docs: correct spec+plan for self-vs-inputs in imports

The fix subagent found that inputs.hermes-agent.nixosModules.default
inside `imports` causes infinite recursion in this repo's wiring
(inputs comes from _module.args, which merges after imports resolve;
self comes from specialArgs, which is available at import-time).
Tested both ways. Update docs to show self.inputs, matching commit
31e1910.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vbvwg3Qt2u9nbkEA3wL17S

docs/superpowers/specs/2026-09-08-hermes-agent-nixos-design.md

@@ -48,10 +48,16 @@ hermes-agent = {
 ```
 
 Import the upstream module **from inside the profile module itself**, via
-`imports = [ inputs.hermes-agent.nixosModules.default ];` — using the
-`inputs` module arg already provided repo-wide by
-`_module.args.inputs = self.inputs;` in `machines/configuration.nix`.
-**Correction (found during implementation, 2026-09-08):** this is
+`imports = [ self.inputs.hermes-agent.nixosModules.default ];` — using
+`self` (available via `specialArgs = { inherit self; };` in
+`machines/configuration.nix`), not the `inputs` module arg. **Correction
+(found during implementation, 2026-09-08):** `inputs` is supplied via
+`_module.args.inputs = self.inputs;`, set inside a config block — but
+NixOS resolves a module's `imports` list before `_module.args` assignments
+merge, so anything referenced inside `imports` must come from
+`specialArgs` (fixed up front) instead. Using `inputs` here reproduces
+`infinite recursion encountered`; `self.inputs.hermes-agent` is the same
+flake input, reached the way that actually works. Separately, this is
 deliberately *not* wired through `machines/configuration.nix`'s per-machine
 module lists. NixOS's module system errors on a definition for an
 undeclared option regardless of `lib.mkIf`'s condition — so declaring
@@ -72,14 +78,14 @@ repo's standard profile pattern:
   config,
   lib,
   pkgs,
-  inputs,
+  self,
   ...
 }:
 let
   cfg = config.my.profiles.hermes-agent;
 in
 {
-  imports = [ inputs.hermes-agent.nixosModules.default ];
+  imports = [ self.inputs.hermes-agent.nixosModules.default ];
 
   options.my.profiles.hermes-agent.enable =
     lib.mkEnableOption "Hermes Agent (Telegram + Email gateway)";