refactor: move ate package from internal/k8s to internal/ to decouple…

… from Kubernetes dependencies

feat: add support for terminating existing orphan processes before st…

…arting the Python sidecar

antigravity: remove _resolve_localhost /etc/hosts hack (#328)

google-antigravity 0.1.7's _connect_websocket retries both "localhost"
and "127.0.0.1" when dialing localharness (local_connection.py:993), so
the sidecar no longer needs to patch /etc/hosts for substrate/gVisor
environments where localhost may not resolve.

Ref #325

antigravity: guard conversation_id for safe save_dir use (#312)

harness_server uses the caller-supplied conversation_id directly as a
per-conversation storage directory name (save_dir = state_dir /
conversation_id) before the Antigravity harness ever sees it, so a value
like "../escape" could traverse outside state_dir. Reject an empty id or
one containing a path separator or a "." / ".." component at the boundary
in _run_turn, returning an INVALID_ARGUMENT end frame.

This is intentionally only a path-safety guard, not the id-format
contract. The Antigravity harness owns that: it validates the forwarded
cascade_id (length and character set) per cl/948016352. Keeping the
format rule in one place avoids the two layers drifting.

chore: remove stale docs, gitignore, and Makefile entries (#329)

- CONTRIBUTING.md: drop 'make run-remote' (no such Makefile target)
- .gitignore: remove orphaned entries (local/remote_agent, sandbox-router,
  tasklog, axepp, google-cloud-sdk, test-sandbox-config.yaml)
- Makefile: add missing deps, clean-logs to .PHONY

antigravity: remove vertex env-var override (superseded by AGY 0.1.7) (#331)

* antigravity: remove vertex env-var override (superseded by AGY 0.1.7)

google-antigravity 0.1.7 reads GOOGLE_GENAI_USE_VERTEXAI /
GOOGLE_GENAI_USE_ENTERPRISE + GOOGLE_CLOUD_{PROJECT,LOCATION} natively,
so the sidecar no longer needs _vertex_kwargs_from_env to thread them
into LocalAgentConfig.

- Delete _vertex_kwargs_from_env + VertexKwargs.
- _build_default_config: bare LocalAgentConfig(system_instructions=...).
- _has_credentials: read project/location from env (SDK hydrates them
  onto VertexEndpoint, not LocalAgentConfig).
- Update tests accordingly.

Requires the 0.1.7 bump. Credential resolution is startup-only and
does not touch the save_dir/state_dir resume path.

Ref #325

* antigravity: drop stale _has_credentials docstring note about vertex env override

Interactions: persist interactions harness with durable dir and resume from it (#327)

interactions: make WorkDir authoritative for run_command (#335)

The interactions harness executed run_command relative to the process's
ambient working directory, which is not reliably the agent's workspace: with
no Cwd argument the command ran wherever the process cwd happened to be, and a
model-supplied Cwd (including "/") was honored blindly. As a result tool calls
often ran from "/" instead of the configured workspace (#332).

Make the workspace directory authoritative in the executor rather than relying
on ambient process state:

- Add AntigravityInteractionsConfig.WorkDir (defaults from AX_HARNESS_WORKDIR).
- run_command now resolves its directory via resolveRunDir: no Cwd -> WorkDir;
  relative Cwd -> joined under WorkDir; absolute Cwd -> honored as-is. Empty
  WorkDir preserves the previous process-cwd behavior.
- Add WorkspaceSystemInstruction to orient the agent about its working
  directory so it emits workspace-relative paths, and wire it in cmd/ax.

Fixes #332

Remove the binary (#334)

* Remove the binary

* chore: add e2e directory to .gitignore

* refactor: migrate binary file check to a dedicated workflow file

* fix: restrict binary file check to added, copied, or modified files

Update Agent Substrate import path (#374)