v4.0.0 — Spec Compliance, Gateway Consolidation, MCP Server

Highlights

• Relative paths everywhere — Replaced 1,271 custom <cc-polymath-root> references with standard relative paths across 111 files, making the plugin fully portable and Agent Skills spec-compliant.
• Gateway consolidation (40 → 23) — Merged closely related gateways for ~42% reduction in context budget at startup. Consolidated gateways: discover-infra (cloud + infrastructure + deployment + containers), discover-distributed (distributed-systems + realtime), discover-systems-theory (eBPF + IR + PLT + formal methods), plus 8 absorptions.
• MCP server for skill discovery — New TypeScript MCP server providing search_skills, list_skills, and skill_info tools, enabling tool-based discovery without consuming context tokens.
• Frontmatter standardization — Added name + description frontmatter to 160 files (INDEX.md files, leaf skills missing it, category name prefix fixes).

What's Changed

Breaking

• All <cc-polymath-root>/path references replaced with relative paths — custom path convention removed entirely
• 17 gateway directories removed and consolidated into existing gateways

Added

• MCP server (mcp-server/) with search, list, and info tools — indexes 450+ skills
• Enhanced plugin hooks: compact recovery (re-injects skill awareness after context compaction) and SubagentStart hook for Explore agents
• context: fork on /skills command to prevent discovery from polluting main context
• CHANGELOG.md with full version history
• Frontmatter on all INDEX.md files and leaf skills missing it

Changed

• Gateway count: 40 → 23 (consolidated related domains)
• Skill template simplified to align with Agent Skills spec (removed non-spec fields)
• Plugin version bumped to 4.0.0 across plugin.json, marketplace.json, all gateways

Removed

• 4.5MB of JSON report files from repository tracking (now CI artifacts only)
• Internal planning documents (AGENT reports, RESOURCES plans, SECURITY audit docs)
• 17 redundant gateway directories (merged into consolidated gateways)

Fixed

• All CI workflows passing (Smoke Tests, Security Audit, Validate Dates)
• Gitleaks false positives resolved via broadened allowlist for documentation examples

Verification

• 22/22 pytest tests passing
• validate.sh: 0 errors, 0 warnings
• All 3 GitHub Actions workflows green
• MCP server smoke test: 451 skills indexed, 23 gateways, search functional