chore: remove IDENTITY.md (moved to workspace repo)

Merge pull request #6 from allenporter/chore/update-identity

chore: add IDENTITY.md and update memory context

feat(github): support threaded replies to review comments and handle PR closure

Merge pull request #4 from allenporter/feat/github-adapter

docs: add GithubAdapter to README and address lint errors

feat: add GitHub PR adapter using gh CLI

Improve memory management: add in-context summaries and auto-init memory folder

feat: refine agent starter files with detailed operational guidelines and add workspace initialization tests.

feat: Implement workspace initialization and assemble systemic instructions from new starter files.

Refactor memory handling by replacing `MemoryToolSet` with a `load_memory_context` function, updating `adk-coder`, and adjusting related tests.

feat: Implement persistent agent memory (key-value and journal) with new tools and embedded runtime integration.

feat: Add support for workspace-specific environment variables and external MCP servers to the agent runtime.

refactor: extract Runtime protocol, merge orchestrator into host

refactor: introduce Runtime protocol and move embedded agent execution from orchestrator to runtime.