feat(backend): import public GitHub repositories

packages/backend/convex/_generated/api.d.ts

@@ -25,6 +25,7 @@ import type * as projectArtifacts from "../projectArtifacts.js";
 import type * as projectIssues from "../projectIssues.js";
 import type * as projectStore from "../projectStore.js";
 import type * as projects from "../projects.js";
+import type * as publicGit from "../publicGit.js";
 import type * as signals from "../signals.js";
 import type * as todos from "../todos.js";
 
@@ -52,6 +53,7 @@ declare const fullApi: ApiFromModules<{
   projectIssues: typeof projectIssues;
   projectStore: typeof projectStore;
   projects: typeof projects;
+  publicGit: typeof publicGit;
   signals: typeof signals;
   todos: typeof todos;
 }>;

packages/backend/convex/projects.ts

@@ -1,4 +1,5 @@
 import {
+  decodePublicGitImportResult,
   preparePublicGitSource,
   type ProjectImportOutcome,
   type ProjectView,
@@ -8,15 +9,17 @@ import {
 import { v } from "convex/values";
 import { Effect } from "effect";
 
+import { internal } from "./_generated/api";
 import type { Id } from "./_generated/dataModel";
 import { action, internalMutation, query } from "./_generated/server";
 import { createInitialArtifacts } from "./artifactModel";
-import { requireCurrentOrganization } from "./authz";
+import { requireAuthUserId, requireCurrentOrganization } from "./authz";
 import {
   makeProjectMutationStore,
   makeProjectQueryStore,
   persistPublicGitImportTransaction,
 } from "./projectStore";
+import { inspectPublicGit } from "./publicGit";
 
 // ---------------------------------------------------------------------------
 // Internal: persist a public Git import in one transaction
@@ -182,18 +185,31 @@ export const get = query({
 });
 
 // ---------------------------------------------------------------------------
-// Public action: import a public Git repository
-// (daemon wiring added in the Daemon phase)
+// Public action: import a public GitHub repository
 // ---------------------------------------------------------------------------
 
 export const importPublicGit = action({
   args: { repositoryUrl: v.string() },
-  handler: async (_ctx, args): Promise<ProjectImportOutcome> => {
-    // Normalize through the domain layer to validate the URL before the
-    // daemon adapter is wired.
-    await Effect.runPromise(preparePublicGitSource(args.repositoryUrl));
-    // The daemon PublicGit adapter is wired in the Daemon phase.
-    throw new Error("PublicGit import is not yet wired to the daemon adapter");
+  handler: async (ctx, args): Promise<ProjectImportOutcome> => {
+    const userId = await requireAuthUserId(ctx);
+    const source = await Effect.runPromise(
+      preparePublicGitSource(args.repositoryUrl)
+    );
+    const remote = await inspectPublicGit(source);
+    const validatedRemote = await Effect.runPromise(
+      decodePublicGitImportResult(remote)
+    );
+    return await ctx.runMutation(internal.projects.persistPublicGitImport, {
+      remote: {
+        defaultBranch: validatedRemote.defaultBranch,
+        documents: validatedRemote.documents.map((document) => ({
+          ...document,
+        })),
+        warnings: validatedRemote.warnings.map((warning) => ({ ...warning })),
+      },
+      source,
+      userId,
+    });
   },
 });
 

packages/backend/convex/publicGit.ts

@@ -0,0 +1,125 @@
+import {
+  CONTEXT_KINDS,
+  contextPathForKind,
+  MAX_CONTEXT_DOCUMENT_CHARACTERS,
+  type PreparedPublicGitSource,
+  type PublicGitImportResult,
+  type RepositoryContextDocument,
+} from "@code/primitives/project";
+
+const GITHUB_HOST = "github.com";
+const REQUEST_HEADERS = {
+  Accept: "application/vnd.github+json",
+  "User-Agent": "zopu-project-importer",
+} as const;
+
+const candidatePaths = {
+  agents: ["AGENTS.md"],
+  business: ["business.md", "docs/business.md"],
+  design: ["design.md", "docs/design.md"],
+  product: ["product.md", "docs/product.md"],
+  readme: ["README.md", "README", "readme.md"],
+  tech: ["tech.md", "docs/tech.md"],
+} as const;
+
+const encodePath = (path: string) =>
+  path
+    .split("/")
+    .map((segment) => encodeURIComponent(segment))
+    .join("/");
+
+const fetchTextCandidate = async (
+  repositoryPath: string,
+  branch: string,
+  path: string
+): Promise<string | null> => {
+  const url = `https://raw.githubusercontent.com/${encodePath(repositoryPath)}/${encodePath(branch)}/${encodePath(path)}`;
+  const response = await fetch(url, { headers: REQUEST_HEADERS });
+  if (response.status === 404) {
+    return null;
+  }
+  if (!response.ok) {
+    throw new Error(`GitHub returned ${response.status} for ${path}`);
+  }
+  const content = await response.text();
+  if (content.trim().length === 0) {
+    return null;
+  }
+  if (content.length > MAX_CONTEXT_DOCUMENT_CHARACTERS) {
+    throw new Error(`${path} exceeds the 200000 character import limit`);
+  }
+  return content;
+};
+
+const fetchContextDocument = async (
+  source: PreparedPublicGitSource,
+  branch: string,
+  kind: (typeof CONTEXT_KINDS)[number]
+): Promise<RepositoryContextDocument | null> => {
+  for (const candidate of candidatePaths[kind]) {
+    const content = await fetchTextCandidate(
+      source.repositoryPath,
+      branch,
+      candidate
+    );
+    if (content) {
+      return {
+        content,
+        kind,
+        path: contextPathForKind(kind),
+      };
+    }
+  }
+  return null;
+};
+
+const readDefaultBranch = async (
+  source: PreparedPublicGitSource
+): Promise<string> => {
+  if (source.host !== GITHUB_HOST) {
+    throw new Error("Repository import currently supports public GitHub URLs");
+  }
+  const response = await fetch(
+    `https://api.github.com/repos/${encodePath(source.repositoryPath)}`,
+    { headers: REQUEST_HEADERS }
+  );
+  if (!response.ok) {
+    throw new Error(
+      response.status === 404
+        ? "Public GitHub repository not found"
+        : `GitHub returned ${response.status} while reading the repository`
+    );
+  }
+  const metadata = (await response.json()) as { default_branch?: unknown };
+  if (
+    typeof metadata.default_branch !== "string" ||
+    metadata.default_branch.length === 0
+  ) {
+    throw new Error("GitHub did not return a default branch");
+  }
+  return metadata.default_branch;
+};
+
+export const inspectPublicGit = async (
+  source: PreparedPublicGitSource
+): Promise<PublicGitImportResult> => {
+  const defaultBranch = await readDefaultBranch(source);
+  const candidates = await Promise.all(
+    CONTEXT_KINDS.map((kind) =>
+      fetchContextDocument(source, defaultBranch, kind)
+    )
+  );
+  const documents = candidates.filter(
+    (document): document is RepositoryContextDocument => document !== null
+  );
+  return {
+    defaultBranch,
+    documents,
+    warnings: CONTEXT_KINDS.filter(
+      (kind) => !documents.some((document) => document.kind === kind)
+    ).map((kind) => ({
+      message: "Canonical context file was not found in the repository",
+      path: contextPathForKind(kind),
+    })),
+  };
+};