chore: v2.8.13 — Artifacts reinstall/edit/installs, agent steps in chat, pick a local file to attach, Windows paths as links

- Chat: an Agent step shows its task, status and tool calls and opens its conversation in place; Windows paths (E:\…, C:/…) in replies open as files
- Prompt: attach a file on this computer by path (native picker), clearer too-large messages
- Artifacts: edit title/description and a skill's files (new snapshot), Reinstall, install history, Hub-only rows, skills installed into ~/.claude/skills and ~/.agents/skills
- Files: batch upload of small files in one extract
- AI Tools: npm install falls back to --prefix ~/.local when the global prefix is not writable

server/openapi-extra/files.js

@@ -149,6 +149,58 @@ const OPS = [
       status: 201,
     },
   ],
+  [
+    "post",
+    "/upload-check",
+    "Before a batch: the names already taken, and whether a batch can go there",
+    {
+      note: "`taken`: which of `paths` (relative to `dir`) exist; `batch: false` = send the files one by one (a member's folder whose `write-as` predates `extract`).",
+      body: json({ dir: { type: "string", default: "" }, paths: pathsArr }, ["paths"]),
+      ok: {
+        description: "`{taken, batch}`",
+        content: {
+          "application/json": {
+            schema: {
+              type: "object",
+              properties: { taken: pathsArr, batch: { type: "boolean" } },
+            },
+          },
+        },
+      },
+    },
+  ],
+  [
+    "post",
+    "/upload-batch",
+    "Upload many small files in one request (≤ 5,000 files, 16 MB each, 256 MB in all)",
+    {
+      note: "Body: a 4-byte big-endian length, that many bytes of JSON `{files: [{path, size, mtime?}]}` (paths relative to `dir`), then each file's bytes in that order. Planned whole before the first write — a taken name under `conflict=fail` is ONE 409 naming them all; a member's batch is one `write-as extract` (409 EUPGRADE until `agenthub server install-system` is re-run). 400 EBADBODY for a malformed or short body.",
+      parameters: [
+        { name: "dir", in: "query", schema: { type: "string", default: "" } },
+        { name: "conflict", in: "query", schema: conflict },
+      ],
+      body: {
+        required: true,
+        content: { "application/octet-stream": { schema: { type: "string", format: "binary" } } },
+      },
+      status: 201,
+      ok: {
+        description: "`{saved, skipped, paths}`",
+        content: {
+          "application/json": {
+            schema: {
+              type: "object",
+              properties: {
+                saved: { type: "integer" },
+                skipped: { type: "integer" },
+                paths: pathsArr,
+              },
+            },
+          },
+        },
+      },
+    },
+  ],
   [
     "get",
     "/zip",
@@ -180,8 +232,8 @@ function operations(prefix, idParam, opPrefix, note) {
     out[key][method] = {
       tags: ["Files"],
       summary,
-      description: `${note} ${errorCodes}`,
-      operationId: `${opPrefix}${sub.replace(/\/(\w)/g, (_, c) => c.toUpperCase())}`,
+      description: `${note} ${x.note ? `${x.note} ` : ""}${errorCodes}`,
+      operationId: `${opPrefix}${sub.replace(/[/-](\w)/g, (_, c) => c.toUpperCase())}`,
       parameters: [idParam, ...(x.parameters || [])],
       ...(x.body ? { requestBody: x.body } : {}),
       responses: { [x.status || 200]: x.ok || { description: "Done." } },