Project alias, cwd, scope and command ceilings from actual sessions. Bind initial attachment cwd once in the shared broker/router while keeping root-relative delegation and detach generations. Preserve caller coordinates across reads, searches, checked checkout and commands; keep provider authorization and symlink boundaries.
Connect real SubWorkers, all filesystem Tools, scoped aliases, HTTP providers and limited Host grants in permanent regressions. Validated related normal suites (workdir http-client, tools, worker, worker-runtime, server-api typescript, fs-operation), workspace-server normal suite (1272 passed, 3 existing ignores), root check, product binary builds, rustdoc/doctests, generated contract checks, format and state-contract names. Test roots are checkout-local; Git parent discovery requires GIT_CEILING_DIRECTORIES at TMPDIR, confirmed against exact b860 baseline.
Keep bounded reasons and derived failure stages separate from public classification. Reject provider-authored raw error text on transport decoding. Preserve identity mismatch when cleanup fails and retain its handle for explicit close without opening again. Add signed Runtime HTTP, Registry/API logging, remote mismatch, authorization no-dispatch and deferred fault coverage. Focused tests and Workdir suite pass; full-source validation follows T773 audit contract merge.
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