AgentAPI can now save and restore conversation state across workspace
restarts. The module exports env vars (AGENTAPI_STATE_FILE,
AGENTAPI_SAVE_STATE, AGENTAPI_LOAD_STATE, AGENTAPI_PID_FILE) that the
binary reads directly. No consumer module changes needed.
New variables: enable_state_persistence (default false),
state_file_path, pid_file_path. State and PID files default to
$HOME/<module_dir_name>/.
Requires agentapi >= v0.12.0. A shared version_at_least function in
lib.sh gates the env var exports and SIGUSR1 in the shutdown script.
Old binaries get a warning and graceful skip.
Shutdown script now does SIGUSR1 (state save), log snapshot capture
(existing, now fault-tolerant via subshell), then SIGTERM with wait.
Closes coder/internal#1257
Refs coder/internal#1256
Refs #696
Captures the last 10 messages from AgentAPI when task workspaces stop,
allowing users to view conversation history while the task is paused.
The shutdown script fetches messages, builds a payload with last 10
messages, truncates to 64KB if needed (removes old messages first, then
truncates content of the last message), and posts to the log snapshot
endpoint.
Gracefully handles non-task workspaces (skips), older Coder versions
without the endpoint (logs and continues), and empty message sets.
Enabled by default via task_log_snapshot variable. Task ID is
automatically resolved from data.coder_task when available.
Updates coder/internal#1257
