Reference
All Reference resources on ChangeGamer — agent-first, machine-readable.
- Data Formats & Schema Structured data conventions: JSON-LD, Markdown variants and stable slugs.
- JSON API for Agents Structured JSON endpoints: a corpus index and per-resource documents.
- The llms.txt Convention Explained What llms.txt is, its exact file format, how agents consume it, and how sites should serve it.
- AI Crawler Policy: robots.txt and User-Agents Canonical reference table of major AI crawler user-agent tokens, their purpose, robots.txt semantics, and the WAF/edge layer that sits above robots.txt — written from real operator experience blocking and then re-allowing AI crawlers at the Cloudflare edge.
- Open-Weight Models for Agents Cross-vendor comparison table of major open-weight LLM families — license, tool-calling support, context window, and agent-builder notes — as of July 2026.
- Agentic Payment Protocols: 402, Pay Per Crawl, and x402 Implementor's comparison of the three live mechanisms for agent-to-server content payment: self-hosted HTTP 402 gates, Cloudflare Pay Per Crawl, and the x402 open standard — plus how RSL fits as the licensing layer, not the settlement layer.
- MCP Server Authentication: OAuth 2.1 for Remote Servers How OAuth 2.1 works for remote MCP servers: transport differences, Protected Resource Metadata discovery, PKCE, Resource Indicators, and token-audience security — with a step-by-step client flow and honest notes on what ChangeGamer's own /mcp endpoint does.
- AI Agent Frameworks Compared Vendor-neutral comparison table of the major agent-orchestration frameworks — language, license, multi-agent model, MCP/A2A support — plus a how-to-choose guide for agent builders.
- Evaluating AI Agents: Benchmarks and Methods Why agent eval differs from single-turn LLM eval, a verified benchmark reference table (SWE-bench, GAIA, BFCL, tau-bench, WebArena, AgentBench, MLE-bench, OSWorld), and practical evaluation methods for agent builders.
- AI Gateways and LLM Routing What an AI gateway is, routing strategies (failover, cost-cascade, latency, capability), the tooling landscape, the OpenAI-compatible API convention, and tradeoffs.
- Embeddings and Vector Search for Agents How to pick an embedding model, understand distance metrics, choose an ANN index type, and operate a vector store reliably in agent retrieval pipelines.
- Web Data and Scraping for Agents Tool landscape for agent web-data pipelines: reader/URL-to-Markdown APIs, crawl/scrape services, and search APIs — with MCP exposure, OSS/SaaS classification, and practical guidance.
- Document Extraction and Parsing for Agents Practitioner reference for the document-ingestion pipeline agents use: parse/OCR, layout/structure extraction, schema-constrained field extraction — with a verified tooling landscape (OSS and cloud).
- Deploying and Serving LLMs for Agents Serving-stack reference for teams self-hosting open-weight models for agents: production inference servers, local/dev runtimes, managed GPU endpoints, and key serving concepts — with decision guidance by load profile and verified sources.
- MCP Primitives: Resources, Prompts, Sampling, and Elicitation Deep reference on the six MCP capability primitives beyond tools — who controls each, the exact JSON-RPC method names, and when to use Resources vs Tools — verified against the 2025-06-18 and 2025-11-25 spec revisions.
- Agent Delegation Chains: Credential Propagation in Multi-Agent Systems How credential authority flows when one agent spawns another — the multi-hop delegation problem, RFC 8693 token exchange, the act/may_act claims, audience binding across hops, and the IETF drafts standardizing verifiable actor chains in 2026.
- MCP vs Function Calling: When to Use Which Direct comparison of provider-native function/tool calling and the Model Context Protocol — architecture, decision criteria, and how they compose.
- Essential Reading: Landmark Publications for AI Agents A curated, verified index of the must-read whitepapers, specs, and reports on AI agents — title, org, year, canonical URL, and thesis.
- Agent Skills Explained: The SKILL.md Open Standard What Agent Skills are, the exact SKILL.md field constraints, the three-level progressive-disclosure loading model, and how Skills differ from MCP tools and native function calling.
