Add observability: token tracking, error logging, action audit trail#22
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Add observability: token tracking, error logging, action audit trail#22
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New modules: - logger.js: structured JSONL logger with cost estimation, used by all components - tools/logs.js: 3 tools (log_cost_summary, log_search, log_errors) so the agent can query its own usage and debug issues Wired into: - Brain: logs every API call (tokens, cost, advisor usage, duration) and every tool execution (name, args, result, duration, errors) - Kernel: logs auto-commits, rollbacks, verification pass/fail - Webchat: logs inbound messages Logs written to .state/logs/ as daily-rotated JSONL files. Cost estimation built in for Sonnet, Opus, and Haiku pricing. Closes #21 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Per-tool logs: each tool execution writes to both the aggregate
tools log and a dedicated tools-{name} log (e.g. tools-execute_shell).
Enables isolated debugging per tool across time.
Reasoning traces: heartbeat and cron cycles now capture the entire
brain conversation (text, tool calls, tool results) to traces/ logs.
You can reconstruct exactly what the agent thought and did in each
autonomous cycle, including partial traces on failure.
75 tests passing (3 new trace/per-tool tests).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Every execution context (heartbeat cycle, cron job, conversation turn) gets a unique trace_id that flows through brain → API calls → tool calls. This enables: - log_cost_per_task: "heartbeat hb_1712880000_a cost $0.0234 (3 API calls)" - Correlate all API calls and tool executions to the task that triggered them - See exactly which heartbeat cycle was expensive and why Also adds costByTrace() to the logger for aggregating costs by trace. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
log_cost_summary,log_search,log_errors.state/logs/Why this is first
Every unconscious process we build after this will automatically have observability. The agent can check its own costs, debug errors, and understand what happened during the day.
Test plan
Closes #21
🤖 Generated with Claude Code