Priority 3 — Cost mode enforcement:
- Removed session_max_bytes/max_uncompacted_turns from DaemonConfig; cost
mode string is now the single source of truth for all thresholds
- maybe_compact_or_rollover() derives thresholds from CostMode, not static
config fields
- compact_oldest_turns() takes a keep parameter (derived from cost mode)
- compact_tool_result() wired into build_prompt_messages() — tool results
are truncated when cost mode says to compact
- trim_to_budget() called in build_prompt_assembly()
- auto_escalate() wired into session_rotation() — escalates cost mode
when compaction is insufficient
- set-cost-mode socket command now updates runtime cost_mode (RwLock on
DaemonState) instead of just acknowledging
Priority 2 — Pi spawn path end-to-end:
- poll_tasks() now queries claimed tasks, spawns the configured agent
binary (COLIBRI_AGENT_BINARY), creates a session, wires stdout to
glasspane, and transitions the task to Started
- stream_agent_stdout_to_glasspane made pub for cross-module access
- poll_tasks called from scheduler_tick_fn after the scheduler runs
- New integration test: poll_tasks_spawns_agent_for_claimed_task validates
the full path: create task → claim → poll_tasks spawns → glasspane
observes Idle → Working → Blocked → Done lifecycle
Gates: fmt/clippy/test all green (207 tests, 0 failures).
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