v2.0.0 — Pure glue architecture: zero copied code, pluggable channels

BREAKING: Complete architectural rewrite.

Before: Copied x-reader's fetcher code into readers/ (1205 lines of borrowed code)
After: Pluggable channel system where each channel is a thin wrapper (~50 lines)
       around the best external tool for that platform. Zero copied code.

Architecture:
- channels/base.py — Universal Channel interface (read, search, check)
- channels/web.py — Jina Reader API (swappable)
- channels/github.py — GitHub API (swappable)
- channels/twitter.py — birdx + Jina fallback (swappable)
- channels/youtube.py — yt-dlp (swappable)
- channels/reddit.py — Reddit JSON API + proxy (swappable)
- channels/rss.py — feedparser (swappable)
- channels/bilibili.py — Bilibili API (swappable)
- channels/exa_search.py — Exa semantic search (swappable)

Key design: every backend can be swapped by changing ONE file.
YouTube dies? Change youtube.py. Exa sucks? Swap exa_search.py for Tavily.
Nothing else changes.

Removed: reader.py, schema.py, readers/, search/, utils/ (all x-reader code)
Tests: 36/36 passing

agent_eyes/channels/github.py

@@ -0,0 +1,120 @@
+# -*- coding: utf-8 -*-
+"""GitHub — via GitHub REST API (free, no config needed).
+
+Backend: GitHub API v3
+Swap to: gh CLI, or any GitHub API wrapper
+"""
+
+import requests
+from urllib.parse import urlparse
+from .base import Channel, ReadResult, SearchResult
+from typing import List
+
+
+class GitHubChannel(Channel):
+    name = "github"
+    description = "GitHub repos, issues, PRs, code"
+    backends = ["GitHub API"]
+    tier = 0
+
+    API = "https://api.github.com"
+
+    def _headers(self, config=None):
+        h = {"Accept": "application/vnd.github+json"}
+        token = config.get("github_token") if config else None
+        if token:
+            h["Authorization"] = f"Bearer {token}"
+        return h
+
+    def can_handle(self, url: str) -> bool:
+        domain = urlparse(url).netloc.lower()
+        return "github.com" in domain
+
+    async def read(self, url: str, config=None) -> ReadResult:
+        path = urlparse(url).path.strip("/").split("/")
+
+        if len(path) < 2:
+            raise ValueError(f"Invalid GitHub URL: {url}")
+
+        owner, repo = path[0], path[1]
+        headers = self._headers(config)
+
+        # Issues/PRs
+        if len(path) >= 4 and path[2] in ("issues", "pull"):
+            num = path[3]
+            resp = requests.get(f"{self.API}/repos/{owner}/{repo}/issues/{num}", headers=headers, timeout=15)
+            resp.raise_for_status()
+            data = resp.json()
+
+            # Get comments
+            comments_text = ""
+            if data.get("comments", 0) > 0:
+                cr = requests.get(f"{self.API}/repos/{owner}/{repo}/issues/{num}/comments",
+                                  headers=headers, params={"per_page": 20}, timeout=15)
+                if cr.ok:
+                    for c in cr.json():
+                        comments_text += f"\n\n---\n**{c.get('user', {}).get('login', '')}** ({c.get('created_at', '')}):\n{c.get('body', '')}"
+
+            return ReadResult(
+                title=data.get("title", ""),
+                content=(data.get("body", "") or "") + comments_text,
+                url=url,
+                author=data.get("user", {}).get("login", ""),
+                date=data.get("created_at", ""),
+                platform="github",
+                extra={"state": data.get("state"), "comments": data.get("comments", 0),
+                       "reactions": data.get("reactions", {}).get("total_count", 0)},
+            )
+
+        # Repo
+        resp = requests.get(f"{self.API}/repos/{owner}/{repo}", headers=headers, timeout=15)
+        resp.raise_for_status()
+        data = resp.json()
+
+        # Get README
+        readme_text = ""
+        rr = requests.get(f"{self.API}/repos/{owner}/{repo}/readme", headers=headers, timeout=15)
+        if rr.ok:
+            import base64
+            readme_data = rr.json()
+            if readme_data.get("encoding") == "base64":
+                readme_text = base64.b64decode(readme_data["content"]).decode("utf-8", errors="replace")
+
+        return ReadResult(
+            title=f"{owner}/{repo}",
+            content=readme_text or data.get("description", ""),
+            url=url,
+            author=owner,
+            platform="github",
+            extra={"stars": data.get("stargazers_count", 0), "forks": data.get("forks_count", 0),
+                   "language": data.get("language", ""), "description": data.get("description", "")},
+        )
+
+    async def search(self, query: str, config=None, **kwargs) -> List[SearchResult]:
+        language = kwargs.get("language")
+        limit = kwargs.get("limit", 5)
+
+        q = query
+        if language:
+            q += f" language:{language}"
+
+        resp = requests.get(
+            f"{self.API}/search/repositories",
+            headers=self._headers(config),
+            params={"q": q, "sort": "stars", "per_page": min(limit, 30)},
+            timeout=15,
+        )
+        resp.raise_for_status()
+
+        results = []
+        for repo in resp.json().get("items", []):
+            results.append(SearchResult(
+                title=repo.get("full_name", ""),
+                url=repo.get("html_url", ""),
+                snippet=repo.get("description", ""),
+                date=repo.get("updated_at", ""),
+                extra={"stars": repo.get("stargazers_count", 0),
+                       "forks": repo.get("forks_count", 0),
+                       "language": repo.get("language", "")},
+            ))
+        return results