Best possible solution:

Land the narrow harness typing fix after required checks/review, keeping the mock partial instead of forcing production-shaped model, auth, and registry objects into focused tests.

Do we have a high-confidence way to reproduce the issue?

Yes, source-reproducible: current main infers the resolver mock return type without reasoning, while a current test overrides that mock with reasoning: true. I did not run the typecheck in this read-only sweep.

Is this the best way to solve the issue?

Yes, this is the narrowest maintainable fix for the test-harness type failure; a full production resolver return type would make focused tests construct irrelevant model, auth, and registry fields.

AGENTS.md: found and applied where relevant.

Codex review notes: model gpt-5.5, reasoning high; reviewed against cd9c643dc6ef.

Label changes:

• add P2: The PR addresses a current core test typecheck failure on main with limited blast radius and no runtime behavior change.
• add rating: 🐚 platinum hermit: Overall readiness is 🐚 platinum hermit; proof is 🌊 off-meta tidepool and patch quality is 🐚 platinum hermit.
• add status: 👀 ready for maintainer look: ClawSweeper has no concrete contributor-facing blocker left for this PR. Not applicable: The real-behavior proof gate is not applicable because this is a maintainer/member test-only type fix with verification commands listed in the PR body.

Label justifications:

• P2: The PR addresses a current core test typecheck failure on main with limited blast radius and no runtime behavior change.
• rating: 🐚 platinum hermit: Overall readiness is 🐚 platinum hermit; proof is 🌊 off-meta tidepool and patch quality is 🐚 platinum hermit.
• status: 👀 ready for maintainer look: ClawSweeper has no concrete contributor-facing blocker left for this PR. Not applicable: The real-behavior proof gate is not applicable because this is a maintainer/member test-only type fix with verification commands listed in the PR body.

PR surface:

Source +14. Total +14 across 1 file.

What I checked:

• PR diff: The provided PR patch for head ae556e5 adds MockResolvedModel / MockResolveModelAsync and applies it as the generic type for mockedResolveModelAsync, with no runtime file changes. (src/agents/embedded-agent-runner/run.overflow-compaction.harness.ts:53, ae556e56ca1d)
• Current main mock inference: Current main leaves mockedResolveModelAsync untyped, so TypeScript infers the default mock model shape from fields that do not include reasoning. (src/agents/embedded-agent-runner/run.overflow-compaction.harness.ts:105, cd9c643dc6ef)
• Current test override: Current main has an overflow-compaction loop test that overrides the resolver mock with reasoning: true, matching the field the PR adds to the mock return type. (src/agents/embedded-agent-runner/run.overflow-compaction.loop.test.ts:116, cd9c643dc6ef)
• Runtime caller needs only partial reasoning shape: The embedded runner's initial thinking selection accepts model: { reasoning?: boolean }, so the focused test double does not need a full production Model object for this behavior. (src/agents/embedded-agent-runner/run.ts:233, cd9c643dc6ef)
• Production resolver contract checked: resolveModelAsync returns production AuthStorage and ModelRegistry objects, while the tests intentionally use partial doubles; the PR's local mock type keeps that harness boundary explicit. (src/agents/embedded-agent-runner/model.ts:1396, cd9c643dc6ef)
• History provenance: Blame shows the shared mock harness came from f8f53de, and the reasoning: true test override came from 443ac73. (src/agents/embedded-agent-runner/run.overflow-compaction.harness.ts:105, f8f53de45a62)

Likely related people:

• Vincent Koc: git blame points the shared overflow-compaction harness mock, including the untyped resolver double, to commit f8f53de. (role: introduced shared harness behavior; confidence: high; commits: f8f53de45a62; files: src/agents/embedded-agent-runner/run.overflow-compaction.harness.ts)
• Vinayaka Jyothi: git blame points the MiniMax-M3 reasoning override that exposed the resolver mock type issue to commit 443ac73. (role: recent adjacent test contributor; confidence: high; commits: 443ac732a11d; files: src/agents/embedded-agent-runner/run.overflow-compaction.loop.test.ts)

• 🦀 challenger crab: rare, exceptional readiness with strong proof, clean implementation, and convincing validation.
• 🦞 diamond lobster: very strong readiness with only minor maintainer review expected.
• 🐚 platinum hermit: good normal PR, likely mergeable with ordinary maintainer review.
• 🦐 gold shrimp: useful signal, but proof or patch confidence is still limited.
• 🦪 silver shellfish: thin signal; proof, validation, or implementation needs work.
• 🧂 unranked krab: not merge-ready because proof is missing/unusable or there are serious correctness or safety concerns.
• 🌊 off-meta tidepool: rating does not apply to this item.

Shiny media proof means a screenshot, video, or linked artifact directly shows the changed behavior. Runtime, network, CSP, and security claims still need visible diagnostics.

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