diff --git a/work-items/open/20260531-005557-single-binary-insomnia-cli/artifacts/.gitkeep b/work-items/closed/20260531-005557-single-binary-insomnia-cli/artifacts/.gitkeep
similarity index 100%
rename from work-items/open/20260531-005557-single-binary-insomnia-cli/artifacts/.gitkeep
rename to work-items/closed/20260531-005557-single-binary-insomnia-cli/artifacts/.gitkeep
diff --git a/work-items/open/20260531-005557-single-binary-insomnia-cli/item.md b/work-items/closed/20260531-005557-single-binary-insomnia-cli/item.md
similarity index 98%
rename from work-items/open/20260531-005557-single-binary-insomnia-cli/item.md
rename to work-items/closed/20260531-005557-single-binary-insomnia-cli/item.md
index 364fe500..d4b40451 100644
--- a/work-items/open/20260531-005557-single-binary-insomnia-cli/item.md
+++ b/work-items/closed/20260531-005557-single-binary-insomnia-cli/item.md
@@ -2,12 +2,12 @@
 id: 20260531-005557-single-binary-insomnia-cli
 slug: single-binary-insomnia-cli
 title: CLI: migrate toward a single insomnia binary
-status: open
+status: closed
 kind: task
 priority: P2
 labels: [cli, architecture, nix]
 created_at: 2026-05-31T00:55:57Z
-updated_at: 2026-05-31T04:32:30Z
+updated_at: 2026-05-31T12:15:50Z
 assignee: null
 legacy_ticket: null
 ---
diff --git a/work-items/closed/20260531-005557-single-binary-insomnia-cli/resolution.md b/work-items/closed/20260531-005557-single-binary-insomnia-cli/resolution.md
new file mode 100644
index 00000000..aa25de41
--- /dev/null
+++ b/work-items/closed/20260531-005557-single-binary-insomnia-cli/resolution.md
@@ -0,0 +1,27 @@
+Completed the umbrella migration from the previous two-command installed layout toward a single primary `insomnia` executable.
+
+Completed phases:
+- `insomnia-pod-subcommand-runtime`: moved Pod runtime startup behind `pod::entrypoint` and added `insomnia pod ...` dispatch.
+- `spawn-through-insomnia-pod-subcommand`: changed internal spawn/restore defaults to typed runtime command resolution using current executable plus the `pod` prefix argument.
+- `remove-insomnia-pod-binary`: removed the long-term `insomnia-pod` binary/package/devshell/flake output.
+- Follow-up cleanup removed `INSOMNIA_POD_COMMAND` and `INSOMNIA_RESOURCE_DIR`, keeping the runtime command/config surface narrower.
+
+Outcome:
+- The installed package exposes `bin/insomnia` only.
+- `insomnia pod ...` is the Pod runtime entrypoint; Pods remain separate processes.
+- Internal spawn/restore uses typed command construction rather than shell string parsing.
+- `insomnia-pod` is not kept as a compatibility alias.
+- Headless `insomnia memory lint` behavior remains part of the `insomnia` CLI surface.
+
+Validation/evidence across completed phases included:
+- `insomnia pod --help`
+- focused parser/spawn/restore tests
+- `cargo fmt --check`
+- `cargo check -p tui -p pod -p client`
+- `nix build .#insomnia`
+- checks that `bin/insomnia-pod` is absent
+- `./tickets.sh doctor`
+- `git diff --check`
+
+Follow-up intentionally remains separate:
+- `insomnia-crate-cli-owner` now tracks the architectural cleanup where the `insomnia` crate owns the product CLI/binary entrypoint and `tui` becomes a library implementation crate. That is not required for this umbrella's original single-installed-binary migration to be complete.
diff --git a/work-items/open/20260531-005557-single-binary-insomnia-cli/thread.md b/work-items/closed/20260531-005557-single-binary-insomnia-cli/thread.md
similarity index 51%
rename from work-items/open/20260531-005557-single-binary-insomnia-cli/thread.md
rename to work-items/closed/20260531-005557-single-binary-insomnia-cli/thread.md
index 30831630..31d095d0 100644
--- a/work-items/open/20260531-005557-single-binary-insomnia-cli/thread.md
+++ b/work-items/closed/20260531-005557-single-binary-insomnia-cli/thread.md
@@ -36,4 +36,39 @@ Revised decision from user discussion:
 Initial implementation should start by extracting the Pod runtime into a library entrypoint and adding `insomnia pod ...`; subsequent steps can migrate spawn defaults and remove `insomnia-pod` from packaging.
 
 
+---
+
+<!-- event: close author: hare at: 2026-05-31T12:15:50Z status: closed -->
+
+## Closed
+
+Completed the umbrella migration from the previous two-command installed layout toward a single primary `insomnia` executable.
+
+Completed phases:
+- `insomnia-pod-subcommand-runtime`: moved Pod runtime startup behind `pod::entrypoint` and added `insomnia pod ...` dispatch.
+- `spawn-through-insomnia-pod-subcommand`: changed internal spawn/restore defaults to typed runtime command resolution using current executable plus the `pod` prefix argument.
+- `remove-insomnia-pod-binary`: removed the long-term `insomnia-pod` binary/package/devshell/flake output.
+- Follow-up cleanup removed `INSOMNIA_POD_COMMAND` and `INSOMNIA_RESOURCE_DIR`, keeping the runtime command/config surface narrower.
+
+Outcome:
+- The installed package exposes `bin/insomnia` only.
+- `insomnia pod ...` is the Pod runtime entrypoint; Pods remain separate processes.
+- Internal spawn/restore uses typed command construction rather than shell string parsing.
+- `insomnia-pod` is not kept as a compatibility alias.
+- Headless `insomnia memory lint` behavior remains part of the `insomnia` CLI surface.
+
+Validation/evidence across completed phases included:
+- `insomnia pod --help`
+- focused parser/spawn/restore tests
+- `cargo fmt --check`
+- `cargo check -p tui -p pod -p client`
+- `nix build .#insomnia`
+- checks that `bin/insomnia-pod` is absent
+- `./tickets.sh doctor`
+- `git diff --check`
+
+Follow-up intentionally remains separate:
+- `insomnia-crate-cli-owner` now tracks the architectural cleanup where the `insomnia` crate owns the product CLI/binary entrypoint and `tui` becomes a library implementation crate. That is not required for this umbrella's original single-installed-binary migration to be complete.
+
+
 ---