v0.53.0

Minor release: the fleet control plane grows an agent-shaped surface, and Claude token telemetry stops reading zero.

Added

The fleet control plane is served as MCP from the event-server Worker (#923). POST /mcp on the Worker exposes the same control plane the hosted console already drives, so an agent binds to named tools with declared schemas instead of re-deriving the /fleet/* URL shapes, the 202-then-poll contract, and the per-command argument shapes. The read half only — bobi_fleet_status, bobi_instance_detail, bobi_command_result — each calling in-process the same builder its HTTP route calls, so there is no second implementation of the read model and no HTTP hop. Stateless: one McpServer per request, no Durable Object, no session id. Auth is the existing FLEET_OPERATOR_TOKEN via requireOperator, checked in the route before any tool body runs — the MCP route widens the interface, not the authority. Nothing here can restart, stop, or message an instance. A team consumes the endpoint with no framework change, via mcp_servers type: http plus headers.

Self-hosters redeploying their own Worker: wrangler.jsonc now sets compatibility_flags: ["nodejs_compat"], and it is not optional. createMcpHandler carries its per-request context in an AsyncLocalStorage, so the bundle imports node:async_hooks; without the flag workerd refuses to start and every route on the script goes down with it, bus included. The compatibility date is past 2024-09-23, so the flag is additive rather than replacing workerd's own APIs.

bobi agent <name> costs backfill recovers lost token telemetry (#935, #936). Reads Claude's retained JSONL transcripts and fills the token counters the defect below left at zero. Dry run by default, --write to apply, idempotent across runs. It only ever fills: recorded tokens and provider dollars are never overwritten, last_activity is never bumped, and a session whose transcript is gone stays honestly unknown rather than estimated into place. Against a real 151-session registry it repaired 112 with provider dollars byte-identical before and after. costs became a command group; the bare costs invocation is unchanged.

Fixed

Claude token counts were recorded as zero while the dollars arrived (#935, #936). claude_agent_sdk 0.2.128 passes the CLI's modelUsage through verbatim, so its keys are camelCase, but _one_model_usage_to_cost read only the legacy snake_case spellings — every token field came back 0 while total_cost_usd arrived on a separate attribute, producing exactly the reported shape of rows with dollars and no tokens. Each field is now read across both spellings, first match wins. AssistantMessage.usage is deliberately untouched: it is the raw Anthropic API shape, which is genuinely snake_case.

Changed

Documentation re-verified against the tree it describes (#937, #938, #939). The review-remediation plan re-checked all 229 items against main and its Lane D swept 24 of them: repo-root and pack docs, stale specs, and the engine, monitor, event-server, and setup-skill references that had drifted from the code.

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Full changelog: https://github.com/moda-labs/bobi-agent/blob/v0.53.0/CHANGELOG.md