* Refactor skill turn harness, fix session serialization, and resolve E2E test failures
* Ignore symlinks during workspace copying and enforce sandbox boundaries in playbooks
* Refactor interaction loop to use clean async generator-based Event flow
* Introduce dedicated async generator test and improve autonomous tester instructions
* Enforce strict sandbox awareness and Step 8 policy import gates
* Track and display conversation context size next to turn headers
* Streamline token usage display to only appear in turn step headers
* Refactor token usage tracking to show actual active context size
* Implement progress tracking block and human recovery in test harness
* docs: document and categorize repository skills and tools
* docs: add maintenance instructions for updating FACTORIES.md tables
* docs: add missing data-catalog-policy-tag factory in FACTORIES.md
* docs: add missing networking stage sub-factories in FACTORIES.md
* docs: add systematic commands for discovering module/stage factories in FACTORIES.md
* docs: add missing vpcs factories in 0-org-setup and 2-project-factory stages
