Company Brain MCP tools for account resolution and evidence-backed briefings

[100yenadmin]

Upstream epic: electricsheephq/electric-sheep#2029
Related: #24, #25

Summary

Add explicit company_brain_* plugin tools so OpenClaw/evaOS agents consume Company Brain through account-scoped, source-backed contracts instead of generic always-on memory injection.

Tool Scope

Proposed minimum tool set:

• company_brain_accounts_list / search: resolve stable Cortex account IDs and workspace IDs.
• company_brain_account_brief: fetch source-backed account context and honest missing-evidence buckets.
• company_brain_account_timeline: fetch artifact and claim events with source citations.
• company_brain_query: ask narrow pilot questions such as what_changed, who_needs_follow_up, what_is_blocked, and daily_account_briefing.
• Optional dry-run helper for action candidates that preserves requires_approval, action_readiness, verification_status, and visibility_scope.

Integration Rules

• Require deterministic account/workspace resolution before injecting account context into a turn.
• Preserve source citations and action-readiness metadata in tool output.
• Do not flatten source-backed account memory into generic personal memory.
• Treat insufficient_evidence as a first-class successful response, not a tool failure.
• Do not allow the agent to silently act on approval-gated follow-up/action candidates.

Acceptance Criteria

• Plugin tools call the live Cortex Company Brain endpoints landed in electricsheephq/electric-sheep #2026, #2027, and #2028.
• Tool schemas match the Cortex fixture/examples issue electricsheephq/electric-sheep#2033 once available.
• Tests cover account resolution, missing evidence, cited facts, action-readiness flags, and failure handling.
• Documentation explains how this relates to Company Brain injection mode #24 injection mode and Action-safety bridge for Company Brain context #25 action safety.

Non-Goals

• No broad rewrite of the existing Cortex plugin memory model.
• No autonomous outbound action execution.
• No dashboard UI work in this repo.

[100yenadmin]

Implemented by #28.

Landed explicit company_brain_* plugin tools for account list/search, account brief, account timeline, and narrow query. The tools call the Cortex HTTP/proxy contract, preserve citations and action-readiness metadata, and treat insufficient_evidence as a successful honest response.