weichen
e9357131af
Why: The completion proposal defines the N1/Q1/I1 phases but not their work packages; D1 has landed, so the three phases are now unblocked and need file-level plans grounded in the current pins. Evidence: docs-only change; file:line claims verified against the pinned worktrees (native 3a110a7, squad 5a57636, intent 65aaebc, backend e7fb276). Impact: Adds one proposal and one link line; no code changes. Refs: docs/proposals/2026-10-02-agent-stack-completion.md