--- title: "/c// — channel-tagged copies — AI Crawler Index" description: "Every document on this host is also served under /c// — the same bytes, at an address that records which directory or registry sent you. The canonical is always the untagged path." canonical: "https://www.pathwren.workers.dev/c" url: "https://www.pathwren.workers.dev/c.md" format: "markdown" source: "the bytes of /c, in the build that wrote the page" generator: "surfaces/ai-crawler-index/build.py" generated: "2026-09-06T02:46:29+00:00" license: "CC0-1.0" --- # /c// — the same document, at an address that says where you came from > Every document on this host is also served under /c// — the same bytes, at an address that records which directory or registry sent you. The canonical is always the untagged path. ```bash curl -s https://www.pathwren.workers.dev/openapi.json # the document curl -s https://www.pathwren.workers.dev/c/apis-io/openapi.json # the same bytes, tagged apis-io ``` Every document on this host is also served under /c// — the same bytes, at an address that records which directory or registry sent you. The canonical is always the untagged path. ## The rule, in full - `/c//` serves `/` byte for byte. Not a redirect: a client that does not follow redirects still gets the document, in one request. - Every tagged copy carries `Link: <…>; rel="canonical"` naming the untagged address (RFC 6596). **Index the canonical**; these are not 231 copies of a page, they are one page with 231 entrances. - To strip it: `s|^/c/[^/]+/|/|`. That is the whole transform. - `/c/` with no document after it serves the site root. - A channel name that is not in the register is still *served* — a 404 at a directory's address costs the placement — it is simply recorded untagged. A stranger cannot invent a bucket by typing a URL. - The query spelling `?c=` means the same thing and obeys the same register. Path form exists because some addresses cannot carry a query string at all: a Go module path is one, a robots.txt line is another. ## What is recorded, and what is not The channel name, plus the same request fields every web server logs: path, status, user-agent, referer, a truncated hash of the address. No cookies, no JavaScript, no fingerprinting, no cross-site anything — the tag is in the URL you were given, which is the only reason it exists. [/privacy.html](https://www.pathwren.workers.dev/privacy.html) is the full log schema; it is short. ## If you are cmd/go `/c` is not a Go module root and neither is any path under it. **This host serves no `go-import` meta tag anywhere**, because it publishes no Go module. A module path of ours ending in `.git` resolves by the generic VCS rule to a real repository — see [/git](https://www.pathwren.workers.dev/git) — which contains no `.go` files and is an archive rather than a library. `GoCommand/1 (+https://go.dev/cmd/go)` asked this address `?go-get=1` at 2026-09-05T23:47:40Z while walking the prefixes of `www.pathwren.workers.dev/c/go-module-proxy/git/ai-crawler-index.git`, and got a 404 that meant “no such address” when the true answer was “a real address, and not a module root”. This page is that answer. ## Examples | Tagged address | The document it serves | | --- | --- | | `https://www.pathwren.workers.dev/c/apis-io/openapi.json` | `/openapi.json` | | `https://www.pathwren.workers.dev/c/pypi-registry/openapi.json` | `/openapi.json` | | `https://www.pathwren.workers.dev/c/rubygems-registry/openapi.json` | `/openapi.json` | | `https://www.pathwren.workers.dev/c/go-module-proxy/openapi.json` | `/openapi.json` | 231 channel names are declared. The register itself is not published — knowing which directory a URL was minted for tells a reader nothing they cannot see from the URL they hold. ## Sitemap - [Full sitemap (XML)](https://www.pathwren.workers.dev/sitemap.xml) — every page, with dates - [Full sitemap (markdown)](https://www.pathwren.workers.dev/sitemap.md) — the same map, readable - [llms.txt](https://www.pathwren.workers.dev/llms.txt) — the whole host in one text file - [documents.json](https://www.pathwren.workers.dev/documents.json) — every document, with its ETag - [A2A agents](https://www.pathwren.workers.dev/a2a.html) - [About and method](https://www.pathwren.workers.dev/about.html) - [API](https://www.pathwren.workers.dev/api.html) - [/c//](https://www.pathwren.workers.dev/c) - [Changelog](https://www.pathwren.workers.dev/changelog.html) - [Compliance](https://www.pathwren.workers.dev/compliance) - [Contact](https://www.pathwren.workers.dev/contact) - [Impressum · Anbieterkennzeichnung](https://www.pathwren.workers.dev/impressum) - [AI Crawler Index](https://www.pathwren.workers.dev/index.html) - [No model runs here](https://www.pathwren.workers.dev/inference.html) - [Legal](https://www.pathwren.workers.dev/legal) - [MCP server](https://www.pathwren.workers.dev/mcp-doctor.html) - [MCP server](https://www.pathwren.workers.dev/mcp-lint.html) - [MCP server](https://www.pathwren.workers.dev/mcp-netcheck.html) - [MCP server](https://www.pathwren.workers.dev/mcp-robots.html) - [MCP transport: the GET and HEAD leg](https://www.pathwren.workers.dev/mcp-transport.html) - [MCP server](https://www.pathwren.workers.dev/mcp-triage.html) - [MCP server](https://www.pathwren.workers.dev/mcp.html) - [Packages](https://www.pathwren.workers.dev/packages.html) - [Pricing](https://www.pathwren.workers.dev/pricing) - [Privacy](https://www.pathwren.workers.dev/privacy.html) - [API reference](https://www.pathwren.workers.dev/reference) - [Access, keys and sign-up](https://www.pathwren.workers.dev/register) - [Security posture](https://www.pathwren.workers.dev/security.html) - [Services](https://www.pathwren.workers.dev/services) - [Upstream status](https://www.pathwren.workers.dev/status.html) - [Terms of use](https://www.pathwren.workers.dev/terms.html) - [Trust](https://www.pathwren.workers.dev/trust) ## Machine copies of this page - [HTML (canonical)](https://www.pathwren.workers.dev/c) - [JSON](https://www.pathwren.workers.dev/c.json) - [Markdown](https://www.pathwren.workers.dev/c.md) — this document This document is a markdown rendering of [https://www.pathwren.workers.dev/c](https://www.pathwren.workers.dev/c), generated from that page's own bytes in the same build. The HTML page is canonical.