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Cascade routing core: two-model user selection + escalate-on-gate-failure flow

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
48/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Active
Tech stack
typescript
Domain
cli, tooling

Research direction

Start with parent #1134 and the verification-gate subtask, then trace the config schema, CLI flags, interactive picker, session-start validation, and TUI/status-line entry points. Add tests for config validation, escalation after gate failure, no escalation after a pass, and unattended attempt counts; done means both user-selected providers validate and every routing decision is surfaced.

Written by the indexing model from the issue text.

Description

Parent: #1134

Implement the routing core:

  • Config schema: route.mode: "cascade", route.primary: "<provider/model>", route.escalation: "<provider/model>", route.primary_attempts (default 1 interactive, 3 unattended).
  • Both models are USER-SELECTED (config file, CLI flags, and interactive picker); validate both are configured providers at session start; clear error if not.
  • Flow: run task on primary → on verification-gate failure (see gate subtask) escalate: restart the task on the escalation model, carrying the task prompt and a compact failure summary (what the gate rejected), NOT the full failed transcript.
  • Session UX: routing decisions surfaced in the TUI/status line ("primary: X", "escalated to Y: build failed"), never silent.
  • Tests: config validation, escalate-on-failure, no-escalate-on-pass, unattended attempt count.
Dominant language
TypeScript
Stars
813
Forks
134
Avg merge
1d 18h
Merged PRs (30d)
59

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