≈1.7k tokens on demand. Your agent reads this file only when SKILL.md points to it.
Web Sources
Purpose: Information source tier classification, search query templates, and freshness management rules.
Read when: Entering the EVOLVE phase or when web research is required.
Source Tier Classification
| Tier |
Description |
Trust level |
Examples |
Usage |
| T1 |
Official primary sources |
Highest |
Anthropic documentation, MCP specification, Claude Code official docs |
Accept directly; cite as authoritative |
| T2 |
Official secondary + major community |
High |
Anthropic blog posts, official MCP examples, major GitHub repos (10k+ stars), Cursor/Windsurf docs |
Accept with verification; cross-reference with T1 when possible |
| T3 |
Community knowledge |
Medium |
Reddit r/ClaudeAI, developer blogs, X/Twitter posts from verified practitioners, YouTube tutorials from known experts |
Use as signals only; require T1/T2 corroboration for checklist changes |
| T4 |
Academic and research |
Variable |
Multi-agent system papers, prompt engineering research, AI safety publications |
Use for theoretical grounding; never as sole basis for checklist changes |
Tier Usage Rules
- Checklist changes (Safety Level C): Require at least 1 T1 or 2 T2 sources.
- Detection pattern updates (Safety Level B): Require at least 1 T2 source.
- Reference additions (Safety Level A): T3 acceptable if clearly attributed.
- Never accept T4 sources alone without T1/T2 cross-reference for any operational change.
Search Query Templates
Anthropic / Claude Code Best Practices
"Claude Code" "SKILL.md" best practices
"Claude Code" agent design patterns 2026
Anthropic "multi-agent" skill design
"claude code" "skill file" structure
site:docs.anthropic.com agent skill
site:platform.claude.com agent skills best practices
"skill authoring best practices" SKILL.md progressive disclosure
Anthropic "agent skills" specification open standard
MCP Specification and Patterns
"Model Context Protocol" agent design
MCP "skill definition" patterns
"MCP server" agent orchestration best practices
Multi-Agent System Design
multi-agent system "skill template" design
AI agent "self-evolution" safety patterns
"agent collaboration" protocol design
LLM agent "normalization" checklist
Prompt Engineering for Agent Skills
"prompt engineering" agent specialization 2026
"system prompt" structure best practices
AI agent "role definition" patterns
"agent boundaries" design patterns
Community Practices
site:reddit.com/r/ClaudeAI skill design
"claude code" agent tips
"AI agent" skill "quality assurance"
Freshness Management
Staleness Thresholds
| Content type |
Stale after |
Action |
| T1 sources (official docs) |
90 days |
Re-verify; update citations |
| T2 sources (blogs, repos) |
60 days |
Re-verify; flag if outdated |
| T3 sources (community) |
30 days |
Re-verify; consider removal |
| T4 sources (academic) |
180 days |
Re-verify relevance |
| Detection patterns |
60 days without recalibration |
Trigger GT-04 |
| This file (web-sources.md) |
90 days |
Full refresh of query templates |
Freshness Check Protocol
- Record last-verified date for each source citation.
- During EVOLVE phase, check all cited sources against staleness thresholds.
- Flag stale sources for re-verification.
- Remove sources that are no longer accessible (404, removed).
- Update query templates if search landscape has changed.
Collection Checklist
When performing web research during EVOLVE phase:
Currently Tracked Sources
T1: Official Primary
| Source |
URL pattern |
Last verified |
Notes |
| Anthropic Docs |
docs.anthropic.com |
Initial |
Claude Code documentation |
| Claude API Docs |
platform.claude.com/docs |
2026-04 |
Agent Skills spec, best practices, enterprise governance |
| MCP Specification |
modelcontextprotocol.io |
Initial |
Protocol definition |
| Agent Skills Spec |
github.com/anthropics/skills/blob/main/spec/agent-skills-spec.md |
2026-04 |
Open standard spec (kebab-case name, description constraints, security rules) |
| Anthropic Compliance API |
platform.claude.com (Compliance API) |
2026-04 |
Enterprise audit logs for skill activity tracking (launched 2026-03) |
| Skill Authoring Best Practices |
platform.claude.com/docs/en/agents-and-tools/agent-skills/best-practices |
2026-04 |
Progressive disclosure, ~50 line body recommendation, trigger testing |
T2: Official Secondary
| Source |
URL pattern |
Last verified |
Notes |
| Anthropic Blog |
anthropic.com/blog |
Initial |
Feature announcements, best practices |
| Anthropic Engineering Blog |
anthropic.com/engineering |
2026-04 |
"Equipping agents for the real world with Agent Skills" |
| Claude Code GitHub |
github.com/anthropics/claude-code |
Initial |
Examples, issues, discussions |
| agentskills.io |
agentskills.io |
2026-04 |
Cross-platform Agent Skills standard (file format, capability discovery, execution semantics planes) |
| Anthropic Skills Repo |
github.com/anthropics/skills |
2026-04 |
Official skill examples and spec |
T3: Community
| Source |
URL pattern |
Last verified |
Notes |
| r/ClaudeAI |
reddit.com/r/ClaudeAI |
Initial |
Community practices, tips |
| Developer blogs |
Various |
Initial |
Practitioner experiences |
| SkillsMP Marketplace |
skillsmp.com |
2026-04 |
Community skill distribution, quality patterns |
T4: Academic
| Source |
URL pattern |
Last verified |
Notes |
| Multi-agent papers |
arxiv.org |
Initial |
Theoretical foundations |
| Prompt engineering research |
Various |
Initial |
Design pattern research |
| "Noisy but Valid" (ICLR 2026) |
arxiv.org/abs/2601.20913 |
2026-04 |
TPR/FPR estimation with variance-corrected thresholds for imperfect judges — directly applicable to Gauge's rule calibration |
| Noise-Response Calibration |
arxiv.org/abs/2603.17172 |
2026-04 |
Causal intervention protocol for LLM-as-judge calibration via controlled perturbations |
