feat: Prayer integration — zero-token grind loop offloading

[Savolent]

Summary

Adds PrayerManager and PrayerClient to @roci/core for offloading repetitive, deterministic action sequences to Prayer — a local .NET companion service that runs PrayerLang scripts with zero LLM tokens.

The idea: body turns are expensive (Claude API tokens) and slow (subprocess overhead). For known sequences — mining loops, sell runs, refuel routes — the agent emits a PRAYER_SET:\n...\nPRAYER_END block. The harness picks this up, hands it to Prayer, and polls for halts. Claude only resumes when something interesting happens (cargo full, fuel low, combat, script end), at which point it receives a rich grind summary and plans next steps.

New files:

• packages/core/src/prayer/prayer-client.ts — HTTP client for the Prayer backend. Session lifecycle, snapshot polling, long-poll state change detection, script execution, route/stats queries, local-LLM script repair endpoint.

• packages/core/src/prayer/prayer-manager.ts — Per-agent session manager:

  • PrayerManager.create(baseUrl, csprojPath?) — health-checks; optionally starts Prayer via dotnet run
  • ensureSession(agentId, username, password, sessionFile?) — session persistence via file survives harness restarts
  • startScript(agentId, script) — hands PrayerLang script to backend
  • pollOnce / pollWithLongPoll — efficient halt detection
  • getFullStateForResume — cargo, credits, missions, arbitrage, memory log for brain context
  • parsePrayerScript(output) / buildPrayerSummary(result, fullState) — parse agent output, format resume context

Updated:

• packages/core/src/index.ts — exports PrayerManager, PrayerClient, parsePrayerScript, buildPrayerSummary and all related types
• README.md — Prayer setup instructions with link to https://github.com/Savolent/Prayer

Prayer is not included

The .NET service itself lives at Savolent/Prayer. This PR only adds the client library and manager. Prayer is entirely optional — if PrayerManager.create() returns null (service not running, no csprojPath), the harness falls back to normal body turns with no behavior change.

Test plan

• PrayerManager.create(url) returns null when Prayer is not running and no csprojPath given
• ensureSession reads persisted session file on restart, validates it, falls back to new session if stale
• parsePrayerScript extracts script from PRAYER_SET:\n...\nPRAYER_END correctly
• buildPrayerSummary formats cargo, credits, mission, and grind log into readable context

🤖 Generated with Claude Code