Spec 5: the HttpClient registration is named as AddHttpClient<ISpeechToText, OpenAiSpeechToText>() (package Microsoft.Extensions.Http), which is how Program.cs registers it.
- Fill TimeZoneId only for a configured session/host zone with a resolvable IANA id
(IExtensionHost.TimeZoneId); otherwise children inherit the host's TZ instead of TZ=Local/UTC.
- Host hardening logs a warning instead of throwing when libc/prctl can't be resolved.
- A hook or process_spawn handler returning a null or incomplete context fails the spawn with
InvalidOperationException, so bash reports "process environment hook failed".
- Move tool-result redaction into the Agent slice with a behavioural no-change check.
- ProcessSpawnContext.ApplyTo(psi) sets cwd and replaces the environment; used by bash and ExecAsync.
- Split the Telegram process environment types into their own files; move the Extensions.Tests
NoHostHardening under Support/; check the Claude Code assembly never references the spawn policy.
- Spec and docs: TZ inheritance, incomplete contexts, ApplyTo, async spawn handlers, root skip.
