Update tests to cover the new default and shell-parameter paths.
Fixes#4544
@
_get_copilot_access_token had a check-then-act race: concurrent chat()
calls after token expiry both fetched new tokens and clobbered each other.
Add asyncio.Lock with double-checked locking so only one fetch happens
per expiry window.
Closes#4677
maintainer edit: update the existing transient retry tests for reconnect-first behavior and keep structured retry-failure coverage in the focused MCP transient suite.
maintainer edit: treat transient MCP stream failures as dead sessions so the existing reconnect handler can refresh the session before retrying. Also cover retry failure as a structured tool error.
maintainer edit: cron is also a trigger source, so keep the new CLI-delivered source explicitly named as local trigger across backend, WebUI, docs, and tests.
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