[pashbel]

Summary

Adds multi-provider work to estafeta. An orchestrator in any provider can:

• consult another agent;

• request a cross-review;

• delegate a planned phase to a worker of another provider;

• coordinate peer agents that the user opened.

• Skill agent-relay (6th skill) with adapters for:

  • host-native tasks: T3 delegate_task, same-provider subagents;
  • headless CLIs: codex exec, claude -p, gemini -p.

  Flags that bypass the worker's sandbox are never used by default.

• Runtime delegate (providers, start, status, collect, cancel).

  • The ledger lives beside the state, so state schema 2 is unchanged.
  • CLI workers run as supervised runtimes with a timeout.
  • A writer's claims are checked against its recorded checks, the DONE gate
    in its workspace, and its workspace changes against a baseline.

• Golden path tests (scripts/test_relay.py). Five representative
  interaction sequences, with an expected result at every step:

  • a stub worker plays them on every change and in the new CI workflow;
  • live runs are verified with --live-verify.

• Docs and release. Docs, guide and the 3.1.0 manifests are updated, and
  .github/workflows/ci.yml is added.

Plan and decisions: docs/plans/multi-provider.md. Evidence:
packs/session-workflow/VALIDATION.md.

Verification

• macOS, Python 3.9.6:
  • runtime 70/70, installer 21/21, golden 5/5 scenarios (79 steps);
  • workflow.py check and claude plugin validate passed;
  • four deliberate regressions were each caught by a golden step.
• Live, Codex gpt-6.1-sol through T3: a delegated write in a fixture, and
  two cross-review rounds. Round 1 found 12 issues and round 2 found 5; all
  are fixed with tests.
• Live, claude -p CLI worker: consult on Haiku 5.5, and a write under
  the OS sandbox on Sonnet 5.5.

Not verified

• live codex exec / gemini -p CLI transports;
• the Gemini/Antigravity route;
• native Linux and Windows (this CI run will be the first on Linux);
• a third review round on the round 2 fixes.

🤖 Generated with Claude Code