diff --git a/work-items/open/20260531-111956-insomnia-crate-cli-owner/item.md b/work-items/open/20260531-111956-insomnia-crate-cli-owner/item.md
index e80d5de9..4d142837 100644
--- a/work-items/open/20260531-111956-insomnia-crate-cli-owner/item.md
+++ b/work-items/open/20260531-111956-insomnia-crate-cli-owner/item.md
@@ -7,7 +7,7 @@ kind: task
 priority: P2
 labels: [cli, tui, pod, architecture]
 created_at: 2026-05-31T11:19:56Z
-updated_at: 2026-05-31T11:19:56Z
+updated_at: 2026-05-31T12:42:22Z
 assignee: null
 legacy_ticket: null
 ---
diff --git a/work-items/open/20260531-111956-insomnia-crate-cli-owner/thread.md b/work-items/open/20260531-111956-insomnia-crate-cli-owner/thread.md
index 27d9d93f..446e332d 100644
--- a/work-items/open/20260531-111956-insomnia-crate-cli-owner/thread.md
+++ b/work-items/open/20260531-111956-insomnia-crate-cli-owner/thread.md
@@ -4,4 +4,99 @@
 
 Created by tickets.sh create.
 
+---
+
+<!-- event: plan author: hare at: 2026-05-31T12:42:22Z -->
+
+## Plan
+
+Read-only investigator: `insomnia-cli-owner-investigator-20260531`
+Classification: implementation-ready
+
+Conclusion:
+- Proceed with this ticket as one implementation ticket, but implement in ordered internal phases: move `PodRuntimeCommand` to `client`, make `tui` library-callable, move product CLI/binary ownership to `insomnia`, then update packaging/docs.
+
+Current code/dependency map:
+- `crates/tui` currently owns the product binary target:
+  - `crates/tui/Cargo.toml` has `[[bin]] name = "insomnia" path = "src/main.rs"`.
+  - `crates/tui/src/main.rs` owns top-level CLI parsing, `insomnia pod ...` dispatch, `insomnia memory lint`, and TUI launch.
+- `crates/insomnia` currently has no binary and mostly owns `PodRuntimeCommand` only.
+- `crates/pod` is already library-only and exposes `pod::entrypoint::run_cli_from`.
+- `client`, `pod`, and tests depend on `insomnia` only for `PodRuntimeCommand`, creating the wrong dependency direction for the desired architecture.
+- `package.nix` builds `-p tui` even though the installed command is `insomnia`.
+
+Recommended architecture:
+```text
+insomnia -> tui
+insomnia -> pod
+insomnia -> client
+tui      -> client
+pod      -> client
+client   -> no insomnia
+pod      -> no insomnia
+tui      -> no insomnia
+```
+
+Implementation plan:
+1. Move `PodRuntimeCommand` from `insomnia` to `client`.
+   - Prefer `client::runtime_command` with `pub use` from `client`.
+   - Update `client`, `pod`, and tests to use `client::PodRuntimeCommand`.
+   - Remove `insomnia` dependency from lower crates.
+2. Make `tui` a library implementation crate.
+   - Add `crates/tui/src/lib.rs`.
+   - Move TUI module declarations and TUI launch code behind public library API.
+   - Expose narrow API such as `LaunchOptions`, `LaunchMode`, `launch(...)`.
+   - Keep terminal setup/teardown in `tui` because it owns terminal behavior.
+   - Remove product CLI parsing and `pod`/`memory lint` dispatch from `tui`.
+3. Make `insomnia` own product CLI/binary.
+   - Add `crates/insomnia/src/main.rs`.
+   - Move top-level CLI parser/dispatch from `tui` to `insomnia`.
+   - Route `pod` to `pod::entrypoint::run_cli_from("insomnia pod", args)`.
+   - Route `memory lint` from `insomnia`, not `tui`.
+   - Route normal TUI modes to `tui::launch(...)` with a typed runtime command.
+4. Update packaging/docs.
+   - Remove `[[bin]] name = "insomnia"` from `tui`.
+   - Make `package.nix` build `-p insomnia`.
+   - Update active docs/dev commands from `cargo run -p tui -- ...` to `cargo run -p insomnia -- ...`.
+
+Important constraints:
+- Do not introduce `pod -> insomnia` or `tui -> insomnia`.
+- Do not keep compatibility for `cargo run -p tui -- ...`.
+- Do not reintroduce `insomnia-pod`, `INSOMNIA_POD_COMMAND`, or the separate `INSOMNIA_POD_RUNTIME_COMMAND`; that dev override is tracked by `dev-pod-runtime-command-env`.
+- Do not change Pod protocol/profile/manifest semantics.
+- Avoid broad TUI refactoring beyond making the crate library-callable.
+
+Critical risks:
+- `tui/src/main.rs` is large and mixes CLI, terminal lifecycle, event loop, key handling, and tests. Keep changes mechanical and avoid unrelated module cleanup.
+- Parser tests should move to `insomnia`; TUI behavior tests should remain with `tui`.
+- `memory_lint` is headless product CLI code and should not remain routed through TUI.
+- `--help` behavior needs explicit handling because the old parser mostly ignored unknown flags.
+
+Validation:
+- `cargo fmt --check`
+- `cargo check -p client -p pod -p tui -p insomnia`
+- `cargo test -p client`
+- `cargo test -p pod`
+- `cargo test -p tui`
+- `cargo test -p insomnia`
+- CLI smoke:
+  - `cargo run -p insomnia -- --help`
+  - `cargo run -p insomnia -- pod --help`
+  - `cargo run -p insomnia -- memory lint --help`
+  - `cargo run -p insomnia -- --session not-a-uuid`
+- Dependency ownership checks:
+  - `cargo tree -p client -e no-dev --depth 1`
+  - `cargo tree -p pod -e no-dev --depth 1`
+  - `cargo tree -p tui -e no-dev --depth 1`
+  - `cargo tree -p insomnia -e no-dev --depth 1`
+- If packaging changed:
+  - `nix build .#insomnia`
+  - `./result/bin/insomnia pod --help`
+  - `test -x ./result/bin/insomnia`
+  - `test ! -e ./result/bin/insomnia-pod`
+- `./tickets.sh doctor`
+- `git diff --check`
+- `rg "cargo run -p tui" docs README.md crates package.nix flake.nix`
+
+
 ---