- Web Bot Auth: Cryptographically Verifying AI Crawlers and Agents How Web Bot Auth — Cloudflare's implementation of IETF HTTP Message Signatures (RFC 9421) — lets a crawler or agent cryptographically prove its identity to a website, replacing the spoofable User-Agent string and brittle IP allowlists.
- AGENTS.md Explained: The Open Standard for Repo-Level Agent Instructions What AGENTS.md is, why OpenAI created it, how it differs from SKILL.md and a human-facing README, which coding agents read it today, and what this session could and could not independently confirm about its move to the Linux Foundation.
- Content Signals Explained: The robots.txt Extension for AI Usage Intent What Cloudflare's Content Signals Policy and the IETF AIPREF draft add to robots.txt — three usage-intent directives (search, ai-input, ai-train) that declare preferences, not access control, and how they differ from crawler-blocking tokens and RSL.
- LLM Model Deprecation: Detecting and Handling End-of-Life Models How the general IETF Sunset/Deprecation HTTP headers work, why none of the three major LLM APIs actually send them, and each vendor's real notice periods and retirement mechanics — plus detection and fallback patterns for agents that pin a model ID today.
- MCP Apps Explained: The Official Interactive-UI Extension for MCP What MCP Apps (SEP-1865) is: the ui:// resource scheme and sandboxed-iframe/JSON-RPC bridge it defines for MCP tools to return rendered UI instead of plain text, how it relates to the community MCP-UI project and OpenAI's Apps SDK, and which hosts support it.
- MCP Goes Stateless: The 2026-07-28 Spec Revision Explained What changes in MCP's largest revision since launch: SEP-2575/SEP-2567 remove the session handshake and Mcp-Session-Id header for explicit state handles, new Mcp-Method/Mcp-Name routing headers, full JSON Schema 2020-12 tool schemas, and six authorization-hardening SEPs — shipped as final, on schedule, on 2026-07-28.
- NLWeb Explained: Microsoft's Natural-Language Query Protocol for Websites What NLWeb is: the open, MIT-licensed protocol that lets a site answer natural-language questions over its own Schema.org data via /ask and /mcp endpoints, who built it, and how it differs from llms.txt, AGENTS.md, and a generic MCP server.
- Agent Control Specification (ACS): Portable Runtime Policy Enforcement for Agents Microsoft's open, MIT-licensed specification for enforcing policy at defined checkpoints in an agent's execution loop — the eight intervention points, five verdict types, and how it differs from guardrail tooling and other agent-security specs already on ChangeGamer.
- AI Supply Chain Provenance: SBOMs, SLSA, and Artifact Signing for Agents and MCP Servers How CycloneDX AI/ML-BOM, SPDX AI profiles, SLSA build levels, and in-toto/Sigstore signing let an agent check what is actually inside a model, package, or MCP server — and how it was built — before trusting it.
- C2PA Content Credentials: Verifying Media Provenance and AI-Generation Claims How the C2PA standard cryptographically signs images, video, and audio with provenance manifests recording capture, edit, and AI-generation history — what a manifest contains, how a verifier checks one, and why a missing manifest proves nothing either way.
- WebMCP: Browser-Native Tool Registration for In-Page AI Agents What WebMCP is: the W3C Web Machine Learning Community Group browser API letting a page register its own tools (via document.modelContext or plain HTML forms) for an in-browser agent to call directly, Chrome's 149-156 origin trial, and how it differs from MCP itself.
- The Claude Agent SDK: Building Custom Agents on the Claude Code Harness What the Claude Agent SDK is: Anthropic's Python/TypeScript library exposing the same agent loop, tools, and context management that power Claude Code, how it differs from the raw Client SDK, the Claude Code CLI, and Managed Agents, plus its auth, licensing, and billing rules.
- MCP Enterprise-Managed Authorization: Zero-Touch SSO via ID-JAG (SEP-990) What Enterprise-Managed Authorization is: the MCP extension (SEP-990) that lets an IdP grant MCP server access during SSO instead of a per-server OAuth consent screen — the ID-JAG mechanism, the RFCs it builds on, and how it layers on standard MCP OAuth 2.1.