docs: remove obsolete nix package doc

docs/nix.md

@@ -1,75 +0,0 @@
-# Nix package
-
-INSOMNIA provides a flake package for installing the user-facing `insomnia` command without relying on a source checkout at runtime. The Pod runtime still runs as a separate process through `insomnia pod ...`; the installed package does not expose a separate `insomnia-pod` command.
-
-## Build
-
-From the repository root:
-
-```sh
-nix build .#
-```
-
-The default package is implemented by `package.nix` and builds the Cargo package `tui` as the installed binary `insomnia`. The `pod` crate remains a library dependency that provides the Pod runtime entrypoint used by `insomnia pod ...`. The derivation uses the checked-in `Cargo.lock`, so Cargo dependencies are fetched by the normal Nix Rust packaging path instead of by network access during the build.
-
-The package output contains:
-
-- `bin/insomnia` — terminal UI and `insomnia pod ...` runtime entrypoint.
-- `share/doc/insomnia/nix.md` — this document.
-- `share/doc/insomnia/environment.md` — environment-variable policy and supported variables.
-
-## Run
-
-After `nix build`:
-
-```sh
-./result/bin/insomnia pod --help
-./result/bin/insomnia
-```
-
-With flakes:
-
-```sh
-nix run .#insomnia
-nix run .#insomnia -- pod --help
-```
-
-`nix run .#` defaults to the TUI.
-
-## Configuration discovery
-
-The Nix package does not put user configuration, sessions, sockets, or other mutable state in the Nix store. The installed binary keeps the same path semantics as non-Nix builds:
-
-| Purpose | Override | `INSOMNIA_HOME` fallback | XDG / default fallback |
-| --- | --- | --- | --- |
-| User config (`profiles.toml`, prompt overrides, model/provider overrides) | `INSOMNIA_CONFIG_DIR` | `$INSOMNIA_HOME/config` | `$XDG_CONFIG_HOME/insomnia`, then `$HOME/.config/insomnia` |
-| Persistent data (`sessions/`, Pod metadata) | `INSOMNIA_DATA_DIR` | `$INSOMNIA_HOME` | `$HOME/.insomnia` |
-| Runtime state (sockets, lock files, live registry) | `INSOMNIA_RUNTIME_DIR` | `$INSOMNIA_HOME/run` | `$XDG_RUNTIME_DIR/insomnia`, then `$HOME/.insomnia/run` |
-
-Normal fresh startup is profile-based. The package includes the builtin default profile in the binary, user/project `profiles.toml` files may select or define profiles, and `insomnia pod --manifest <PATH>` remains a one-file compatibility/debug input. `INSOMNIA_USER_MANIFEST` and ambient `.insomnia/manifest.toml` discovery are not part of normal Pod/TUI startup. See [`environment.md`](environment.md) for the environment-variable policy; new configuration should prefer profiles/manifests/config files over additional environment variables.
-
-## Validation
-
-The package derivation has a credential-free install check that verifies:
-
-- `insomnia pod --help` starts successfully.
-- `insomnia` is installed and reaches argument parsing.
-- `bin/insomnia-pod` is not installed.
-- embedded builtin profiles do not require `share/insomnia/resources` at runtime.
-- this Nix usage document is present in the output.
-
-For full validation before handing changes to review, run:
-
-```sh
-nix build .#
-nix flake check
-cargo fmt --check
-cargo check -p tui -p pod -p client
-```
-
-These checks do not require provider credentials.
-
-## Known limitations
-
-- The package currently installs only the `insomnia` command; development-only wrappers from `devshell.nix` are not part of the installable package.
-- The TUI does not currently expose a conventional `--help` / `--version` CLI path, so the package smoke check uses an argument-parse failure path for the TUI rather than launching an interactive session.

package.nix

@@ -92,7 +92,6 @@ rustPlatform.buildRustPackage rec {
   doCheck = false;
 
   postInstall = ''
-    install -Dm644 docs/nix.md "$out/share/doc/insomnia/nix.md"
     install -Dm644 docs/environment.md "$out/share/doc/insomnia/environment.md"
   '';
 
@@ -110,7 +109,6 @@ rustPlatform.buildRustPackage rec {
     fi
     grep -q "invalid --session UUID" insomnia.err
 
-    test -f "$out/share/doc/insomnia/nix.md"
     test -f "$out/share/doc/insomnia/environment.md"
 
     runHook postInstallCheck