feat(mode): brain+gitea in all modes; drop iceboxed routing entry (#75)

Step 7 of the consolidation: reflect gitea-mcp as an available connection
(Gitea-as-audit-trail is an invariant going forward) and stop emitting the
now-iceboxed routing pod.

- cmd/hyperguild mode.go: every mode (cloud/client-local/sovereign) now lists
  brain + gitea; removed the client-local `routing` entry (koala:30310, the
  iceboxed pod). Tests updated to the new contract.
- .mcp.json: add gitea-mcp (git-mcp.d-ma.be, Bearer ${GITEA_MCP_TOKEN}).
- cmd/hyperguild/README: modes doc updated (brain+gitea, no routing).

Refs #75.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cmd/hyperguild/mode.go

@@ -59,31 +59,40 @@ func runMode(ctx context.Context, args []string, _ io.Reader, stdout, stderr io.
 	return nil
 }
 
+// giteaMCPURL is the public Gitea MCP endpoint (OAuth via Dex/Authentik). Gitea
+// is the audit-trail invariant of the consolidated single harness (#75), so every
+// mode lists it as an available connection.
+const giteaMCPURL = "https://git-mcp.d-ma.be/mcp"
+
+func brainEntry(brainURL string) map[string]any {
+	return map[string]any{
+		"url":         brainURL + "/mcp",
+		"description": "Brain MCP — knowledge query, write, ingestion, session log",
+	}
+}
+
+func giteaEntry() map[string]any {
+	return map[string]any{
+		"url":         giteaMCPURL,
+		"description": "Gitea MCP — issues/PRs/repo ops (audit-trail invariant)",
+	}
+}
+
 func modeCloud(brainURL string) map[string]any {
 	return map[string]any{
 		"mcpServers": map[string]any{
-			"brain": map[string]any{
-				"url":         brainURL + "/mcp",
-				"description": "Brain MCP — knowledge query, write, ingestion, session log",
-			},
+			"brain": brainEntry(brainURL),
+			"gitea": giteaEntry(),
 		},
 	}
 }
 
 func modeClientLocal(brainURL string) map[string]any {
+	// The routing pod is iceboxed (#75); the consolidated harness is brain + gitea.
 	return map[string]any{
 		"mcpServers": map[string]any{
-			"brain": map[string]any{
-				"url":         brainURL + "/mcp",
-				"description": "Brain MCP — knowledge query, write, ingestion, session log",
-			},
-			"routing": map[string]any{
-				"url":         "http://koala:30310/mcp",
-				"description": "Mode 2 routing pod — routes skill calls to LiteLLM/local",
-				"headers": map[string]any{
-					"X-Hyperguild-Mode": "client-local",
-				},
-			},
+			"brain": brainEntry(brainURL),
+			"gitea": giteaEntry(),
 		},
 	}
 }
@@ -92,10 +101,8 @@ func modeSovereign(brainURL string) map[string]any {
 	return map[string]any{
 		"_mode_note": "Sovereign mode primarily uses Crush + LiteLLM. This .mcp.json is provided as Claude Code fallback (e.g. emergency offline editing).",
 		"mcpServers": map[string]any{
-			"brain": map[string]any{
-				"url":         brainURL + "/mcp",
-				"description": "Brain MCP — knowledge query, write, ingestion, session log",
-			},
+			"brain": brainEntry(brainURL),
+			"gitea": giteaEntry(),
 		},
 	}
 }